JP2006118365A - Compressor - Google Patents

Abstract

An object of the present invention is to suppress the surface undulation and foaming of a lubricating oil stored in a high-pressure chamber oil storage unit and a decrease in the amount of stored oil in order to improve durability and noise.
By providing an oil level stabilizer 21 having a structure that floats on the surface of a lubricating oil stored in a high pressure chamber oil storage section 10a, the surface of the lubricating oil generated by the flow of compressed air-fluid in the high pressure chamber 10 is provided. In addition to suppressing foaming, a part of the lubricating oil stored in the high-pressure chamber oil storage unit 10a is wound up by the compressed air-fluid flow and discharged from the compressed gas discharge port 12 into the system cycle of the air conditioner. By suppressing this, the decrease in the amount of oil stored is suppressed.
[Selection] Figure 1

Description

  The present invention relates to a compressor used in an automobile air conditioner or the like.

  Conventionally, a high-pressure chamber of this type of compressor has been provided with a mechanism that separates the lubricating oil from the compressed gas fluid and an oil storage section that stores the separated lubricating oil. A vane back pressure application device is used during operation. Then, by supplying the lubricating oil stored in the oil storage part to the vane back pressure part, the function of pushing out the vane from the rotor and the lubrication of the cylinder, vane, rotor and the like are performed (for example, see Patent Document 1).

In such a compressor, the amount of the lubricating oil stored in the high pressure chamber oil storage unit needs to be at least an amount such that the oil level is higher than the lubricating oil supply port below the vane back pressure applying device.
JP-A-62-58082

  However, in the above-described conventional configuration, the surface of the lubricating oil stored in the high pressure chamber oil storage portion is always in a rippled state due to the flow of the gas fluid in the high pressure chamber. When this undulation is large, part of the stored lubricating oil is again wound up in the flow of the gas fluid and discharged from the compressed gas discharge port to the outside of the compressor. For this reason, the amount of lubricating oil in the oil reservoir of the high-pressure chamber is reduced, and a part of the gas fluid is mixed as a gas component from the lubricating oil supply port that should originally supply only the lubricating oil.

  Even when the surface of the lubricating oil and its lower part are bubbled by the undulation of the surface of the lubricating oil, the lubricating oil stored in the high-pressure chamber oil storage part is higher than the lubricating oil supply port at the lower part of the vane back pressure applying device. When the periphery of the supply port becomes foamed, part of the gas fluid compressed from the lubricant supply port is mixed as a gas component.

  Due to the mixing of this gas component, the pressure of the lubricating oil supplied to the vane back pressure part becomes unstable, causing the vane jump phenomenon, and the vibration and noise of the compressor are generated due to the collision between the vane and the cylinder. In addition, due to poor lubrication, there is a problem that the wear of the vane tip is increased and the durability is lowered.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a compressor having a structure that suppresses the undulation and foaming of the lubricating oil surface stored in the high-pressure chamber oil storage part and the reduction in the oil storage amount. .

  In order to solve the above-described conventional problems, the compressor of the present invention includes a substantially horizontal stabilizer that is movable in the vertical direction in the high-pressure chamber, and the stabilizer is placed on the surface of the lubricating oil stored in the oil reservoir of the high-pressure chamber. The structure moves with it.

  This suppresses the undulation and foaming of the lubricating oil surface stored in the high-pressure chamber oil storage part, and a part of the lubricating oil stored in the high-pressure chamber oil storage part is wound up in the flow of gas and fluid from the compressed gas discharge port. It is possible to suppress the discharge of oil into the system cycle of the air conditioner, and to suppress a decrease in the amount of oil stored in the high-pressure chamber oil storage section.

In the compressor according to the present invention, the 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, thereby preventing the vibration and noise of the compressor. It is possible to suppress the wear of the vane tip and improve the durability of the compressor.

  According to a first aspect of the present invention, there is provided a compressor for compressing a gas fluid containing lubricating oil, and the gas fluid compressed by the compression mechanism is guided to separate at least a part of the lubricant contained in the gas fluid. A compressor having a high-pressure chamber having an oil storage portion stored therein, and having a substantially horizontal oil level stabilizing plate movable in a vertical direction in the high-pressure chamber, the oil level stabilizing plate being lubricated in a high-pressure chamber oil storage portion By moving along with the oil surface, the oil level stabilizer is always positioned on the lubricating oil surface even if the lubricating oil level fluctuates due to increase or decrease in the amount of lubricating oil stored in the high pressure chamber oil storage part. Reduces the amount of oil stored in the oil storage section of the high-pressure chamber by suppressing surface undulation and foaming, preventing vibration and noise from the compressor, and suppressing wear at the vane tip to improve the durability of the compressor. Can be improved.

  In the second aspect of the invention, the oil level stabilizer is moved by floating on the surface of the lubricating oil, and can be moved with the oil level with a simple structure.

  In the third aspect of the invention, the oil level stabilizer is moved in a substantially vertical direction along the guide, and the oil level stabilizer is prevented from moving in the horizontal direction. It can move smoothly in a substantially vertical direction without interference.

  According to a fourth aspect of the present invention, the oil level stabilizer is moved in a substantially vertical direction along at least two guides penetrating the oil level stabilizer, and in a horizontal direction of the oil level stabilizer with a simple structure. Can be reliably prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a cross-sectional view of a compressor according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is an operation of an oil level stabilizer according to Embodiment 1 of the present invention. (A) is at the time of oil level rise, (b) is at the time of oil level fall.

  In FIG. 1, 1 is a cylinder having a cylindrical inner wall, 2 is a rotor whose outer periphery forms a minute gap with the inner wall of the cylinder 1, and 3 is slidable in a plurality of vane slots provided in the rotor 2 A plurality of vanes 4 are inserted into the rotor 2, 4 are drive shafts that are integrally formed with the rotor 2 and rotatably supported, and 5 and 6 are front portions that close both ends of the cylinder 1 to form working chambers therein. The side plate and the rear side plate, 7 is a discharge hole for discharging compressed gas 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 passage for guiding the compressed gas fluid to the high pressure chamber 10 , 11 is a high-pressure case forming the high-pressure chamber 10, 12 is a compressed gas discharge port for discharging the compressed gas fluid from the compressor to the system cycle of the air conditioner, 13 is a vane back pressure applying device, and 14 sucks up lubricating oil Lubricating oil supply port, 15 is a vane An oil supply path for supplying lubricating oil to the part, 16 is a vane back pressure part, and the lubricating oil sucked up from the lubricating oil supply port 14 is supplied to the vane back pressure part 16 through the oil supply path 15 via the vane back pressure applying device 13. Has been.

  When the drive shaft 4 and the rotor 2 are rotated by receiving power transmission from a drive source such as an engine, the compressed gas 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. At this time, a part of the lubricating oil is separated from the gas fluid compressed by the collision with the inner wall surface of the high-pressure chamber 10 and stored in the high-pressure chamber oil storage part 10a below the high-pressure chamber. The gas fluid from which a part of the lubricating oil is separated in the high pressure chamber 10 is discharged from the compressed gas discharge port 12.

  The oil level stabilizing plate 21 has a structure floating on the lubricating oil used in the compressor, and even if the lubricating oil level fluctuates due to increase or decrease of the lubricating oil in the high pressure chamber oil storage portion 10a, two oil level stabilizing plates 21 penetrate through the oil level stabilizing plate 21. It is comprised so that it can move to a substantially perpendicular direction along the oil level stabilizer support guide 22 of this. The oil level stabilizer plate support guide 22 suppresses the oil level stabilizer plate 21 from moving in a substantially horizontal direction, and the oil level stabilizer plate 21 smoothly moves in a substantially vertical direction without interfering with other components inside the high pressure chamber 10. Can move.

  About the compressor comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  In FIG. 3, a part of the lubricating oil contained in the compressed gas fluid is separated at the upper part of the high-pressure chamber 10, but the separated lubricating oil A is dropped on the surface of the lubricating oil stored in the high-pressure chamber oil reservoir 10a. Then, ripples occur on the surface of the lubricating oil due to the collision with the dropped lubricating oil. The oil level stabilizer 21 prevents the dropped lubricating oil from directly colliding with the surface of the lubricant, and the lubricant received by the oil level stabilizer 21 is the oil level stabilizer 21, the high-pressure case 11, and the vane back pressure applying device 13. Is stored in the high pressure chamber oil storage part 10a through the gap.

  Further, the compressed gas fluid in the high-pressure chamber 10 rises after vertically downward, and a gas-fluid flow B toward the compressed gas discharge port 12 is generated. Waves are generated on the surface of the lubricating oil stored in the chamber oil storage portion 10a. However, since the oil level stabilizer 21 is structured to float on the lubricating oil, the oil level stabilizer 21 is the surface of the lubricating oil stored in the high pressure chamber oil storage portion 10a. It is always in close contact with the upper surface, and the gas-fluid flow B is prevented from directly colliding with the surface of the lubricating oil, thereby suppressing undulation and foaming on the surface of the lubricating oil.

  At the same time, a part of the lubricating oil stored in the high-pressure chamber oil storage unit 10a is again wound up into the gas-fluid flow and discharged from the compressed gas discharge port 12 into the system cycle of the air conditioner. A decrease in the amount of oil stored in the chamber oil storage unit 10a can be suppressed, and 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.

  Furthermore, since mixing of gas components in the lubricating oil supplied to the vane back pressure part 16 is suppressed and the pressure of the vane back pressure part 16 is stabilized, the vibration and noise of the compressor can be prevented. In addition, the durability of the compressor can be improved by suppressing the wear of the vane tip.

  As described above, the compressor according to the present invention suppresses a decrease in system efficiency while ensuring a high-pressure chamber volume sufficient for reducing the pressure pulsation of the gas fluid discharged from the compressor, and reduces the vibration and noise of the compressor. Since it can suppress and improve durability, it can also be applied to a compressor having other types of compression mechanisms.

Sectional drawing of the compressor in Embodiment 1 of this invention AA sectional view of FIG. 1 (high-pressure case side only) (A) Cross section at the time of oil level rise showing operation of the oil level stabilizer in Embodiment 1 of the present invention, (b) Cross section at the time of oil level descent

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylinder 2 Rotor 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 Compressed gas discharge port 13 Vane back pressure applying device 14 Lubricating oil Supply port 15 Oil supply path 16 Vane back pressure part 21 Oil level stabilizer 22 Oil level stabilizer support guide

Claims (4)

A high-pressure chamber having a compression mechanism for compressing a gas-fluid containing lubricating oil, and an oil storage unit in which the gas-fluid compressed by the compression mechanism is guided and at least a part of the lubricant contained in the gas-fluid is separated and stored A substantially horizontal oil level stabilizer that is movable in the vertical direction in the high-pressure chamber, and the oil level stabilizer moves with the surface of the lubricating oil stored in the oil reservoir in the high-pressure chamber. The featured compressor. The compressor according to claim 1, wherein the oil level stabilizer moves by floating on the surface of the lubricating oil. The compressor according to claim 2, wherein the oil level stabilizer moves in a substantially vertical direction along the guide. The compressor according to claim 2 or 3, wherein the oil level stabilizer moves in a substantially vertical direction along at least two guides penetrating the oil level stabilizer.

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