JP2001349292A - Gas compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas compressor that can reduce noise, for example, from an evaporator connected by piping to a suction opening, can improve the durability of a lip seal and can improve the accuracy of a change in capacity all via a simple structure. SOLUTION: The gas compressor 10 has a suction opening 61 on a front side block 65 side and a capacity control plate 51 on the discharge side of a cylinder 4, and an oil, passage 91 supplies oil gathered in a discharge chamber 19 direct to an oil sump 89. Oil pressurized by high-pressure refrigerant gas works direct on the left end face of a rotary shaft 6. The rotary shaft 6 is then pressed rightward by the high pressure during an operation. Pressing force acting leftward on the capacity control plate 51 is thus reduced, so that the accuracy of a change in capacity is kept intact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas compressor, and more particularly, to a simple structure for reducing abnormal noise of an evaporator and the like connected to a suction port and piping and improving durability of a lip seal. Further, the present invention relates to a gas compressor capable of improving the accuracy of a capacity change.

[0002]

2. Description of the Related Art There is known a variable displacement gas compressor which is mounted on an automobile and used for cooling and heating the interior of the automobile. For example, the gas compressor disclosed in Japanese Patent No. 2832869 is configured such that a rotation shaft having a rotation transmission means at an end is held in a front head, a front side block, a cylinder, and a rear side block arranged from the rotation transmission means side. Is done.

[0003] The rear side block has an inlet,
Each of the front heads has a discharge section, and
A displacement control plate is rotatably provided between the cylinder and the rear side block, and the displacement of the compression chamber is controlled by changing its angular position.

The gas compressor sucks refrigerant gas from an evaporator connected to a suction port, compresses the refrigerant gas, and discharges the compressed gas. The refrigerant gas is sent from the discharge chamber to the external condenser through the discharge port. Then, the discharge capacity is adjusted by rotating the capacity control plate.

[0005]

However, in the gas compressor having the above-described structure, a discharge chamber that becomes high in temperature is disposed on the front side. For this reason, the lip seal provided inside the discharge-side front head is exposed to a high-temperature atmosphere, and the rubber material of the lip seal has a problem in terms of durability.

[0006] A capacity control plate is arranged on the suction chamber side. Because of this, the suction chamber volume is reduced accordingly, and the distance from the capacity control plate to the suction port is short, so that it is easily affected by the pressure pulsation due to the suction gas generated in the capacity control plate section, and Resonance or the like may occur in the connected evaporator, and vibration or abnormal noise may occur.

The generation of the vibration and the abnormal noise is caused by the refrigerant gas once sucked into the compression chamber being returned to the suction side space.
It is thought to be due to pressure pulsations occurring in the suction chamber. This pressure pulsation is transmitted to the suction port side, and the effect is particularly remarkable when the compression volume is reduced by the capacity control plate.

The present invention has been made in view of such a conventional problem, and has a simple structure to reduce abnormal noise of an evaporator or the like connected to a suction port and a pipe and to improve durability of a lip seal. Further, it is another object of the present invention to provide a gas compressor capable of improving the accuracy of the capacity change.

[0009]

According to the present invention, there is provided a cylinder sandwiched between a front side block and a rear side block, a cylinder penetrating the cylinder and the front side block, and having one end inside the rear side block. , A rotor fixed to the rotating shaft, a plurality of vanes that can be extended and retracted in the radial direction of the rotor, and slidably disposed with respect to the vane, the rotor and the cylinder, A rotatable capacity control plate, a compression chamber that sucks, compresses, and discharges refrigerant gas by turning the vane that partitions the inside of the cylinder in accordance with the turning angle position of the capacity control plate, and the rear side block. A discharge chamber formed inside the disposed case, wherein oil is separated from the refrigerant gas discharged from the compression chamber; and a refrigerant gas is discharged from the discharge chamber. A discharge port for discharging pressure, an oil passage for supplying oil accumulated in the discharge chamber for operation of the vane and / or lubrication of the rotating shaft, and an oil passage disposed at the other end of the rotating shaft. And a lip seal that slides on the rotation shaft, and
A front head that covers the front side block; and a suction port formed in the front head for sucking refrigerant gas, wherein the capacity of the compression chamber is changed by rotating the capacity control plate. It is characterized by.

Refrigerant gas is sucked from an evaporator or the like connected to the suction port of the gas compressor having the above configuration. The cylinder is sandwiched between the front side block and the rear side block. The rotating shaft penetrates the cylinder and the front side block, and has one end reaching the inside of the rear side block.

[0011] A rotor is fixed to the rotating shaft.
A plurality of vanes are disposed in the radial direction of the rotor so as to be able to come and go. The displacement control plate is rotatable around the rotor and is slidably disposed on the vane, the rotor and the cylinder. The compression chamber is formed between the cylinder, the vane, the rotor, the front side block or the rear side block, and the capacity control plate, and performs suction, compression, and discharge of the refrigerant gas.

The discharge chamber is formed inside the case, and oil is separated from the refrigerant gas discharged from the compression chamber. At the discharge port, refrigerant gas is discharged from the discharge chamber at a discharge pressure. In this case, since the suction port is disposed on the front side block side and the case of the discharge chamber is disposed on the rear side block, refrigerant gas to be compressed is sucked from the front side block side, and the compressed gas is transmitted from the rear side. Discharged.

Therefore, the lip seal portion of the front head is not exposed to the high temperature due to the compressed gas on the discharge side, but is maintained at a low temperature. As a result, the heat resistance condition of the lip seal portion is eased. By relaxing the heat-resistant condition, the durability of the lip seal is improved, or the applicable heat-resistant specification range is expanded.

According to the present invention, the displacement control plate is arranged on the discharge chamber side of the cylinder.

In the case where the displacement control plate is disposed on the discharge chamber side, two large spaces formed by the compression chamber and the suction chamber and a communication passage therebetween are secured between the displacement control plate and the suction port. The silencer effect due to the complicated cross section change and the damping effect due to the long path to the suction port occur.

By these two effects, the influence of the pulsation generated between the displacement control plate and the compression chamber at the suction port is reduced, so that abnormal noise and vibration of the evaporator connected to the suction port are suppressed. .

Further, according to the present invention, the first fastening means for integrally fixing the front head and the rear side block at an outer peripheral portion thereof, and the front side is provided on the inner peripheral side of the first fastening means. A second fastening means for integrally fixing the block and the cylinder is provided.

Since the front head is fixed to the rear side block by the first fastening means, the first fastening means can select a position near the outer peripheral portion of the cylinder and avoiding a space in the front head. .

Therefore, the second fastening means of the front side block does not penetrate the front head,
Since it can be configured in a space covered by the front head, it is possible to ensure airtightness of the front head. Therefore, it is not necessary to increase the number of parts and the body diameter, and it is possible to prevent gas leakage from the suction portion with a simple configuration.

Further, according to the present invention, an oil sump is formed in the rear side block facing the end face of the rotor, and the oil sump is formed on the rear side block via a rear bearing that receives the rotating shaft. And receiving oil from the oil passage.

The discharge pressure is guided from the discharge chamber to the bearing portion of the rotary shaft inside the rear side block. This discharge pressure is attenuated by the rear bearing portion to a pressure approximately between the discharge pressure and the suction pressure, and the pressing force acting in the axial direction from the oil reservoir to the end face of the rotor and between the rotor and the displacement control plate is reduced. Hang in the direction.

Therefore, in the gas compressor according to the present invention, the pressing force acting between the rotor and the displacement control plate is reduced by the oil passage and the oil reservoir, so that the control performance of the displacement control plate for varying the displacement is improved. However, loss of shaft power can be reduced.

Further, according to the present invention, the discharge pressure is guided to the space inside the rear side block which is in contact with the end face of the rotating shaft, and the discharge pressure is in the axial direction, and is fixed to the rotor and the capacity control plate. It is characterized in that the pressing force acting therebetween is applied in a direction to be weakened.

The discharge pressure is directly led to the shaft end of the rotary shaft inside the rear side block, and this large discharge pressure is applied in a direction in which the pressing force acting between the rotor and the displacement control plate is weakened. If weakened, the co-rotating force on the displacement control plate will be reduced or eliminated.

As a result, it is possible to eliminate the problems of the rotation behavior such as the hysteresis and the inability to control the displacement of the displacement control plate, as well as to improve the control performance of the displacement control plate for changing the displacement, and to reduce the power loss of the shaft power. Can be reduced.

Further, according to the present invention, the oil accumulated in the discharge chamber is supplied to the space, and an axial pressing force is applied to the end face of the rotary shaft by the discharge pressure transmitted to the oil. It is characterized by having.

The discharge pressure guided to the space in contact with the end face of the rotating shaft inside the rear side block can be either of a refrigerant gas or oil.
According to the present invention, by using oil as the discharge pressure, a pressing force is applied to the end face of the rotating shaft, and the rotating shaft bearing formed between the rotating shaft and the rear side block and between the rotor and the rear side block can be lubricated. I can do it.

Further, according to the present invention, a rotation shaft provided with a rotation transmitting means at the shaft end and having a plurality of vanes radially protrudable and retractable via a rotor, and a rotation transmission of the rotation shaft A front side block that supports the device side through the shaft, a rear side block that supports the shaft end opposite to the rotation transmitting means of the rotary shaft, both ends are closed by the front side block and the rear side block, and the vane is closed. A cylinder slidably provided to form a compression chamber, a suction port formed to communicate with a suction position of the cylinder via one of the front side block or the rear side block, and A discharge chamber formed to communicate with a discharge position of the cylinder via the other side of the rear side block; It faces on the compression chamber da discharge chamber side,
And a displacement control plate for controlling a compression timing by a rotation operation.

In the gas compressor, the displacement control plate is disposed on the discharge chamber side of the cylinder. Therefore, in any of the configuration in which the refrigerant gas is sucked in from the front side block side and discharged to the rear side block side, and the configuration in which the refrigerant gas is sucked in from the rear side block side and discharged to the front side block side,
Two large spaces between the compression chamber and the suction chamber are interposed between the displacement control plate and the suction port.

The pulsation generated between the displacement control plate and the compression chamber with respect to the suction port is caused by the silencer effect due to the change in the cross-sectional area of the compression chamber, the suction chamber, and the communicating portion thereof, and the damping effect by the long path to the suction port. The influence is reduced, and abnormal noise and vibration of an evaporator or the like connected to the suction port can be reduced.

Further, according to the present invention, a rotation shaft provided with a rotation transmitting means at a shaft end, a front side block for inserting and supporting the rotation transmitting side of the rotation shaft, and a rotation transmitting means of the rotation shaft A rear side block that supports a shaft end on the opposite side, a cylinder forming a compression chamber, a suction port formed to communicate with a suction position of the cylinder, and a discharge chamber formed to communicate with a discharge position of the cylinder. And a front head that covers the front side block;
Fastening means for integrally fixing the front head and the rear side block at an outer peripheral portion thereof;

In the above gas compressor, since the fastening means between the front head and the rear side block is located on the outer peripheral portion, a large space can be formed on the inner peripheral side as a suction chamber, and the cross-sectional area of the suction passage can be increased. Because a large change can be taken, a greater silencer effect is obtained,
Pulsation on the suction side can be suppressed, and abnormal noise and vibration of an evaporator or the like connected to the suction port can be reduced.

When the front head is fixed to the cylinder as in the prior art, a fastening bolt has to be arranged also on the inner peripheral side of the cylinder. However, when the front head is fastened to the rear side block at a position near the outer peripheral portion of the cylinder, bolts and the like can be arranged avoiding the space in the front head, so that the airtightness inside the front head can be easily secured. .

[0034]

Embodiments of the present invention will be described below. FIG. 1 is a sectional view of a gas compressor 10 according to a first embodiment of the present invention, and FIG.
FIG.

The gas compressor 10 is mounted on an automobile and is used for cooling and heating the interior of the automobile. The inlet 61 is
A refrigerant gas is formed between the front head 63 and the front side block 65 and is drawn in from an evaporator (not shown) connected to the outside.

The cylinder 4 includes a front side block 6
5 and the rear side block 67. The rotating shaft 6 penetrates the cylinder 4, the front head 63, and the front side block 65, and one end 6a thereof reaches inside the rear side block 67. A rotor 5 is rotatably disposed in the cylinder 4.

The rotor 5 is fixed to the rotating shaft 6 so as to pass therethrough. A vane groove 12 is formed on the outer peripheral surface of the rotor 5 in a radial direction, and a vane 13 is slidably mounted in the vane groove 12. The vane 13 is urged against the inner wall of the cylinder 4 by the centrifugal force and the oil pressure at the bottom of the vane groove 12 communicating with the oil sump 81 when the rotor 5 rotates.

The inside of the cylinder 4 is partitioned into a plurality of small chambers by a rotor 5 and a vane 13. These small chambers are referred to as compression chambers 14, and the volume changes repeatedly as the rotor 5 rotates.

As described above, when the rotor 5 rotates, the low-pressure refrigerant gas is sucked from the suction port 61, and the volume is changed to perform compression. A case 52 is fixed to the end of the rear side block 67, and inside the case 52,
A discharge chamber 19 is formed.

The other end 6b of the rotating shaft 6 is connected to the front head 6
An armature 33 is fixed to the outside from the outside. The armature 33 is electromagnetically attracted to the pulley 31 serving as a rotation transmitting means. Power is transmitted to the pulley 31 from a crank pulley of an automobile engine (not shown).

The front head 63 has a lip seal 63 a made of a rubber material for sealing the rotary shaft 6, and is attached so as to cover the front side block 65. The oil passage 83 communicates from the discharge chamber 19 to the rear bearing 85, and the oil passage 77 communicates from the discharge chamber 19 to the front bearing 79.

An oil sump 89 at the shaft end and an oil sump 87 facing one end surface of the rotor 5 are formed in the rear side block 67 adjacent to the rear bearing 85 and the front bearing 79
An oil sump 81 facing the other end face of the rotor 5 is formed in the front side block 65 adjacent to the front side.

The rear side block 67 is provided with a variable capacity device at a position in contact with the cylinder 4. This variable displacement device can adjust the discharge capacity of the refrigerant gas according to the temperature inside the vehicle. The capacity variable device has a disk-shaped capacity control plate 51 shown by a dashed line in FIG. 2, a solenoid valve (not shown) for controlling the capacity control plate 51, and a hydraulically driven piston (not shown).

The capacity control plate 51 is disposed at the left end of the cylinder 4 as shown in FIG. O solenoid valve
N, by turning OFF, oil is injected into the piston, and the displacement control plate 51 is rotated by the oil pressure at this time. The oil injection amount can be changed by the frequency at which the solenoid valve is turned on and off. ON / OFF of the solenoid valve is controlled by a controller (not shown) based on the temperature inside the vehicle.

FIG. 3 is a sectional view taken along the line BB in FIG. The capacity control plate 51 has two notches 51a. The notch 51 a allows communication between the inside of the cylinder 4 and a suction chamber 75 communicating with the suction port 61.
On the other hand, a compression chamber 14 is formed in a portion of the capacity control plate 51 without a notch, an inner wall of the cylinder 4 and a space closed by the vane 13.

The operation of the gas compressor 10 according to the first embodiment of the present invention will be described below. When a driving force is received from a pulley 31 serving as a rotation transmission unit via an electromagnetic clutch, the rotation shaft 6 rotates to draw and compress the refrigerant gas in the compression chamber 14.

The high-pressure refrigerant gas compressed in the compression chamber 14 is
Discharge gas passage 69 through discharge port 16 and discharge valve 18
Through the discharge chamber 19. And the discharge chamber 19
The refrigerant gas and oil are separated by an oil separator 71 provided therein. The oil accumulates in the bottom of the discharge chamber 19, and the refrigerant gas is sent from the discharge chamber 19 to the outside condenser (not shown) through the discharge port 73.

As described above, the gas to be compressed is sucked through the suction port 61, compressed and then discharged from the discharge port 73. The suction port 61 is on the front side block 65 side, and the discharge chamber 19 is on the rear side. It is arranged on the block 67 side.

Therefore, the front head 63 becomes the suction side and receives the low-temperature gas to be compressed from the suction port 61 thereof. As a result, the temperature rise of the lip seal 63a in the front head 63 is suppressed, and the heat-resistant condition is eased. By relaxing the heat-resistant condition, the durability of the lip seal 63a is improved, or the applicable specification range is expanded.

Next, the variable capacity function will be described.
For example, if the capacity control plate 51 is rotated to the left from the position in FIG. 2, the notch 51a is rotated to the left, so that the position where the compression chamber 14 is formed also moves to the left. 14 also becomes smaller. in this way,
The discharge capacity can be adjusted by rotating the capacity control plate 51.

The gas compressor 10 is set to have the maximum capacity (maximum confined volume) when the rotation angle of the capacity control plate 51 is 0 °, and to have the minimum capacity at the maximum rotation angle. I have.

In the gas compressor 10, since the displacement control plate 51 is disposed on the rear side, the compression chamber 14 and the suction chamber 75 are disposed between the displacement control plate 51 and the suction port 75. , Two large spaces and a communication path between them are secured.

Due to the silencer effect of the two large spaces having the cross-sectional change and the damping effect of the long path leading to the suction port 61, the influence of the pulsation on the suction port 61 based on the capacity control plate is suppressed. Therefore, the gas compressor 10 of the present invention can reduce noise and vibration caused by resonance of the evaporator connected to the suction port 61.

The oil accumulated in the bottom of the discharge chamber 19 is sent to the front bearing 79 through the oil passage 77 according to the pressure difference when the rotor 5 rotates. The oil that has reached the oil sump 81 via the front side bearing 79 has been decompressed, and has a pressure approximately intermediate between the discharge pressure in the discharge chamber 19 and the suction pressure of the suction chamber 75 communicating with the suction port 61.

In addition, the rotating shaft 6 includes an amateur 33
The spring load when the electromagnetic force is attracted to the pulley 31 and the pressure exerted by the suction gas in the suction chamber 75 on the inclined portion 6 c disposed on the outer periphery of the rotating shaft 6 act on the rotating shaft 6 to the left. For this reason, the rotating shaft 6 is pressed to the left during operation. Therefore, the capacity control plate 51 is in a state of being pressed by the rotor 5.

That is, due to the pressing by the rotor 5, the capacity control plate 51 generates a co-rotating force accompanying the rotation of the rotor 5, and its behavior is hindered.

The direction of the co-rotating force acts on the side of the capacity control plate 51 which minimizes the capacity, and the magnitude of the force corresponds to the pressing force of the rotor 5 against the capacity control plate 51 and the friction of the oil interposed therebetween. It is determined by the product of the coefficients.

When the pressing force against the capacity control plate 51 is large, the force for controlling the capacity control plate 51 is affected by the co-rotating force of the rotor 5, and hysteresis occurs in the rotation angle in reciprocation of rotation.

When it is desired to increase the capacity from an arbitrary capacity position, and when the co-rotating force of the rotor 5 is larger than the force for moving the capacity control plate 51, the capacity control plate 5
It is also conceivable that 1 becomes out of control.

The oil passage 83 of the gas compressor 10 of the present invention
Supplies the oil accumulated in the discharge chamber 19 for lubrication of the rear bearing 85. At this time, the discharge pressure is guided to the oil passage 83, and the discharge pressure is attenuated to a pressure approximately intermediate between the discharge pressure and the suction pressure via the rear bearing 85.

This pressure is applied from the oil sump 87 to the end face of the rotor 5 in the axial direction and in a direction in which the pressing force acting between the rotor 5 and the displacement control plate 51 is weakened.
Similarly, the oil reservoir 89 at the shaft end acts to push the rotor 5 back to the right in the drawing.

As described above, in the gas compressor 10 of the present invention, the pressing force acting between the rotor 5 and the displacement control plate 51 is weakened by the oil passage 83 and the oil sumps 87 and 89, so that the displacement of the displacement can be reduced. The control performance of the displacement control plate can be improved, and the loss of shaft power can be reduced.

Next, a second embodiment of the present invention will be described. FIG. 4 is a sectional view of a gas compressor 20 according to a second embodiment of the present invention. In the following, the same components as those in FIG.

In FIG. 4, an oil passage 91 is provided instead of the oil passage 83 in FIG. This oil passage 91
Is designed to directly supply the oil accumulated in the discharge chamber 19 to the oil sump 89.

According to this configuration, the intermediate pressure is conventionally applied to the oil sump 89, but the oil pressurized by the high-pressure refrigerant gas in the discharge chamber 19 is directly applied to the left end face of the rotary shaft 6. That is, during operation, the rotating shaft 6 is pressed rightward by this high pressure. Therefore, the leftward pressing force applied to the capacity control plate 51 can be reduced by the amount of the differential pressure as compared with the related art.

By introducing the oil to the oil sump 89, the rotating shaft 6
The pressing force is applied to the end face, and this oil is also guided to the oil sump 87 on the end face of the rotor 5. Therefore, the rotating shaft bearings formed between the rotating shaft 6 and the rear side block 67 and between the rotor 5 and the rear side block 67 can be lubricated.

As described above, by changing the load applied to the rotating shaft 6 and reducing the co-rotating force, it is possible to eliminate the problem of the rotation behavior of the displacement control plate 51. In addition, the driving power of the rotating shaft 6 can be reduced by the amount of the leftward pressing force applied to the displacement control plate 51.

Next, a third embodiment of the present invention will be described. FIG. 5 is a sectional view of a gas compressor 30 according to a third embodiment of the present invention.

In FIG. 5, both the oil passage 83 in FIG. 1 and the oil passage 91 in FIG. 4 are provided. The oil passage 91 supplies the oil accumulated in the discharge chamber 19 directly to the oil sump 89, and the oil passage 83 supplies the oil to the rear bearing 85 and the oil sump 87. Therefore, the rear bearing 85 can be sufficiently lubricated and a large push-back force can be generated in the oil sump 89 and the oil sump 87.

Further, a fourth embodiment of the present invention will be described. FIG. 6 is a cross-sectional view of a gas compressor 40 according to a fourth embodiment of the present invention, and FIG. 7 is a view of the gas compressor 40 as viewed in a direction indicated by an arrow C in FIG.

The gas compressor 40 includes a first fastening means 95 such as a bolt for integrally fixing the front head 63 and the rear side block 67 at the outer peripheral portion thereof, and an integral connection between the front side block 65 and the cylinder 4. A second fastening means 96 using a fixing bolt or the like. The main body of the gas compressor 40 is assembled by the first fastening means 95 and the second fastening means 96.

The front head 63 is connected to the fastening means 9 on the outer peripheral portion.
As a result, the fastening means 96 of the front side block 65 can be disposed inside the front head 63 without penetrating inside and outside the front head 63.

In the conventional fixing structure, since the front side block 65 is fixed together in the area of the space in the front head 63 by the fastening means of the front side block 65,
There was a case where gas leaked from the through hole.

However, the gas compressor 40 of the present invention can secure the airtightness of the front head 63,
It is possible to prevent gas leakage from the front head 63 with a simple configuration without requiring an increase in the number of parts and the body diameter. Further, as the volume of the suction chamber 75 is increased, transmission of sound and vibration can be suppressed accordingly.

[0075]

As described above, according to the present invention, the suction port through which the refrigerant gas is sucked is formed in the front head, so that the durability of the lip seal in the front head is improved.

Further, since the gas compressor of the present invention is provided with the capacity control plate on the discharge chamber side with respect to the cylinder, abnormal noise and vibration on the suction port side can be suppressed.

Further, in the gas compressor according to the present invention, the simple structure for guiding the oil pressure to the rotating shaft eliminates the problem of the displacement control plate, thereby ensuring control stability and improving displacement accuracy.

[Brief description of the drawings]

FIG. 1 is a sectional view of a gas compressor according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a sectional view taken along line BB in FIG. 1;

FIG. 4 is a sectional view of a gas compressor according to a second embodiment of the present invention.

FIG. 5 is a sectional view of a gas compressor according to a third embodiment of the present invention.

FIG. 6 is a sectional view of a gas compressor according to a fourth embodiment of the present invention.

FIG. 7 is a view taken in the direction of arrow C in FIG. 6;

[Explanation of symbols]

 4 Cylinder 5 Rotor 6 Rotary shaft 6a One end 6b Other end 6c Inclined part 10, 20, 30, 40 Gas compressor 13 Vane 14 Compression chamber 16 Discharge port 19 Discharge chamber 31 Pulley (rotation transmitting means) 51 Capacity control plate 61 Suction port 63 Front Head 63a Lip Seal 65 Front Side Block 67 Rear Side Block 73 Discharge Port 75 Suction Chamber 77, 83, 91 Oil Passage 79 Front Bearing 81, 87, 89 Oil Pool 85 Rear Bearing

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 3H029 AA05 AA17 AB03 BB01 BB21 BB44 BB52 CC03 CC04 CC16 CC20 CC24 CC25 CC52 CC58 CC85 3H040 AA09 BB05 BB11 CC02 CC06 CC10 CC14 CC22 DD03 DD06 DD09 DD18 DD22 DD23 DD25 DD27 DD28 DD39

Claims (8)

[Claims] 1. A cylinder sandwiched between a front side block and a rear side block, a rotary shaft penetrating the cylinder and the front side block, and having one end reaching the inside of the rear side block, and fixed to the rotary shaft. A rotor, a plurality of vanes that can be moved up and down in the radial direction of the rotor, a capacity control plate slidably disposed on the vane, the rotor and the cylinder, and rotatable; The compression chamber is formed in a compression chamber that sucks, compresses, and discharges the refrigerant gas by rotating the vanes that partition the inside of the cylinder according to the rotation angle position of the plate, and is formed inside a case disposed in the rear side block. A discharge chamber in which oil is separated from the refrigerant gas discharged from the chamber, a discharge port for discharging the refrigerant gas from the discharge chamber at a discharge pressure, and a reservoir in the discharge chamber. An oil passage for supplying accumulated oil for operating the vane and / or lubricating the rotating shaft, a rotation transmitting means provided at the other end of the rotating shaft, A front head that has a lip seal in contact therewith, and covers the front side block; and a suction port formed in the front head for sucking a refrigerant gas. By rotating the capacity control plate, A gas compressor wherein the capacity of a compression chamber is variable. 2. The gas compressor according to claim 1, wherein the displacement control plate is disposed on a discharge chamber side of the cylinder. 3. A first fastening means for integrally fixing the front head and the rear side block at an outer peripheral portion thereof, and a first fastening means on an inner circumferential side of the first fastening means and the front side block and the cylinder. The gas compressor according to claim 1 or 2, further comprising a second fastening means for integrally fixing the gap therebetween. 4. An oil sump is formed in the rear side block facing the end face of the rotor, and the oil sump is supplied from the oil passage through a rear bearing that receives the rotation shaft on the rear side block side. The gas compressor according to any one of claims 1 to 3, wherein the gas compressor receives the pressure. 5. The discharge pressure is guided to a space in contact with the end face of the rotating shaft inside the rear side block, and the discharge pressure is such that a pressing force acting in an axial direction and acting between the rotor and the displacement control plate is reduced. The gas compressor according to any one of claims 2 to 4, wherein the gas compressor is applied in a direction to be weakened. 6. An oil accumulated in the discharge chamber is supplied to the space, and an axial pressing force is applied to an end face of the rotating shaft by a discharge pressure transmitted to the oil. The gas compressor according to claim 5. 7. A rotary shaft having a rotation transmitting means provided at the shaft end and a plurality of radially extending and retractable vanes radially provided through a rotor, and an insertion shaft supporting the rotation transmitting means side of the rotary shaft. A front side block, a rear side block that supports a shaft end of the rotation shaft opposite to the rotation transmitting means, and both ends closed by the front side block and the rear side block, and the vane is slidably mounted. And a suction port formed to communicate with the suction position of the cylinder via one of the front side block or the rear side block, and the other of the front side block or the rear side block. A discharge chamber formed to communicate with the discharge position of the cylinder, and the compression of the discharge chamber on the discharge chamber side of the cylinder. A gas compressor comprising: a capacity control plate which faces a chamber and controls a compression timing by a rotation operation. 8. A rotating shaft provided with a rotation transmitting means at a shaft end, a front side block for inserting and supporting the rotation transmitting means side of the rotating shaft, and a shaft end of the rotating shaft opposite to the rotation transmitting means. A cylinder forming a compression chamber, a suction port formed to communicate with a suction position of the cylinder, a discharge chamber formed to communicate with a discharge position of the cylinder, and the front side block. And a fastening means for integrally fixing an outer peripheral portion between the front head and the rear side block.