WO2006123502A1

WO2006123502A1 - Vane for rotary compressor and method of manufacturing the same

Info

Publication number: WO2006123502A1
Application number: PCT/JP2006/308384
Authority: WO
Inventors: Osamu Akita; Hiroyuki Suzuki; Hidetoshi Arahata
Original assignee: Valeo Thermal Systems Japan Corporation
Priority date: 2005-05-20
Filing date: 2006-04-21
Publication date: 2006-11-23
Also published as: JP2006322414A

Abstract

A vane for a rotary compressor and a method of manufacturing the vane capable of effectively reducing cost for manufacturing the vane. In the vane (21) used for the rotary compressor, a land part (30) is formed at a joined part between a slidable contact face (23) in slidable contact with the inner peripheral surface of a cylinder forming a compression chamber and a side face (26) or land parts (31) and (32) are formed at joined parts between a storage face (24) stored in a vane groove formed in a rotor and side faces (25) and (26).

Description

Vane for rotary compressor and method for manufacturing the same

Technical field

TECHNICAL FIELD [0001] The present invention relates to a vane used in a rotary compressor constituting a part of an air conditioner, and more particularly to its shape and manufacturing method.

Background art

[0002] As a compressor that performs a function of compressing a refrigerant in a refrigeration cycle, a compressor called a rotary type or a vane type has been conventionally used (see Patent Document 1). The vane used in this rotary compressor is an important member that defines a compression chamber for compressing refrigerant. As a conventional technique, vanes such as C, A mixture of Si, Cr, W, Mo, V, Co, and S so as to have a predetermined composition ratio is disclosed (see Patent Document 2).

Further, as shown in FIG. 6, the vane of the rotary type compressor is made by pressing the raw material powder I with a die composed of a die 101 and punches 103 and 104 and then sintering the raw material powder I. Produced. Then, as shown in FIG. 7 (a), a flat land is formed on the tangent between the upper surface 105 and the side surfaces 106 and 107 and the tangent between the lower surface 108 and the side surfaces 106 and 107, respectively. The portions 110, 111, 112, and 113 are formed. This land portion is indispensable for reducing the load on the punches 103 and 104 in the mold forming method, and is usually set so that its width is about 0.20 mm. Then, when the material product 100 is covered with the finished product 120 shown in FIG. 7B, the side surfaces 106 and 107 of the material product 100 are lost on the land portions 110, 111, 112, and 113. Until now, polishing work was performed to cut 0.20 mm or more with a barrel or the like. Further, as the raw material of the vane currently used, aluminum, high speed steel such as Patent Document 2 mentioned above, etc. are mainly used.

Patent Document 1: Japanese Patent Application Laid-Open No. 2004-360619

Patent Document 2: JP-A-6-33200

Disclosure of the invention

Problems to be solved by the invention [0004] However, aluminum and high-speed steel used as raw materials for vanes are expensive, and polishing work to eliminate the land portion when processing vanes from raw materials to finished products is necessary. However, it took a lot of labor and cost, and this polishing work was one of the factors that caused further cost increase.

[0005] In view of the above, an object of the present invention is to effectively reduce the cost for producing vanes.

Means for solving the problem

[0006] In order to solve the above-mentioned problems, the present invention provides a vane used in a rotary compressor, wherein a contact surface between a slidable contact surface and a side surface slidably contacted with an inner peripheral surface of a cylinder defining a compression chamber. Or a land portion is present at the contact side between the storage surface and the side surface which is the surface opposite to the sliding contact surface and is stored in the vane groove formed in the rotor. (Claim 1).

[0007] This makes it possible to reduce the amount of polishing when processing the pressed and sintered raw material product into a finished product as compared with the prior art, thereby reducing the cost of manufacturing vanes.

[0008] In addition, in the configuration according to claim 1, the land portion includes, as shown in FIG. 3, a contact side 27 between the sliding contact surface 23 and the rear side surface 26 on the rear side in the traveling direction of the vane 21, It is preferably formed on the contact side 29 between the storage surface 24 and the rear side surface 26, and on the contact side 28 between the storage surface 24 and the front side surface 25 on the front side in the traveling direction of the vane 21! Claim 2).

[0009] In addition, in the configuration according to claim 1 or 2, it is preferable that the width of the land portion is 0.05 mm or less (claim 3).

[0010] Further, in the configuration according to any one of claims 1 to 3, a thinned portion may be formed (claim 4).

[0011] Thereby, even when an inexpensive iron-based material is used, light weight can be achieved.

[0012] Further, in the configuration according to claim 4, a plug member that also has rubber or a grease material strength may be fitted into the lightening portion (claim 5).

[0013] Thereby, noise caused by vane chattering can be reduced.

[0014] Further, according to the present invention, in the method for manufacturing a vane for a rotary compressor, the land portion is formed. As shown in the figure, the process A includes compressing and sintering the raw material powder of the vane, and the process B for polishing the raw material manufactured by the process A so that the land portion remains. (Claim 6).

[0015] Thereby, the land portion can be left in the finished product of the vane, and the amount of polishing can be reduced as compared with the conventional case, so that the cost can be efficiently reduced.

[0016] Further, in the configuration according to claim 6, the width of the land portion formed in the step A is 0.20 mm, and the land portion is cut in the polishing operation of the step B. Is preferably 0.15 mm or more and less than 0.20 mm (Claim 7).

Conventionally, polishing of 0.20 mm or more has been performed in the work corresponding to the polishing work of step B, but in the present invention, a minimum polishing of 0.15 mm is sufficient.

Brief Description of Drawings

[0018] FIG. 1 (a) is a side sectional view showing a structure of a rotary compressor in which a vane according to the present invention is used, and FIG. 1 (b) is a front view of the rotary compressor. It is sectional drawing.

FIG. 2 (a) is a front view of a vane according to the present invention, and FIG. 2 (b) is a left side view of the vane.

FIG. 3 is a view showing the structure of the vane contact side according to the first embodiment.

FIG. 4 (a) is a view showing the structure of the land portion on the sliding contact surface side of the vane according to the first embodiment.

FIG. 4B is a diagram illustrating the structure of the land portion on the storage surface side of the vane according to the first embodiment.

FIG. 5 is a view showing a structure of a vane according to a second embodiment.

FIG. 6 is a diagram showing a general method for producing a vane.

[Fig. 7] Fig. 7 (a) is a diagram showing the structure of the tangent side of the conventional vane material, and Fig. 7 (b) is a diagram showing the structure of the tangent side of the finished product of the conventional vane. is there.

Explanation of symbols

[0019] 1 Rotary compressor

2 cylinder

3 Front block

4 Rear block

5 Front side block 7 Cylinder space

9 Rotor

12 Suction chamber

13 Discharge chamber

17 Shaft

18 Compression chamber

20 Vane groove

21, 50 Vane

23 Sliding surface

24 Storage surface

25 forefront

26 backside

30, 31, 32 Land

51 Meat extraction part

52 Plug member

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. A rotary compressor (hereinafter abbreviated as a compressor) 1 shown in FIGS. 1 (a) and 1 (b) constitutes a part of a vehicle air conditioner, and usually uses a clutch engine or a traveling engine or It is connected to the electric motor and has the effect of compressing the refrigerant gas flowing out of the evaporator in the refrigeration cycle and sending it out to the condenser.

[0021] The compressor 1 is configured by assembling a cylinder 2, a front block 3, a rear block 4, and a front side block 5, and the cylinder 2 has a substantially elliptical cylinder space 7, and this cylinder space A true circular rotor 9 that contacts a part of the inner peripheral surface 10 of the cylinder space 7 is disposed in the cylinder 7. The rotor 9 rotates in the direction of arrow A in the figure, and the cylinder space 7 is partitioned into two cylinder spaces 7a and 7b by the rotor 9. Two suction ports 12 and two discharge ports 13 are formed in the vicinity of the portion of the inner peripheral surface 10 of the cylinder 2 in contact with the rotor 9. The suction port 12 is formed at the inlet portion of the two cylinder spaces 7a and 7b. 3 is formed in the exit part of two cylinder space 7a, 7b. Discharge valve 14 is installed at discharge port 13!

The rotor 9 is formed with a fitting hole 19 into which the shaft 17 is inserted at the center thereof, and is inclined at a predetermined angle from the center toward the rotation direction A side and extends in a substantially radial direction. A groove 20 is formed. A vane 21 is slidably inserted into each of the vane grooves 20, and each vane 21 corresponds to the pressure in the back pressure chamber 22 formed at the center side end of the vane groove 20 and the rotor. Due to the centrifugal force of 9, the tip protrudes and contacts the inner peripheral surface 10 side. As a result, a plurality of compression chambers 25 are defined in the cylinder space 7.

[0023] The shaft 17 is inserted into the fitting hole 19 of the rotor 9, is rotatably supported by radial bearings 27, 28 provided in the front side block 5 and the rear block 4, and is external to the shaft seal 29. An electromagnetic clutch mechanism (not shown) is connected to the tip 17a that protrudes toward the bottom.

[0024] Inside the front block 3, a high-pressure refrigerant passage and a high-pressure chamber 32 having an oil separation function are formed, and the high-pressure chamber 32 communicates with an opening for discharging the high-pressure refrigerant to an external mechanism. Yes. The front side block 5 has a flat surface on the cylinder 2 side, a through hole 34 through which the shaft 17 is inserted in the center, and two arc-shaped back pressure grooves 35a and 35b are formed in the periphery of the through hole 34. . High pressure oil is supplied to the back pressure grooves 35a, 35 from an oil reservoir 37 through oil supply holes formed in the front side block 5.

A suction chamber 40 is formed between the rear block 4 and the cylinder 2, and the suction chamber 40 communicates with an external mechanism via a check valve 41. An insertion hole 43 into which the shaft 17 is inserted is formed at the center of the rear block 4, and two arc-shaped back pressure grooves 45a and 45b are formed at symmetrical positions around the insertion hole 43. The back pressure grooves 45a and 45b are also filled with oil that has flowed through the back pressure chamber 22 formed in the rotor 9.

In the compressor 1 configured as described above, when the rotor 9 rotates, the vane 21 slides along the inner peripheral surface 10 and moves the compression chamber 25 from the suction chamber 12 to the discharge chamber 13 while reducing its volume. Move. This fulfills the function of pumping the refrigerant.

Example 1

The vane 21 according to the present embodiment has the structure shown in FIGS. Fig. 2 (a), As shown in (b), the vane 21 includes a sliding contact surface 23 that is in sliding contact with the inner peripheral surface 10 of the cylinder 2, a storage surface 24 that is stored in the vane groove 20 of the rotor 9, and a traveling direction of the vane 21 (rotor 9 Rotation direction A) It has a front side surface 25 on the front side and a rear side surface 26 on the rear side in the traveling direction of the vane 21. In this embodiment, the slidable contact surface 23 has an R shape inclined so that the upper end force of the front side surface 25 gradually decreases toward the upper end of the rear side surface 26, and the storage surface 24 has a substantially perfect semicircle shape.

[0028] As shown in FIG. 3, a land portion 30 is present at a contact side 27 between the sliding contact surface 23 and the rear side surface 26, and a contact side 28 between the storage surface 24 and the front side surface 25, In addition, land portions 31 and 32 exist at the contact side 29 between the storage surface 24 and the rear side surface 26, respectively.

[0029] The finished product of the vane 21 is manufactured by performing barrel polishing or the like on a material product manufactured by pressing and sintering with a punch. When the above-mentioned land portions 30, 31, 32 are barrel-polished, as shown in FIGS. 4 (a) and (b), the width D 2 (D2 By polishing only D1), it is formed by leaving the force on the finished product with the land part 30 and 31 of width D3 (same for the land part 32) (D1: land width of the material, D2: Polishing width, D3: Land width of the finished product). Specifically, it is preferable that D1 O. 20 (mm), D2 = 0.15 (mm), D3 = 0.05 (mm).

[0030] With the above-described configuration, the amount of polishing of the raw material can be reduced as compared with the conventional case, so that the cost for producing vanes can be efficiently reduced.

Example 2

A vane 50 according to the present embodiment shown in FIG. 5 is one in which a lightening portion 51 is formed in addition to the configuration of the land portion. As a result, even when an inexpensive iron-based material is used, it is possible to reduce the weight sufficiently. In addition, a plug member 52 made of rubber or grease may be inserted into the cutout portion 51. Thereby, noise due to chattering can be reduced.

Claims

The scope of the claims

[1] In vanes used in rotary compressors,

On the contact side between the sliding contact surface and the side surface slidably contacting the inner peripheral surface of the cylinder defining the compression chamber, or on the contact side between the storage surface and the side surface stored in the vane groove formed in the rotor, A rotary compressor vane characterized by the presence of a land!

[2] The land portion includes a contact side between the sliding contact surface and a rear side surface on the rear side in the traveling direction of the vane, a contact side between the storage surface and the rear side surface, and a front side in the traveling direction of the storage surface and the vane. 2. The vane for a rotary compressor according to claim 1, wherein the vane is formed on a side border with the front side surface.

[3] The rotary compressor vane according to claim 1 or 2, wherein the land portion has a width of 0.05 mm or less.

[4] The rotary compressor vane according to any one of claims 1 to 3, wherein a lightening portion is formed.

5. The rotary compressor vane according to claim 4, wherein a plug member made of rubber or a resin material is fitted into the lightening portion.

[6] Step A of compressing and sintering the vane raw material powder so that the land portion is formed, and a step of polishing the material product produced by the step A so that the land portion remains. ,

A method for manufacturing a vane for a rotary compressor, comprising:

[7] The width of the land portion formed in the step A is 0.20 mm,

7. The method for producing a vane for a rotary compressor according to claim 6, wherein a width of a land portion to be cut in the polishing operation in the step B is 0.15 mm or more and less than 0.20 mm.