JP2006057520A - Gas compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas compressor for effectively suppressing vibration of a cylinder in a specified radial direction and reducing the vibration of a housing covering the cylinder. <P>SOLUTION: The gas compressor 10 comprises the housing 11 having a suction port 33 and a discharge port 36 and a gas compression mechanism 12 housed in the housing. The compression mechanism 12 has the cylinder 13 for defining a cylinder chamber 14 and a rotor 17 rotatably housed in the cylinder chamber 14 for defining a compression chamber 14a whose capacity is increased/reduced to suck/compress gas with the rotation. The cylinder 13 is rigidly joined to the housing 11 on one end side of a rotating shaft 16 of the rotor 17 and elastically supported on the housing 11 via an elastic body 44 receiving vibrating force as shearing force on the rotating shaft 16 in the radial direction on the other end side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rotary gas compressor that compresses gas by driving a rotating body accommodated in a cylinder, and in particular, sucks gas by rotating a rotor provided with a plurality of vanes in an elliptic cylinder chamber. The present invention relates to a gas compressor suitable for a vane-rotor type gas compressor that compresses and discharges this compressed gas.

  In a conventional rotary gas compressor, it is known that a cylinder that accommodates a rotating body vibrates with a maximum amplitude in a specific radial direction when viewed in a cross section of the cylinder (see, for example, Patent Document 1).

  In order to suppress this vibration, the cylinder is rigidly supported at one end by a bolt in the housing covering the cylinder. An annular elastic member for sealing between the outer peripheral surface and the peripheral wall of the cylinder surrounding the outer peripheral surface is disposed on the outer peripheral surface of the other end of the cylinder.

In such a rotary gas compressor, when the other end of the cylinder vibrates in the radial direction of the rotating body due to the rotational vibration of the rotating body, the annular elastic member receives the vibration force as a compressive force. Therefore, in order to effectively suppress the vibration motion at the other end of the cylinder, it is conceivable to use an elastic body having high hardness for the annular elastic member that receives the vibration force generated by the vibration motion as a compression force.
JP 2003-254275 A (page 3, FIG. 9)

  However, when such a high-hardness elastic body is used for the annular elastic member, vibration acting as a force for compressing the high-hardness elastic body is not sufficiently absorbed by this elastic body. Therefore, the remaining vibration force that cannot be absorbed by the elastic body is directly transmitted to the housing through the elastic body, and as a result, the vibration of the housing increases.

  Accordingly, an object of the present invention is to provide a gas compressor that can effectively suppress vibration in a specific radial direction of a cylinder and thereby reduce vibration of a housing that covers the cylinder.

  A gas compressor according to the present invention includes a housing in which a suction port and a discharge port are formed, and the gas accommodated in the housing and sucked through the suction port is compressed, and the compressed gas is supplied to the discharge port. A gas compression mechanism that discharges through the cylinder, and the gas compression mechanism is rotatably accommodated in the cylinder chamber, and the volume is increased or decreased in order to suck and compress the gas with the rotation. A rotating body defining a compression chamber, and the cylinder is rigidly coupled to the housing on one end side of the rotating shaft of the rotating body, and acts on the other end side in the radial direction of the rotating shaft. The housing is elastically supported via an elastic body that receives a force as a shearing force.

  In the gas compressor according to the present invention, the elastic body disposed between the other end of the cylinder and the housing covering the cylinder receives the vibration force acting in the radial direction of the rotating shaft as a shearing force. The elastic body having a high rigidity can be used to effectively suppress the vibration at the other end of the cylinder, and the shearing force acting on the elastic body can be passed through the elastic body like a conventional compression force. Since it is not transmitted to the housing, the vibration transmitted to the housing can be greatly reduced as compared with the conventional case.

  The present invention can be applied to a vane-rotary gas compressor. In the vane-rotary type gas compressor, the rotating body disposed rotatably in the cylinder chamber is composed of a rotor provided with vanes that divide the cylinder chamber into a plurality of compression chambers in the circumferential direction, and the volume of the compression chamber is It increases or decreases with the rotation of the rotor.

  The cylinder chamber has an elliptical cross-sectional shape, and the cylinder chamber is disposed so as to face the radial direction of the cylinder chamber, and each of the cylinder chambers communicates with the discharge port in the radial direction of the cylinder chamber. A pair of suction holes arranged opposite to each other and communicating with the suction port can be provided.

  The cylinder is constituted by a cylinder member that is open at both ends that defines a space for the cylinder chamber, and a pair of end wall members that are fixed to the cylinder member so as to hermetically close both open ends of the cylinder member. One end wall member is rigidly supported on the housing by bolting, and the other end wall member is elastically attached to the end wall of the housing opposite to the end wall member via the elastic body. Can be supported.

  A high pressure chamber that communicates with the discharge port and discharges compressed gas from the compression mechanism is defined between the other end wall member and the end wall of the housing, and is discharged into the high pressure chamber. An oil separator for separating an oil component from the compressed gas is coupled, the oil separator is coupled to the other end wall member, and the elastic body is connected to the oil separator and the end wall of the housing. It can arrange | position in the state which received compression between both.

  According to the present invention, the elastic body that elastically supports the other end of the rotating body on the housing receives the vibration force acting in the radial direction of the rotating shaft of the rotating body as a shearing force. The vibration at the other end of the cylinder can be effectively suppressed using the body, and the shearing force acting on the elastic body is not transmitted to the housing through the elastic body unlike the conventional compression force. The vibration transmitted to the housing through the elastic body can be greatly reduced as compared with the conventional case, whereby the vibration of the housing covering the cylinder can be effectively reduced.

  The features of the present invention will become more apparent from the following description along with the illustrated embodiments.

  In the example shown in FIG. 1, the gas compressor 10 according to the present invention is used, for example, in a vehicle air conditioning system to compress the refrigerant, and although not shown, a conventionally well-known condenser, expansion valve, and evaporator. Etc. together with a circulation path for the refrigerant.

  The gas compressor 10 includes a housing 11 and a gas compression mechanism 12 accommodated in the housing. In the illustrated example, the gas compressor 10 is a vane-rotary gas compressor in which the gas compression mechanism 12 is a vane-rotary gas compression mechanism.

  In the illustrated example, the housing 11 includes a housing main body 11a formed of a cylindrical body with one end open, and a front housing member 11b that closes the open end of the housing main body. A cylinder 13 of the gas compression mechanism 12 is accommodated in the housing 11. In the illustrated example, the cylinder 13 is a cylindrical cylinder member 13a having both ends open to define a hollow portion having an elliptical cross section, and a pair of end wall members that close both open ends of the cylinder member. It has a side block 13b and a rear side block 13c. The front side block 13b is hermetically sealed to one end of the cylinder member 13a through a plurality of annularly arranged bolts 13d that penetrate the front side block in the plate thickness direction and are screwed into the end surface of the cylinder member 13a. Is bound to. The rear side block 13c is airtightly coupled to the other end of the cylinder member 13a through a similar bolt (not shown).

  Thus, a cylinder 13 is formed, and a cylinder chamber 14 having an elliptical cross section defined by a major axis direction X and a minor axis direction Y is formed in the cylinder, as shown in FIG. Therefore, as shown in FIG. 1, the front side block 13 b constitutes one end of the cylinder 13, and the rear side block 13 c constitutes the other end of the cylinder 13.

  As shown in FIG. 1, the cylinder chamber 14 is provided with a rotor 17 having a rotating shaft 16 rotatably supported by sliding bearings 15a and 15b formed on both side blocks 13b and 13c. As clearly shown in FIG. 2, the rotor 17 has a circular cross-sectional shape, and the rotor 17 is formed with vane grooves 18 including five slit grooves extending radially, and each vane groove 18 is formed. Contains a vane 20 that receives a biasing force toward the peripheral wall of the cylinder chamber 14 by centrifugal force acting when the rotor 17 rotates and hydraulic pressure guided to the back pressure chamber 19 formed at the bottom of the vane groove 18. ing. Each vane 20 divides the cylinder chamber 14 into a plurality of compression chambers 14 a in the circumferential direction, and the vane 20 slides with the wall surface of the cylinder chamber 14 while maintaining airtightness as the rotor 17 rotates. It is held in the groove 18.

  The rotor 17 having the vanes 20 constitutes the gas compression mechanism 12 together with the cylinder 13 that accommodates them. The cylinder member 13a of the cylinder 13 constituting the gas compression mechanism 12 is formed with a pair of discharge holes 21 opened in the cylinder chamber 14 at the peripheral wall thereof. The pair of discharge holes 21 are arranged symmetrically with respect to the rotation axis 16 in the vicinity of the minor axis along the minor axis direction Y of the cylinder chamber 14 as in the prior art. Each discharge hole 21 is provided with a well-known check valve 22 that allows discharge of compressed gas from the compression chamber 14a through the discharge hole 21 and a valve support 23 that prevents excessive deformation of the check valve. Yes. In addition, a pair of suction holes 24 are opened in the cylinder chamber 14, and each suction hole 24 is disposed in the vicinity of the short axis of the cylinder chamber 14 on the opposite side of each discharge hole 21 between the short axes.

  The cylinder 13 that rotatably accommodates the rotor 17 having the vane 20 is inserted into the housing main body 11a from its open end in a state in which a well-known annular seal member 25 is mounted on the outer periphery of the rear side block 13c that is the other end. Has been. The front housing member 11b is attached to the open end of the housing main body 11a so as to cover the front housing member 11b protruding from the open end of the housing main body 11a. As is well known in the art, the front housing member 11b is coupled to the front side block 13b and the housing body 11a via bolts (not shown). Therefore, the cylinder 13 is rigidly supported on the housing 11 by the front side block 13b which is one end thereof.

  As shown in FIG. 1, the front housing member 11b is formed with a cylindrical shaft portion 26 that receives the rotation shaft 16, and the shaft portion of the rotation shaft 16 that passes through the sliding bearing 15a of the front side block 13b. The tip is rotatably received. Between the shaft portion 26 and the rotating shaft 16, an annular seal mechanism 26 a for preventing the outflow of lubricating oil along the rotating shaft 16 is provided. The shaft portion 26 is rotatably provided with a pulley 28 via a rolling bearing 27 composed of an annular ball bearing arranged around the outer periphery thereof. In the illustrated example, an electromagnet device 29 is incorporated in the pulley 28.

  As is well known in the art, the electromagnet device 29 is a clutch that is supported by an armature 30 fixed to the tip of the shaft portion 26 via a leaf spring 31 that is an elastic body and that is spaced from the side of the pulley 28. Pulling the plate 32 over the spring force of the plate spring 31 and attracting it with an electromagnetic attracting force couples the pulley 28 and the armature 30, thereby enabling the integral rotation of both. The clutch plate 32 and the electromagnet device 29 constitute a so-called electromagnetic clutch mechanism.

  A pulley (not shown) is hung on the pulley 28, and the pulley 28 rotates by transmitting a rotational force from a driving source such as an engine mounted on the automobile through the belt. When the electromagnetic clutch mechanism is not energized to the electromagnet device 29, the clutch plate 32 is held at a distance from the side surface of the pulley 28 by the spring force of the leaf spring 31, so that the rotary shaft 16 rotates. Thus, therefore, the gas compressor 10 is put into a non-operating state.

  When electric power is supplied to the electromagnet device 29 by energization of the electromagnet device 29, the clutch plate 32 rotates integrally with the pulley 28 by the electromagnetic attraction force, so that the rotational force is applied to the rotating shaft 16 through the armature 30. Then, the rotor 17 rotates clockwise as viewed in FIG. Each vane 20 slides on the peripheral wall of the cylinder chamber 14 by the rotation of the rotor 17, and the strokes of suction, compression, and discharge in the compression chambers 14 a are well known in accordance with the sliding. Progresses.

  In the intake stroke, as shown in FIG. 1, a low-temperature and low-pressure refrigerant discharged from the evaporator (not shown) from a suction port 33 provided in the front housing member 11b through a check valve 34 provided in the suction port. Gas is sucked into the compression chamber 14a from the suction hole 24 (see FIG. 2). The refrigerant gas sucked into the compression chamber 14a is compressed in the compression stroke and becomes a high-temperature and high-pressure refrigerant gas. This high-temperature and high-pressure refrigerant gas is discharged from the compression chamber 14a through the discharge hole 21 (see FIG. 2) to the high-pressure chamber 35 provided in the housing 11 as shown in FIG. It is sent from the chamber to the condenser (not shown) through a discharge port 36 provided in the housing main body 11a.

  The high pressure chamber 35 is defined between the end wall 37 of the housing body 11a and the rear side block 13c that constitutes the other end of the cylinder 13. In the high pressure chamber 35, as shown in FIG. A well-known oil separator 38 is provided for separating the lubricating oil contained in the refrigerant from the refrigerant. The oil separator 38 is fixed to the rear side block 13c at a distance from the end wall 37 of the housing body 11a, that is, the end wall 37 of the housing 11.

  The lubricating oil 39 separated from the compressed refrigerant by the oil separator 38 is stored at the bottom of the high pressure chamber 35. The lubricating oil 39 in the high pressure chamber 35 is passed through oil passages 40, 41, and 42 provided in the rear side block 13c, the cylindrical cylinder member 13a, and the front side block 13b, respectively, by the pressure in the high pressure chamber 35. It is supplied to the sliding bearings 15a and 15b. Further, a part of the lubricating oil 39 supplied to the slide bearings 15a and 15b passes through the oil reservoir recesses 43 (saray) provided in the front side blocks 13b and the rear side blocks 13c, and passes through the vanes 20. It is led to the back pressure chamber 19 of the vane groove 18 to be received.

  As described above, each vane 20 appropriately slides on the peripheral wall of the cylinder chamber 14 as the rotor 17 rotates as described above due to the biasing force including the hydraulic pressure and centrifugal force in the back pressure chamber 19. Each process of suction, compression and discharge proceeds.

  Due to the rotation of the rotor 17, the rotation shaft 16 that rotates integrally with the rotor generates vibrations with various radial amplitudes on a plane perpendicular to the axis of the rotation shaft. Among these vibration directions, the amplitude along the minor axis direction Y of the cylinder chamber 14 indicated by the symbol Y in FIG.

  Therefore, as the rotor 17 that is a rotating body rotates, the cylinder 13 generally tries to vibrate in the minor axis direction. However, the front side block 13b that is one end of the cylinder 13 attaches the bolt to the front housing member 11b. The vibrations are suppressed because they are rigidly coupled to each other.

  On the other hand, the rear side block 13c, which is the other end of the cylinder 13, is elastically supported on the peripheral wall of the housing body 11a via an annular seal member 25 disposed on the outer periphery thereof, and the vibration force described above is compressed by the annular seal member 25. Acts as a force. Therefore, when high rigidity is used for the annular seal member 25, the annular seal member 25 becomes a vibration transmission path to the housing body 11a. For this reason, a low-rigid elastic body having an excellent sealing effect and vibration absorbing effect is used for the annular seal member 25 as in the prior art.

  For this reason, the annular seal member 25 cannot be expected to have a vibration suppressing effect at the other end of the cylinder 13. In order to suppress vibration at the other end of the cylinder 13, 13 between the end wall 37 of the cylinder 13 and the other end of the cylinder 13, that is, between the end wall 37 of the housing body 11a and the oil separator 38 fixed to the rear side block 13c in the illustrated example. For example, an elastic body 44 made of synthetic rubber is disposed.

  The elastic body 44 has a rectangular block shape, and is sandwiched so as to be compressed between the two so that one end thereof contacts the end wall 37 of the housing 11 and the other end contacts the end surface of the oil separator 38. Yes. Therefore, when the rear side block 13c, which is the other end of the cylinder 13, tries to vibrate in the radial direction of the cylinder 13 as the rotor 17 rotates, the vibration force acts on the elastic body 44 as a shearing force between the both ends.

  When the above-described shearing force is applied to the elastic body 44, the elastic body 44 functions to suppress deformation in the shearing direction along with elastic deformation. Therefore, radial vibration at the other end of the cylinder 13 is effectively suppressed. Further, since the elastic body 44 is only subjected to a static compressive force between the end wall 37 of the housing 11 and the other end of the cylinder 13, radial vibration at the other end of the cylinder 13 is elastic. No signal is transmitted to the housing 11 via 44.

  Therefore, according to the gas compressor 10 according to the present invention, it is possible to effectively suppress the vibration in the radial direction generated at the other end of the cylinder 13 with the rotation of the rotor 17 that is a rotating body. It is possible to reduce the vibration of the cylinder 13 caused by the noise and the noise caused by the vibration.

  Both ends of the elastic body 44 can be fixed to each of the end wall 37 and the other end of the cylinder 13 by using an adhesive, whereby the elastic body 44 is attached to the end wall in an unloaded state where it does not receive a compressive force. 37 and the other end of the cylinder 13 can be held.

  Moreover, when the airtightness of the high pressure chamber 35 can be maintained without using the annular seal member 25 between the cylinder 13 and the housing 11, the annular seal member 25 can be omitted.

  As described above, the present invention has been described along the example of a concentric vane-rotary gas compressor in which the cylinder has an elliptical cross-sectional shape, but the present invention is not limited thereto, and the cylinder has a circular cross-sectional shape, The present invention can be applied to a rotary gas compressor such as an eccentric vane-rotary type gas compressor or a scroll type gas compressor in which a rotor is arranged eccentrically with respect to a cylinder.

It is a longitudinal section showing a gas compressor concerning the present invention. It is the end elevation obtained along the II-II line | wire shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Gas compressor 11 Housing 12 Gas compression mechanism 13 Cylinder 13a Cylinder member 13b Front side block (end wall member)
13c Rear side block (end wall member)
14 Cylinder chamber 14a Compression chamber 16 Rotating shaft 17 Rotor (Rotating body)
20 Vane 21 Discharge Hole 24 Suction Hole 33 Suction Port 35 High Pressure Chamber 36 Discharge Port 37 Housing End Wall 38 Oil Separator 44 Elastic Body

Claims (5)

  A housing in which a suction port and a discharge port are formed; and a gas compression mechanism that is accommodated in the housing, compresses the gas sucked through the suction port, and discharges the compressed gas through the discharge port. The gas compression mechanism includes a cylinder that defines a cylinder chamber, and a rotating body that is rotatably accommodated in the cylinder chamber and that defines a compression chamber that increases and decreases the volume in order to suck and compress the gas as it rotates. The cylinder includes an elastic body that is rigidly coupled to the housing on one end side of the rotating shaft of the rotating body and receives a vibration force acting as a radial direction on the rotating shaft as a shearing force on the other end side. A gas compressor characterized by being elastically supported by the housing.   The rotating body includes a rotor that is rotatably disposed in the cylinder chamber and includes a vane that divides the cylinder chamber into a plurality of compression chambers in a circumferential direction, and the volume of the compression chamber increases with rotation of the rotor. The gas compressor according to claim 1, wherein the gas compressor is a vane-rotary type gas compressor that increases or decreases in number.   The cylinder chamber has an elliptical cross-sectional shape, and the cylinder chamber has a pair of discharge holes arranged opposite to each other in the radial direction of the cylinder chamber and communicating with the discharge port, and a diameter of the cylinder chamber. The gas compressor according to claim 2, wherein a pair of suction holes are provided so as to face each other and communicate with the suction port.   The cylinder includes a cylinder member that is open at both ends that defines a space for the cylinder chamber, and a pair of end wall members that are fixed to the cylinder member so as to hermetically close both open ends of the cylinder member. The cylinder is rigidly supported by the housing by bolting at one of the end wall members, and the other end wall member is disposed on the end wall of the housing opposite to the end wall member. The gas compressor according to claim 1, wherein the gas compressor is elastically supported via an elastic body.   A high-pressure chamber is defined between the other end wall member and the end wall of the housing so as to communicate with the discharge port and discharge compressed gas from the compression mechanism. The high-pressure chamber includes the high-pressure chamber. An oil separator for separating an oil component from the compressed gas discharged to the exhaust gas is disposed, the oil separator is coupled to the other end wall member, and the elastic body is connected to the oil separator and the end of the housing. The gas compressor according to claim 4, wherein the gas compressor is disposed between the walls in a state of being compressed between the two.

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