JP3738148B2 - Gas compressor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas compressor, and more particularly, to a gas compressor that reduces vane wear and also reduces vane chattering.
[0002]
[Prior art]
FIG. 3 shows a cross-sectional view of a gas compressor that has been conventionally used in car air conditioners and the like.
[0003]
In this gas compressor, a rotor 5 is rotatably provided in a cylinder chamber 4 having an inner periphery formed by an elliptical cylindrical shape formed by a front side block 1, a rear side block 2, and a cylinder 3. As shown in the cross-sectional view of FIG. 3, vanes 7 are slidably mounted in the plurality of vane grooves 6, respectively.
[0004]
The cylinder chamber 4 is partitioned into a plurality of compression chambers 8 by the vanes 7, and the compression chambers 8 repeatedly change in capacity by the rotation of the rotor 5, and compress the low-pressure refrigerant gas by the capacity change. The compressed high-pressure refrigerant gas passes through the discharge port 13 and the discharge valve 14 and is discharged into the discharge chamber 11.
[0005]
The oil in the oil reservoir 12 is pressurized by the high-pressure refrigerant gas after compression in the discharge chamber 11. A vane chamber 9 to which a pressure for sliding the vane 7 is applied is formed by the vane groove 6 and the vane 7, and the vane chamber 9 and the oil reservoir 12 communicate with each other through a passage 16.
[0006]
Accordingly, the oil in the oil reservoir 12 passes through the passage 16 and is supplied to the vane chamber 9 through the Sarai groove 10, and the vane 7 slides according to the rotation of the rotor 5 to compress the high-pressure refrigerant gas.
[0007]
[Problems to be solved by the invention]
However, the conventional gas compressor has the following problems.
[0008]
The conventional gas compressor can compress and discharge the refrigerant gas by the rotor 5 and the vane 7, but when the oil pressure from the oil reservoir 12 flowing into the vane chamber 9 is high, the pressure of the vane chamber 9 The vane 7 is strongly pressed against the inner wall 4a of the cylinder chamber 4, and the wear of the vane 7 increases, and the power loss of the gas compressor may increase.
[0009]
Therefore, a throttle 15 is provided in the passage 16 to reduce the pressure of the oil from the oil reservoir 12 flowing into the vane chamber 9. In this way, the pressure of the oil from the oil reservoir 12 flowing into the vane chamber 9 is reduced. In this case, since the pressing force of the vane 7 is reduced and chattering (slight vibration) may occur in the vane 7, there is a problem that the oil pressure of the vane 7 cannot be reduced below a certain value.
[0010]
Therefore, as shown in FIG. 5, the salai groove 10 is cut and oil from the oil reservoir 12 is supplied from the passage 16 to the vane chamber 9 through the outer peripheral surface 5 a of the rotor shaft 17 and the salai groove 10. Proposed. According to this, the oil from the oil reservoir 12 is decompressed by passing through the outer peripheral surface 5a, and is supplied to the vane chamber 9 from the Saray groove 10 when compressed, and the oil from the oil reservoir 12 passes through the passage 21, When the gas is discharged, the gas is supplied to the vane chamber 9 from the hydraulic pressure supply hole 22.
[0011]
In this case, a pressure difference occurs between the hydraulic pressure that is reduced in pressure through the outer peripheral surface 5a and supplied to the vane chamber 9 from the Sarai groove 20 and the hydraulic pressure that is supplied to the vane chamber 9 from the hydraulic pressure supply hole 22 through the passage 21. When the hydraulic pressure from the oil reservoir 12 is reduced to reduce the hydraulic pressure that is reduced through the surface 5a and supplied from the saray groove 20 to the vane chamber 9 to a desired hydraulic pressure, the hydraulic pressure is supplied from the oil supply hole 22 to the vane chamber 9. There was a problem that the hydraulic pressure supplied also decreased, and chattering was insufficiently prevented.
[0012]
This invention is made | formed in view of the above, Comprising: While reducing wear of a vane, it aims at providing the gas compressor which also reduces chattering of a vane.
[0013]
[Means for Solving the Problems]
Therefore, a gas compressor according to the present invention includes a rotor that is rotatably provided in a cylinder chamber having an inner circumferential elliptical cylinder, and a vane that is slidably mounted in a vane groove provided in the rotor. In a gas compressor that compresses and discharges gas by rotation of a rotor, the gas compressor has a vane chamber to which a pressure for sliding the vane is applied , and an oil reservoir for storing oil to be supplied to the vane chamber, The vane chamber from the oil reservoir through a passage communicating with the oil reservoir during compression of the gas, a throttle communicating with the passage, and a plurality of Sarai grooves provided close to a side surface of the rotor. On the other hand, when the compressed gas is discharged, the oil is supplied via a high-pressure supply passage provided independently of the passage and a high-pressure supply hole provided between the plurality of salai grooves. From the oil sump Characterized in that it is a high pressure supplied to the serial vane chamber.
[0014]
The high-pressure supply holes are provided in the front side block and the rear side block, respectively .
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a gas compressor used for a car air conditioner and the like according to the present invention will be described in detail with reference to FIGS. 1 and 2.
[0016]
In FIGS. 1 and 2, the same members as those of the conventional members shown in FIGS. 3 to 5 are denoted by the same reference numerals.
[0017]
FIG. 1 relates to a gas compressor according to the present invention, and shows a hydraulic pressure supply unit 30 to a vane 7 provided in a rear side block 2 of the gas compressor. FIG. 1 (A) is provided with a hydraulic pressure supply unit 30. 1B is a plan view of the rear side block 2 viewed from the rotor 5 side, and FIG. 1C is a cross-sectional view taken along line EE of FIG. 1B.
[0018]
The hydraulic pressure supply unit 30 includes a passage 31, a throttle 32, a branch passage 31 a, a high pressure supply passage 40, and a high pressure supply hole 42. As shown in FIG. 1A, the passage 31 communicates with the oil reservoir 12, and the hydraulic pressure from the oil reservoir 12 is reduced by the throttle 32 and supplied to the annular groove 34. As shown in FIG. 1C, the hydraulic pressure supplied to the annular groove 34 is reduced in pressure by a gap 35 between the outer peripheral surface 5a and the rear side block 2, and supplied to a plurality (two in this embodiment) of the Sarai grooves 20 and 20. Is done. The hydraulic pressure supplied to the salai groove 20 is supplied from the salai groove 20 to the vane chamber 9 in the refrigerant gas compression region (ii) of the vane 7 as shown in FIG.
[0019]
As shown in FIG. 1C, the high-pressure supply path 40 that is directly connected to the oil sump 12 is provided in the rear side block 2 and is connected to the high-pressure supply hole 42 via the passage 40a. As shown in FIG. 1 (B), the high-pressure supply hole 42 is provided in a compressed refrigerant gas discharge region (b) between the two salai grooves 20, 20. High pressure oil is supplied to the vane chamber 9 from the high pressure supply hole 42.
[0020]
FIG. 2 shows the flow of oil from the oil reservoir 12 to the vane chamber 9. The high-pressure supply of oil from the oil reservoir 12 to the vane chamber 9 is performed by connecting the high-pressure supply path 40 to the high-pressure supply hole 42, so that high-pressure oil from the oil reservoir 12 is discharged from the high-pressure supply hole 42 to the vane chamber 9. To be supplied.
[0021]
The supply of the reduced pressure oil from the oil reservoir 12 to the vane chamber 9 will be described. The passage 31 communicates with the oil reservoir 12, and the hydraulic pressure from the oil reservoir 12 is reduced by the throttle 32 and further reduced by the gap 35. Supplied to the saray groove 20. The hydraulic pressure supplied to the salai groove 20 is supplied to the vane chamber 9 from the salai groove 20 in the refrigerant gas compression region (a) of the vane 7.
[0022]
A branch passage 31 a shown in FIG. 1 passes through the cylinder 3 and the front side block 1 and communicates with a salai groove 20 (not shown) provided in the front side block 1. The hydraulic pressure is reduced and supplied to the vane chamber 9. In this case, the high-pressure supply path 40 is also connected to a high-pressure supply hole 42 (not shown) provided in the front side block 1, and high-pressure oil from the oil reservoir 12 is supplied to the vane chamber 9 from the high-pressure supply hole 42. An operation similar to that of the hydraulic pressure supply unit 30 provided in the rear side block 2 is performed.
[0023]
As described above, the hydraulic pressure is supplied to the vane chamber 9 by supplying high-pressure oil from the oil reservoir 12 to the vane chamber 9 from the high-pressure supply hole 42 when the refrigerant gas is discharged. Since the low-pressure oil decompressed at 35 is supplied from the saray groove 20 to the vane chamber 9, the wear of the vane 7 with the cylinder can be reduced and the occurrence of chattering can be prevented. Durability can be improved.
[0024]
In addition, although the gas compressor of the said Example described the example which uses refrigerant | coolant gas, it can be used about the thing which compresses other gas without being limited to this.
[0025]
【The invention's effect】
A gas compressor according to the present invention includes a rotor that is rotatably provided in a cylinder chamber having an inner circumference of an elliptic cylinder, and a vane that is slidably mounted in a vane groove provided in the rotor. In a gas compressor that compresses and discharges gas by rotation, the gas compressor has a vane chamber to which a pressure for sliding the vane is applied , and an oil reservoir for storing oil to be supplied to the vane chamber, and the oil is a gas The oil reservoir is depressurized from the oil reservoir to the vane chamber via a passage communicating with the oil reservoir, a throttle communicating with the passage, and a plurality of Sarai grooves provided close to a side surface of the rotor. On the other hand, when the compressed gas is discharged, the oil is supplied via a high-pressure supply passage provided independently of the passage and a high-pressure supply hole provided between the plurality of Saray grooves. From the oil sump It was to be the high pressure supply to the chamber. This prevents the occurrence of chattering can be reduced the wear of the cylinder of the vane, it is possible to improve reduction in use the power and durability of the vane.
[0026]
Further, the high pressure supply hole, since the front side block and the rear side block and so respectively provided, it is possible to supply a balanced hydraulic pressure to the vane chamber can with the chattering reduce wear of the cylinder of the vane Generation | occurrence | production can be prevented and the use power can be reduced and the durability of the vane can be improved.
[Brief description of the drawings]
FIG. 1 is a side view of a gas compressor according to the present invention.
FIG. 2 is an explanatory diagram of the flow of oil from the oil reservoir to the vane chamber.
FIG. 3 is a cross-sectional view of a gas compressor that has been conventionally used in car air conditioners and the like.
FIG. 4 is a cross-sectional view of a rotor in which vanes are slidably mounted in a plurality of vane grooves (cross-sectional view of FIG. 3).
FIG. 5 is an explanatory view of a conventional example in which a salai groove is cut and a hydraulic pressure is supplied to a vane chamber.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front side block 2 Rear side block 3 Cylinder 4 Cylinder chamber 5 Rotor 6 Vane groove 7 Vane 8 Compression chamber 9 Vane chamber 10 Salai groove 11 Discharge chamber 12 Oil reservoir 16, 21, 31 Passage 17 Rotor shaft 20 Salai groove 22 Hydraulic supply hole 30 Hydraulic supply section 32 Restriction 31a Branch passage 34 Annular groove 40 High pressure supply path 42 High pressure supply hole

Claims (2)

A rotor that is rotatably provided in a cylinder chamber whose inner periphery is an elliptic cylinder, and a vane that is slidably mounted in a vane groove provided in the rotor, and compresses and discharges gas by the rotation of the rotor. In the gas compressor that
A vane chamber to which pressure is applied to slide the vane ;
An oil sump for storing oil to be supplied to the vane chamber;
The oil is
When the gas is compressed, the oil reservoir enters the vane chamber via a passage communicating with the oil reservoir, a throttle communicating with the passage, and a plurality of Sarai grooves provided close to a side surface of the rotor. While being supplied with reduced pressure,
The oil is
When the compressed gas is discharged, a high pressure is supplied from the oil reservoir to the vane chamber via a high pressure supply path provided independently of the passage and a high pressure supply hole provided between the plurality of Saray grooves. A gas compressor characterized by being supplied . The high-pressure supply hole is
The gas compressor according to claim 1, wherein the gas compressor is provided in each of the front side block and the rear side block .

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