JP2022104937A - Fluid injection device, gas turbine engine and method for manufacturing fluid injection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid injection device that can inject fluid properly with a small flow rate to a large flow rate while efficiently arranging a flow passage in a limited space, and to provide a gas turbine engine including a fluid injection device and a method for manufacturing a fluid injection device.

SOLUTION: A fluid injection device 10 includes at least two flow passages 20. Those at least two flow passages 20 are arranged side by side in an end part 26 into which fluid flows. The end part from which the fluid flow out is provided with one of the flow passages 20 (first flow passage 21) so as to surround the other at least one flow passage 20 (second flow passage 22).

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to a fluid injection device, a gas turbine engine including the fluid injection device, and a method for manufacturing the fluid injection device.

In aircraft engines, the amount of fuel required changes significantly in the series of processes from engine ignition to ground idling to takeoff (maximum thrust output), and the amount of fuel injected (discharged) from the fuel nozzle is also small. It can be changed from a flow rate to a large flow rate.

When trying to cover the range from a small flow rate to a large flow rate with one oil passage, the fuel pressure is low when injecting a small flow rate fuel from the nozzle, but a large flow rate fuel is injected from the nozzle. In some cases, it is necessary to increase the fuel pressure, which puts a heavy burden on the fuel pump mounted on the engine. Therefore, the nozzle mounted on an aircraft engine generally has two independent oil passages, fuel flows only to the first oil passage at a small flow rate, and the first system is used to increase the fuel flow rate. By flowing fuel not only in the oil passage but also in the second oil passage, it is possible to flow a large amount of fuel at a low fuel pressure.

Further, in general, the "direction in which fuel flows into the fuel nozzle" and the "direction in which fuel is injected from the fuel nozzle" are different. Therefore, the conventional fuel nozzle provided with the above-mentioned two oil passages has a structure in which each of the two independent oil passages bends at a steep angle in the middle.

For example, Patent Document 1 discloses a fuel nozzle support system for a gas turbine engine.
The fuel nozzle support system includes an elongated stem body, an inflow side end having a primary fuel inlet and a secondary fuel inlet, and an outflow side end having a primary fuel outlet and a secondary fuel outlet. Concentric longitudinal secondary fuel holes that communicate the secondary fuel inlet and the secondary fuel outlet, and are located inside the secondary fuel holes and at the inflow side end and the outflow side end. It is attached in a sealed state and includes concentric primary fuel pipes that communicate the primary fuel inlet and the primary fuel outlet. In this fuel nozzle support system, as shown in FIG. 1 (cross-sectional view) of Patent Document 1, "the first oil passage from the primary fuel inlet to the primary fuel outlet" and "secondary fuel flow". The "second oil passage from the inlet to the secondary fuel outlet" is bent at a steep angle on the way.

Special Table 2003-515718A

As described above, in the conventional nozzle for fuel injection, the flow path is bent at a steep angle, so that the pressure loss is relatively large. In order to inject a large flow rate of fuel while suppressing the pressure loss, the pipe diameter may be increased, but in this case, the size of the fuel injection nozzle itself becomes large. If an attempt is made to increase the pipe diameter without increasing the size of the fuel injection nozzle itself, the strength of the fuel injection nozzle itself will decrease, and it will be difficult to secure the required strength.

Further, a fuel injection nozzle in which a plurality of deep hole-shaped oil passages having a circular cross section are arranged in parallel is also conceivable. However, when the fuel injection nozzle having such an oil passage configuration is provided in a small size, it is difficult to increase the cross-sectional area of each oil passage, and the pressure loss of each oil passage is also large.

The present invention has been made in view of the above circumstances, and it is possible to appropriately inject a fluid (for example, fuel, etc.) from a small flow rate to a large flow rate while efficiently arranging the flow path in a limited space. It is an object of the present invention to provide a capable fluid injection device, a gas turbine engine including such a fluid injection device, and a method for manufacturing such a fluid injection device. The present invention also provides a fluid injection device including a flow path having good strength and a small pressure loss, a gas turbine engine including such a fluid injection device, and a method for manufacturing such a fluid injection device. For other purposes.

One aspect of the present invention is a fluid injection device including at least two flow paths, in which at least two flow paths are independently from the end where the fluid flows in to the end where the fluid flows out. The walls of the are smoothly connected, at the end where the fluid flows in, they are arranged side by side, and at the end where the fluid flows out, one flow path is provided so as to surround at least one other flow path. Regarding the fluid injection device.

Each of the at least two channels has a bend, and one channel is provided at least at the bend so as to have a larger cross-sectional diameter than the upstream side and surround the other at least one channel. May be good.

At least two flow paths include a first flow path and a second flow path, and the first flow path and the second flow path are on the upstream side of the bent portion and toward the second flow path rather than the first flow path. However, in the bent portion, the cross-sectional diameter of the first flow path is larger than that on the upstream side, the first flow path surrounds the second flow path, and the downstream side from the bent portion , The first flow path may extend so as to surround the second flow path.

At least two flow paths include a first flow path and a second flow path, and the first flow path and the second flow path have a first flow path on the upstream side of the bent portion and a second flow path rather than the second flow path. In the bent part, the cross-sectional diameter of the first flow path is larger than that on the upstream side and the first flow path surrounds the second flow path. The first flow path may extend so as to surround the second flow path.

The cross section of the first flow path may have a line-symmetrical shape at least on the downstream side of the bent portion.

The cross section of the first flow path may have an annular shape at least on the downstream side of the bent portion.

At least two channels may include a linearly extending first channel and a second channel.

The wall portion forming the second flow path may be connected to the wall portion forming the first flow path arranged outside the wall portion forming the second flow path via the holding portion. ..

The wall portion forming the second flow path may be connected to the wall portion forming the first flow path via two or more holding portions.

The two or more holding portions may include a plurality of holding portions having different cross-sectional widths from each other.

The holding portion may include a holding portion having a cross-sectional width larger than the cross-sectional width of the second flow path.

Another aspect of the present invention relates to a gas turbine engine provided with the above-mentioned fluid injection device and in which fluid fuel is flowed through at least two flow paths of the fluid injection device.

Another aspect of the present invention is a step of specifying the three-dimensional shape data of the above-mentioned fluid injection device, a step of converting the three-dimensional shape data into a plurality of slice data, and a laminated molding method based on the plurality of slice data. The present invention relates to a step of forming a fluid injection device and a method of manufacturing the fluid injection device including.

In the laminated molding method, at least one powder of Inconel, cobalt chromium, nickel alloy, titanium alloy and stainless steel may be used.

The average particle size of the powder may be 20 micrometers or less.

At least two flow paths included in the fluid injection device may include a flow path whose cross section is deformed at least in part.

According to the present invention, since one of at least two flow paths included in the fluid injection device is provided so as to surround the other at least one flow path, the flow path can be efficiently created in a limited space. While arranging, a fluid from a small flow rate to a large flow rate can be injected from the fluid injection device. Further, since one of the at least two flow paths provided in the fluid injection device is provided so as to surround the other at least one flow path, the pressure loss is reduced while ensuring the good strength of the fluid injection device. A small flow path can be realized. According to the present invention, it is possible to provide a gas turbine engine including such a fluid injection device and a method for manufacturing such a fluid injection device.

FIG. 1 is a vertical sectional view of the fluid injection device according to the first embodiment. FIG. 2 is a perspective view of the fluid injection device shown in FIG. 1, showing a state in which a portion on the tip side of the cross-sectional line II-II of FIG. 1 is removed. FIG. 3 is a perspective view of the fluid injection device shown in FIG. 1, showing a state in which a portion on the tip side of the cross-sectional lines III-III of FIG. 1 is removed. FIG. 4 is a perspective view of the fluid injection device shown in FIG. 1, showing a state in which a portion on the tip side of the cross-sectional line IV-IV of FIG. 1 is removed. FIG. 5 is a perspective view of the fluid injection device shown in FIG. 1, showing a state in which a portion on the tip side of the cross-sectional line VV of FIG. 1 is removed. FIG. 6 is a perspective view of the fluid injection device shown in FIG. 1, showing a state in which a portion on the tip side of the cross-sectional line VI-VI of FIG. 1 is removed. FIG. 7 is an enlarged view of a tip portion (fluid outflow portion) of the fluid injection device as seen from the direction indicated by the arrow A in FIG. FIG. 8 is a vertical sectional view of the fluid injection device according to another example (comparative example). FIG. 9 is a vertical sectional view of the fluid injection device according to the second embodiment. FIG. 10 is a perspective view of the fluid injection device shown in FIG. 9, and shows a state in which a portion on the tip side of the cross-sectional line XX of FIG. 9 is removed. 11 is a perspective view of the fluid injection device shown in FIG. 9, and shows a state in which a portion on the tip side of the cross-sectional line XI-XI of FIG. 9 is removed. FIG. 12 is a block diagram showing a functional configuration example of a gas turbine engine. FIG. 13 is a flowchart showing an example of a method for manufacturing a fluid injection device. FIG. 14 is a diagram for explaining the additive manufacturing method, and is a perspective view showing a state of the fluid injection device in the modeling process. FIG. 15 is a diagram for explaining the additive manufacturing method, and is a perspective view showing a state of the fluid injection device in the modeling process. FIG. 16 is a diagram for explaining the additive manufacturing method, and is a perspective view showing a state of the fluid injection device in the modeling process. FIG. 17 is a diagram for explaining the additive manufacturing method, and is a perspective view showing a state of the fluid injection device in the modeling process. FIG. 18 is a diagram for explaining the additive manufacturing method, and is a perspective view showing a state of the fluid injection device in the modeling process. FIG. 19 is a diagram for explaining the additive manufacturing method, and is a perspective view showing a state of the fluid injection device in the modeling process. FIG. 20 is a diagram for explaining the additive manufacturing method, and is a perspective view showing a state of the fluid injection device in the modeling process. FIG. 21 shows an example of the cross-sectional shape of a plurality of flow paths (first flow path and second flow path) included in the fluid injection device. FIG. 22 shows an example of the cross-sectional shape of a plurality of flow paths (first flow path and second flow path) included in the fluid injection device. FIG. 23 shows an example of the cross-sectional shape of a plurality of flow paths (first flow path and second flow path) included in the fluid injection device. FIG. 24 shows an example of the cross-sectional shape of a plurality of flow paths (first flow path and second flow path) included in the fluid injection device. FIG. 25 shows an example of the cross-sectional shape of a plurality of flow paths (first flow path and second flow path) included in the fluid injection device. FIG. 26 shows an example of the cross-sectional shape of a plurality of flow paths (first flow path and second flow path) included in the fluid injection device. FIG. 27 shows an example of the cross-sectional shape of a plurality of flow paths (first flow path and second flow path) included in the fluid injection device. FIG. 28 shows an example of the cross-sectional shape of a plurality of flow paths (first flow path and second flow path) included in the fluid injection device. FIG. 29 shows an example of the cross-sectional shape of a plurality of flow paths (first flow path and second flow path) included in the fluid injection device. FIG. 30 shows an example of the cross-sectional shape of a plurality of flow paths (first flow path and second flow path) included in the fluid injection device. FIG. 31 shows an example of the cross-sectional shape of a plurality of flow paths (first flow path and second flow path) included in the fluid injection device. FIG. 32 shows an example of the cross-sectional shape of a plurality of flow paths (first flow path and second flow path) included in the fluid injection device. FIG. 33 shows an example of the cross-sectional shape of a plurality of flow paths (first flow path and second flow path) included in the fluid injection device. FIG. 34 shows an example of the cross-sectional shape of a plurality of flow paths (first flow path and second flow path) included in the fluid injection device. FIG. 35 is a vertical cross-sectional view of the fluid injection device in which the vicinity of the downstream flow path of the first flow path and the second flow path is partially excerpted, and the connection mode of the first flow path wall portion and the second flow path wall portion. It is a figure for demonstrating an example. FIG. 36 is a vertical cross-sectional view of a fluid injection device in which the vicinity of the first flow path and the downstream side flow path of the second flow path is partially excerpted, and is a connection mode of the first flow path wall portion and the second flow path wall portion. It is a figure for demonstrating an example. FIG. 37 is a vertical cross-sectional view of the fluid injection device, which is a partial excerpt of the vicinity of the first flow path and the downstream side flow path of the second flow path, and is a connection mode of the first flow path wall portion and the second flow path wall portion. It is a figure for demonstrating an example. FIG. 38 is a view of the fluid injection device (fluid outflow portion) seen from the arrow B in FIG. 37. FIG. 39 is a vertical cross-sectional view of the fluid injection device showing a modification of the fluid injection device, and shows an example of the fluid injection device not including a bent portion. FIG. 40 is a view of the fluid injection device (fluid outflow portion) seen from the arrow C in FIG. 39. FIG. 41 is a cross-sectional view of the fluid injection device along the cross-sectional line XLI-XLI of FIG. 39. FIG. 42 is a cross-sectional view of the fluid injection device along the cross-sectional line XLII-XLII of FIG. FIG. 43 is a cross-sectional view of the fluid injection device along the cross-sectional lines XLIII-XLIII of FIG.

A plurality of embodiments and modifications of the present invention will be described with reference to the drawings. For ease of explanation and understanding, the elements shown in each drawing include elements whose scale and aspect ratio have been changed or exaggerated from those of the actual ones, and the shape of each element, The size and other forms do not always exactly match between the drawings.

Each embodiment of the invention described below relates to a fluid injection device comprising at least two channels. These flow paths are provided side by side on the upstream side thereof, while one flow path is deformed on the downstream side so as to surround at least one other flow path. As a result, the fluid injection device can appropriately inject a fluid from a small flow rate to a large flow rate while effectively suppressing an increase in the size of the fluid injection device. The "upstream side" and "downstream side" are based on the flow direction of the fluid (fuel), and the fluid flows from the upstream side to the downstream side.

Hereinafter, as an example, a fluid injection device (fuel injection nozzle) that is a fluid injection device having two mutually independent flow paths and injects liquid fuel (fluid) will be described. In order to reduce the pressure loss of the fuel oil passage (flow path), each of the two independent oil passages is gentle while ensuring a sufficient cross-sectional area (flow path area) according to the maximum flow rate of each. The extending direction is changed so as to draw a curve. Further, in order to reduce the cross-sectional area of the product itself, the two oil passages are arranged in parallel on the upstream side, but are arranged so as to have a concentric cross-sectional structure on the downstream side. In particular, the wall portion forming the inner oil passage and the wall portion forming the outer oil passage of the concentric cross-sectional structure are connected to each other via ribs (holding portions), or are directly connected to each other and integrated. The appropriate oil passage strength is ensured. It is preferable that such ribs have a plate-like structure extending in the fuel flow direction and have a thickness as thin as possible so as not to obstruct the flow of fuel.

Hereinafter, specific embodiments will be described.

<First Embodiment>
FIG. 1 is a vertical sectional view of the fluid injection device 10 according to the first embodiment. FIG. 2 is a perspective view of the fluid injection device 10 shown in FIG. 1, and shows a state in which a portion on the tip side of the cross-sectional line II-II of FIG. 1 is removed. FIG. 3 is a perspective view of the fluid injection device 10 shown in FIG. 1, and shows a state in which a portion on the tip side of the cross-sectional lines III-III of FIG. 1 is removed. FIG. 4 is a perspective view of the fluid injection device 10 shown in FIG. 1, showing a state in which a portion on the tip side of the cross-sectional line IV-IV of FIG. 1 is removed. FIG. 5 is a perspective view of the fluid injection device 10 shown in FIG. 1, and shows a state in which a portion on the tip end side of the cross-sectional line VV of FIG. 1 is removed. FIG. 6 is a perspective view of the fluid injection device 10 shown in FIG. 1, and shows a state in which a portion on the tip end side of the cross-sectional line VI-VI of FIG. 1 is removed. FIG. 7 is an enlarged view of a tip portion (fluid outflow portion 27) of the fluid injection device 10 as viewed from the direction indicated by the arrow A in FIG.

The fluid injection device 10 of the present embodiment includes two flow paths 20 (first flow path 21 and second flow path 22), and the first flow path 21 and the second flow path 22 are the fluid of the fluid injection device 10. It penetrates the fluid injection device 10 from the inflow section 26 to the fluid outflow section 27. The fluid inflow portion 26 is an end portion of the fluid injection device 10 into which fuel (fluid) flows. The fluid outflow portion 27 is an end portion of the fluid injection device 10 from which fuel flows out (injects).

The first flow path 21 and the second flow path 22 are arranged side by side in the fluid inflow section 26, and in the fluid outflow section 27, one flow path (the first flow path 21 in this embodiment) becomes another flow path (in this embodiment). In this embodiment, it is provided so as to surround the second flow path 22). In the illustrated example, the second flow path 22 is arranged substantially at the center (center) of the cross section of the first flow path 21.

Each of the first flow path 21 and the second flow path 22 has a bent portion 25. Of the first flow path 21 and the second flow path 22, the flow path on the upstream side of the bent portion 25 is referred to as the upstream side flow path 28, and the flow path on the downstream side of the bent portion 25 is referred to as the downstream side flow path 29. Call. Each upstream flow path 28 of the first flow path 21 and the second flow path 22 opens in the fluid inflow section 26, and each downstream flow path 29 of the first flow path 21 and the second flow path 22 flows out of the fluid. It opens in the portion 27.

The first flow path 21 (one flow path) has a larger cross-sectional diameter than the upstream upstream side flow path 28 at least in the bent portion 25 (in the bent portion 25 and the downstream side flow path 29 in this embodiment). Moreover, it is provided so as to surround the second flow path 22 (at least one other flow path). The cross-sectional diameter of the first flow path 21 referred to here is the cross-sectional diameter of the first flow path 21 in the direction perpendicular to the flow direction of the fuel flowing through the first flow path 21 (that is, the extending direction of the first flow path 21). The diameter. The cross-sectional diameter of the first flow path 21 is the cross-sectional diameter of the region surrounded by the first flow path wall portion 31 forming the first flow path 21, and is the rib 35 described later (the first rib 35a in this embodiment, When the first flow path 21 is partitioned by the second rib 35b and the third rib 35c), the cross-sectional diameter of the first flow path 21 can be determined in the same manner.

As described above, in the first flow path 21 and the second flow path 22 of the present embodiment, in the upstream side flow path 28 on the upstream side of the bent portion 25, the second flow path 22 is larger than the first flow path 21. , Placed close to the end of the fluid outflow (ie, the fluid outflow portion 27). Therefore, regarding the opening positions of the first flow path 21 and the second flow path 22 in the fluid inflow section 26, the opening of the second flow path 22 is closer to the fluid outflow section 27 than the opening of the first flow path 21. Be placed. Further, in the bent portion 25, the cross-sectional diameter of the first flow path 21 is larger than that of the upstream side flow path 28 on the upstream side, and the first flow path 21 surrounds the second flow path 22. Then, in the downstream flow path 29 on the downstream side of the bent portion 25, the first flow path 21 and the second flow path 22 extend so that the first flow path 21 surrounds the second flow path 22.

The cross sections of the first flow path 21 and the second flow path 22 are line-symmetrical at least on the downstream side of the bent portion 25 (in the present embodiment, at all positions from the fluid inflow portion 26 to the fluid outflow portion 27). Has a shape. The cross section of the first flow path 21 and the second flow path 22 referred to here is a cut surface in a direction perpendicular to the fuel flow direction (that is, the extending direction of the flow path). In the illustrated example, the first flow path 21 has a circular cross section in the upstream side flow path 28, and has a line-symmetrical annular (annular) cross section from the bent portion 25 to the downstream side flow path 29 (FIG. 2 to 6). On the other hand, the second flow path 22 has a circular cross section at all positions from the fluid inflow portion 26 to the fluid outflow portion 27.

The second flow path wall portion 32 forming the second flow path 22 is relative to the “first flow path wall portion 31 forming the first flow path 21” arranged outside the second flow path wall portion 32. , Are connected via a rib 35 (holding portion). More specifically, the second flow path wall portion 32 is the first stream via two or more ribs 35 (in this embodiment, three ribs 35 (first rib 35a, second rib 35b, and third rib 35c)). It is connected to the road wall portion 31. These two or more ribs 35 (first rib 35a, second rib 35b and third rib 35c) include a plurality of ribs 35 having different cross-sectional widths from each other. In the examples shown in FIGS. 2 to 3, the second rib 35b and the third rib 35c have substantially the same cross-sectional width, but the first rib 35a has a larger cross-sectional width than the second rib 35b and the third rib 35c. In particular, the first rib 35a of this example has a cross-sectional width larger than the cross-sectional width of the second flow path 22. The cross-sectional width referred to here is determined based on the length in the cross section in the direction perpendicular to the fuel flow direction (for example, the maximum length of the projection).

When a plurality of ribs 35 are provided as described above, these plurality of ribs 35 are used as the first flow path wall from the viewpoint of supporting the first flow path wall portion 31 and the second flow path wall portion 32 in a well-balanced manner. It is preferable that the portions 31 and the second flow path wall portion 32 are arranged at equal intervals and / or symmetrically (for example, line-symmetrical or rotationally symmetric) with respect to the peripheral direction of the second flow path 22. In the examples shown in FIGS. 2 to 7, "the first flow path 21 between the first rib 35a and the second rib 35b" and "the first flow path 21 between the second rib 35b and the third rib 35c". And "the first flow path 21 between the first rib 35a and the third rib 35c" have substantially the same cross-sectional shape.

FIG. 8 is a vertical sectional view of the fluid injection device 10a according to another example (comparative example). In the fluid injection device 10a shown in FIG. 8, each flow path 20 (first flow path 21 and second flow path 22) extends in parallel (parallel) with each other from the fluid inflow section 26 to the fluid outflow section 27. Exists. In the fluid injection device 10a of this comparative example, it is not easy to increase the flow path area (cross-sectional area) of the first flow path 21 and the second flow path 22 in a limited space, and the first flow path 21 and the first flow path 21 and the first flow path 22 are not easy to increase. The bent portion 25 of the two flow paths 22 bends at a very sharp angle. Therefore, the pressure loss in the bent portion 25 of the first flow path 21 and the second flow path 22 is large, and the energy loss is large. Further, in the flow path configuration of the fluid injection device 10a of this comparative example, in order to realize a large flow path area while ensuring the strength of each flow path 20 (first flow path 21 and second flow path 22), fluid injection is performed. It is necessary to increase the size of the entire device 10a, and it is difficult to reduce the size of the fluid injection device 10a.

On the other hand, the fluid injection device 10 according to the first embodiment has the following structural features as described above.
a. In the fuel inflow section (fluid inflow section 26), two independent fuel oil passages (first flow path 21 and second flow path 22) are provided in parallel.
b. The two fuel oil passages (first flow path 21 and second flow path 22) each change the extending direction while drawing a gentle curve, and the fuel outflow portion (fluid outflow portion 27) has a concentric cross-sectional structure. Has.
c. Ribs 35 (first rib 35a, second rib 35b, and third rib 35c) are provided between the first flow path wall portion 31 and the second flow path wall portion 32, and each fuel oil passage is provided by the rib 35. The strength of (first flow path 21 and second flow path 22) is secured.

According to the fluid injection device 10 (see FIGS. 1 to 7) according to the first embodiment having these structural features, since the first flow path 21 is provided so as to surround the second flow path 22, the fluid injection The flow path areas of the first flow path 21 and the second flow path 22 can be relatively large while suppressing the increase in size of the entire device 10. In particular, by making the first flow path 21 surround the second flow path 22 in the bent portion 25, a sufficiently large cross-sectional area (flow path area) of the first flow path 21 and the second flow path 22 can be obtained. While ensuring, the bending of the first flow path 21 and the second flow path 22 in the bent portion 25 can be made gentle (that is, the curvature can be reduced). As a result, the fuel can smoothly flow through the bent portion 25 of the first flow path 21 and the second flow path 22 in a state where the pressure loss is small. Further, in the present embodiment, on the upstream side of the bent portion 25, the second flow path 22 is arranged closer to the fluid outflow portion 27 than the first flow path 21, and therefore, the first flow in the bent portion 25. The curvature of the path 21 can be made relatively small so that the first flow path 21 can be gently curved. On the other hand, by arranging the first flow path 21 and the second flow path 22 in parallel in the fluid inflow section 26, it is easy to introduce fuel into the first flow path 21 and the second flow path 22 from the outside. It can be carried out. Further, the required strength can be secured by the ribs (first rib 35a, second rib 35b and third rib 35c).

As described above, according to the fluid injection device 10 of the present embodiment, each flow path 20 (first flow path 21 and second flow path 22) is efficiently arranged in a limited space from a small flow rate. It is possible to appropriately inject fuel up to a large flow rate, and to realize a flow path with a small pressure loss while ensuring good strength.

The configuration of the fluid injection device 10 according to the first embodiment is not limited to the examples shown in FIGS. 1 to 7, and various modifications can be made. Specific examples of such deformation will be described later.

<Second Embodiment>
FIG. 9 is a vertical sectional view of the fluid injection device 10 according to the second embodiment. FIG. 10 is a perspective view of the fluid injection device 10 shown in FIG. 9, and shows a state in which a portion on the tip end side of the cross-sectional line XX of FIG. 9 is removed. 11 is a perspective view of the fluid injection device 10 shown in FIG. 9, and shows a state in which a portion on the tip side of the cross-sectional line XI-XI of FIG. 9 is removed.

In the present embodiment, the same or similar elements as those in the first embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted.

The fluid injection device 10 according to the present embodiment has substantially the same configuration and shape as the fluid injection device 10 according to the first embodiment described above in appearance. However, the configuration of the plurality of flow paths 20 (first flow path 21 and second flow path 22) is different between the fluid injection device 10 according to the present embodiment and the fluid injection device 10 according to the first embodiment. There is.

That is, in the first flow path 21 and the second flow path 22 of the present embodiment, in the upstream side flow path 28 on the upstream side of the bent portion 25, the first flow path 21 is more fluid than the second flow path 22. Is placed in close proximity to the outflow end (ie, the fluid outflow portion 27). Therefore, regarding the opening positions of the first flow path 21 and the second flow path 22 in the fluid inflow section 26, the opening of the first flow path 21 is closer to the fluid outflow section 27 than the opening of the second flow path 22. Be placed. Further, in the bent portion 25, the cross-sectional diameter of the first flow path 21 is larger than that of the upstream side flow path 28 on the upstream side, and the first flow path 21 surrounds the second flow path 22. Further, in the downstream flow path 29 on the downstream side of the bent portion 25, the first flow path 21 extends so as to surround the second flow path 22.

The fluid injection device 10 of the present embodiment also includes three ribs 35 (first rib 35a, second rib 35b, and third rib 35c), and these ribs 35 are the first flow path wall portion 31 and the second flow path. The second flow path 22 is arranged with respect to the wall portion 32 at equal intervals and symmetrically with respect to the peripheral direction as in the first embodiment, and "the first flow path between the first rib 35a and the second rib 35b". 21 ”,“ first flow path 21 between the second rib 35b and the third rib 35c ”and“ first flow path 21 between the first rib 35a and the third rib 35c ”have substantially the same cross-sectional shape. Has. However, in the present embodiment, these three ribs 35 (first rib 35a, second rib 35b, and third rib 35c) have the same cross-sectional width and cross-sectional shape, and each rib 35 has a second cross-sectional width. It is smaller than the cross-sectional width of the flow path 22.

According to the fluid injection device 10 according to the second embodiment, as in the fluid injection device 10 of the first embodiment, the first flow path 21 is provided so as to surround the second flow path 22, so that the fluid injection device is provided. It is possible to make the flow path areas of the first flow path 21 and the second flow path 22 relatively large while suppressing the increase in size of the entire 10. In particular, by making the first flow path 21 surround the second flow path 22 in the bent portion 25, a sufficiently large cross-sectional area (flow path area) of the first flow path 21 and the second flow path 22 can be obtained. While ensuring the bending, the bending of the first flow path 21 and the second flow path 22 in the bent portion 25 can be made gentle, and the pressure loss can be reduced. Further, according to the present embodiment, the ribs 35 can be arranged in a well-balanced manner.

As described above, even with the fluid injection device 10 of the present embodiment, each flow path 20 (first flow path 21 and second flow path 22) is efficiently arranged in a limited space, and the flow rate is small to large. It is possible to appropriately inject fuel up to the flow rate, and to realize a flow path with a small pressure loss while ensuring good strength.

The configuration of the fluid injection device 10 according to the second embodiment is not limited to the examples shown in FIGS. 9 to 11, and various modifications can be made. Specific examples of such deformation will be described later.

<Application field of fluid injection device>
The fluid injection device 10 according to the present invention as described above is suitably applicable to, for example, an aircraft engine, and can contribute to miniaturization and weight reduction of a jet engine. However, the scope of application of the fluid injection device 10 according to the present invention is not particularly limited, and it is applied not only to the engine of an aircraft used as a civilian aircraft and a fighter aircraft, but also to various other devices that require fluid injection. It is possible. Therefore, for example, the present invention can be suitably applied to an apparatus that is required to variably inject a liquid or gas substance from a small flow rate to a large flow rate.

In the following, as an example, a case where the fluid injection device 10 according to the present invention is applied to a gas turbine engine will be illustrated.

FIG. 12 is a block diagram showing a functional configuration example of the gas turbine engine 50.

The gas turbine engine 50 includes an air supply device 51 that supplies compressed air for combustion to the combustor 52, and a turbine 53 that is rotated by being fed with high-temperature and high-pressure combustion gas generated by combustion of fuel in the combustor 52. And prepare. The fluid injection device 10 according to the present invention can be suitably used as a device for feeding fuel to the combustor 52.

<Manufacturing method of fluid injection device>
The fluid injection device 10 according to the present invention as described above can be easily and highly accurately manufactured by, for example, an AM (Additive Manufacturing) device. However, the method for manufacturing the fluid injection device according to the present invention is not particularly limited, and the fluid injection device 10 may be manufactured based on a technique other than the "three-dimensional modeling technique by the AM device".

In the following, as an example, a case where the fluid injection device 10 according to the present invention is manufactured by an AM device (not shown) will be illustrated.

FIG. 13 is a flowchart showing an example of a manufacturing method of the fluid injection device 10. The method for manufacturing the fluid injection device 10 of this example includes a step of specifying the three-dimensional shape data of the above-mentioned fluid injection device 10 (S11 and S12 in FIG. 13) and a step of converting the three-dimensional shape data into a plurality of slice data. (S13) and a step (S14) of modeling the fluid injection device 10 by a laminated modeling method based on a plurality of slice data. The three-dimensional shape data referred to here is data indicating the shape of the three-dimensional structure (fluid injection device 10). The slice data is cross-sectional data obtained by slicing a three-dimensional structure (fluid injection device 10), and the "step of converting three-dimensional shape data into a plurality of slice data (S13)" is a plurality of slice data. Can be executed based on any processing that can be derived from the 3D shape data. Each of the above steps can be performed under the control of the controller of the AM device and / or the controller of the control device that controls the AM device. For example, "specification of three-dimensional shape data (see S11 and S12)" and "acquisition of slice data (see S13)" can be performed by one or more controllers.

The flow path 20 (first flow path 21 and second flow path 22) included in the fluid injection device 10 according to each of the above-described embodiments has a deformed cross section at least in a part thereof, and the fluid injection device 10 has a deformed cross section. It has a relatively complicated flow path configuration. Therefore, in the manufacturing method of this example, first, the three-dimensional shape data of the flow path 20 (first flow path 21 and the second flow path 22) of the fluid injection device 10 is specified (S11), and then the fluid injection device. Three-dimensional shape data of other elements of 10 are specified (S12).

The above-mentioned laminated molding method typically forms a layered structure by sintering a metal powder with a laser, and sequentially stacks a plurality of layered structures to produce a desired three-dimensional structure. It's a technology. The metal powder used in such a laminated molding method is not particularly limited, but typically at least one powder of Inconel, cobalt chromium, nickel alloy, titanium alloy and stainless steel can be used. Further, the average particle size of the powder used in the laminated molding method can be about 20 micrometers to 40 micrometers, and is particularly preferably 20 micrometers or less.

14 to 20 are views for explaining the additive manufacturing method, and are perspective views showing a state of the fluid injection device 10 in the modeling process. The fluid injection device 10 shown in FIGS. 14 to 20 has the same flow path configuration (first flow path 21 and second flow path 22) as the fluid injection device 10 of the first embodiment described above, and is on the upstream side. In the flow path 28, the second flow path 22 is arranged closer to the fluid outflow portion 27 than the first flow path 21, and in the bent portion 25 and the downstream flow path 29, the first flow path 21 is the second flow path. It extends so as to surround 22.

Although FIGS. 14 to 20 show an example in which the fluid injection device 10 is gradually formed from the portion shown on the left side of the figure toward the portion shown on the right side, the modeling direction by the additive manufacturing method is shown. Not particularly limited. Therefore, for example, the fluid injection device 10 may be gradually formed from the lower portion shown in FIGS. 14 to 20 toward the upper portion.

According to the above-mentioned additive manufacturing method, the fluid injection device 10 is gradually made for each layer, and finally, the fluid injection device 10 having a desired flow path configuration can be made with high accuracy.

<Modification example>
The configuration of the fluid injection device 10 described above is only an example, and various modifications can be applied to the fluid injection device 10. A specific modification example will be described below.

<Example of modification of the cross-sectional shape of the flow path>
21 to 34 show examples of cross-sectional shapes of a plurality of flow paths 20 (first flow path 21 and second flow path 22) included in the fluid injection device 10. The cross-sectional shape of each flow path 20 (first flow path 21 and second flow path 22) is not particularly limited, and the cross-sectional shape of each flow path is a circular shape (including a perfect circular shape and an elliptical shape) and a polygonal shape (including a perfect circular shape and an elliptical shape). (Including triangular, square and pentagonal shapes) and other shapes are possible. Further, the relative positional relationship between the flow paths 20 is not particularly limited, and for example, the second flow path 22 may be arranged substantially in the center of the cross section of the first flow path 21, or may cross the first flow path 21. Another flow path 20 such as the second flow path 22 may be arranged at a position off the center of the surface. Further, the fluid injection device 10 may include three or more flow paths 20. Further, the plurality of flow paths 20 included in the fluid injection device 10 may have different cross-sectional shapes from each other, or may include two or more flow paths 20 having the same cross-sectional shape to each other.

Further, the mode in which the first flow path 21 surrounds another flow path (second flow path 22 or the like) is not particularly limited, and the first flow path 21 may surround the entire circumference of the other flow path, or another flow path. The first flow path 21 may surround only a part of the circumference of the road. Further, the mode in which the first flow path 21 surrounds another flow path (second flow path 22 or the like) may be the same over the bent portion 25 and the downstream region (downstream side flow path 29) from the bent portion 25. In a region downstream of the bent portion 25 and the bent portion 25 (downstream side flow path 29), the first flow path 21 may surround another flow path (second flow path 22 or the like) in a plurality of embodiments.

For example, in the example shown in FIG. 21, the second flow path 22 has a cross section of "an elliptical shape in which the long axis is set in the horizontal direction in the figure", and the first flow path 21 is "from the vertical direction in the figure". Also has a laterally long annulus-shaped cross section.

In the example shown in FIG. 22, the second flow path 22 has a cross section of "an elliptical shape in which the long axis is set in the vertical direction in the figure", and the first flow path 21 is "more than in the horizontal direction in the figure". It has a "long annulus shape in the vertical direction" cross section.

In the example shown in FIG. 23, the second flow path 22 has a circular (specifically, elliptical) cross section, and the first flow path 21 has a ring-shaped cross section having a triangular outer shape.

In the example shown in FIG. 24, the second flow path 22 has a circular (specifically, elliptical) cross section, and the first flow path 21 has a ring-shaped cross section having a rectangular outer shape.

In the example shown in FIG. 25, the second flow path 22 has a circular (specifically, elliptical) cross section, and the first flow path 21 has a ring-shaped cross section having a pentagonal outer shape.

The first flow path wall portion 31 and the second flow path wall portion 32 may be connected via ribs 35 (see FIGS. 21 to 25), and the first flow path wall portion 31 and the second flow path may be connected. The road wall portion 32 may be directly connected and integrally configured (see FIG. 23).

In the example shown in FIG. 26, the second flow path 22 has a circular (specifically, perfect circular) cross section, the first flow path 21 has an annular cross section, and the first flow path has an annular cross section. The wall portion 31 and the second flow path wall portion 32 are connected via a rib 35. The cross-sectional width of the rib 35 is larger than the cross-sectional width of the second flow path 22 and smaller than the cross-sectional width of the first flow path 21.

In the example shown in FIG. 27, the second flow path 22 has a circular (specifically, perfect circular) cross section, the first flow path 21 has an annular cross section, and the first flow path has an annular cross section. The wall portion 31 and the second flow path wall portion 32 are connected via a plurality of ribs 35 (two ribs 35). The plurality of ribs 35 (two ribs 35) are arranged at positions facing each other with the second flow path 22 interposed therebetween, and have different cross-sectional shapes from each other. In this example, the cross-sectional width of one rib 35 is larger than the cross-sectional width of the second flow path 22, and the cross-sectional width of the other rib 35 is smaller than the cross-sectional width of the second flow path 22.

In the example shown in FIG. 28, the second flow path 22 has a circular (specifically, perfect circular) cross section, the first flow path 21 has an annular cross section, and the first flow path has an annular cross section. The wall portion 31 and the second flow path wall portion 32 are connected via a plurality of ribs 35 (two ribs 35). The plurality of ribs 35 (two ribs 35) are arranged at positions facing each other with the second flow path 22 interposed therebetween, and have the same cross-sectional shape to each other. In this example, the cross-sectional width of each rib 35 is smaller than the cross-sectional width of the first flow path 21 and the second flow path 22.

In the example shown in FIG. 29, the second flow path 22 has a circular (specifically, perfect circular shape) cross section, and the first flow path 21 is a part of the second flow path 22 (shown in FIG. 29). In the example, it has a cross section that covers the lower side in the figure), and the first flow path wall portion 31 and the second flow path wall portion 32 are directly connected to each other.

In the example shown in FIG. 30, three flow paths 20 are provided. That is, the second flow path 22 and the third flow path 23 are arranged side by side, and the first flow path 21 is provided so as to surround the second flow path 22 and the third flow path 23. The second flow path 22 and the third flow path 23 have a circular (specifically, perfect circular) cross section, and the first flow path 21 has an annular cross section. In this example, the second flow path 22 and the third flow path 23 are formed by the second flow path wall portion 32, and the first flow path wall portion 31 and the second flow path wall portion 32 are connected via the rib 35. ing.

In the example shown in FIG. 31, the second flow path 22 is provided at a position off the center of the cross section of the first flow path 21. In the illustrated example, the first flow path 21 and the second flow path 22 have a circular (specifically, perfect circular) cross section.

In the example shown in FIG. 32, the first flow path 21, the second flow path 22, the first flow path wall portion 31, the second flow path wall portion 32, and the rib 35 have the same cross-sectional shape as the example shown in FIG. 26. However, the position of the rib 35 is provided on the left side in the drawing.

In the example shown in FIG. 33, the first flow path 21, the second flow path 22, the first flow path wall portion 31, the second flow path wall portion 32, and the rib 35 have the same cross-sectional shape as the example shown in FIG. 26. However, the position of the rib 35 is provided on the lower side in the drawing.

In the example shown in FIG. 34, the second flow path 22 has a rectangular (specifically, square) cross section, and the first flow path 21 has a ring-shaped cross section having a rectangular outer shape. The first flow path wall portion 31 and the second flow path wall portion 32 are connected via a rib 35.

Each flow path 20 (first flow path 21, second flow path 22 and third flow path 23) is any one of FIGS. 21 to 34 in at least a part of the bent portion 25 and the downstream side flow path 29. It is possible to have the cross-sectional shape shown in one drawing or two or more drawings.

<Modification example regarding the connection mode of the first flow path wall portion 31 and the second flow path wall portion 32>
FIG. 35 is a vertical cross-sectional view of the fluid injection device 10 in which the vicinity of the downstream flow path 29 of the first flow path 21 and the second flow path 22 is partially excerpted, and is a vertical cross-sectional view of the first flow path wall portion 31 and the second flow path. It is a figure for demonstrating an example of the connection mode of the wall part 32. In this example, the second flow path wall portion 32 is directly connected to the first flow path wall portion 31 in at least the entire area of the downstream side flow path 29 of the downstream side flow path 29 and the bent portion 25. The first flow path wall portion 31 and the second flow path wall portion 32 are integrally configured.

FIG. 36 is a vertical cross-sectional view of the fluid injection device 10 in which the vicinity of the downstream flow path 29 of the first flow path 21 and the second flow path 22 is partially excerpted, and is a vertical cross-sectional view of the first flow path wall portion 31 and the second flow path. It is a figure for demonstrating an example of the connection mode of the wall part 32. In this example, a plurality of flow paths 29 arranged apart from each other in the extending direction (fuel flow direction) of the flow path 20 in at least the entire area of the downstream side flow path 29 among the downstream side flow path 29 and the bent portion 25. The second flow path wall portion 32 is intermittently connected to the first flow path wall portion 31 via the rib 35.

FIG. 37 is a vertical cross-sectional view of the fluid injection device 10 in which the vicinity of the downstream flow path 29 of the first flow path 21 and the second flow path 22 is partially excerpted, and is a vertical cross-sectional view of the first flow path wall portion 31 and the second flow path. It is a figure for demonstrating an example of the connection mode of the wall part 32. FIG. 38 is a view of the fluid injection device 10 (fluid outflow portion 27) seen from the arrow B in FIG. 37. In this example, each of the plurality of ribs 35 extends in the extending direction (fuel flow direction) of the flow path 20 in at least the entire area of the downstream side flow path 29 of the downstream side flow path 29 and the bent portion 25. The second flow path wall portion 32 is continuously connected to the first flow path wall portion 31 via the plurality of ribs 35.

<Flow path not including the bent part>
In the fluid injection device 10 according to each of the above-described embodiments, each flow path 20 (first flow path 21, second flow path 22 and third flow path 23) has a bent portion 25, but each flow path 20 is bent. It is not necessary to have the part 25.

FIG. 39 is a vertical cross-sectional view of the fluid injection device 10 showing a modification of the fluid injection device 10, showing an example of the fluid injection device 10 not including a bent portion. FIG. 40 is a view of the fluid injection device 10 (fluid outflow portion 27) seen from the arrow C in FIG. 39. FIG. 41 is a cross-sectional view of the fluid injection device 10 along the cross-sectional line XLI-XLI of FIG. 39. FIG. 42 is a cross-sectional view of the fluid injection device 10 along the cross-sectional line XLII-XLII of FIG. 39. FIG. 43 is a cross-sectional view of the fluid injection device 10 along the cross-sectional lines XLIII-XLIII of FIG.

In the fluid injection device 10 of this example, the first flow path 21 and the second flow path 22 extend linearly from the fluid inflow section 26 to the fluid outflow section 27. Also in this example, the plurality of flow paths 20 (first flow path 21 and second flow path 22) are arranged side by side in the fluid inflow section 26, but in the process from the fluid inflow section 26 to the fluid outflow section 27. , The cross-sectional diameter of the first flow path 21 is increased so that the first flow path 21 gradually surrounds the second flow path 22 (see FIGS. 41 to 43). In the fluid outflow portion 27, the first flow path 21 surrounds the second flow path 22, and the first flow path wall portion 31 is connected to the second flow path wall portion 32 via the rib 35 (see FIG. 40). ..

<Typical aspects and effects>
The typical features of the above-mentioned "fluid injection device 10", "gas turbine engine 50" and "method for manufacturing the fluid injection device 10" and their effects are listed below for each aspect. It does not necessarily have to follow the embodiment, and may be based on other embodiments.

[First aspect]
The fluid injection device 10 includes at least two flow paths 20 (first flow path 21 and second flow path 22 (and third flow path 23) in each of the above-described embodiments and modifications), and at least two flow paths. 20 are arranged side by side at the end (fluid inflow portion 26) where the fluid (fuel) flows in, and one flow path (first flow path 21) at the end (fluid outflow portion 27) where the fluid flows out. Is provided so as to surround at least one other flow path (second flow path 22 (and third flow path 23)).

According to this aspect, the fluid injection device 10 includes at least two flow paths 20, and these flow paths 20 are provided side by side on the upstream side thereof and one flow path 20 on the downstream side (first flow path 21). ) Is deformed by enlargement or the like, and the one flow path 20 is provided so as to surround at least one other flow path (second flow path 22 and third flow path 23). In this way, one flow path 20 surrounds at least one other flow path 20 on the downstream side, so that the fluid injection device 10 can be compared with "when two or more flow paths 20 are provided side by side on the downstream side". , It is possible to properly inject a fluid from a small flow rate to a large flow rate without increasing the size. Further, since the other at least one flow path 20 is surrounded by the one flow path 20, the other at least one flow path 20 is less likely to be affected by the outside. For example, the temperature of the fluid flowing through at least one other flow path 20 (second flow path 22 and third flow path 23) changes (rises and falls) even if the temperature around the fluid injection device 10 changes. It is difficult to do so, and the temperature fluctuation of the fluid can be mitigated.

The flow path 20 may or may not be bent. The number of flow paths 20 is typically two, but three or more flow paths may be provided. Further, the arrangement of the plurality of flow paths 20 is not particularly limited, and the plurality of flow paths can be arranged horizontally or vertically with reference to the downstream direction. Further, the form of the portion of one flow path 20 that surrounds at least one other flow path 20 is not particularly limited, and a symmetric cross-sectional shape (for example, a line-symmetrical cross-sectional shape (annular cross-sectional shape, triangular outer shape) is used. It may have a ring cross-sectional shape having a ring cross-sectional shape, a ring cross-sectional shape having a rectangular outer shape, a ring cross-sectional shape having a polygonal outer shape, etc.)), or may have an asymmetric cross-sectional shape.

[Second aspect]
Each of the at least two flow paths 20 has a bent portion 25, and one flow path 20 (first flow path 21) has a larger cross-sectional diameter than the upstream side and at least one other at least in the bent portion 25. It may be provided so as to surround one flow path (second flow path 22 (and third flow path 23)).

According to this aspect, each flow path 20 is bent in the middle thereof, and at least in the bent portion 25, the cross-sectional area of one flow path 20 (first flow path 21) is larger than that on the upstream side. The flow path 20 (first flow path 21) can surround at least one other flow path (second flow path 22 (and third flow path 23)). By expanding the bent portion 25 so that one flow path 20 surrounds at least one other flow path 20, the pressure loss in one flow path 20 can be significantly reduced.

[Third aspect]
At least two flow paths 20 include a first flow path 21 and a second flow path 22, and the first flow path 21 and the second flow path 22 are located upstream of the bent portion 25 from the first flow path 21. The second flow path 22 is arranged closer to the end where the fluid flows out (fluid outflow part 27), and in the bent part 25, the cross-sectional diameter of the bent part 25 of the first flow path 21 is larger than that on the upstream side. The first flow path 21 may be large and surround the second flow path 22, and the first flow path 21 may extend so as to surround the second flow path 22 on the downstream side of the bent portion 25.

According to this aspect, the first flow path 21 and the second flow path 22 can be arranged side by side on the upstream side, and one flow path (first flow path 21) is one flow path at the bent portion 25. The cross-sectional area of (first flow path 21) can be made larger than the cross-sectional area of another one flow path (second flow path 22), and can be expanded so as to surround the other flow path (second flow path 22). By arranging the first flow path 21 and the second flow path 22 in this way, it is possible to increase the cross-sectional area of the first flow path 21 in the bent portion 25 while suppressing the size of the entire fluid injection device 10. be. Further, the flow path 20 having a relatively large cross-sectional area can have a smaller curvature than the flow path 20 having a relatively small cross-sectional area, and the first flow path 21 and the second flow path 22 (particularly the first flow path 21) can be made smaller. ) Can effectively reduce the pressure loss at the bent portion 25. In this embodiment, a plurality of flow paths can be arranged vertically with reference to the downstream direction.

[Fourth aspect]
At least two flow paths 20 include a first flow path 21 and a second flow path 22, and the first flow path 21 and the second flow path 22 are on the upstream side of the bent portion 25 and on the upstream side of the second flow path 22. The first flow path 21 is arranged closer to the end where the fluid flows out (fluid outflow part 27), and in the bent portion 25, the cross-sectional diameter of the first flow path 21 is larger than that on the upstream side and the first flow. The road 21 may extend so as to surround the second flow path 22, and the first flow path 21 may extend so as to surround the second flow path 22 on the downstream side of the bent portion 25.

According to this aspect, the first flow path 21 and the second flow path 22 can be arranged side by side on the upstream side, and one flow path (first flow path 21) is one flow path at the bent portion 25. The cross-sectional area of (first flow path 21) can be made larger than the cross-sectional area of another one flow path (second flow path 22), and can be expanded so as to surround the other flow path (second flow path 22). By arranging the first flow path 21 and the second flow path 22 in this way, it is possible to increase the cross-sectional area of the first flow path 21 in the bent portion 25 while suppressing the size of the entire fluid injection device 10. Therefore, the pressure loss in the bent portion 25 of the first flow path 21 and the second flow path 22 (particularly the first flow path 21) can be effectively reduced.

[Fifth aspect]
The cross section of the first flow path 21 may have a line-symmetrical shape at least on the downstream side of the bent portion 25.

According to this aspect, one flow path (first flow path 21) can be provided so as to surround the other one flow path (second flow path 22) line-symmetrically. The line symmetry referred to here includes, for example, a case where the line symmetry is line symmetry with respect to the direction corresponding to the direction toward which the upstream side of the flow path is headed. The cross-sectional shape (line-symmetrical shape) of such a "one flow path (first flow path 21) that surrounds the other one flow path (second flow path 22) in line symmetry" is not particularly limited, and is, for example, a circle. It can be annular, triangular, quadrangular or other polygonal. By adopting the configuration of this embodiment, the fluid from the upstream flows symmetrically toward the downstream, so that the fluid flow becomes smooth and the pressure loss can be effectively reduced.

[Sixth aspect]
The cross section of the first flow path 21 may have an annular shape at least on the downstream side of the bent portion 25.

According to this aspect, one flow path (first flow path 21) can be provided so as to surround the other one flow path (second flow path 22) in an annular shape. In this way, even when the bent portion 25 is provided in each flow path 20, the flow paths 20 are arranged vertically with reference to the downstream direction, and the surrounding structure of the flow paths 20 is line-symmetrical (for example, the first flow). By making the cross-sectional shape of the path 21 an annular line symmetry), it is possible to eliminate the corners on the downstream side of the first flow path 21, and the fluid flow becomes smooth and the pressure loss is effectively reduced. Can be reduced.

[7th aspect]
At least two flow paths 20 may include a linearly extending first flow path 21 and a second flow path 22.

As in this embodiment, the present invention can be applied even when the first flow path 21 and the second flow path 22 do not include a bent portion, and while efficiently arranging the flow path 20 in a limited space, It is possible to realize a fluid injection device 10 including a flow path 20 capable of injecting a fluid from a small flow rate to a large flow rate, having good strength, and having a small pressure loss.

[Eighth aspect]
The wall portion forming the second flow path 22 (second flow path wall portion 32) is arranged outside the wall portion forming the second flow path 22 (second flow path wall portion 32). It may be connected to the wall portion (first flow path wall portion 31) forming the flow path 21 via a holding portion (rib 35).

According to this aspect, another one flow path (second flow path 22) is provided on the wall surface (inner wall surface) of the first flow path wall portion 31 forming one flow path (first flow path 21). It can be firmly held by the holding portion (rib 35). Therefore, even if an external force is applied to the fluid injection device 10, the second flow path 22 is stably held in the first flow path 21. The form of the holding portion is not particularly limited, and for example, at one or more of the top, bottom, left, and right positions based on the flow path cross section (cross-sectional view) in the direction perpendicular to the flow direction of the fluid. One or more holdings may be provided that extend continuously (integrally) or discontinuously (intermittently) with respect to the flow direction of the fluid.

[9th aspect]
The wall portion (second flow path wall portion 32) forming the second flow path 22 is the wall portion (first flow path wall portion) forming the first flow path 21 via two or more holding portions (ribs 35). It may be connected to 31).

According to this aspect, a plurality of holding portions (ribs 35) can be provided, and the second flow path 22 can be held in a well-balanced manner. The form of the holding portion is not particularly limited, and for example, at one or more of the top, bottom, left, and right positions based on the flow path cross section (cross-sectional view) in the direction perpendicular to the flow direction of the fluid. A plurality of holding portions may be provided that extend continuously (integrally) or discontinuously (intermittently) with respect to the flow direction of the fluid. Further, the plurality of holding portions may have different cross-sectional widths (sizes in the cross section), or may have the same cross-sectional widths as each other.

[10th aspect]
The two or more holding portions (ribs 35) may include a plurality of holding portions having different cross-sectional widths from each other.

According to this aspect, at least two holding portions (ribs 35) are provided, and the cross-sectional width of one holding portion (rib 35) in the bent portion 25 of the flow path 20 is set to "the other at least one flow path 20 (the first). The cross-sectional width of the two flow paths 22 (and the third flow path 23)) can be made larger than the cross-sectional width of the other holding portion (rib 35), and the cross-sectional width of the other holding portion (rib 35) can be made smaller than the width of the one holding portion. In this way, since the strength is secured by one holding portion having a relatively large cross-sectional width among the two or more holding portions, the cross-sectional width of the other holding portion is reduced and secured by the other holding portion. The strength can be weakened. This makes it possible to reduce the size of the fluid injection device 10. The form of the holding portion is not particularly limited, and for example, at one or more of the top, bottom, left, and right positions based on the flow path cross section (cross-sectional view) in the direction perpendicular to the flow direction of the fluid. A plurality of holding portions may be provided that extend continuously (integrally) or discontinuously (intermittently) with respect to the flow direction of the fluid.

[Eleventh aspect]
The holding portion (rib 35) may include a holding portion (rib 35) having a cross-sectional width larger than the cross-sectional width of the second flow path 22.

According to this aspect, in the bent portion 25, the cross-sectional width of the holding portion (rib 35) can be made larger than the cross-sectional width of the second flow path 22. By doing so, it is possible to stably determine the relative position of the second flow path 22 with respect to the first flow path 21 while appropriately positioning the second flow path 22. The form of the holding portion is not particularly limited, and for example, at one or more of the top, bottom, left, and right positions based on the flow path cross section (cross-sectional view) in the direction perpendicular to the flow direction of the fluid. One or more holdings may be provided that extend continuously (integrally) or discontinuously (intermittently) with respect to the flow direction of the fluid.

[Twelfth aspect]
The gas turbine engine 50 includes the above-mentioned fluid injection device 10, and fluid fuel is flowed through at least two flow paths 20 of the fluid injection device 10.

According to this aspect, the fluid fuel from a small flow rate to a large flow rate can be appropriately injected from the fluid injection device 10 while suppressing the increase in size of the fluid injection device 10. Therefore, it is possible to provide a gas turbine engine 50 that can be flexibly adapted to various flow rates of fluid fuel while effectively reducing the size.

[13th aspect]
The method for manufacturing the fluid injection device 10 includes a step of specifying the three-dimensional shape data of the above-mentioned fluid injection device 10, a step of converting the three-dimensional shape data into a plurality of slice data, and a laminated modeling based on the plurality of slice data. Includes a step of modeling the fluid injection device 10 by the method.

According to this aspect, it is possible to easily and highly accurately manufacture a fluid injection device 10 capable of appropriately injecting a fluid from a small flow rate to a large flow rate while suppressing an increase in size.

[14th aspect]
In the laminated molding method, at least one powder of Inconel, cobalt chromium, nickel alloy, titanium alloy and stainless steel may be used.

According to this aspect, the fluid injection device 10 having excellent high temperature resistance can be manufactured.

[Fifteenth aspect]
The average particle size of the powder may be 20 micrometers or less.

According to this aspect, the fluid injection device 10 having excellent high temperature resistance can be manufactured.

[16th aspect]
At least two flow paths included in the fluid injection device may include a flow path whose cross section is deformed at least in part.

According to this aspect, even a fluid injection device including a complicated flow path can be manufactured reliably and with high accuracy.

The present invention is not limited to the above-described embodiments and modifications, but may include various embodiments to which various modifications that can be conceived by those skilled in the art are added, and the effects produced by the present invention are also described above. It is not limited to the matters of. Therefore, various additions, changes, and partial deletions can be made to the scope of claims and each element described in the specification without departing from the technical idea and purpose of the present invention.

10 Fluid injection device 10a Fluid injection device 20 Flow path 21 First flow path 22 Second flow path 23 Third flow path 25 Bending part 26 Fluid inflow part 27 Fluid outflow part 28 Upstream side flow path 29 Downstream side flow path 31 First Flow path wall portion 32 Second flow path wall portion 35 Rib 35a First rib 35b Second rib 35c Third rib 50 Gas turbine engine 51 Air supply device 52 Combustor 53 Turbine

Claims (16)

A fluid injection device having at least two channels.
The at least two channels
Independently, the wall surface of the flow path is smoothly connected from the end where the fluid flows in to the end where the fluid flows out.
At the end where the fluid flows in, they are arranged side by side.
A fluid injection device in which one flow path surrounds at least one other flow path at the end where the fluid flows out. Each of the at least two channels has a bend and
The fluid injection device according to claim 1, wherein the one flow path has a cross-sectional diameter larger than that on the upstream side and is provided so as to surround at least one other flow path at least in the bent portion. The at least two channels include a first channel and a second channel.
The first flow path and the second flow path are
On the upstream side of the bent portion, the second flow path is arranged closer to the end where the fluid flows out than the first flow path.
In the bent portion, the cross-sectional diameter of the first flow path is larger than that on the upstream side, and the first flow path surrounds the second flow path.
The fluid injection device according to claim 2, wherein on the downstream side of the bent portion, the first flow path extends so as to surround the second flow path. The at least two channels include a first channel and a second channel.
The first flow path and the second flow path are
On the upstream side of the bent portion, the first flow path is arranged closer to the end where the fluid flows out than the second flow path.
In the bent portion, the cross-sectional diameter of the first flow path is larger than that on the upstream side, and the first flow path surrounds the second flow path.
The fluid injection device according to claim 2, wherein on the downstream side of the bent portion, the first flow path extends so as to surround the second flow path. The fluid injection device according to claim 3 or 4, wherein the cross section of the first flow path has a line-symmetrical shape at least on the downstream side of the bent portion. The fluid injection device according to claim 5, wherein the cross section of the first flow path has an annular shape at least on the downstream side of the bent portion. The fluid injection device according to claim 1, wherein the at least two flow paths include a linearly extending first flow path and a second flow path. The wall portion forming the second flow path is connected to the wall portion forming the first flow path arranged outside the wall portion forming the second flow path via a holding portion. The fluid injection device according to any one of claims 3 to 7. The fluid injection device according to claim 8, wherein the wall portion forming the second flow path is connected to the wall portion forming the first flow path via two or more holding portions. The fluid injection device according to claim 9, wherein the two or more holding portions include a plurality of holding portions having different cross-sectional widths from each other. The fluid injection device according to any one of claims 8 to 10, wherein the holding portion includes a holding portion having a cross-sectional width larger than the cross-sectional width of the second flow path. The fluid injection device according to any one of claims 1 to 11 is provided.
A gas turbine engine in which fluid fuel is flowed through at least two channels of the fluid injection device. The step of specifying the three-dimensional shape data of the fluid injection device according to any one of claims 1 to 11.
The step of converting the three-dimensional shape data into a plurality of slice data,
A method for manufacturing a fluid injection device, which comprises a step of modeling the fluid injection device by a layered manufacturing method based on the plurality of slice data. The method for manufacturing a fluid injection device according to claim 13, wherein the laminated molding method uses at least one powder of Inconel, cobalt chrome, nickel alloy, titanium alloy and stainless steel. The method for manufacturing a fluid injection device according to claim 14, wherein the average particle size of the powder is 20 micrometers or less. The method for manufacturing a fluid injection device according to any one of claims 13 to 15, wherein the at least two flow paths included in the fluid injection device include a flow path whose cross section is deformed at least in a part.

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