JPS5815672Y2 - Bengata Atsushiyukuki - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a vane compressor that forcibly supplies lubricating oil to each sliding part using discharge pressure.

Conventionally, this type of compressor, for example, a vane-type refrigerant compressor for a car cooler, has a compressor body covered with a hermetic casing, and the hermetic casing is connected to the compressor body built inside. It has a discharge side chamber for the compressed refrigerant, and the lower part is a lubricating oil reservoir.

In this way, the refrigerant flowing out of the heat exchange evaporator is compressed, the lubricating oil is separated in the discharge side chamber, the compressed refrigerant is guided from the discharge side chamber to the condenser, and the separated lubricating oil is used for lubrication. The refrigerant is forcibly supplied from the oil reservoir to each sliding part by the pressure of the discharged refrigerant.

Therefore, even when the compressor is started, it takes time until the pressure in the discharge side chamber becomes such that lubricating oil can be forcibly supplied to each sliding portion.

The purpose of this device is to quickly increase the pressure in the discharge side chamber at startup, forcefully supply lubricating oil to each stationary part using the discharge pressure, and use the lubricating oil to press the vane against the inner peripheral surface of the cylinder. Provides a vane type compressor.

To this end, the vane type compressor of this invention is equipped with a regulating valve that cuts off communication between the discharge side chamber and the high-pressure side of the refrigeration system until the discharge side chamber reaches a predetermined pressure at startup.

Hereinafter, specific examples of a desirable vane type compressor according to this invention will be described with reference to the drawings.

Referring to FIGS. 1-3, an embodiment of the vane compressor of the present invention adapted for use in a car cooler is designated generally at 10.

This compressor 10 has a suction side connector 70 and a discharge side connector 71 corresponding to an outlet of a heat exchange evaporator (not shown) and an inlet of a condenser (not shown) of a refrigeration system of a car cooler, respectively. It is connected via conduits 72 and 73, and is constructed so that the compressor body is hermetically covered with a hermetic casing 11, and the lubricating oil to the sliding parts of each component is forced by the pressure of the discharged refrigerant. The lubricating oil pressurized by the pressure of the discharged refrigerant is also used to press each vane 15 against the inner circumferential surface 24 of the cylinder 12.

Furthermore, when the compressor 10 is started, communication between the discharge side chamber 56 and the condenser is cut off until the pressure in the discharge side chamber reaches a pressure suitable for lubrication, and the lubricating oil pressurized by the discharged refrigerant maintains a stable cylinder state. A regulating valve 60 is provided for quickly pressing the vane 15 against the inner circumferential surface 24 of the vane 12.

In a sealed state, the cylinder assembled in the sealed casing 11 includes a cylindrical cylinder main body 20 with both ends open, and a front and a front cylinder body 20 that are fastened with bolts (not shown) corresponding to both ends. It includes a rear end plate 21, 22, the cylinder 12 of which is provided with a cylinder bore 23 in which the rotor 13 is accommodated.

The cylinder hole 23 has an inner peripheral surface 24 that cooperates with the outer peripheral surface 13a of the rotor 13, and a tangential seal 17.
The rotor 13 is housed in the cylinder hole 23 so that a working chamber 16 is formed between the inner peripheral surface 24 of the cylinder hole 23 and the outer peripheral surface 13a of the rotor 13.

For this purpose, the rotor 13 is eccentric from the axis of the cylinder hole 23 and rotatably supported by the rotating shaft 14 .

A suction port 25 and a discharge port 26 of the compressor 10 are formed in the front end plate 21 and the cylinder body 20, respectively.

Of course, the suction port 25 and the discharge port 26 are partitioned by a tangent seal 17 in cooperation with the rotor 13 and a base 715 slidably inserted into the slit 40 of the rotor 13, which will be described in detail later. They are provided on the suction stroke side and the discharge stroke side of the working chamber 16.

In particular, the suction port 25 has a tangential seal 17 at one end.
The outlet opening 26 is arranged in an arc adjacent to the front end plate 21 and the cylinder body 20, and adjacent to the tangent seal 17, respectively.

Furthermore, the discharge port 26 cooperates with the cylindrical casing body 42 of the sealed casing 11, which will be described in detail later, and further with the front and rear end plates 21, 22, and enters the discharge chamber 28 formed outside the cylinder main stream 20. They are communicated via a discharge valve 27.

This discharge chamber 28 is connected to a discharge side chamber 56 formed in the rear lid 44 of the sealed casing 11 attached to the outside of the rear end plate 22 via a discharge side communication passage 29 bored in the rear end plate 22.
has been contacted.

Further, the discharge chamber 28 is connected to an outlet chamber side connected to a refrigerant outlet chamber 57 formed by grooves 58 formed on the outer circumferential surface of the cylinder body 20 at intervals in the circumferential direction of the cylinder 12 and formed in the rear end plate 22. They are communicated via passage 59.

The coolant outlet chamber 57 cooperates with the front and rear end plates 21, 22 and the cylindrical casing body 42 to form a chamber.

This refrigerant outlet chamber 57 is a discharge side chamber 56 from which lubricating oil is separated.
A discharge side connector 71 is provided for connecting a conduit 73 that leads refrigerant discharged from the condenser to the inlet of the condenser.

The front end plate 21 has a bearing hole 30 through which the tip 14a of the rotating shaft 14 is passed and supports the tip 14a via the suction side sliding bearing 18, and the rear end plate 22 has a bearing hole 30 that supports the tip 14a of the rotating shaft 14 through the rear end of the rotating shaft 14. A bearing hole 31 for supporting the discharge side sliding bearing 19 is formed in each case.

Of course, the bearing holes 30, 31 are located in the front and rear end plates 21.2.
2 cooperate with each other to connect the inner circumferential surface 24 of the cylinder hole 23 and the rotor 1.
In order to form a working chamber 16 and a tangential seal 17 between the outer peripheral surface 13a of the cylinder hole 23 and the outer circumferential surface 13a of the cylinder hole 23,
It is worn by.

The front and rear end plates 21.22 also have concentric shafts in their respective bearing holes 30.31 on the inner surfaces 21a, 22a forming end seals between the end surfaces 13b, 13c of the rotor 13 in sliding contact. An annular groove 32.33 is carved into the outer peripheral surface of the corresponding end surface 13b, 13c of the rotor 13 and the front and rear end portions 14a, 14b of the rotating shaft 14, thereby forming an oil reservoir chamber 34.35. Configure.

The rotor 13, which is eccentrically and rotatably housed in the cylinder hole 23, is a disk having end surfaces 13b and 13c that cooperate with the inner surfaces 21a and 22a of the corresponding front and rear end plates 21 and 22 to form an end seal. The rotating shaft 14 is inserted into the center of the rotating shaft 1 so as to pass through it.
4 has a shaft hole 39 for fixing the rotor 13 therein.

Further, the rotor 13 has end face reliefs 13d and 13e formed concentrically with the shaft hole 39 on each end face 13b and 13c.

Furthermore, the rotor 13 is provided with four radial slits 40 which are machined at 90 degree intervals in the circumferential direction.

The slits 40 have oil reservoir chambers 34 at the bottom of each.
A slit oil chamber 41 communicating with the slant 35 is integrally machined, and a vane 15 is slidably inserted into each slant 40.

The outer circumferential surface 13a of the rotor 13 is supplied with lubricating oil pressurized by the discharged refrigerant supplied to the slit oil chamber 41.
is pushed out, and each tip is pressed against the inner circumferential surface 24 of the cylinder hole 23 under a predetermined pressing force, and the working chamber 16 is divided into a plurality of small chambers 1.
6a, 16b, 16c.

It is divided into 16dK.

The sealed casing 11 that hermetically covers the cylinder 12 includes a cylindrical casing main body 42 with both ends open, and front and rear lids that are integrally fixed by tightening bolts (not shown) corresponding to both ends. 43.44.

The cylindrical casing body 42 has front and rear lids 43.4.
4 to form the hermetic casing 11, a lubricating oil reservoir 45 located at the bottom of the hermetic casing 11 is integrally formed.

The front lid 43 has a shaft cylindrical portion 46 formed in its center, and the tip 14a of the rotating shaft 14 is passed through to the outside of the sealed casing 11. A clutch (not shown) is attached to the tip 14a, and the clutch is operated. Through the engine (not shown)
The rotating shaft 14 can be connected to the rotating shaft 14.

The shaft cylindrical portion 46 constitutes a seal chamber 48 in which a seal member 47 is disposed around the tip 14a of the rotating shaft 14 so as to seal around the tip 14a.

Further, the front lid 43 has an annular groove 4 opened in its inner surface 43a so as to cooperate with the outer surface 21b of the front end plate 21 to form an annular suction side chamber 50 around the shaft cylinder portion 46.
A communication port 51 formed in the shaft cylinder portion 46 communicates the seal chamber 48 and the suction side chamber 50 with each other.

The suction side chamber 50 also supplies the suction refrigerant to the cylinder 1.
20 Suction port 2 so as to lead to the suction stroke side of the working chamber 16
5 has been contacted.

Further, the front lid 43 has a suction side chamber 50 on the outlet side of the evaporator.
A suction side connector 70 is attached to connect the

On the other hand, when the rear lid 44 is attached to the rear end plate 22, it cooperates with the outer surface 22b of the rear end plate 22 to form a high pressure oil chamber 54 and an annular discharge side chamber 56 around it. A cavity 52 that is open to the inner surface 44a of the rear lid 44 and partitioned by an annular lip 53 and an annular groove 55 arranged around the cavity 52 are formed.

The high pressure oil chamber 54 communicates with the bearing hole 31 so that the lubricating oil supplied from the lubricating oil reservoir 45 is supplied to the oil reservoir chamber 35 via the discharge side sliding bearing 19. Lubricating oil is supplied to the chamber 54 through an oil pipe 37 formed in the rear end plate 22 and inserted into a hole 36 and fixed.
This is done by

Of course, the lubricating oil can be pushed up from the low-positioned lubricating oil reservoir 45 to the high-pressure oil chamber 54 by communicating the discharge side chamber 56 and the lubricating oil reservoir 45 through the notch passage 38 formed in the rear end plate 22. The refrigerant in the side chamber 56 is discharged by acting on the lubricating oil in the lubricating oil reservoir 45.
As shown in the figure, an adjustment valve 6 is provided in the outlet chamber side communication passage 59.
0 is set.

This regulating valve 60 has an annular stopper 6 fixed to the passage 59.
4, an annular valve seat 6 positioned within its passageway 59 by
2, a ball valve 61 that opens and closes the opening of the valve seat 62, and an adjustment spring 63 that always presses the ball valve 61 against the valve seat 62, and when the pressure in the discharge side chamber 32 exceeds the pressure suitable for forced lubrication. The ball valve 61 is opened to communicate the discharge side chamber 32 and the refrigerant outlet chamber 57, and to guide the compressed refrigerant from the discharge side chamber 32 through the refrigerant outlet chamber 57 and the discharge side connector 71 to the condenser.

In order to increase the valve pressure during this adjustment valve 60, a magnet may be combined with the adjustment spring 63.

The compressor 10 configured as described above is prefilled with lubricating oil and connected to the refrigeration system of the car cooler, that is, to the outlet of the heat exchange evaporator and the inlet of the condenser, respectively, with conduits 72.7.
Connect the suction side and discharge side connectors 70, 71 through the rotary shaft 14 through the electromagnetic clutch (not shown).
can be connected to an engine (not shown) to complete preparations for operation.

Next, the electromagnetic clutch is activated to drive the compressor 10.

When driven, the rotor 13 is rotated together with the rotating shaft 14, so that the refrigerant flows from the evaporator through the conduit 12, the suction side connector 70, the suction side chamber 50, and the suction port 25 to the suction stroke side of the working chamber 16 of the cylinder 12. It gets sucked in.

□The refrigerant sucked into the working chamber 16, that is, the small chamber divided by the bay 715, is compressed as the rotor 13 rotates, the volume of the small chamber is gradually reduced, and the refrigerant is discharged from the discharge valve 27 through the discharge port 26. Open and discharge chamber 2
It is discharged into the discharge side chamber 56 through the passage 29.

The discharged refrigerant that has flowed into the discharge side chamber 56 separates the lubricating oil here.

In this case, in order to more effectively separate the lubricating oil from the discharged refrigerant, an oil separator may be attached to the outlet of the discharge side communication passage 29.

Further, the separated lubricating oil flows into the lubricating oil reservoir 45 through the notched passage 38.

Since the regulating valve 60 is closed and the condenser side of the discharge side chamber 32 is shut off, the internal pressure is quickly increased after startup, and lubricating oil is forcibly supplied to each sliding part and each vane 15 from the lubricating oil reservoir 45. Start supplying.

That is, the lubricating oil is caused by the pressure of the refrigerant in the discharge side chamber 56.
The lubricating oil goes up the oil pipe 37 from the lubricating oil reservoir 45, is supplied to the high pressure oil chamber 54, then lubricates the discharge side sliding bearing 19, and flows into the oil reservoir chamber 35.

Subsequently, the lubricating oil flows into each slit oil chamber 41 , acts on the back of the plate 715 in each slit 40 , and then flows into the oil sump chamber 34 .

Furthermore, lubricating oil is supplied to the suction side sliding bearing 1 from the oil reservoir chamber 34.
8 and flows into the seal chamber 48 and further flows into the suction side chamber 50 via the communication port 51.

The lubricating oil is then mixed with the suction refrigerant and
5 into the working chamber 16 of the cylinder 12.

Thereafter, the lubricating oil is carried along with the refrigerant to the discharge side chamber 56, where it is separated from the discharged refrigerant, returned to the lubricating oil reservoir 45 through the notched passage 38, and circulated again through the above-mentioned path.

As the operation continues, the internal pressure of the discharge side chamber 56 further increases, and accordingly, the regulating valve 60 is opened and the discharge side chamber 56 and the outlet chamber 57 are communicated via the passage 59, so that the compressor 10 starts supplying the discharged refrigerant to the condenser via the discharge side connector 71 and the conduit 73.

The refrigerant then circulates through the refrigeration system.

According to this invention described above, the cylinder consists of a cylinder body with both ends open, and front and rear end plates, a sealed casing hermetically envelops the cylinder, and a discharge chamber and a refrigerant outlet chamber are enclosed within the sealed casing. Inside the
A discharge side communication passage and an outlet chamber side communication passage are formed on the outer circumferential surface of the cylinder body, cooperated with the front and rear end plates and the sealed casing, and separated from each other, and further formed on the rear end plate. The passage connects the discharge chamber to the refrigerant outlet chamber via the discharge side chamber, and the regulating valve is disposed in the outlet chamber side communication passage, so that at startup, until the internal pressure of the discharge side chamber reaches a predetermined value, The discharge side chamber and the high pressure side of the refrigeration system are shut off by a regulating valve, and the internal pressure of the discharge side chamber is immediately increased after startup, and the discharge pressure enables rapid forced lubrication of each sliding part. In this case, the pressurized lubricating oil presses the vane against the cylinder, that is, the inner peripheral surface of the cylinder hole in the cylinder body, and the compressor is brought into steady operation as soon as possible, without the need for an oil separator. In addition, the lubricating oil accompanying the discharged refrigerant is sufficiently separated in the discharge side chamber and returned to the lubricating oil reservoir, preventing a decrease in the condensing capacity of the refrigeration system condenser and preventing operational troubles in the compressor itself. Moreover, the compressor is made smaller.

Further, according to this invention, there is provided a vane type compressor in which the vanes are pressed against the inner circumferential surface of the inner cylinder under an appropriate pressing force immediately after starting, and a predetermined compression capacity is obtained.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a preferred embodiment of the vane compressor of this invention, FIG. 2 is a cross-sectional view taken along line 2-2 in FIG. 1, and FIG. FIG. 3 is a partial cross-sectional view taken along line 3-3. 10... Vane type compressor, 11... Sealed casing, 12... Cylinder, 13...
... Rotor, 14 ... Rotating shaft, 15 ...
...Vane, 16...Working room, 17...
・Tangent seal, 58...Refrigerant outlet chamber, 59...Exit chamber side communication passage, 60...
Regulating valve, 61...Ball valve, 62...Co-production,
63...adjustment spring.

Claims (1)

[Claims for Utility Model Registration] A cylinder body 20 with both ends open, a front end plate 21 disposed at one open end of the cylinder body 20, and a rear end disposed at the other open end of the cylinder body 20. It consists of a plate 22, and the suction port 25 is connected to the front end plate 2.
1, a cylinder 12 having a discharge port 26 formed in its cylinder body 20, a rotor 13 rotatably supported in a cylinder hole 23 of the cylinder 12 by a rotating shaft 14, and the rotor 13.
The discharge pipe is slidably inserted into a radial slit 40 formed in the cylinder hole 23 and maintains sliding contact with the inner circumferential surface 24 of the cylinder hole 23 to form a working chamber within the cylinder hole 23. The vane 15 is pressed against the inner circumferential surface 24□ of the cylinder hole 23 by lubricating oil pressurized with refrigerant, and the cylinder 12 is hermetically sealed inside, and cooperated with the cylinder 12 to A suction side chamber 50 and a discharge side chamber 5
6 and a closed casing 11 forming a lubricating oil reservoir 45 under the action of a discharge refrigerant and furthermore having suction and discharge connectors 70 and 71 for its suction side chamber 50 and discharge side chamber 56; inside its front and rear end plates 21 and 22 and its closed casing 1
1, a discharge chamber 28 formed on the outer circumferential surface of the cylinder body 20 and communicated with the cylinder hole 23 via the discharge port 26; Rear end plates 21 and 22 and their closed casing 1
1 and separated from the discharge chamber 28,
A refrigerant outlet chamber 57 formed on the outer circumferential surface of the cylinder body 20 and communicated with the discharge side connector 71, and a discharge chamber 28 connected to the discharge side chamber 56.
A discharge side communication passage 29 formed in the rear end plate 22 and an outlet chamber side communication passage 59 formed in the rear end plate 22 so as to communicate the discharge side chamber 56 with the refrigerant outlet chamber 57.
and a regulating valve 60 that is disposed in the outlet chamber side communication passage 59 and opens when the discharge side chamber 56 reaches a predetermined pressure during startup.