JP4409185B2 - Compressor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a compressor that compresses a gas fluid, and relates to a compressor that is used, for example, in an air conditioner for an automobile.
[0002]
[Prior art]
In conventional vane type compressors, an oil storage section is provided in the high pressure chamber, and during normal operation except immediately after startup, lubricating oil stored in the high pressure chamber oil storage section using a vane back pressure application device or a similar mechanism is used. Is supplied to the vane back pressure portion to push the vane out of the rotor, and the cylinder, vane, rotor, and the like are lubricated (see, for example, Patent Documents 1 and 2).
[0003]
In such a compressor, a part of compressor lubricating oil is always discharged into the refrigeration cycle together with the compressed gas fluid.
[0004]
[Patent Document 1]
JP 62-58082 A (page 3-4, Fig. 1-2)
[0005]
[Patent Document 2]
JP 56-107992 (page 2-3, FIG. 2)
[0006]
[Problems to be solved by the invention]
By the way, in the above-mentioned compressor, the lubricating oil stored in the high-pressure chamber oil storage section needs to have an oil surface that is at least higher than the lubricating oil supply opening position.
[0007]
The surface of the lubricating oil stored in the high-pressure chamber oil storage section is always in a undulating state and a bubbling state due to the flow of the compressed gas fluid.
[0008]
Therefore, when undulations and foaming are large, a part of the lubricating oil is caught in the compressed gas-fluid flow and discharged from the gas discharge port of the compressor into the refrigeration cycle. The amount decreases.
[0009]
Due to these factors, a gas (gas) component is mixed into the lubricating portion of the compressor from the lubricating oil supply port to which only the lubricating oil should be supplied. When this gas component is mixed, the pressure of the lubricating oil supplied to the vane back pressure part becomes unstable, a vane jump phenomenon occurs, and a compressor vibration / noise problem due to the collision between the vane and the cylinder occurs. In addition, the vane tip wear increases due to the jump phenomenon, and durability and reliability deteriorate.
[0010]
In particular, when the gas discharge port of the compressor is provided in a substantially horizontal direction, the lubricating oil surface of the oil storage unit and the gas discharge port are close to each other, so that the lubricating oil in the oil storage unit is easily discharged during the system cycle of the air conditioner. In addition, in a vehicle, since the vehicle is tilted depending on the state of the mountain road or road surface, the compressor may be tilted from the normal state, and the amount of lubricating oil in the high-pressure chamber oil storage part is further discharged during the system cycle of the air conditioner. The system efficiency of the air conditioner becomes worse. In addition, since the amount of lubricating oil in the high-pressure chamber oil storage section is reduced, problems such as compressor seizure, vane wear, and noise will occur, reducing reliability and durability.
[0011]
In view of the above-described conventional problems, the present invention provides a compressor having a structure with a simple structure that prevents undulation and foaming of a lubricating oil surface stored in a high-pressure chamber oil storage unit and suppresses a decrease in the amount of oil storage. Objective.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, in the compressor according to the present invention, a substantially L-shaped anti-wave wall is formed in the high-pressure chamber of the compressor so as to be substantially parallel to the surface of the lubricating oil. The area is set to 20 to 50% of the cross-sectional area inside the high-pressure chamber at the position of the anti-shake wall, and the anti-shake wall is vertically below the gas outlet opening and the side provided with the gas outlet opening. In the standard condition of the air conditioning system, the position of the anti-ripening wall is substantially the same as the lubricating oil level of the oil storage part. The same plane position is used.
[0013]
If the anti-wave wall is above the lubrication surface of the oil storage unit in the standard condition of the air conditioning system, the leveling and cross-sectional area of the anti-wave wall is not the same as the structure of the compressor.・ It is recommended to set the anti-rippling position according to the configuration and application.
[0014]
The anti-ripple wall set in this way suppresses undulation and foaming of the lubricating oil surface stored in the high-pressure chamber oil storage part, and a part of the undulating and foamed lubricating oil is caught in the flow of the air-fluid It is also suppressed that it is discharged during the system cycle. In addition, a decrease in the amount of lubricating oil in the oil storage section can be suppressed.
[0015]
Thereby, mixing of gas components in the lubricating oil supplied to the vane back pressure part is suppressed, and the pressure of the vane back pressure part is stabilized, so that the vibration and noise of the compressor can be prevented. In addition, the wear of the vane tip can be suppressed and the durability of the compressor can be improved.
[0016]
In addition, by forming the anti-rippling wall so as to block the flow along the wall surface from the lubricating oil surface to the gas outlet opening in the high pressure chamber, a part of the lubricating oil stored in the high pressure chamber oil storage portion is compressed. It is possible to further suppress discharge to the outside of the machine.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1)
Embodiment 1 of the present invention will be described below with reference to the drawings. 1 to 4, 1 is a cylinder having a cylindrical inner wall, 2 is a rotor in which a part of the outer periphery forms a minute gap with the inner wall of the cylinder 1, and 3 is in a plurality of vane slots provided in the rotor 2. A plurality of vanes 4 slidably inserted, 4 is a drive shaft that is integrally formed with the rotor 2 and is rotatably supported, and 5 and 6 are respectively closed at both ends of the cylinder 1 to form working chambers therein. The front side plate and the rear side plate, 7 is a discharge hole for discharging the compressed fluid from the working chamber on the high pressure side, 8 is a discharge valve disposed in the discharge hole, and 9 is a high pressure for guiding the compressed fluid to the high pressure chamber 10. The passage 11 is a high-pressure case forming the high-pressure chamber 10, and the rectifying wall 21 is integrally formed with the high-pressure case 11.
[0018]
12 is a gas discharge port for discharging the compressed fluid from the high pressure chamber 10 to the system cycle of the air conditioner, 13 is a vane back pressure applying device, 14 is a lubricating oil supply port provided at the lower part of the vane back pressure applying device 13, 15 is a strainer that prevents inflow of debris and fine metal fragments, 16 is an oil supply passage, 17 is a vane back pressure portion, and the vane back pressure applying device 13 is used to store the lubricating oil stored in the oil storage portion 10a at the lower portion of the high pressure chamber 10. The vane back pressure part 17 is supplied from the lubricating oil supply port 14 through the oil supply path 16.
[0019]
When power is transmitted from a driving source such as an engine and the drive shaft 4 and the rotor 2 rotate, the compressed high pressure fluid pushes up the discharge valve 8 from the discharge hole 7 and flows into the high pressure chamber 10 from the high pressure passage 9. The gas is discharged out of the compressor through a gas discharge port 12 provided in the case. At this time, the lubricating oil separated in the upper part of the high pressure chamber 10 is dropped and stored in the high pressure chamber oil storage part 10a.
[0020]
The anti-rippling wall 21 leveles the fluid from the high-pressure passage 9 toward the gas discharge port 12, thereby suppressing the undulation and bubbling of the lubricating oil stored in the high-pressure chamber oil storage portion 10a, and the high-pressure chamber oil storage portion 10a. It is possible to suppress a part of the stored lubricating oil from being discharged again outside the compressor on the flow of the fluid, and to suppress a decrease in the oil storage amount as shown in FIG. Thereby, it is possible to stably supply the lubricating oil from the lubricating oil supply port 14 of the vane back pressure applying device 13 to the compression mechanism.
[0021]
In addition, supply of lubricating oil containing no gas component to the vane back pressure section stabilizes the vane back pressure and stabilizes the reciprocating sliding movement of the vane, resulting in the generation of noise and vibration of the compressor as shown in FIG. Can be prevented and reliability can be improved.
[0022]
Further, since the anti-rippling wall 21 is formed so as to block the flow along the wall surface from the lubricating oil surface toward the gas discharge port opening 12 in the high pressure chamber 10, the lubricating oil stored in the high pressure chamber oil storage portion 10a is used. Can be further suppressed from being discharged to the outside of the compressor.
[0023]
And it confirmed that the said effect was acquired when the cross-sectional area of the anti-wave wall 21 was 20 to 50% with respect to the cross-sectional area inside the high-pressure chamber 10 at the position where the anti-wave wall 21 was formed. If the ratio is less than 20%, the effect of suppressing the undulation and foaming of the lubricant may be reduced. If the ratio exceeds 50%, the degree of freedom of arrangement of the lubricant supply port 14 will be hindered and the return of the lubricant to the oil storage section 10a may occur. There are cases where it cannot be performed smoothly.
[0024]
The anti-rippling wall 21 suppresses the undulation and foaming of the high-pressure chamber oil storage unit 10a. Therefore, the position where the anti-wave wall 21 is provided is the oil when the entire amount of lubricating oil in the refrigeration cycle is sealed in the high-pressure chamber oil storage unit 10a. Make it lower than the surface height.
[0025]
(Embodiment 2)
The second embodiment of the present invention is a case where the gas discharge port 12 is close to the oil storage section as shown in FIG. The wave preventing wall 21 is formed in the lower part of the vicinity of the gas discharge port 12. In some cases, it is more effective to make the width a of the rectifying wall larger than the dimension b of the gas discharge port, and the dimension changes on a case-by-case basis.
[0026]
In the second embodiment, the same effect as in the first embodiment is obtained, and the lubricating oil surface of the high-pressure oil storage section is disturbed and foamed by the lubricant accumulated in the high-pressure chamber oil storage section 10a or the fast gas flow compressed by the compressor. Further, there is an effect of suppressing a part of the lubricating oil from being discharged from the gas discharge port 12. In particular, in a vehicle, the vehicle tilts or jumps depending on the shape of a mountain road or road surface. Therefore, a great effect of suppressing the lubricating oil accumulated in the oil storage part from being discharged from the gas discharge port 12 can be obtained.
[0027]
【The invention's effect】
As described above, the flow straightening wall in the compressor of the present invention prevents the lubricating oil surface that is stored in the high-pressure chamber oil storage section from generating undulations and bubbles, and discharging the lubricating oil from the compressor into the system cycle of the air conditioner. Therefore, it is possible to stably supply the lubricating oil to the compression mechanism, so that it is possible to prevent deterioration of the durability of the compressor, such as seizure due to poor lubrication of the compression mechanism.
[0028]
In addition, the supply of lubricating oil that does not contain gas components to the vane back pressure section stabilizes the vane back pressure and stabilizes the reciprocating sliding movement of the vane, thereby preventing compressor noise and vibration. And reliability can be improved.
[0029]
Moreover, since the anti-wave wall is additionally configured in the high-pressure chamber, there is no need to change the external dimensions of the compressor. Furthermore, since the rectifying wall and the high-pressure case can be integrally molded, the number of assembling steps can be reduced, and the productivity can be improved and the manufacturing cost of the compressor can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a compressor showing Embodiment 1 of the present invention. FIG. 2 is a front view of a high-pressure case as viewed from the high-pressure passage side of the compressor. 4 is a cross-sectional view taken along the line AA in FIG. 2. FIG. 5 is a graph showing the characteristics of the compressor. FIG. 6 is a waveform chart showing the characteristics of the compressor. Front view of main part of machine [FIG. 8] AA sectional view of FIG. 7 [FIG. 9] BB sectional view of FIG.
DESCRIPTION OF SYMBOLS 1 Cylinder 2 Low others 3 Vane 4 Drive shaft 5 Front side plate 6 Rear side plate 7 Discharge hole 8 Discharge valve 9 High pressure passage 10 High pressure chamber 10a High pressure chamber oil storage portion 11 High pressure case 12 Gas discharge port 13 Vane back pressure applying device 14 Lubricating oil Supply port 15 Strainer 16 Oil supply passage 17 Vane back pressure part 21 Anti-rippling wall 21a Anti-rippling wall

Claims (1)

A compression mechanism for compressing a gas fluid containing lubricating oil, and a high-pressure chamber having an oil storage unit in which the gas fluid compressed by the compression mechanism is guided and a part of the lubricating oil contained in the gas fluid is separated and stored. And an oil supply passage for supplying the stored lubricating oil to the compression mechanism communicates with the oil storage section, a gas discharge port opening is formed in the high pressure chamber, and the high pressure chamber is connected to the compression mechanism. The compressor is opened so that the gas fluid is directed toward the oil storage section in the high-pressure chamber, and a substantially L-shaped anti-wave wall is formed in the high-pressure chamber so as to be substantially parallel to the surface of the lubricating oil. The oil supply passage communicates with the oil storage portion through between the anti-wave wall and the inner wall of the high-pressure chamber, and the cross-sectional area of the anti-wave wall is 20% of the cross-sectional area inside the high-pressure chamber at the position where the anti-wave wall is formed. with set to 50%, The vertical wall and the lateral width are larger than the width of the gas outlet opening on the wall of the high pressure chamber vertically below the gas outlet opening and on the side where the gas outlet opening is provided. A compressor configured to block the flow of the lubricating oil along the wall surface from the lubricating oil surface toward the gas discharge port opening by providing the protruding portion.

Images