CN204988692U - Experimental clamping device of using of nozzle air mass flow - Google Patents

Abstract

The utility model discloses an experimental clamping device of using of nozzle air mass flow, including the clamping body, there be a plurality of the setting side by side and its axis honeycomb ducts parallel with the clamping body at the mid -mounting of cavity, it has a plurality of minutes discharge orifices to open at the upper wall of clamping body, and gas box upper end is through air inlet and outside intercommunication, and gas box lower extreme is through dividing discharge orifice and cavity intercommunication, and the nozzle runs through the local of the clamping body other end and nozzle and the cavity feeds through. A plurality of honeycomb ducts that compressed air passes through the cavity middle part form the air current that the stranded is relatively stable and the velocity of flow is not of uniform size, and stranded air current direct impact to the intercommunication part of nozzle with the cavity, make the nozzle be in the air current environment in emulation stage, convenient fluid flow to the nozzle, the atomizing tapering, detection record is carried out in state distribution etc, shorten nozzle recycle adjust the time in the experimental -> design of design -> product manufacture -> finished product testing, reduce the difference between emulation and the actual production manufacturing.

Description

A clamping device for nozzle air flow test

technical field

The utility model relates to a clamping device for fuel nozzles in special industries such as aviation and aerospace, in particular to a clamping device for nozzle air flow tests.

Background technique

my country has tested various performance parameters (oil flow, atomization cone angle, state distribution, SMD, etc.) Staying at the stage of imitation design and simulation, the input test parameters are all theoretical values under ideal conditions. In the actual product development stage, it takes a huge cost to adjust and reduce the difference between theoretical design, simulation and actual production and manufacturing repeatedly in the drawing design→product manufacturing→finished product inspection test→drawing design. Serious differences will reduce the nozzle The use requirements of the product even affect flight safety.

Utility model content

The purpose of this utility model is to provide a clamping device for nozzle air flow test, which can reduce the difference between design simulation and finished product inspection, thereby shortening the time between product design and finalization, and further reducing the development cost.

The purpose of this utility model is achieved through the following technical solutions:

A clamping device for a nozzle air flow test, comprising a clamping body with a cavity inside, and a plurality of flow guide tubes arranged side by side and whose axis is parallel to the clamping body are installed in the middle of the cavity. An air box is installed on one end of the clamping body, and a plurality of diversion holes are opened on the upper wall of the clamping body. The upper end of the air box communicates with the outside through the air inlet, and the lower end of the air box communicates with the cavity through the diversion holes, and the nozzle runs through The other end of the clamping body and part of the nozzle communicate with the cavity, and the nozzle is sealed on the clamping body through a seal and a sealing ring. When the utility model is in use, the nozzle is fixed and sealed at the end of the cavity through the sealing member and the sealing ring, and compressed air is injected into the air inlet, so that the compressed air is initially diverted through a plurality of diverter holes in the air box until the Entering the cavity, at this time, the compressed air passes through multiple guide tubes in the middle of the cavity to form multiple relatively stable airflows with different flow velocities, and the multiple airflows directly impact the connecting part between the nozzle and the cavity, so that the nozzle The airflow environment in the simulation stage facilitates the detection and recording of the nozzle’s oil flow, atomization taper, and state distribution, shortens the nozzle’s repeated cycle adjustment time in the drawing design→product manufacturing→finished product inspection test→drawing design, and reduces the simulation and The difference between actual production and manufacturing; and the flow rate and flow rate of compressed air can be adjusted in time according to the needs of actual detection, and the flow state is closer to the actual value in the simulation stage through the step-by-step stable flow distribution of the distribution hole and the draft tube. Improve the accuracy of nozzle air flow detection data.

It also includes a pressure measuring piece fixed on the upper wall of the clamping body and communicated with the cavity. The center distance between the pressure measuring piece and the nozzle is 5-15mm. The pressure measuring part is connected with the cavity area between the nozzle and the nozzle, that is, real-time detection of the final and stable simulated airflow pressure value, which is convenient for the staff to adjust the flow rate and flow rate of the compressed air in time according to the actual situation, and improve the accuracy of the nozzle detection performance parameters. Diversity makes the product simulation design closer to the parameter values of qualified finished products, greatly reducing the development cost of nozzles.

The diameter of the distribution hole is 1/4 of the diameter of the draft tube. Compressed air is injected into the air box through the air inlet, and through the pressure relief of the split hole, the air flow is injected into the cavity at a faster flow rate, and finally passes through the buffer of the end space of the cavity and guides the guide tube Under this condition, multiple streams of stable air flow are formed to move towards the nozzle, and the aperture of the diversion hole is 1/4 of the diameter of the diversion hole, so that the compressed air passes through the air box, the diversion hole, the area near the end of the cavity and the diversion tube to achieve multiple Compared with the direct jet flow, the change of the airflow state in the utility model is more complicated, and it is closer to the actual environmental conditions where the nozzle is located, and through multiple changes of direction and speed, it is sprayed from the guide tube The flocculation generated by the airflow is reduced by more than 78% compared with the turbulence confirmed by the Fluent software simulation, ensuring a good test environment for the nozzle.

The multiple distribution holes are evenly distributed on the bottom of the air box, and the total distribution area of the multiple distribution holes is 1/10-1/5 of the bottom area of the air box. Preferably, the uniform distribution of the plurality of distribution holes and the special setting of the total distribution area further reduce the floc flow generated by the air flow in the draft tube, and improve the accuracy and comprehensiveness of the nozzle detection parameters in the simulation environment.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

1. In the utility model, the compressed air passes through multiple guide tubes in the middle of the cavity to form a plurality of relatively stable airflows with different flow velocities, and the multiple airflows directly impact the connecting part between the nozzle and the cavity, so that the nozzle is in a simulated state. The airflow environment in each stage facilitates the detection and recording of the oil flow rate, atomization taper, and state distribution of the nozzle, shortens the time for repeated cycle adjustment of the nozzle in drawing design→product manufacturing→finished product inspection test→drawing design, and reduces simulation and actual production. The difference between manufacturing; and the flow rate and flow rate of compressed air can be adjusted in time according to the actual detection needs, through the step-by-step stable diversion of the diversion hole and the guide tube, the airflow state in the simulation stage is closer to the actual value, and the nozzle can be improved. The accuracy of air flow detection data;

2. The pressure measuring part of the utility model communicates with the cavity area between the nozzle and the guide tube, that is, real-time detection of the final stable simulated airflow pressure value, which is convenient for the staff to adjust the flow rate and flow rate of the compressed air in time according to the actual situation. Improve the diversity of nozzle detection performance parameters, make product simulation design closer to the parameter values of qualified finished products, and greatly reduce the development cost of nozzles;

3. The diameter of the diversion hole in the utility model is 1/4 of the diameter of the diversion hole, so that the compressed air can pass through the air box, the diversion hole, the area near the end of the cavity and the diversion tube to realize multiple reversing and speed changes, which is consistent with Compared with the direct jet flow, the change of the air flow state in the utility model is more complicated, and it is closer to the actual environmental conditions where the nozzle is located, and through multiple reversing and speed changes, the flocculate flow produced by the jet flow in the guide tube and the Through Fluent software simulation, it is confirmed that the turbulent flow is reduced by more than 78%, which ensures a good test environment for the nozzle.

Description of drawings

The drawings described here are used to provide a further understanding of the embodiments of the utility model, constitute a part of the application, and do not constitute a limitation to the embodiments of the utility model. In the attached picture:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the top view of the utility model;

Marks and corresponding component names in the attached drawings:

1-Drain pipe, 2-Air box, 3-Split hole, 4-Sealing ring, 5-Inlet, 6-Clamping body, 7-Pressure measuring part, 8-Nozzle, 9-Seal.

detailed description

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the examples and accompanying drawings. The schematic implementation of the utility model and its description are only used to explain the utility model Novelty, not as a limitation to the utility model.

Example 1

As shown in Figures 1 and 2, this embodiment includes a clamping body 6 with a cavity inside, and a plurality of flow guide tubes 1 arranged side by side and whose axes are parallel to the clamping body 6 are installed in the middle of the cavity. , an air box 2 is installed on one end of the clamping body 6, and a plurality of flow holes 3 are opened on the upper wall of the clamping body 6, and the upper end of the air box 2 communicates with the outside through the air inlet 5, and the air box 2 The lower end communicates with the cavity through the split hole 3, the nozzle 8 runs through the other end of the clamping body 6 and part of the nozzle 8 communicates with the cavity, the nozzle 8 is sealed on the clamping body 6 through the seal 9 and the sealing ring 4 . When the utility model is in use, the nozzle 8 is fixed and sealed at the end of the cavity through the sealing member 9 and the sealing ring 4, and compressed air is injected into the air inlet 5, so that the compressed air passes through multiple shunts after gathering in the air box 2 The hole 3 performs a preliminary diversion until it enters the cavity. At this time, the compressed air passes through multiple guide tubes 1 in the middle of the cavity to form multiple relatively stable airflows with different flow velocities, and the multiple airflows directly hit the nozzle 8. The connection part with the cavity makes the nozzle 8 in the airflow environment of the simulation stage, which is convenient for testing and recording the oil flow, atomization taper, state distribution, etc. of the nozzle 8, and shortens the process of the nozzle 8 in drawing design → product manufacturing → finished product inspection test →Repeated cycle adjustment time in drawing design to reduce the difference between simulation and actual manufacturing; and the flow rate and flow rate of compressed air can be adjusted in time according to the actual detection needs, through the step-by-step stability of the diversion hole 3 and the guide tube 1 The split flow makes the air flow state in the simulation stage closer to the actual value, and improves the accuracy of the air flow detection data of the nozzle 8.

Wherein, it also includes a pressure measuring part 7 fixed on the upper wall of the clamping body 6 and communicated with the cavity, and the center distance between the pressure measuring part 7 and the nozzle 8 is 5-15 mm. The pressure measuring part 7 communicates with the cavity area between the nozzle 8 and the guide tube 1, that is, real-time detection of the final and stable simulated airflow pressure value, which is convenient for the staff to adjust the flow rate and flow rate of the compressed air in time according to the actual situation, and improve the pressure of the nozzle 8. The diversity of detection performance parameters makes the product simulation design closer to the parameter values of qualified finished products, greatly reducing the development cost of nozzle 8; , so that the air flow is injected into the cavity at a faster flow rate, and finally passes through the buffer of the end space of the cavity and under the guidance of the guide tube 1, forms a plurality of stable air flows to the nozzle 8, while the split hole 3 The aperture is 1/4 of the aperture of the diversion hole, so that the compressed air passes through the air box 2, the diversion hole 3, the area near the end of the cavity, and the diversion tube 1 to achieve multiple reversing and speed changes. Compared with the direct jet , the change of the air flow state in the utility model is more complicated, and it is closer to the actual environmental conditions where the nozzle 8 is located, and through multiple reversing and speed changes, the flocculation generated by the jetting air flow in the draft tube 1 is compared with the flow through the Fluent software The simulation confirms that the turbulent flow is reduced by more than 78% compared to that, which ensures a good test environment for the nozzle 8 .

As a preference, the uniform distribution of a plurality of distribution holes 3 and the special setting of its total distribution area further reduce the floc flow generated by the air flow in the draft tube 1, and improve the accuracy and comprehensiveness of the detection parameters of the nozzle 8 in the simulation environment .

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present utility model in detail. Within the protection scope of the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (4)

1. a nozzle air flow test clamping device, comprise the clamping body (6) that cavity is offered in inside, it is characterized in that: multiple being arranged side by side and its axis mozzle (1) parallel with clamping body (6) is installed at the middle part of described cavity, described clamping body (6) one end is provided with gas box (2), multiple tap hole (3) is had at the upper wall of clamping body (6), described gas box (2) upper end is by air intake opening (5) and ft connection, gas box (2) lower end is by tap hole (3) and cavity connects, nozzle (8) runs through described clamping body (6) other end and the local of nozzle (8) and cavity connects, nozzle (8) is by seal (9), sealing ring (4) realizes the sealing on clamping body (6).

2. a kind of nozzle air flow test clamping device according to claim 1, it is characterized in that: also comprise be fixed on described clamping body (6) upper wall and with the pressure measuring piece (7) of cavity connects, described pressure measuring piece (7) is 5 ~ 15 ㎜ with the centre distance of nozzle (8).

3. a kind of nozzle air flow test clamping device according to claim 1, is characterized in that: the aperture of described tap hole (3) is 1/4 of mozzle (1) aperture.

4. a kind of nozzle air flow test clamping device according to claim 1 or 3, it is characterized in that: multiple described tap hole (3) is evenly distributed on the bottom of described gas box (2), and the total distributed area of multiple described tap hole (3) is 1/10 ~ 1/5 of the bottom area of described gas box (2).