JP2002221176A - Vane-type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vane-type compressor capable of preventing remarkable abrasion and seizure of a sliding part even when the quantity of lubricating oil contained in a refrigerant flowing in the compressor is short. SOLUTION: An oil introduction passage 25 to lead the lubricating oil in a discharge chamber 14 to a low pressure introduction passage 28 is formed on a front side member 4 in the vane-type compressor furnished with a cam ring 1, the front side member 4 and a rear head fixed on both ends of the cam ring 1, a rotor 2 to be stored in the cam ring 1 free to rotate, a plurality of vanes to be inserted in a plurality of vane grooves of the rotor 2 free to slide, a compression chamber formed between the vanes before and behind in the rotating direction of the rotor 2 and the low pressure introduction passage 28 passing the cam ring 1 in the axial direction and introducing a part of the refrigerant gas of low pressure introduced from the rear side of the cam ring 1 to the compression chamber from the front side of the cam ring 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vane type compressor.

[0002]

2. Description of the Related Art FIG. 10 is a longitudinal sectional view of a conventional vane type compressor, FIG. 11 is a front end view of a front side block and a cam ring when a front head is removed, and FIG.
2 is a front end view of the cam ring.

[0003] The vane type compressor has a cam ring 301.
A rotor 302 rotatably accommodated in the cam ring 301; a front side member 304 fixed to the front side of the cam ring 301;
And a rear head 303 as a rear side member fixed to the rear side of the vehicle.

[0004] A plurality of vane grooves 308 are formed on the outer peripheral surface of the rotor 302 along the circumferential direction.
A vane 309 is slidably inserted into the reference numeral 08. A compression chamber 310 is formed between the vanes 309.

The front side member 304 is provided with a discharge chamber 314 for accommodating high-pressure refrigerant gas and an oil separator 319 for separating lubricating oil contained in the refrigerant gas.

[0006] The rear head 303 is provided with a suction chamber (not shown) for accommodating a low-pressure refrigerant gas.

[0007] The cam ring 301 is provided with a low-pressure introduction passage 328 penetrating in the axial direction. Low pressure introduction passage 32
Reference numeral 8 denotes a passage for guiding a part of the refrigerant gas in the suction chamber to the front side of the compression chamber 310. Also, the cam ring 301
Suction ports 329a,
329b are provided respectively.

When the rotor 302 rotates, the vanes 309
Slides on the inner peripheral surface 301c of the cam ring 301. As the rotor 302 rotates, the refrigerant gas in the suction chamber flows into the compression chamber 310 via the suction port 329b, and a part of the refrigerant gas in the suction chamber is supplied to the low pressure introduction passage 328.
Through the suction port 329a and into the compression chamber 310. After the refrigerant gas in the compression chamber 310 is compressed, it flows into the discharge chamber 314, and the lubricating oil in the refrigerant gas is separated by the oil separator 319. Then, refrigerant gas containing no lubricating oil is discharged from the discharge port 317 to the condenser side of the refrigeration system.

[0009]

However, when the oil separator 319 is employed, the amount of lubricating oil contained in the refrigerant gas flowing into the compressor is insufficient, so that lubricating oil such as the tip of the vane 309 is required. There is a problem that remarkable wear or seizure may occur on the sliding portion.

[0010] The present invention has been made in view of such circumstances, and its object is to remarkably wear or seize the sliding portion even if the amount of lubricating oil contained in the refrigerant flowing into the compressor is insufficient. It is to provide a vane type compressor capable of preventing the occurrence of the above problem.

[0011]

According to a first aspect of the present invention, there is provided a vane-type compressor comprising: a cam ring; two side members fixed to both ends of the cam ring; A rotatable housing, a plurality of vanes slidably inserted into a plurality of vane grooves of the rotor, and a compression chamber formed between the vanes in front and behind the rotation direction of the rotor. A low-pressure introduction passage that penetrates the cam ring in the axial direction and guides a part of the low-pressure refrigerant gas introduced from one end of the cam ring to the compression chamber from the other end of the cam ring. And an oil introduction passage formed in at least one of the two side members and guiding the lubricating oil separated in the high-pressure space to the low-pressure introduction passage. .

As described above, at least one of the two side members is provided with the oil introduction passage for guiding the lubricating oil separated in the high-pressure space to the low-pressure introduction passage. It flows into the passage and is sucked into the compression chamber together with the refrigerant gas.

According to a second aspect of the present invention, in the vane compressor according to the first aspect of the present invention, a part of an outlet side opening of the oil introduction passage faces the low pressure introduction passage, and the remaining portion is other than the cam ring. It is characterized by facing the end face.

As described above, a part of the opening on the outlet side of the oil introduction passage faces the low-pressure introduction passage, and the remaining portion faces the other end surface of the cam ring. The flow is restricted, and the amount of lubricating oil flowing into the low-pressure introduction passage is limited. Therefore, when the side member is machined, it is not necessary to machine the oil introduction passage with a very small diameter, so that deburring in the oil introduction passage is facilitated.

According to a third aspect of the present invention, in the vane type compressor according to the first aspect of the present invention, a hole is formed in the other end surface of the cam ring or the cam ring side end surface of the one side member to communicate with the low-pressure introduction passage. The outlet opening of the oil introduction passage faces the hole.

As described above, a hole communicating with the low-pressure introduction passage is formed in the other end surface of the cam ring or the cam ring-side end surface of one of the side members, and the outlet side opening of the oil introduction passage faces the hole. The area is reduced, the flow of the lubricating oil is restricted, and the amount of the lubricating oil flowing into the low-pressure introduction passage is limited. Therefore, when the side member is machined, it is not necessary to machine the oil introduction passage with a very small diameter, so that deburring in the oil introduction passage is facilitated.

According to a fourth aspect of the present invention, there is provided a vane type compressor.
A cam ring, two side members fixed to both ends of the cam ring, a rotor rotatably housed in the cam ring, and a plurality of vanes each slidably inserted into a plurality of vane grooves of the rotor. A compression chamber formed between the vanes that are in front of and behind the rotation direction of the rotor, and a portion of the low-pressure refrigerant gas that penetrates the cam ring in the axial direction and is introduced from one end of the cam ring. A vane-type compressor having a low-pressure introduction passage leading from the other end to the compression chamber; and guiding lubricating oil formed in at least one of the two side members and separated in the high-pressure space to the compression chamber. It is characterized by having an oil introduction passage.

As described above, at least one of the two side members has an oil introduction passage for guiding the lubricating oil separated in the high-pressure space to the compression chamber. It flows into the passage and is sucked into the compression chamber together with the refrigerant gas.

According to a fifth aspect of the present invention, in the vane type compressor according to the fourth aspect of the present invention, a part of an outlet side opening of the oil introduction passage faces the compression chamber, and the remaining part is the other end face of the rotor. It is characterized by being facing.

As described above, a part of the opening on the outlet side of the oil introduction passage faces the compression chamber, and the remaining part faces the other end surface of the rotor. Therefore, the area of the oil introduction passage is reduced, and the flow of the lubricating oil is reduced. The amount of the lubricating oil that is throttled and flows into the low-pressure introduction passage is limited. Therefore, when the side member is machined, it is not necessary to machine the diameter of the oil introduction passage so much that the deburring in the oil introduction passage becomes easy.

[0021]

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

FIG. 2 is a longitudinal sectional view of the vane type compressor according to the first embodiment of the present invention, and FIG. 1 is a view for explaining the vane type compressor. FIG. FIG. 3B is a partially enlarged perspective view of the cam ring, FIG. 3 is a front end view of the front side block, and FIG. 4 is a front end view of the cam ring. .

This vane type compressor has a cam ring 1,
Rotor 2 rotatably housed in cam ring 1
A rear head 3 as a rear side member disposed on the rear end surface 1b of the cam ring 1; and a front side member 4 disposed on the front end surface 1a of the cam ring 1.
And a shaft 6 of the rotor 2.

A plurality of vane grooves 8 are formed on the outer peripheral surface of the rotor 2 at predetermined intervals along the circumferential direction of the rotor 2. A vane 9 is slidably inserted into each vane groove 8. A compression chamber 10 is formed between the vanes 9 which are in front and behind the rotation direction of the rotor 2.

The rear head 3 has a suction port (not shown), a suction chamber (not shown) for accommodating the refrigerant gas flowing from the suction port, and a discharge port for discharging the refrigerant gas out of the compressor. 17 are formed.

The front side member 4 comprises a front head 11 and a front side block 12.

The front side member 4 includes a discharge chamber (high-pressure space) 14 for accommodating high-pressure refrigerant gas discharged from the compression chamber 10 and a part of a discharge passage 18 for guiding the refrigerant gas to a discharge port 17. Is formed. A cylindrical oil separator 19 is provided in the middle of the discharge passage 18. The oil separator 19 is for separating lubricating oil from refrigerant gas.

The front side block 12 is fixed to the front end face 1a of the cam ring 1 with bolts (not shown).

The front side block 12 includes
A bolt passage hole 20 and an oil introduction passage 25 for guiding the lubricating oil accumulated at the bottom of the discharge chamber 14 to the low pressure introduction passage 28 described later are formed. As shown in FIG. 1, a part of the outlet side opening 32 of the oil introduction passage 25 is
And the remainder is the front end face 1a of the cam ring 1.
Is facing.

The cam ring 1 has bolt holes 2
6, 27, a discharge port 16, a passage forming part of the discharge passage 18, and a discharge valve housing space 15 for housing a discharge valve (not shown).

The cam ring 1 is formed with two low-pressure introduction passages 28 penetrating in the axial direction (only one low-pressure introduction passage is visible in FIG. 2). Low pressure introduction passage 2
The rear side of 8 communicates with the suction chamber. Low pressure introduction passage 2
8 is a passage for guiding a part of the refrigerant gas in the suction chamber from the front side of the cam ring 1 to the compression chamber 10.

At both end surfaces 1a and 1b of the cam ring 1, suction ports 29a and 29b for guiding the refrigerant gas in the low pressure introducing passage 28 to the compression chamber 10 are formed, respectively.

The rear end of the shaft 6 is rotatably supported by a radial bearing 30 in the rear head 3, and the front end of the shaft 6 is rotatably supported by a radial bearing 31 of the front side block 12.

The front head 11, the cam ring 1, and the rear head 3 are integrally connected by a through bolt (not shown).

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

The driving force of an engine (not shown) is
, The rotor 2 rotates integrally with the shaft 6, and the tip of the vane 9 slides on the inner peripheral surface 1 c of the cam ring 1.
As the rotor 2 rotates, the refrigerant gas flows from the suction chamber into the compression chamber 10 through one suction port 29b, and a part of the refrigerant gas in the suction chamber 29b advances to the front side through the low-pressure introduction passage 28, and the cam ring 1 Flows into the compression chamber 10 from the front side through the other suction port 29a.
Since the volume of the compression chamber 10 changes with the rotation of the rotor 2, the refrigerant gas trapped between the vanes 9 is compressed, and the compressed refrigerant gas passes from the discharge port 16 through the discharge valve housing space 15 to the discharge chamber. 14 is discharged.

The refrigerant gas in the discharge chamber 14 is supplied to the oil separator 19
When the gas passes through the refrigerant gas, the lubricating oil is separated from the refrigerant gas, and the refrigerant gas is discharged from the discharge port 17 to the condenser side of the refrigeration system.

On the other hand, the lubricating oil separated by the oil separator 19 accumulates at the bottom of the discharge chamber 14, and then a part of the lubricating oil flows into the low pressure introducing passage 28 through the oil introducing passage 25. Since a part of the outlet side opening 32 of the oil introduction passage 25 faces the low pressure introduction passage 28 and the remaining part faces the front end surface 1a of the cam ring 1, the outlet area of the oil introduction passage 25 is reduced, and the oil introduction is reduced. The flow of the lubricating oil through the passage 25 is restricted, and the amount of the lubricating oil flowing into the low-pressure introduction passage 28 is limited. The lubricating oil that has flowed into the low-pressure introduction passage 28 flows into the compression chamber 10 while diffusing in a mist state together with the refrigerant gas, and is supplied to sliding parts such as the vanes 9.

According to this embodiment, even if the amount of lubricating oil contained in the refrigerant gas flowing into the compressor is insufficient, remarkable wear and seizure of the sliding portion can be prevented.

Since the amount of the lubricating oil flowing from the discharge chamber 14 into the low-pressure introduction passage 28 is restricted, lubricating oil that cannot pass through the oil introduction passage 25 always accumulates, and refrigerant gas in the discharge chamber 14 is discharged. It is hard to leak into the low pressure introduction passage 28,
A decrease in compressor performance is suppressed. In addition, when the oil introduction passage 25 is machined, it is not necessary to machine the oil introduction passage 25 with a very small diameter, so that deburring becomes easy. If the deburring is incomplete, the flow of the lubricating oil is obstructed by the burrs remaining in the oil introduction passage 25, and the amount of the lubricating oil supplied to the sliding portion of the compressor becomes insufficient. May cause seizure.

Further, a part of the outlet side opening 32 is closed by the front end surface 1a of the cam ring 1 and the flow of the lubricating oil passing through the oil introduction passage 25 is restricted, so that the lubricating oil flowing into the low pressure introduction passage 28 Can be diffused into the compression chamber 10 in a mist state.

FIG. 5 is a view for explaining a vane-type compressor according to a second embodiment of the present invention. FIG. 5 (a) shows a front side end face of a front side block and a cam ring when a front head is removed. FIG. 7B is a partially enlarged perspective view of the cam ring, FIG. 6 is a front end view of the front side block, and FIG. 7 is a front end view of the cam ring. Front side block 1 of this embodiment
The components other than 12 and the cam ring 101 are the same as those of the first embodiment, and the description of the common parts will be omitted.

In the first embodiment shown in FIG.
In the second embodiment, a hole 133 communicating with the low-pressure introduction passage 128 is formed in the front end surface 101a of the cam ring 101, although a part of the outlet-side opening 32 of the fifth ring 5 faces the low-pressure introduction passage 28. Outlet opening 13 of oil introduction passage 125 of front side block 112
2 was arranged so as to face the hole 133. The hole 133 is a very shallow counterbore.

The lubricating oil in the discharge chamber 14 is
5, the flow of the lubricating oil is restricted by the hole 133 of the cam ring 101, so that the amount of the lubricating oil supplied to the low-pressure introduction passage 128 is limited.

According to this embodiment, the same effects as in the first embodiment can be obtained.

FIG. 8 is a view for explaining a vane-type compressor according to a third embodiment of the present invention. FIG. 8A shows a front side end face of a front side block and a cam ring when a front head is removed. FIG. 9B is a partially enlarged perspective view of the cam ring, and FIG. 9 is a front end view of the front side block. Components other than the front side block 212 of this embodiment are the same as those of the first embodiment, and a description of the common parts will be omitted.

In the first embodiment shown in FIG.
In the third embodiment, a part of the outlet side opening 232 of the oil introduction passage 225 of the front side block 212 faces the compression chamber 10 in the third embodiment. Thus, the remaining portion of the outlet side opening 232 faces the front end surface of the rotor 2.

The lubricating oil in the discharge chamber 14 is
5, the flow of the lubricating oil is restricted at the front end face of the rotor 2, so that the amount of the lubricating oil supplied to the low-pressure introduction passage 228 is limited.

According to this embodiment, the same effects as in the first embodiment can be obtained.

In each of the above embodiments, the oil introduction passages 25, 125, and 225 are
2, 112, 212 are described,
For example, an oil introduction passage may be provided in the rear head 3, and lubricating oil may be supplied to the compression chamber 10 from the rear side of the low-pressure introduction passages 28, 128, 228, or the oil introduction passage may be provided to both front and rear side members. It may be provided.

In the above-described second embodiment, a hole 133 is provided in the front end face 101a of the cam ring 101, and the outlet 133 of the oil introduction passage 125 is formed in the hole 133.
Has been described, but in addition to this example, a hole similar to the hole 33 is formed in the cam ring side end surface (rear side end surface) of the front side block 112, and the outlet side opening of the oil introduction passage is formed in this hole. May be faced.

Further, in each of the embodiments described above, the case where only one oil introduction passage 25, 125, 225 is provided in the compressor has been described.
2, 112, 212 may be provided with a plurality of oil introduction passages, or the front side blocks 12, 112, 2
A plurality of oil introduction passages may be provided in the rear head 12 and the rear head 3, respectively.

[0053]

As described above, according to the vane type compressor of the first or fourth aspect of the present invention, since the lubricating oil is supplied to the sliding portion, the lubricating oil contained in the refrigerant flowing into the compressor is provided. Even if the amount is insufficient, remarkable wear and seizure of the sliding portion can be prevented.

According to the vane type compressor of the second or third aspect of the present invention, the processing of the oil introduction passage can be simplified without lowering the performance of the compressor.

According to the vane type compressor of the fifth aspect of the invention, the processing of the oil introduction passage can be simplified.

[Brief description of the drawings]

FIG. 1 is a view for explaining a vane type compressor according to a first embodiment of the present invention. FIG. 1 (a) shows a front side of a front side block and a cam ring when a front head is removed. FIG. 2B is an end view, and FIG. 2B is a partially enlarged perspective view of the cam ring.

FIG. 2 is a vertical sectional view of the vane compressor according to the first embodiment of the present invention.

FIG. 3 is a front end view of a front side block.

FIG. 4 is a front end view of a cam ring.

FIG. 5 is a view for explaining a vane-type compressor according to a second embodiment of the present invention. FIG. 5 (a) shows the front side of a front side block and a cam ring when a front head is removed. FIG. 2B is an end view, and FIG. 2B is a partially enlarged perspective view of the cam ring.

FIG. 6 is a front end view of the front side block.

FIG. 7 is a front end view of the cam ring.

FIG. 8 is a view for explaining a vane-type compressor according to a third embodiment of the present invention. FIG. 8 (a) shows the front side of a front side block and a cam ring when a front head is removed. FIG. 2B is an end view, and FIG. 2B is a partially enlarged perspective view of the cam ring.

FIG. 9 is a front end view of the front side block.

FIG. 10 is a longitudinal sectional view of a conventional vane type compressor.

FIG. 11 is a front end view of the front side block and the cam ring when the front head is removed.

FIG. 12 is a front end view of a cam ring.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1, 101 Cam ring 1a, 101a Front end face of cam ring (other end face of cam ring) 2 Rotor 3 Rear head (side member) 8 Vane groove 9 Vane 10 Compression chamber 11 Front head 12, 112, 212 Front side block 25, 125, 225 Oil introduction passage 28, 128, 228 Low pressure introduction passage 32, 132, 232 Outlet side opening 133 hole

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Keiichi Kanesugi 39, Higashihara, Chiyo-ji, Odai-gun, Osato-gun, Saitama Prefecture Inside of Xexel Valeo Climate Control (72) Inventor Kazutaka Owada Chiyo, Daiyo-Konan-cho, Osato-gun, Saitama 39, Higashihara, Zexel Valeo Climate Control Co., Ltd. (72) Inventor Hidetoshi Arahata, Konan-cho, Osato-gun, Saitama Prefecture 39 characters Higashihara Higashihara, Zexel Valeo Climate Control Co., Ltd. 39, Chiyoji, Higashihara, Zexel Valeo Climate Control Co., Ltd. The internal F-term (reference) 3H029 AA05 AA15 AB03 BB09 CC33 CC44 3H040 AA09 BB04 BB05 BB11 CC08 DD12 DD22 DD23 DD25

Claims (5)

[Claims] 1. A cam ring, two side members fixed to both ends of the cam ring, a rotor rotatably housed in the cam ring, and slidably inserted into a plurality of vane grooves of the rotor. Multiple vanes,
A compression chamber formed between the vanes that are in front and rear of the rotation direction of the rotor, and a portion of the low-pressure refrigerant gas that penetrates the cam ring in the axial direction and is introduced from one end of the cam ring to the other of the cam ring. A vane-type compressor having a low-pressure introduction passage leading to the compression chamber from an end side, wherein the lubricating oil formed in at least one of the two side members and separated in a high-pressure space is introduced to the low-pressure introduction passage. A vane-type compressor comprising an oil introduction passage. 2. The vane-type compressor according to claim 1, wherein a part of the outlet side opening of the oil introduction passage faces the low pressure introduction passage, and the remaining part faces the other end surface of the cam ring. . 3. A hole communicating with the low-pressure introduction passage is formed in the other end surface of the cam ring or the cam ring-side end surface of the one side member, and an outlet-side opening of the oil introduction passage faces the hole. The vane type compressor according to claim 1, wherein 4. A cam ring, two side members fixed to both ends of the cam ring, a rotor rotatably housed in the cam ring, and slidably inserted into a plurality of vane grooves of the rotor. Multiple vanes,
A compression chamber formed between the vanes that are in front and rear of the rotation direction of the rotor, and a portion of the low-pressure refrigerant gas that penetrates the cam ring in the axial direction and is introduced from one end of the cam ring to the other of the cam ring. A vane-type compressor having a low-pressure introduction passage leading from the end side to the compression chamber; an oil formed in at least one of the two side members and guiding lubricating oil separated in a high-pressure space to the compression chamber; A vane type compressor having an introduction passage. 5. The vane-type compressor according to claim 4, wherein a part of an opening on an outlet side of the oil introduction passage faces the compression chamber, and a remaining part thereof faces the other end surface of the rotor.