JP2004251209A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor having a structure for suppressing waving/foaming of oil level of lubricating oil stored in a high pressure chamber oil storage part 10a and reduction of stored oil amount to improve durability and reduce noise. <P>SOLUTION: This compressor is provided with a compression mechanism for compressing a gaseous fluid containing lubricating oil and a high pressure chamber having the oil storage part in which a part of lubricating oil contained in the gaseous fluid is separated and stored, and an oil supply passage for supplying lubricating to the compression mechanism is communicated with oil stored in the oil storage part. A substantially horizontal waving prevention wall 21 occupying a part of inner side cross sectional area of the high pressure chamber is provided in the high pressure chamber 10. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a compressor for compressing gaseous fluid, and for example, to a compressor used for 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, the lubricating oil stored in the high pressure chamber oil storage section is used using a vane back pressure applying device or a mechanism equivalent thereto. Is supplied to the vane back pressure portion to push the vane out of the rotor, and to lubricate the cylinder, vane, rotor and the like (for example, see Patent Documents 1 and 2).
[0003]
In such a compressor, a part of the compressor lubricating oil is always discharged into the refrigeration cycle together with the compressed gas fluid.
[0004]
[Patent Document 1]
JP-A-62-58082 (page 3-4, FIG. 1-2)
[Patent Document 2]
JP-A-56-107992 (page 2-3, FIG. 2)
[0005]
[Problems to be solved by the invention]
By the way, in the above-mentioned compressor, it is necessary that the lubricating oil stored in the high-pressure chamber oil storage section has at least an oil level higher than the lubricating oil supply opening position.
[0006]
The lubricating oil surface stored in the high-pressure chamber oil storage section is always in a wavy state and a foamed state due to the flow of the compressed gas and fluid.
[0007]
Therefore, in the case of large undulations and bubbling, a part of the lubricating oil is caught in the compressed gas-fluid flow and discharged from the gas outlet of the compressor into the refrigeration cycle, and the lubricating oil in the high-pressure chamber oil storage section The amount decreases.
[0008]
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 lubricating oil is to be supplied. When this gas component is mixed, the pressure of the lubricating oil supplied to the back pressure portion of the vane becomes unstable, a jump phenomenon of the vane occurs, and a problem of vibration and noise of the compressor due to collision between the vane and the cylinder occurs. In addition, the jump phenomenon results in increased wear of the vane tip, resulting in reduced durability and reliability.
[0009]
In particular, when the gas discharge port of the compressor is provided in a substantially horizontal direction, the lubricating oil in the oil storage section is easily discharged during the system cycle of the air conditioner because the lubricating oil surface of the oil storage section is close to the gas discharge port. Also, in vehicles, since the vehicle is tilted due to the condition of mountain roads and road surfaces, the compressor may be tilted from the normal state, and the amount of lubricating oil in the high pressure chamber oil storage section discharged into the system cycle of the air conditioner further increases. It increases the system efficiency of the air conditioner. Further, since the amount of lubricating oil in the high pressure chamber oil storage section is reduced, problems such as seizure of the compressor, abrasion of the vane, and noise are caused, and reliability and durability are reduced.
[0010]
The present invention has been made in view of the above-described conventional problems, and has an object to provide a compressor having a structure with a simple configuration that prevents waving and foaming of a lubricating oil surface stored in a high-pressure chamber oil storage unit and suppresses a decrease in an oil storage amount. Aim.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, in the compressor according to the present invention, an anti-ripening wall is formed in the high-pressure chamber of the compressor so as to be substantially parallel to the lubricating oil surface, and the horizontal area of the anti-ripening wall is reduced. The configuration is 20 to 50% of the cross-sectional area of the high pressure chamber side at the wall position, and the position of the anti-ripening wall is substantially the same as the lubricating oil level of the oil storage section in the standard condition of the air conditioning system.
[0012]
If the anti-ripening wall is above the lubrication surface of the oil storage section in the standard condition of the air conditioning system, the leveling of the anti-ripening wall in the standard condition cannot be suppressed. -It is recommended to set the anti-rip position according to the configuration and application.
[0013]
The anti-ripening wall set in this way suppresses undulation and foaming of the lubricating oil surface stored in the oil storage section of the high-pressure chamber, and a part of the undulating and foaming lubricating oil is entrained in the flow of gaseous fluid to control the air conditioner. It is also suppressed from being discharged during the system cycle. In addition, a decrease in the amount of lubricating oil in the oil storage section can be suppressed.
[0014]
This suppresses the mixing of gas components into the lubricating oil supplied to the vane back pressure portion, stabilizes the pressure of the vane back pressure portion, and prevents the occurrence of vibration and noise of the compressor. Further, wear of the vane tip can be suppressed, and the durability of the compressor can be improved.
[0015]
In addition, by forming the anti-ripening 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, part of the lubricating oil stored in the high-pressure chamber oil storage part is compressed. Discharge to the outside of the machine can be further suppressed.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
(Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. 1 to 4, reference numeral 1 denotes a cylinder having a cylindrical inner wall, 2 denotes a rotor having a part of its outer periphery forming a minute gap with the inner wall of the cylinder 1, and 3 denotes a plurality of vane slots provided in the rotor 2. A plurality of vanes 4 slidably inserted are formed integrally with the rotor 2, and the drive shafts 5, 6 are rotatably supported on the rotors 5, 6 respectively close both ends of the cylinder 1 to form a working chamber therein. A front side plate and a rear side plate, 7 is a discharge hole for discharging the compressed fluid from the high pressure side working chamber, 8 is a discharge valve arranged in the discharge hole, 9 is a high pressure pipe 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 formed integrally with the high-pressure case 11.
[0017]
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 a lower portion of the vane back pressure applying device 13, Reference numeral 15 denotes a strainer for preventing inflow of dust and fine metal fragments, reference numeral 16 denotes an oil supply passage, reference numeral 17 denotes a vane back pressure unit, and the lubricating oil stored in the oil storage unit 10a below the high pressure chamber 10 by a vane back pressure applying device 13. The lubricating oil is supplied from a lubricating oil supply port 14 to a vane back pressure unit 17 through an oil supply passage 16.
[0018]
When the drive shaft 4 and the rotor 2 rotate upon receiving power transmission from a drive source such as an engine, the compressed high-pressure fluid pushes up the discharge valve 8 from the discharge hole 7 and flows into the high-pressure chamber 10 through the high-pressure passage 9, and the high-pressure fluid The gas is discharged to the outside 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.
[0019]
The anti-ripening wall 21 smoothes the fluid flowing from the high-pressure passage 9 toward the gas discharge port 12, thereby suppressing the waving and foaming of the lubricating oil stored in the high-pressure chamber oil storage unit 10 a, and providing the high-pressure chamber oil storage unit 10 a with lubrication oil. It is possible to suppress a part of the stored lubricating oil from flowing out of the compressor again along the flow of the fluid, and to suppress a decrease in the amount of stored oil as shown in FIG. Thereby, the lubricating oil can be stably supplied from the lubricating oil supply port 14 of the vane back pressure applying device 13 to the compression mechanism.
[0020]
Further, by supplying lubricating oil containing no gas component to the vane back pressure portion, the vane back pressure is stabilized, the reciprocating sliding motion of the vane is stabilized, and noise and vibration of the compressor are generated as shown in FIG. Can be prevented, and the reliability can be improved.
[0021]
Further, since the anti-ripening wall 21 is formed so as to block the flow along the wall surface from the lubricating oil surface toward the gas outlet opening 12 in the high-pressure chamber 10, the lubricating oil stored in the high-pressure chamber oil storage portion 10a is formed. Can be further suppressed from being discharged to the outside of the compressor.
[0022]
Then, it was confirmed that when the cross-sectional area of the anti-ripening wall 21 was 20 to 50% of the cross-sectional area inside the high-pressure chamber 10 at the position where the anti-ripening wall 21 was formed, the above-described effect was obtained. If it is less than 20%, the effect of suppressing the lubricating oil from waving or foaming may be reduced. If it exceeds 50%, the degree of freedom in arranging the lubricating oil supply port 14 is hindered and the lubricating oil returns to the oil storage unit 10a. In some cases, smooth operation cannot be performed.
[0023]
Note that the anti-ripening wall 21 suppresses undulation and bubbling of the high-pressure chamber oil storage unit 10a. Therefore, the anti-ripening wall 21 is provided at the position where the entire amount of the lubricating oil in the refrigeration cycle is sealed in the high-pressure chamber oil storage unit 10a. Lower than the surface height.
[0024]
(Embodiment 2)
Embodiment 2 of the present invention is a case where the gas outlet 12 is close to the oil storage section as shown in FIG. The ripple preventing wall 21 is formed at a lower portion near the gas outlet 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 outlet, and the dimension is changed on a case-by-case basis.
[0025]
In the second embodiment, the same effects as in the first embodiment are obtained, and the lubricating oil accumulated in the high-pressure chamber oil storage unit 10a or the turbulence / bubbles of the lubricating oil surface of the high-pressure oil storage unit due to the fast gas flow compressed by the compressor are obtained. This has the effect of suppressing that part of the lubricating oil is discharged from the gas discharge port 12. Particularly, in the case of a vehicle, since the vehicle is inclined or jumps due to the shape of a mountain road or a road surface, a great effect of suppressing the lubricating oil accumulated in the oil storage portion from being discharged from the gas discharge port 12 can be obtained.
[0026]
【The invention's effect】
As described above, the rectifying wall in the compressor of the present invention prevents the lubricating oil surface stored in the high-pressure chamber oil reservoir from waving and foaming, and discharging the lubricating oil from the compressor during the system cycle of the air conditioner. Since the lubricating oil can be supplied to the compression mechanism in a stable manner, deterioration of the durability of the compressor such as burn-in due to poor lubrication of the compression mechanism can be prevented.
[0027]
Also, by supplying lubricating oil containing no gas component to the vane back pressure portion, the vane back pressure is stabilized, and the reciprocating sliding motion of the vane is stabilized, thereby preventing compressor noise and vibration. And reliability can be improved.
[0028]
Further, since the anti-ripening wall is additionally provided 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 are configured to be integrally formed, the number of assembling steps can be reduced, 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 according to a first embodiment of the present invention. FIG. 2 is a front view of a high-pressure case viewed from a high-pressure passage side of the compressor. FIG. 3 is a cross-sectional view of a high-pressure case of the compressor. 4 is a sectional view taken along line AA of FIG. 2; FIG. 5 is a graph showing characteristics of the compressor; FIG. 6 is a waveform diagram showing characteristics of the compressor; FIG. 7 is a compression diagram according to Embodiment 2 of the present invention; FIG. 8 is a sectional view taken along line AA of FIG. 7; FIG. 9 is a sectional view taken along line BB of FIG. 7;
DESCRIPTION OF SYMBOLS 1 Cylinder 2 Row etc. 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 unit 11 High pressure case 12 Gas outlet 13 Vane back pressure applying device 14 Lubricating oil Supply port 15 Strainer 16 Oil supply path 17 Vane back pressure portion 21 Rippling prevention wall 21a Rippling prevention wall

Claims (3)

A compression mechanism for compressing a gaseous fluid containing lubricating oil, and a high-pressure chamber having an oil storage section in which the gaseous fluid compressed by the compression mechanism is guided and a part of the lubricating oil contained in the gaseous fluid is separated and stored. In the compressor, an oil supply passage for supplying the stored lubricating oil to the compression mechanism communicates with the oil storage unit, wherein the anti-ripening wall is formed in the high-pressure chamber so as to be substantially parallel to the lubricating oil surface. The cross-sectional area of the anti-ripening wall is 20 to 50% of the cross-sectional area of the high-pressure room at the position where the anti-ripening wall is formed. 2. The compressor according to claim 1, wherein the anti-ripening wall is formed so as to be located below an oil level when the entire amount of the lubricating oil in the refrigeration cycle is sealed in the high-pressure chamber oil storage portion. A gas outlet opening is formed in the high-pressure chamber, and the anti-ripening wall is formed at a position where the flow of lubricating oil along a wall surface from the lubricating oil surface to the gas outlet opening is blocked. The compressor according to claim 1 or 2, wherein

Images