KR100472213B1 - Fluid machinery - Google Patents

Abstract

The present invention relates to a fluid machine, comprising a roller (10) having a spiral groove (10f) and rotating an eccentric position in a cylinder (11), and a spiral blade (15) freely fitted in the spiral groove. And a motor portion 4 having a fluid mechanism portion 2 and a motor 5 for driving the rollers of the fluid mechanism portion by a rotation shaft 3, the main portion supporting the cylinder 11 and the rotation shaft 3. The bearing 8 and the sub-bearing 12 are configured such that at least a part of the outer surface thereof is exposed to the outside, and is characterized by providing a fluid machine that is easy to manage by heat dissipation without using lubricant.

Description

Fluid Machinery {FLUID MACHINERY}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to fluid machines, such as helical blade compressors and pumps, in particular semi-hermetic fluid machines without lubricating oil.

Conventionally, as an example of this kind of helical blade type compressor, it is known to be used for refrigeration cycle apparatuses, such as an air conditioner and a refrigerator. This conventional compressor has a helical blade type compression mechanism, which is a fluid mechanism for compressing fluid such as refrigerant, and a motor driving the compression mechanism in a sealed case containing lubricating oil, and stores the refrigerant compressed by the compression mechanism. It is configured to discharge partly in the inside and then to discharge in a refrigeration cycle.

Therefore, in the said compressor, the lubricating oil can perform lubrication and cooling of a fluid mechanism part together.

However, such a conventional compressor is unreasonable that it is difficult to dissipate the compression mechanism without using lubricating oil. For this reason, there exists a problem that the said compressor cannot be used for the use which cannot use a lubricating oil.

The present invention has been made in view of such circumstances, and an object thereof is to provide a fluid machine capable of heat dissipation and easy maintenance without using lubricant.

The present invention includes a fluid mechanism having a spiral groove and a roller rotating in an eccentric position in a cylinder, and a spiral blade freely fitted in the spiral groove, and a motor for rotating the roller of the fluid mechanism by a rotating shaft. A fluid machine equipped with a motor unit, wherein the bearing supporting the cylinder and the rotating shaft is configured such that at least a part of its outer surface is exposed to the outside.

According to the present invention, since at least a part of the outer surfaces of the cylinder and the bearing are exposed to the outside, the amount of heat radiation radiated from the exposed outer surface can be increased. For this reason, since the heat dissipation can be performed without using lubricating oil, the fluid machine can also be used for applications that do not use lubricating oil.

According to the present invention, the motor unit includes a case in which at least a part of the motor is embedded, and forms a fluid suction hole in the case, while the bearing includes a main bearing and a part for supporting the rotation shaft at both ends in the axial direction of the roller, respectively. And a fluid discharge hole in the sub-bearing or the cylinder.

According to the present invention, since the fluid is sucked into the case from the fluid suction hole of the case of the motor part and the fluid is discharged from the fluid discharge hole of the cylinder or the bearing to the outside, the fluid passes inside the fluid machine. Can be cooled. For this reason, the cooling effect of the fluid machine can be further improved.

This invention is the fluid machine of Claim 2 in which the said roller forms the fluid suction hole so that the space inside and outer peripheral surface side may communicate in radial direction.

According to the present invention, since the fluid suction holes of the roller communicate with each other in the radial direction of the inner and outer peripheral surface side of the roller, the inner and outer peripheral surfaces of the roller can be cooled by passing the fluid through the fluid suction holes. For this reason, the cooling effect of the fluid machine can be further improved.

The present invention is a fluid machine, characterized in that the rotating shaft forms a fluid passage for communicating the fluid in the case by communicating with spaces at both ends in the axial direction of the motor.

According to the present invention, the fluid introduced into the casing from the fluid suction hole passes through the fluid passage of the rotating shaft, whereby the rotor, the stator, and the like fixing the rotating shaft and the rotating shaft can be cooled.

According to the present invention, at least one of the cylinder, the main bearing, and the sub-bearing is formed of an aluminum-based material, and the cylinder is a fluid machine characterized in that a heat radiation fin is formed on an outer circumferential surface thereof.

According to the present invention, since the cylinder and the bearing are formed of a lightweight aluminum-based material having high heat dissipation effect, both the further improvement and the weight reduction of the cooling effect of the cylinder and the bearing can be achieved. Moreover, since the heat radiation fin is provided on the outer peripheral surface of the cylinder, further cooling effect of the cylinder can be improved.

The present invention is a fluid machine, characterized in that the motor unit is configured such that at least a part of the outer surface of the stator of the motor is exposed to the outside.

According to the present invention, since at least a part of the outer surface of the motor stator is exposed to the outside, the amount of heat radiation radiated to the outside from the exposed portion can be increased. For this reason, the cooling effect of the fluid machine can be further improved.

The present invention is a fluid machine characterized in that the joint portion between the cylinder and the bearing, or the stator portion between the motor and the bearing portion is joined by a joint of a faucet joint.

According to the present invention, the joint between the cylinder and the bearing, or the joint between the motor stator and the bearing is joined by a faucet, so that the airtightness of these joints can be improved, and the workability of positioning and assembly can be improved.

The present invention is a fluid machine, characterized in that the bearing is formed with a blind hole (sliding hole) to receive the shaft end portion of the rotating shaft freely.

According to the present invention, since the sliding hole for accommodating the shaft end of the rotating shaft is a fixed hole, the step of closing one end of the sliding hole by a blind patch or the like can be omitted.

The present invention is a fluid machine, characterized in that the roller forms the spiral grooves at equal pitch.

According to the present invention, since the spiral groove of the roller is an equal pitch, the spiral blade inserted into the spiral groove also becomes an equal pitch, and since the spiral inclination angle of the blade can be reduced, the swing deformation of the blade can be reduced to improve durability. have.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on FIG. 1 and FIG. In addition, the same code | symbol is attached | subjected to the same or corresponding part in these drawings.

1 is a longitudinal cross-sectional view of a fluid machine 1 according to one embodiment of the present invention. As shown in FIG. 1, the fluid machine 1 is a preferred fluid machine when used as a compressor or a pump of a refrigeration cycle device such as an air conditioner or a refrigerator.

The fluid machine 1 includes a fluid mechanism part 2, such as a compressor mechanism for compressing a fluid such as a refrigerant, or a pump mechanism for pumping fluid from an inlet port described later to a discharge port, and a rotational force of the rotation mechanism 3 of the fluid mechanism part 2. The motor part 4 which drives by is provided.

The motor part 4 accommodates the motor 5 in the cylindrical case 6 with a cover, and the case 6 is attached to the cover part of the axial end (left end in FIG. 1) of the case 6. ), A suction pipe 7 is connected to the inside. The motor 5 fixes the stator 5a to a disk-shaped main bearing 8 made of an aluminum-based material which is a part of the bearing. In addition, the flange of the open end of the case 6 is tightly fastened to the outer peripheral edge of one surface (left side in FIG. 1) of the main bearing 8 by bolting or the like. Moreover, the main bearing 8 forms the bearing part 8a which penetrates the rotating shaft 3 concentrically fixed to the rotor 9 of the motor 5 at the center part in the axial direction, and the said bearing part ( 8a) is formed in the bearing part 8a which supports the rotation shaft 3 freely. In addition, the main bearing 8 is provided with the fluid through-hole 8b which penetrates in the axial direction rather on the outer peripheral side rather than the bearing part 8a.

The axial opening of the cylindrical cylinder 11 made of an aluminum-based material freely eccentrically rotates (rotates) the cylindrical roller 10, which will be described later, on the rear surface (right side in FIG. 1) of the main bearing portion 8. One end is secured by bolts or the like. At the other end in the axial direction of the cylinder 11 (the right end in Fig. 1), a disk-shaped sub bearing 12 made of an aluminum-based material which is a part of the bearing is hermetically fastened by bolting or the like.

The roller 10 has a cylindrical roller main body 10a in which a portion of the outer circumferential surface is rotated in close proximity to the cylindrical inner circumferential surface of the cylinder 11, and an inner surface of the roller body 10a in the axial direction middle portion. Disk-shaped ribs 10b which are integrally connected to each other, and the ribs 10b are provided with sliding holes 10c fitted to the crank portions 3a of the rotary shaft 3, and the rollers (10) rotates (revolves) in the cylinder 11 the position which eccentrically predetermined amount e with respect to the center axis | shaft 0 of the rotating shaft 3 is carried out. Moreover, the rib 10b is provided in the outer peripheral side of the sliding hole 10c with the fluid passage hole 10d of the required diameter penetrating in the axial direction.

The roller 10 has a fluid suction hole that penetrates from the inner circumferential surface to the outer circumferential surface from the inner circumferential surface thereof to the outer circumferential surface thereof (diameter direction) at the main bearing 8 side end of the roller body 10a. 10e is provided.

Moreover, the Oldham mechanism 13 which rotates (or idles) in an eccentric position and regulates the rotation of the said roller 10 is provided in the roller 10 and the sub-bearing 12. As shown in FIG.

The sub-bearing 12 is provided with a communication hole (not shown) which communicates with the fluid discharge chamber (not shown) of the cylinder 11, and a discharge tube 14 which communicates with the communication hole. It is made to discharge a fluid etc. in a cycle.

The roller 10 is provided with a spiral groove 10f on the outer circumferential surface of the roller body 10a. The pitch of the spiral groove 10f may be formed so as to gradually decrease from the fluid suction hole 10e toward the discharge tube 14 side, and may be configured to perform a compression action, or may be formed at an equal pitch to perform a pump action. You may also The helical spiral blade 15 having elasticity is freely fitted to the spiral groove 10f, and the inner circumferential surface of the cylinder 11 and the outer surface of the roller 10 are wound in accordance with the winding interval of the spiral blade 15. A space in which the annular gap is hermetically sealed is partitioned along the axial direction of the roller 10 in the plurality of compression chambers 16 for compressing the fluid.

Therefore, when both the rotor 9 and the rotating shaft 3 rotate by the energization of the motor part 4, and the crank part 3a of the rotating shaft 3 rotates eccentrically, it will be able to slide to the said crank part 3a freely. The roller body 10a fitted from the outside rotates the eccentric position in the cylinder 11, and the fluid in the plurality of compression chambers 16, which is partitioned by the spiral blades 15, flows from the fluid suction hole 10e side. It is compressed while being continuously conveyed toward the discharge port 10f side, and is discharged from the discharge pipe 14 to the outside of a refrigerating cycle or the like through the fluid discharge chamber.

As a result, since the inside of the compression chamber 16 in the cylinder 11 becomes a negative pressure, fluid such as refrigerant from the refrigerating cycle is sucked into the case 6 from the suction pipe 7 and the outer peripheral surface of the motor stator 5a. Flows in the axial direction to the right in Fig. 1 toward the fluid suction hole 10e, passes through the fluid through-hole 8b of the main bearing 8, and flows into the inner surface side of the roller body 10a, and further fluid therefrom. The suction hole 10e is sucked into the compression chamber 16 one by one, and is compressed again in order as described above, and then pumped to the discharge tube 14 side and discharged from the fluid discharge tube 14, which is repeated hereafter.

As described above, when the crank portion 3a of the rotating shaft 3 rotates eccentrically in the sliding hole 10c of the roller 10, the roller body 10a is intended to rotate by the frictional force with the crank portion 3a. However, the rotation is regulated by the Oldham mechanism 13 and converted into an orbital motion.

Accordingly, the fluid machine 1 exposes at least a portion of the outer surfaces of the cylinder 11, the main bearing 8, and the sub-bearing 12 to the outside, thereby increasing the amount of heat radiation radiated from the exposed outer surface. Can be. For this reason, since the heat dissipation can be carried out without using lubricating oil, the fluid machine 1 can also be used for applications that do not use lubricating oil.

In addition, when a fluid such as a refrigerant is sucked into the case 6 from the suction pipe 7 of the case 6 of the motor part 4 and discharged to the outside from the discharge pipe 14 of the sub-bearing part 12. Since the fluid passes through almost the entire length within the fluid machine 1, the fluid can cool the interior of the fluid machine 1. For this reason, the cooling effect of the fluid machine 1 can be improved further.

In addition, since the fluid suction holes 10e of the roller 10 communicate with each other in the radial direction of the outer peripheral surface side spaces of the roller main body 10a, the fluid passes through the fluid suction holes 10e so that the fluid suction holes 10e of the rollers 10a The outer peripheral surface can be cooled. For this reason, the cooling effect of the fluid machine 1 can be improved further.

In addition, since the cylinder 11, the main bearing 8, and the sub bearing 12 are formed of an aluminum-based material having a high heat dissipation effect and a light weight, the cylinder 11, the main bearing 8, and the sub bearing 12 are formed. Further cooling effect and weight reduction can be achieved.

FIG. 2 is a longitudinal sectional view of the fluid machine 1A according to the second embodiment of the present invention, wherein the fluid machine 1A increases the external exposure surface area mainly exposed to the outside with respect to the fluid machine 1, thereby providing a cooling effect. It is a main feature in that further improvement is achieved. That is, the fluid machine 1A enlarges the outer diameter of the motor stator 5a with respect to the fluid machine 1 to form a large diameter stator 5b, and the axial end of the large diameter stator 5b ( In Fig. 2, the flange 4b of the open end of the case 6a having a shorter shaft length than the case 6 and smaller than the case 6 is fastened and fixed with a fastening bolt or the like to obtain a large diameter stator 5b. ) The outer circumferential surface is exposed to the outside.

Further, one end (left side in FIG. 2) of the cylindrical portion 8c made of aluminum-based material is concentric on one surface (left side in FIG. 2) of the outer peripheral portion of the disc-shaped main bearing 8 made of aluminum-based material. It is integrally formed in the shape and is achieved integrally with the bottomed cylindrical main bearing 8d, and the outer peripheral surface of the cylindrical part 8c of the cylindrical main bearing 8d is exposed to the outside.

In addition, the plurality of heat dissipation fins 11c are integrally arranged on the outer circumferential surface of the cylinder 11 by arranging the plurality of grooves 11b at a predetermined pitch in the axial direction on the outer circumferential surface of the cylindrical cylinder 11 made of the aluminum-based material. The cooling effect of the cylinder 11 is improved by increasing the surface area where the outer surface of the cylinder 11 is exposed to the outside by these heat radiating fins 11c.

Further, the rotary shaft 3 is provided with a communication hole 3b having a required diameter, which is a fluid passage that communicates the space between the axial ends of the motor rotor 9a (both left and right ends in FIG. 2). The communication hole 3b is opened at its shaft end at a fixed side end (left end in Fig. 2) of the rotating shaft 3 fixed to the motor rotor 9a, and is provided with a required length in the axial direction at the shaft center. A hole 3b1 and a horizontal hole 3b2 radially installed from the right end of FIG. 2 of the longitudinal hole 3b1 and opened at an outer circumferential surface thereof, which is short and small from the suction pipe 7 in the case 6a. The suctioned fluid is guided through the connecting hole 3b to the cylindrical main bearing 8d side space.

Then, the joining portion J of the cylinder 11 and the cylindrical main bearing 8d, the joining portion J of the large diameter stator 5b and the cylindrical main bearing 8d, the cylinder 11 and the sub-bearing ( Since the faucet joint part for joining the junction part J of 12) by a faucet joint is formed, the airtightness of these junction part J can be improved. In addition, since the projections and the convex portions to be hermetically fitted to the joints J are formed in advance in the joints J, the workability of positioning and assembly of these joints can be improved.

Further, a plurality of balancers 17 are fixed to the rotary shaft 3 from the outside in the axial direction of the crank portion 3a from outside to facilitate the rotational movement of the rotary shaft 3. Moreover, the sub-bearing part 12a forms the sliding hole 12b which supports the shaft end part of the rotating shaft 3 freely as a bottomed hole, ie, a fixed hole.

Therefore, according to the fluid machine 1A, the fluid introduced into the short and small case 6a from the suction pipe 7 passes through the communication hole 3b, which is the fluid passage of the rotating shaft 3, so that the rotating shaft 3 and the The rotor 9, the stator 5b, etc. which hold | maintain the rotating shaft 3 can be cooled.

Moreover, since the some heat dissipation fin 11c is provided in the outer peripheral surface of the cylinder 11, further cooling effect of the cylinder 11 can be aimed at.

Moreover, since at least a part of the outer peripheral surface of the motor stator 5b is exposed to the outside, the amount of heat radiation radiated to the outside from the exposed portion can be increased. For this reason, the cooling effect of the fluid machine 1A can be further improved.

In addition, since the sliding hole 12b of the sub-bearing 12a which accommodates the shaft end of the rotating shaft 3 is a blind hole, the process of closing one end of the sliding hole 12b with a blind patch etc. can be skipped.

In addition, when the spiral groove 10f of the roller 10 is equal pitch, the spiral blade 15 fitted into the spiral groove 10f also becomes equal pitch, so that the spiral inclination angle of the blade 10 can be reduced. The durability of the blade can be improved by reducing the swing deformation of the blade.

As described above, according to the present invention, since at least a part of the outer surfaces of the cylinder and the bearing are exposed to the outside, the amount of heat radiation radiated from the exposed outer surface can be increased. For this reason, since the heat dissipation can be performed without using lubricating oil, the fluid machine can also be used for applications that do not use lubricating oil.

1 is a longitudinal sectional view of a fluid machine according to a first embodiment of the present invention;

2 is a longitudinal sectional view of a fluid machine according to a second embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

1,1A: Fluid machine 2: Fluid mechanism part

3: rotating shaft 3a: crank portion of rotating shaft

4: motor part 6: case

7: suction line 8: main bearing

10: roller 11: cylinder

12: sub-bearing 14: discharge tube

15: spiral blade 16: operating chamber

Claims (12)

A fluid mechanism having a spiral groove and a roller for rotating an eccentric position in a cylinder, and a spiral blade freely fitted in the spiral groove, and a motor portion having a motor for rotationally driving the roller of the fluid mechanism by a rotating shaft. In one fluid machine, And a bearing for supporting the cylinder and the rotating shaft such that at least some of their outer surfaces are exposed to the outside. The method of claim 1, The motor unit includes a case in which at least a part of the motor is embedded, and forms a fluid suction hole in the case, while the bearing has a main bearing and a sub-bearing respectively supporting the rotating shaft on both sides in the axial direction of the roller. And a fluid discharge hole formed in at least one of the sub-bearing and the cylinder. The method of claim 2, And the roller has a fluid suction hole so that the inner and outer circumferential side spaces communicate with each other in the radial direction. The method of claim 2 or 3, And said rotating shaft forms a fluid passage for communicating the fluid in said casing by communicating spaces at both ends in the axial direction of said motor. The method of claim 2 or 3, At least any one of the cylinder, the main bearing, and the sub-bearing is formed of an aluminum-based material, and the cylinder has a heat radiating fin formed on an outer circumferential surface thereof. delete The method of claim 1, And wherein the motor portion is configured such that at least a portion of an outer surface of the stator of the motor is exposed to the outside. The method of claim 1, And at least one of the joint portion of the cylinder and the bearing and the joint portion of the stator of the motor and the bearing are joined by a faucet joint. The method of claim 1, And the bearing is formed by a blind hole with a sliding hole for freely receiving the shaft end of the rotating shaft. delete The method of claim 1, And said roller forms said spiral grooves at equal pitch. delete