WO2007034621A1

WO2007034621A1 - Reciprocating compressor

Info

Publication number: WO2007034621A1
Application number: PCT/JP2006/314546
Authority: WO
Inventors: Kazuhiko Takai
Original assignee: Sanden Corporation
Priority date: 2005-09-21
Filing date: 2006-07-24
Publication date: 2007-03-29
Also published as: US20090238698A1; EP1947336A1; JP4663462B2; EP1947336A4; JP2007085209A; CN101268277A

Abstract

[PROBLEMS] To provide a reciprocating compressor increased in the volume of a discharge chamber by forming spaces communicating with the discharge chamber in a cylinder block to solve problems in a prior art. [MEANS FOR SOLVING THE PROBLEMS] This reciprocating compressor comprises a rotating shaft, a motion converting mechanism converting rotary motion into reciprocating motion, pistons reciprocatingly driven by the rotating shaft through the motion converting mechanism, the cylinder block in which cylinder bores for inserting the pistons therein and a center bore for inserting one end of the rotating shaft therein are formed, a valve plate in which a suction hole and a discharge hole are formed, having a suction valve opening and closing the suction hole and a discharge valve opening and closing the discharge hole, and opposed to one end of the cylinder block, and a rear housing having a suction chamber communicating with the cylinder bores through the suction hole and the suction valve and the discharge chamber communicating with the cylinder bores through the discharge valve and the discharge hole and opposed to the valve plate. The plurality of cylinder bores are formed in the cylinder block at intervals in the circumferential direction. An auxiliary discharge chamber communicating with the discharge chamber through an opening formed in the valve plate is formed in the cylinder block at a portion nearer the valve plate more than the center bore. The auxiliary discharge chamber comprises a center auxiliary discharge chamber adjacent to the center bore and a plurality of satellite auxiliary discharge chambers disposed on the radial outside of the center auxiliary discharge chamber at intervals in the circumferential direction while being held by the cylinder bores. Each of the auxiliary discharge chambers communicates with the discharge chamber through the opening formed in the valve plate.

Description

Specification

Reciprocating compressor

Technical field

[0001] The present invention relates to a reciprocating compressor.

Background art

[0002] A rotary shaft, a motion conversion mechanism that converts rotational motion into reciprocating motion, a piston that is reciprocally driven by the rotary shaft via the motion conversion mechanism, a cylinder bore into which the piston is inserted, and one end of the rotary shaft One end of the cylinder block having a cylinder block formed with a center bore into which a cylinder is inserted, a suction hole that opens and closes the suction hole, and a discharge valve that opens and closes the discharge hole. A valve plate that faces the cylinder bore, a suction chamber that communicates with the cylinder bore through the suction hole and the suction valve, and a discharge chamber that communicates with the cylinder bore through the discharge valve and the discharge hole. A plurality of cylinder bores spaced apart from each other in the circumferential direction, and the sub-discharge chamber communicating with the discharge chamber through an opening formed in the valve plate is more valve plate than the center bore of the cylinder block. Close part Formed reciprocating compressor is disclosed in Patent Document 1.

According to the compressor of Patent Document 1, the volume of the discharge chamber is increased, the discharge pressure pulsation generated when the gas in the cylinder bore is discharged to the discharge chamber is reduced, and the compressor noise is reduced. Patent Document 1: JP-A-7-77157

Disclosure of the invention

Problems to be solved by the invention

[0003] In the compressor of Patent Document 1, the sub-discharge chamber is composed of a circular central area coaxial with the center bore and a radial arm area extending from the circular central area to the gap between the cylinder bores. There is a problem that the structure of the discharge chamber is complicated and difficult to process.

In the compressor of Patent Document 1, the center bore reaches only the center part in the longitudinal direction of the cylinder block. However, the center bore reaches the end face near the valve plate of the cylinder block, and the rotation shaft is pivoted. A reciprocating compressor in which an adjusting screw for positioning in the direction is screwed into a center bore has also been used. In a reciprocating compressor having such a structure, the Applying the technical idea of forming the sub-discharge chamber in the inner block, the part closer to the valve plate than the adjustment screw of the center bore is communicated with the discharge chamber through the opening formed in the valve plate, and the volume of the discharge chamber is Will be increased. However, if the part closer to the valve plate than the adjustment screw of the center bore is communicated with the discharge chamber through the opening formed in the valve plate, the part on the side separated from the valve force by the adjustment screw of the center bore is adjusted. The crank chamber that accommodates the rotating shaft and the motion conversion mechanism communicates with the discharge chamber via the center bore because the screw portion of the center bore communicates with a portion closer to the valve plate than the adjustment screw of the center bore. As a result, the function of the compressor is impaired.

The present invention has been made in view of the above problems, and is a reciprocating compressor in which a space communicating with a discharge chamber is formed in a cylinder block to increase the volume of the discharge chamber. An object of the present invention is to provide a reciprocating compressor in which the problem is solved.

Means for solving the problem

In order to solve the above problems, in the present invention, a rotating shaft, a motion conversion mechanism that converts rotational motion into reciprocating motion, a piston that is reciprocated by the rotating shaft via the motion converting mechanism, and a piston are inserted. A cylinder block formed with a cylinder bore and a center bore into which one end of the rotating shaft is inserted, a suction valve for opening and closing the suction hole, and a discharge valve for opening and closing the discharge hole. A valve plate facing one end of the cylinder block, a suction chamber communicating with the cylinder bore via the suction hole and the suction valve, and a discharge chamber communicating with the cylinder bore via the discharge valve and the discharge hole. A plurality of cylinder bores spaced apart from each other in the circumferential direction and communicating with the discharge chamber through an opening formed in the valve plate. The sub-discharge chamber is formed at a position closer to the valve plate than the center bore of the cylinder, and the sub-discharge chamber is separated from the center sub-discharge chamber adjacent to the center bore, and the cylinder bore is spaced radially from the center sub-discharge chamber in the circumferential direction. A plurality of satellite sub-discharge chambers sandwiched between the sub-discharge chambers, each sub-discharge chamber communicating with the discharge chamber through an opening formed in the valve plate. Provide a machine.

In the reciprocating compressor according to the present invention, the sub-discharge chamber is configured by a circular central region coaxial with the center bore and a radial arm region extending from the circular central region force to the gap between the cylinder bores. Instead of a central sub-discharge chamber adjacent to the center bore, and a plurality of satellite sub-discharge chambers disposed radially between the central sub-discharge chamber and circumferentially spaced from each other and sandwiched between cylinder bores. Since the central sub-discharge chamber and the satellite sub-discharge chamber are made independent of each other, the configuration of the sub-discharge chamber is simplified compared to the case where the radiating arm area is continuously formed from the circular central area, It becomes easy to process.

[0005] In the present invention, a rotating shaft, a motion conversion mechanism that converts rotational motion into a reciprocating motion, a piston that is driven to reciprocate by the rotating shaft via the motion mechanism, a cylinder bore into which the piston is inserted, and a rotation A cylinder block having a center bore into which one end of the shaft is inserted, a suction hole and a discharge hole, a suction valve for opening and closing the suction hole, and a discharge valve for opening and closing the discharge hole A valve plate having a valve plate facing one end of the cylinder block, a suction chamber communicating with the cylinder bore via the suction hole and the suction valve, and a discharge chamber communicating with the cylinder bore via the discharge valve and the discharge hole And an adjustment screw that axially positions the rotating shaft is screwed into the center bore, and a portion closer to the valve plate than the adjustment screw of the center bore is formed on the valve plate. Communicating with the discharge chamber through the opening A reciprocating compressor is provided in which a sealing member for sealing a contact portion between the adjusting screw and the center bore is provided.

In the reciprocating compressor according to the present invention, a portion closer to the valve plate than the adjustment screw of the center bore communicates with the discharge chamber through an opening formed in the valve plate, and the adjustment screw and the center bore are connected to each other. Since the seal member for sealing the abutting portion is disposed, the valve plate force is separated from the adjustment screw of the center bore through the screw portion of the adjustment screw. Increases the volume of the discharge chamber while preventing the crank chamber that houses the rotating shaft and the operating structure from communicating with the discharge chamber via the center bore while preventing communication with the nearby portion. Thus, the discharge pressure pulsation generated when the gas in the cylinder bore is discharged into the discharge chamber can be reduced, and the compressor noise can be reduced.

[0006] In a preferred aspect of the present invention, a plurality of satellite bores are formed in the cylinder block, and are arranged in the cylinder block so as to be spaced apart from each other in the circumferential direction on the outer side in the radial direction of the center bore. It communicates with the discharge chamber through an opening formed in the valve plate. By further increasing the volume of the discharge chamber, the discharge pressure pulsation generated when the gas in the cylinder bore is discharged to the discharge chamber can be further reduced, and the compressor noise can be further reduced.

[0007] In a preferred aspect of the present invention, in addition to the partition wall that partitions the suction chamber and the discharge chamber, leg portions that sandwich the valve plate in cooperation with the cylinder block are formed in the discharge chamber.

When the sub-discharge chamber or the part closer to the valve plate than the adjustment screw of the center bore communicates with the discharge chamber through the opening formed in the valve plate, the balance of force due to the gas pressure applied to the valve plate changes, and the valve The force that pushes the plate toward the rear housing becomes greater than the opposing force, and the central part of the valve plate may be deformed toward the discharge chamber. In addition to the partition wall that partitions the suction chamber and the discharge chamber, deformation of the valve plate can be suppressed by forming a leg portion that sandwiches the valve plate in cooperation with the cylinder block in the discharge chamber.

The invention's effect

[0008] According to the present invention, there is provided a reciprocating compressor in which a space communicating with a discharge chamber is formed in a cylinder block to increase the volume of the discharge chamber, and the reciprocating motion in which the problem of Patent Document 1 is solved Provided with a compressor.

BEST MODE FOR CARRYING OUT THE INVENTION

[0009] A reciprocating compressor according to an embodiment of the present invention will be described.

Example 1

As shown in FIG. 1, a variable capacity swash plate compressor A includes a rotating shaft 10, a rotor 11 fixed to the rotating shaft 10, and a swash plate 12 supported on the rotating shaft 10 with a variable tilt angle. And. The swash plate 12 is connected to the rotor 11 via a link mechanism 13 that allows the inclination angle of the swash plate 12 to vary, and rotates in synchronization with the rotor 11 and, consequently, the rotary shaft 10.

The piston 15 is moored to the swash plate 12 through a pair of shears 14 slidably contacting the peripheral edge of the swash plate 12.

The rotor 11, the link mechanism 13, the swash plate 12, and the shoe 14 form a motion conversion mechanism that converts the rotation of the rotating shaft 10 into the reciprocating motion of the piston 15.

The piston 15 is inserted into a cylinder bore 16 a formed in the cylinder block 16. A plurality of cylinder bores 16a are formed at intervals in the circumferential direction.

Crank chamber 17 that houses the rotating shaft 10, the rotor 11, the link mechanism 13, the swash plate 12, and the shoe 14 A bottomed cylindrical front housing 18 is disposed.

One end of the rotating shaft 10 extends through the front housing 18 to the outside. A shaft sealing member 19 for sealing the front housing penetrating portion of the rotary shaft 10 is disposed.

[0011] The rotary shaft 10 is rotatable by a radial bearing 20 that is press-fitted and fixed to the rotary shaft penetrating portion of the front housing, and a radial bearing 21 that is press-fitted and fixed to the center bore 16b formed in the cylinder block 16. It is supported by. The center bore 16b reaches the center of the cylinder block 16 in the longitudinal direction.

Rotational power is transmitted from an external drive source (not shown) to the distal end portion of the rotary shaft 10 through an electromagnetic clutch 26 attached to the front housing 18.

[0013] A valve plate that is formed with a suction hole 27a and a discharge hole 27b, has a suction valve that opens and closes the suction hole 27a, and a discharge valve that opens and closes the discharge hole 27b, and faces one end of the cylinder block 16 27 is arranged.

It has a suction chamber 28a that communicates with the cylinder bore 16a via the suction hole 27a and the suction valve, and a discharge chamber 28b that communicates with the cylinder bore 16a via the discharge valve and the discharge hole 27b. A rear housing 28 is provided! The suction chamber 28a is connected to the evaporator of the vehicle air conditioner (not shown) via the suction port 29, and the discharge chamber 28b is connected to the condenser of the vehicle air conditioner (not shown) via the discharge port 30.

A cylindrical central sub-discharge chamber 16c is formed adjacent to the center bore 16b at a portion closer to the valve plate 27 than the center bore 16b of the cylinder block 16. The central auxiliary discharge chamber 16c reaches one end of the cylinder block 16, and communicates with the discharge chamber 28b through an opening 27c formed in the valve plate 27. As shown in FIGS. 1 and 2, a plurality of small-diameter cylindrical satellite sub-discharge chambers 16d are cylinder blocks that are spaced radially from each other in the circumferential direction outside the central sub-discharge chamber 16c and sandwiched between cylinder bores 16a. 16 is formed. The satellite secondary discharge chamber 16d reaches one end of the cylinder block 16, and communicates with the discharge chamber 28b through an opening 27d formed in the valve plate 27.

In addition to the partition wall 28c that partitions the suction chamber 28a and the discharge chamber 28b, a leg portion 28d that holds the valve plate 27 in cooperation with the cylinder block 16 is formed in the discharge chamber 28b.

[0015] Front housing 18, cylinder block 16, valve plate 27, rear housing 28 are bolts 31 Are assembled together.

The variable displacement swash plate compressor A includes an air supply passage (not shown) that allows the discharge chamber 28b and the crank chamber 17 to communicate with each other, and a capacity control valve (not shown) that opens and closes the air supply passage. An exhaust passage (not shown) that allows the chamber 17 and the suction chamber 28a to communicate with each other, and a throttle (not shown) disposed in the exhaust passage.

In the variable capacity swash plate compressor A, the rotational power of an external drive source (not shown) is transmitted to the rotary shaft 10 via the electromagnetic clutch 26, and the rotation of the rotary shaft 10 is transmitted to the rotor 11 and the link mechanism 13. Is transmitted to the swash plate 12. The reciprocating power in the extending direction of the rotating shaft 10 at the peripheral edge of the swash plate 12 accompanying the rotation of the swash plate 12 is transmitted to the piston 15 via the shoe 14, and the piston 15 reciprocates in the bore 16a. Refrigerant gas recirculated from the evaporator of the vehicle air conditioner is sucked into the bore 16a through the suction port 29, the suction chamber 28a, the suction hole 27a, and the suction valve, compressed in the bore 16a, and discharged to the discharge hole 27b. It flows out to the condenser of the vehicle air conditioner via the discharge valve, the discharge chamber 28b, and the discharge port 30.

By operating a capacity control valve (not shown), the air supply passage between the discharge chamber 28b and the crank chamber 17 is opened and closed, and the introduction of the discharge pressure into the crank chamber 17 is turned on and the crank chamber pressure is controlled. The inclination angle of the swash plate 12 is variably controlled, and the discharge capacity of the compressor is variably controlled.

[0017] When the refrigerant gas compressed in the cylinder bore 16a is discharged into the discharge chamber 28b, discharge pressure pulsation occurs. The discharge pressure pulsation propagates out of the compressor via the discharge port 30 and resonates with nearby members to cause compressor noise. However, in the variable capacity swash plate compressor A, the central sub-discharge chamber 16c formed in the cylinder block 16 and the plurality of satellite sub-discharge chambers 16d are provided with the opening 27c formed in the valve plate 27 and the opening. Since the volume of the discharge chamber 28b is increased by communicating with the discharge chamber 28b through 27d, the function of the discharge chamber 28b as an expansion silencer is improved, and the discharge pressure pulsation is moved out of the compressor. Propagation is suppressed. As a result, compressor noise is reduced.

In the variable capacity swash plate compressor A, the sub-discharge chamber 16d is replaced with a circular central area coaxial with the center bore and a radial arm area extending from the circular central area force to the gap between the cylinder bores. Thus, the central sub-discharge chamber 16c adjacent to the center bore 16b and the central sub-discharge chamber 16c are arranged radially and outwardly in the circumferential direction so as to be sandwiched between the cylinder bores 16a. Since the central sub-discharge chamber 16c and the satellite sub-discharge chamber 16d are independent of each other, the radiation arm region is formed continuously from the circular central region. Compared to the above, the configuration of the sub-discharge chamber is simplified and it is easy to process.

[0018] Sub-discharge chamber 16c, 16d force When communicating with discharge chamber 28b through openings 27c, 27d formed in valve plate 27, the balance of force due to gas pressure applied to valve plate 27 changes, and valve plate 27 The pushing force to the rear housing 28 side becomes larger than the opposing force, and the central portion of the valve plate 27 may be deformed to the discharge chamber side 28b. In addition to the partition wall 28c that partitions the suction chamber 28a and the discharge chamber 28b, the leg portion 28d that sandwiches the valve plate 27 in cooperation with the cylinder block 16 is formed in the discharge chamber 28b. Deformation can be suppressed.

Example 2

The same configuration as the configuration of the first embodiment is denoted by the same reference numerals as in the first embodiment, and the second embodiment will be described.

As shown in FIG. 3, the variable capacity swash plate compressor A ′ includes a rotating shaft 10, a rotor 11 fixed to the rotating shaft 10, and a swash plate 12 supported on the rotating shaft 10 so that the tilt angle is variable. ing. The swash plate 12 is connected to the rotor 11 via a link mechanism 13 that allows the tilt angle of the swash plate 12 to vary, and rotates in synchronization with the rotor 11 and thus the rotating shaft 10.

The piston 15 is inserted into a cylinder bore 16 a formed in the cylinder block 16. The cylinder bore 16 a passes through the cylinder block 16.

A bottomed cylindrical front housing 18 that forms a crank chamber 17 that houses the rotating shaft 10, the rotor 11, the link mechanism 13, the swash plate 12, and the shoe 14 is disposed.

[0020] The rotary shaft 10 includes a radial bearing 20 press-fitted and fixed to the rotary shaft penetrating portion of the front housing, and a radial press-fixed to the center bore 16b formed in the cylinder block 16. The bearing 21 is supported rotatably. The center bore 16b passes through the cylinder block 16.

The rotating shaft 10 is sandwiched between a thrust bearing 22 disposed between the rotor 11 and the front housing 18 and a support member 23 disposed adjacent to the other end of the rotating shaft 10. The axial clearance between the other end of the rotary shaft 10 and the support member 23 is controlled to a predetermined value by the adjusting screw 24 screwed to the center bore 16b, whereby the rotary shaft 10 is positioned in the axial direction. Yes.

The contact portion of the adjusting screw 24 with the center bore 16b is sealed by an O-ring 25.

Rotational power is transmitted from an external drive source (not shown) to the tip of the rotary shaft 10 via an electromagnetic clutch 26 attached to the front housing 18.

[0022] A valve plate that is formed with a suction hole 27a and a discharge hole 27b, has a suction valve that opens and closes the suction hole 27a, and a discharge valve that opens and closes the discharge hole 27b, and faces one end of the cylinder block 16 27 is arranged.

A portion of the center bore 16b formed in the cylinder block 16 closer to the valve plate 27 than the adjusting screw 24 communicates with the discharge chamber 28b through an opening 27c formed in the valve plate 27. In addition to the partition wall 28c that partitions the suction chamber 28a and the discharge chamber 28b, a leg portion 28d that holds the valve plate 27 in cooperation with the cylinder block 16 is formed in the discharge chamber 28b.

[0023] The front housing 18, the cylinder block 16, the valve plate 27, and the rear housing 28 are integrally assembled by bolts 31.

The variable displacement swash plate compressor A includes an air supply passage (not shown) that allows the discharge chamber 28b and the crank chamber 17 to communicate with each other, and a capacity control valve (not shown) that opens and closes the air supply passage. An exhaust passage (not shown) that connects the chamber 17 and the suction chamber 28a and an exhaust passage are provided. It is equipped with an aperture, not shown.

[0024] In the variable capacity swash plate compressor A, the rotational power of an external drive source (not shown) is transmitted to the rotary shaft 10 via the electromagnetic clutch 26, and the rotation of the rotary shaft 10 is transmitted to the rotor 11 and the link mechanism 13. Is transmitted to the swash plate 12. The reciprocating power in the extending direction of the rotating shaft 10 at the periphery of the swash plate 12 accompanying the rotation of the swash plate 12 is transmitted to the piston 15 via the shear 14, and the piston 15 reciprocates in the bore 16a. The refrigerant gas recirculated from the evaporator of the vehicle air conditioner is sucked into the bore 16a through the suction port 29, the suction chamber 28a, the suction hole 27a, and the suction valve, is compressed in the bore 16a, and is discharged to the discharge hole 27b. It flows out to the condenser of the vehicle air conditioner via the discharge valve, the discharge chamber 28b, and the discharge port 30.

[0025] When the refrigerant gas compressed in the cylinder bore 16a is discharged into the discharge chamber 28b, discharge pressure pulsation occurs. The discharge pressure pulsation propagates out of the compressor via the discharge port 30 and resonates with nearby members to cause compressor noise. However, in the variable capacity swash plate compressor A, the force of the center bore 16b formed in the cylinder block 16 is closer to the valve plate 2 7 than the adjusting screw 24 through the opening 27c formed in the valve plate 27. Since the volume of the discharge chamber 28b is increased by communicating with the discharge chamber 28b, the function of the discharge chamber 28b as an expansion silencer is improved, and the propagation of discharge pressure pulsation outside the compressor is improved. It is suppressed. As a result, compressor noise is reduced.

In the variable capacity swash plate compressor A, the O-ring 25 that seals the contact portion between the head of the adjusting screw 24 and the center bore 16b is provided, so the adjusting screw of the center bore 16b is arranged. The part on the side farther from the valve plate 27 than 24 does not communicate with the part closer to the valve plate 27 than the adjustment screw 24 of the center bore 16b via the screw part of the adjustment screw 24. It does not communicate with the discharge chamber 28b through the bore 16b. As a result, the discharge capacity control by opening and closing the supply passage is performed without any trouble.

[0026] The force of the part located closer to the valve plate 27 than the adjusting screw 24 of the center bore 16b When the valve 27 communicates with the discharge chamber 28b through the opening 27c formed in the valve plate 27, the force balance due to the gas pressure applied to the valve plate 27 Changes, the force that pushes the valve plate 27 toward the rear housing 28 becomes larger than the opposing force, and the central portion of the valve plate 27 may be deformed to the discharge chamber side 28b. In addition to the partition wall 28c that partitions the suction chamber 28a and the discharge chamber 28b, a leg portion 28d that clamps the valve plate 27 in cooperation with the cylinder block 16 is formed in the discharge chamber 28b, thereby deforming the valve plate 27. Can be suppressed

[0027] In addition to communicating the portion closer to the valve plate 27 than the adjusting screw 24 of the center bore 16b to the discharge chamber 28b through the opening 27c formed in the valve plate 27, the radial direction of the center bore 16b A plurality of satellite bores similar to the satellite sub-discharge chamber 16d of the first embodiment are disposed in the cylinder block 16 and are spaced apart from each other in the circumferential direction and disposed between the cylinder bores 16a. May be formed in the valve plate 27 so that the satellite bore communicates with the discharge chamber 28b.

It is possible to further increase the volume of the discharge chamber 28b, further reduce the discharge pressure pulsation generated when the refrigerant gas in the cylinder bore 16a is discharged to the discharge chamber 28b, and further reduce the compressor noise.

Industrial applicability

[0028] The present invention can be used for reciprocating compressors such as a swash plate compressor and a swing plate compressor.

Brief Description of Drawings

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

FIG. 2 is a view taken along II II in FIG.

FIG. 3 is a cross-sectional view of a reciprocating compressor according to a second embodiment of the present invention.

Claims

The scope of the claims

[1] A rotating shaft, a motion converting mechanism that converts rotational motion into a reciprocating motion, a piston that is reciprocated by the rotating shaft via the motion converting mechanism, a cylinder bore into which the piston is inserted, and one end of the rotating shaft One end of the cylinder block having a cylinder block formed with a center bore into which a cylinder is inserted, a suction hole that opens and closes the suction hole, and a discharge valve that opens and closes the discharge hole. A valve plate that faces the cylinder bore, a suction chamber that communicates with the cylinder bore through the suction hole and the suction valve, and a discharge chamber that communicates with the cylinder bore through the discharge valve and the discharge hole. A plurality of cylinder bores spaced apart from each other in the circumferential direction, and the sub-discharge chamber communicating with the discharge chamber through an opening formed in the valve plate is more valve plate than the center bore of the cylinder block. On the side The sub-discharge chamber is composed of a plurality of satellites arranged between the central sub-discharge chamber adjacent to the center bore and the cylinder sub-chamber and spaced apart from each other in the circumferential direction outside the central sub-discharge chamber in the circumferential direction. A reciprocating compressor characterized in that it comprises a sub-discharge chamber, and each sub-discharge chamber communicates with the discharge chamber through an opening formed in a valve plate.

[2] A rotating shaft, a motion converting mechanism that converts rotational motion into a reciprocating motion, a piston that is reciprocated by the rotating shaft via the motion converting mechanism, a cylinder bore into which the piston is inserted, and one end of the rotating shaft One end of the cylinder block having a cylinder block formed with a center bore into which a cylinder is inserted, a suction hole that opens and closes the suction hole, and a discharge valve that opens and closes the discharge hole. A valve plate that faces the cylinder bore, a suction chamber that communicates with the cylinder bore through the suction hole and the suction valve, and a discharge chamber that communicates with the cylinder bore through the discharge valve and the discharge hole. A rear housing and an adjusting screw for positioning the rotating shaft in the axial direction are screwed into the center bore, and a part force closer to the valve plate than the adjusting screw of the center bore is discharged through an opening formed in the valve plate. Communicating with the adjusting screw A reciprocating compressor characterized in that a seal member for sealing a contact portion between the center bore and the center bore is disposed.

[3] A plurality of satellite bores are formed in the cylinder block that are spaced radially apart from each other in the circumferential direction and are sandwiched by the cylinder bores, and the satellite bores are formed in the valve plate. The reciprocating compressor according to claim 2, wherein the reciprocating compressor is in communication with the discharge chamber through an opening. 4. The force according to claim 1, wherein, in addition to a partition wall that partitions the suction chamber and the discharge chamber, legs that sandwich the valve plate in cooperation with the cylinder block are formed in the discharge chamber. The reciprocating compressor described in 1.