JPH09317670A - Vane type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost by simplifying sealing structure. SOLUTION: A thin steel plate 21a is interposed between an end surface of a cam ring 1 and an end surface on the cam ring side of a side block 3, and rubbers 21b, 21c are adhered on marginal parts of both end surfaces of the thin steel plate 21a. As a strong sealing function is displayed by elastic deformation of the rubbers 21b, 21c, a complicatedly shaped O ring groove and an O ring are eliminated. As the thin steel plate 21a is used as a base material of a gasket 21, it is not necessary to apply Teflon coating to a rear side end surface of the front side block 3 and a front side end surface of a rear side block.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vane type compressor, and more particularly to a vane type compressor having a simple seal structure.

[0002]

2. Description of the Related Art FIG. 7 is a vertical sectional view of a conventional vane type compressor.

As shown in FIG. 7, this vane type compressor includes a cam ring 101, a rotor 102 rotatably housed in the cam ring 101, and a front side block 10 fixed to a front end surface of the cam ring 101.
3, the rear side block 104 fixed to the rear end surface of the cam ring 101, and the front side block 10.
Front head 105 fixed to the front side end surface of No. 3
And a rear head 106 fixed to the rear side end surface of the rear side block 104.

The cam ring 101, the front side block 103, the rear side block 104, the front head 105 and the rear head 106 have through bolts 130.
Are integrally connected with each other.

[0005]

Between the front side end surface of the cam ring 101 and the rear side end surface of the front side block 103, and between the rear side end surface of the cam ring 101 and the front side end surface of the rear side block 104, respectively, O-rings 221 and 222 are interposed as a sealing material.

FIG. 8 is a view showing the rear end surface of the front side block, and FIG. 8 is a plan view showing the O-ring.

As shown in FIG. 8, in order to mount the O-ring 221, it is necessary to form an O-ring groove 103a that draws a special curve on the rear side end surface of the front side block 103. It was difficult. In particular, it was difficult to form a groove around the through bolt 130. The same applies to the O-ring groove processing of the rear side block 104.

Further, since the O-ring groove 103a has a special shape, as shown in FIG. 8, the O-ring 221 mounted in the O-ring groove 103a also has to have a special shape, which increases the cost. It was a cause. The same applies to the rear O-ring 222.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a vane compressor capable of simplifying the seal structure and reducing the cost.

[0010]

In order to solve the above problems, a vane type compressor according to a first aspect of the invention is a rotor rotatably housed in a cam ring, and a vane provided on an outer peripheral surface of the rotor. In a vane compressor including a groove, a vane slidably inserted in the vane groove, and a side member fixed to an end surface of the cam ring, an end surface of the cam ring and an end surface of the side member on a cam ring side. A thin plate material is interposed between the thin plate material and an elastic seal portion is provided at a peripheral edge portion of the thin plate material.

Since the elastic seal portion is provided on the peripheral portion of the thin plate material and a high sealing function is exerted by elastic deformation of the elastic seal portion, the O-ring groove and the O-ring having a complicated shape are unnecessary.

A vane type compressor according to a second aspect of the invention is
In the vane type compressor according to the first aspect of the present invention, the elastic seal portion has an embossed structure.

The peripheral edge portion of the thin plate material is elastically deformed as an elastic seal portion to exert a high sealing function.

A vane type compressor according to a third aspect of the present invention is
In the vane type compressor according to claim 1 or 2,
At least a part of the end face of the thin plate on the cam ring side is processed so that the contact resistance with the end face of the rotor becomes small.

Since it is not necessary to apply Teflon coating to the end surface of the side member, the surface treatment step for the end surface of the side member can be omitted.

A vane type compressor according to a fourth aspect of the present invention is
In the vane type compressor according to the third aspect of the present invention, the processing is baking of Teflon.

Since it is not necessary to apply Teflon coating to the end surface of the side member, the surface treatment step for the end surface of the side member can be omitted.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view showing a vane type compressor according to a first embodiment of the present invention.

This vane type compressor has a cam ring 1,
A front side member (side member) 25 and a rear side member (side member) 20 respectively arranged on both end surfaces of the cam ring 1, a rotor 2 rotatably housed in the cam ring 1, and a drive shaft 7 of the rotor 2. I have it. The drive shaft 7 is rotatably supported by bearings 8 and 9.

The front side member 25 includes a front side block 3 fixed to a front end surface of the cam ring 1 via a gasket 21 described later, and a front head 5 fixed to a front end surface of the front side block 3. It is configured.

The front head 5 has a discharge port 5 for the refrigerant gas.
a is formed, and the ejection port 5 a communicates with the ejection chamber 10 formed by the front head 5 and the front side block 3.

The rear side member 20 is the cam ring 1
The rear side block 4 is fixed to the rear side end surface of the rear side block 4 via a gasket 22 described later, and the rear head 6 is fixed to the rear side end surface of the rear side block 4. The rear head 6 is formed with a refrigerant gas suction port 6a, and the suction port 6a communicates with a suction chamber 11.

Two upper and lower compression spaces 12 are defined between the inner peripheral surface of the cam ring 1 and the outer peripheral surface of the rotor 2 (only one compression space 12 is visible in FIG. 1). ). A plurality of vane grooves 13 are provided in the rotor 2, and a vane 14 is slidably inserted into these vane grooves 13. The compression space 12 is partitioned by the vanes 14 to form a plurality of compression chambers, and the volume of each compression chamber changes with the rotation of the rotor 2.

The outer peripheral wall of the cam ring 1 is provided with two discharge ports 16 corresponding to the two compression spaces 12 (only one discharge port 16 is visible in FIG. 1). Further, a valve stopper 1 is provided on the outer peripheral wall of the cam ring 1.
A discharge valve cover 17 having 7 a is fixed by bolts 18. A discharge valve 19 that opens and closes the discharge port 16 is interposed between the outer peripheral wall of the cam ring 1 and the valve stop portion 17a. When the discharge port 16 is opened, the high-pressure refrigerant gas in the compression chamber is discharged from the discharge port 5a via the discharge port 16, the passages 1a and 3a, and the discharge chamber 10.

The cam ring 1, the front side block 3, the rear side block 4, the front head 5 and the rear head 6 are integrally connected to each other by a through bolt 30 in the axial direction.

FIG. 2 is a partially enlarged view of the vane type compressor shown in FIG. 1, and FIG. 3 is a view showing a state in which a gasket is attached to the front side block as seen from the rear side (hatched portion is rubber 21b).

The gasket 21 is, for example, a thin plate (thin plate material) 21a made of a high-hardness heat-treated material such as SK material, and a rubber (elastic seal portion) 2 attached to the peripheral portion of the rear side end surface of the thin plate 21a.
1b and a rubber (elastic seal portion) 21c attached to the peripheral edge of the front end surface of the thin steel plate 21a. The gasket 22 also has a similar structure.

Rubber 21 is provided on the peripheral edge of the rear side end surface of the front side block 3, the peripheral edge of the front side end surface of the cam ring 1, and the front side end surface of the discharge valve cover 17, respectively.
Seal grooves 3b, 2b, 17b into which b, 21c are mounted are formed. The depth dimension of the seal grooves 3b, 2b, 17b is smaller than the wall thickness of the rubbers 21b, 21c. Cam ring 1 on the peripheral portion of the front end surface of the rear side block 4
Similar sealing grooves are provided on the peripheral edge of the rear side end face of the discharge valve cover 17 and on the rear side end face of the discharge valve cover 17.

Next, the operation of this vane type compressor will be described.

The rotational power of the engine (not shown) is driven by the drive shaft 7.
, The rotor 2 rotates. The refrigerant gas flowing out from the outlet of the evaporator (not shown) enters the suction chamber 11 through the suction port 6a, and is sucked into the compression space 12 from the suction chamber 11 through the suction port (not shown). The compression space 12 is partitioned by the vanes 14 to form a plurality of compression chambers, and the volume of each compression chamber changes as the rotor 2 rotates. Therefore, the refrigerant gas trapped between the vanes 14 is compressed and compressed. The discharged refrigerant gas is discharged from the discharge port 16 to the discharge valve 1
9 through the passages 1a, 3a to the discharge chamber 10,
Further, it is discharged from the discharge port 5a.

During the rotation of the rotor 2, the vanes 14 pop out or retract from the vane grooves 13. At this time, the both end surfaces of the rotor 2 and the both side surfaces of the vane 14 are attached to the gasket 2
Slide on the end faces of the cam rings 1 and 22 on the cam ring side. Since the base material of the gasket 21 is the thin plate 21a, the slidability of the rotor 2 and the vanes 14 is good.

Further, in the case of assembling the vane type compressor, when the through bolt 30 is tightened, the rubbers 21b and 21c of the gasket 21 are elastically deformed and the peripheral portion of the rear side end surface of the front side block 3 and the cam ring 1 are. A seal is made between the front side end surface and the peripheral edge portion.

According to the first embodiment, since the thin plate 21a made of the high hardness heat treatment material such as SK material is used as the base material of the gasket 21, the rear side end surface of the front side block 3 or the front side of the rear side block 3 is used. There is no need to apply Teflon coating on the end faces. Therefore, the surface treatment process of the front side block 3 and the rear side block 3 can be omitted, so that the manufacturing cost can be reduced.

The seal grooves 3b and 2b and the rubber 21 are also provided.
Since the planar shapes of b and 21c are simple, groove processing and rubber 21b and 21c can be easily manufactured, and the cost can be reduced.

FIG. 4 is an enlarged sectional view showing a part of a vane type compressor according to the second embodiment of the present invention.
FIG. 4A is a cross-sectional view showing a state where the rear end surface of the front side block is pressed against the front end surface of the cam ring, and FIG. 4B is a front view where the rear end surface of the front side block is pressed against the front end surface of the cam ring. It is a cross-sectional view showing the state of.

Portions common to the above-described embodiments are denoted by the same reference numerals, and description thereof is omitted. In the above-described embodiment, the thin plate 21a made of a high-hardness heat-treated material such as SK material is used as the thin plate material, and the rubbers 21b and 21c are used as the elastic seal portions. Using an iron-based thin plate 121a other than wood, the thin plate 1
Alternatively, Teflon may be baked on the sliding area (a part of the cylinder side end surface) 121d of the cylinder side end surface of 21a so that the peripheral edge portion of the thin plate 121a serves as an elastic seal portion to have an embossed structure.

As shown in FIG. 4B, the discharge valve cover 1
Before the rear side end face of the front side block 3 is pressed against the front side end face of 7, the embossed portion 121e of the gasket 121 has an arc shape, but as shown in FIG. When the rear end surface of the front side block 3 is pressed against the end surface, the embossed portion 121e of the gasket 121 is deformed and becomes flat, and a high sealing function is exerted by elasticity.

According to the second embodiment, since the peripheral portion of the thin plate 121a is embossed as the elastic seal portion, the rubbers 21b and 21c are unnecessary, the number of parts can be reduced, and the cost can be further reduced. it can.

As a modification of the second embodiment, if a thin plate 21a made of a high hardness heat treatment material such as SK material is used as the base material of the gasket 21, the rear end surface of the front side block 3 will be described. Since it is no longer necessary to apply Teflon coating to the front end surface of the rear side block 3, the surface treatment process of the front side block 3 and the rear side block 3 can be omitted, and the manufacturing cost can be further reduced.

FIG. 6 is an enlarged sectional view showing a part of a vane type compressor according to the third embodiment of the present invention.
FIG. 6A is a sectional view showing a state where the rear end surface of the front side block is pressed against the front end surface of the cam ring, and FIG. 6B is a front view where the rear end surface of the front side block is pressed against the front end surface of the cam ring. It is a cross-sectional view showing the state of.

As the thin plate material 321, a thin plate 321a made of a high hardness heat treatment material such as SK material is used, and as the elastic seal portion, the peripheral portion of the thin plate 321a is embossed (embossed portion 321).
In addition to e), rubber 21b, 21c may be used. This not only eliminates the need for Teflon coating, but also improves the sealing property.

[0043]

As described above, according to the vane type compressor of the present invention, since the elastic seal portion is provided on the peripheral portion of the thin plate material and the elastic seal portion is elastically deformed, a high sealing function is exhibited. The O-ring groove and the O-ring having a complicated shape are unnecessary, and the cost can be reduced.

According to the vane type compressor of the second aspect of the present invention, since the peripheral edge portion of the thin plate material is elastically deformed as an elastic seal portion to exhibit a high sealing function, the number of parts can be reduced and the cost can be reduced. Can be reduced.

According to the vane type compressor of the third or fourth aspect of the present invention, since it is not necessary to apply Teflon coating to the end surface of the side member, the surface treatment step of the end surface of the side member can be omitted. Can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a vane compressor according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged view of the vane compressor shown in FIG.

FIG. 3 is a view showing a state in which a gasket is attached to the front side block, as viewed from the rear side.

FIG. 4 is an enlarged sectional view showing a part of a vane compressor according to a second embodiment of the present invention.

FIG. 5 is a view showing a state in which a gasket is attached to the front side block as viewed from the rear side.

FIG. 6 is an enlarged sectional view showing a part of a vane compressor according to a third embodiment of the present invention.

FIG. 7 is a vertical cross-sectional view of a conventional vane compressor.

FIG. 8 is a diagram showing a rear end surface of a front side block.

FIG. 9 is a plan view showing an O-ring.

[Explanation of symbols]

 1 Cam Ring 2 Rotor 3 Front Side Block 4 Rear Side Block 5 Front Head 6 Rear Head 20 Rear Side Member 21, 121, 321 Gasket 21a, 121a, 321a Thin Plate 21b, 21c Rubber 25 Front Side Member 121e, 321e Embossing 121d Cylinder Side End Surface Sliding Motion area

Claims (4)

[Claims] 1. A rotor rotatably accommodated in a cam ring, a vane groove provided on an outer peripheral surface of the rotor, a vane slidably inserted in the vane groove, and fixed to an end surface of the cam ring. In the vane compressor including a side member, a thin plate material is interposed between an end surface of the cam ring and a cam ring side end surface of the side member, and an elastic seal portion is provided at a peripheral portion of the thin plate material. A vane type compressor characterized in that 2. The vane type compressor according to claim 1, wherein the elastic seal portion has an embossed structure. 3. The vane compression according to claim 1, wherein at least a part of the cam ring side end surface of the thin plate material is processed so that the contact resistance with the end surface of the rotor becomes small. Machine. 4. The vane compressor according to claim 3, wherein the processing is baking of Teflon.