JP2006063870A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor wherein projecting parts can be provided even in a narrow part of a gasket. <P>SOLUTION: Since the projecting parts 19a of the gasket 16 are projected in an elastic member 19 by integral molding, width of the projecting parts 19a can be reduced compared with projecting parts formed by deforming a metal plate. Thus, the projecting parts 19a can be provided even in the narrow part where opening parts 16a corresponding to respective cylinders are close to each other, and airtightness can be enhanced by the projecting parts 19a. Also, when the projecting parts 19a are locally concentrated, height dimensions H of the projecting parts 19a can be enlarged compared with the projecting parts formed by deforming the metal plate, and therefore, excellent sealing performance can be obtained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a compressor used in a refrigerant circuit of a vehicle air conditioner, for example.

  In general, this type of compressor includes a compressor body that sucks and discharges refrigerant, a plurality of cylinders having refrigerant inlets and outlets at one end, a plurality of pistons that reciprocate in each cylinder, and pistons. It is known that an inclined plate to be engaged and a drive shaft that is rotated by power from the outside are provided, and each piston is reciprocated by rotating the inclined plate together with the drive shaft (for example, patents). Reference 1).

  In this compressor, gaskets are interposed between the housing, the cylinder block, the valve plate, and the cylinder head, and each gasket is provided with at least one opening that communicates between the components. In this case, the gasket between the housing and the cylinder block is provided with an opening corresponding to the opening end face of the housing, and the gasket between the cylinder block and the valve plate is provided with a plurality of openings corresponding to each cylinder. It has been. The gasket between the valve plate and the cylinder head is provided with openings corresponding to the refrigerant discharge port and the refrigerant suction port. The refrigerant discharge port and the refrigerant suction port are respectively connected to the refrigerant discharge chamber and the refrigerant suction chamber in the cylinder head. Communicate.

Each gasket is provided with an annular protrusion around the opening, and the airtightness is enhanced by the pressure contact between the protrusion and the part. For example, the protrusion 1 shown in FIG. 9 is formed by deforming a part of a metal plate constituting the gasket into a chevron.
Japanese Utility Model Publication No. 4-125682

  However, when the protrusion 1 is formed by deforming a part of the metal plate into a mountain shape, since the inclined portion 1b is required between the flat portions 1a on both sides of the protrusion 1 and the top, the protrusion The width W becomes larger than the height H of 1. For this reason, there existed a problem that the protrusion 1 cannot be provided in a narrow part, for example, when the opening parts corresponding to a cylinder adjoin.

  The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a compressor capable of providing protrusions on a narrow portion of a gasket.

  In order to achieve the above object, the present invention provides a compressor body composed of a plurality of parts that are axially connected to each other, and at least one opening that is interposed between the parts of the compressor body and communicates between the parts. In a compressor provided with a projecting portion extending along the periphery of a predetermined portion including an opening on the surface of the gasket, the projecting portion projects from the surface of the gasket by integral molding. .

  Thereby, since the protrusion of the gasket is protruded by integral molding, the width of the protrusion can be formed smaller than the protrusion formed by deforming the metal plate. The height dimension of can also be increased.

  According to the present invention, since the width of the protrusion can be made smaller than that in which the protrusion is formed by deforming the metal plate, for example, the width in which the openings of the gasket are close to each other. A protrusion can be easily provided even in a narrow portion, and the airtightness of the gasket can be enhanced by the protrusion. Also, even when the protrusions are concentrated locally, the height of the protrusion can be increased compared with the case where the protrusion is formed by deforming the metal plate, so that a good sealing performance is achieved. Obtainable.

  1 to 8 show an embodiment of the present invention. FIG. 1 is a side sectional view of a compressor, FIG. 2 is a front view of a first gasket, and FIG. 3 is a front view of a second gasket. 4 is a front view of the third gasket, FIG. 5 is a side sectional view of an essential part thereof, FIG. 6 is a front view of the valve plate, FIG. 7 is a rear view of the valve plate, and FIG.

  The compressor shown in FIG. 1 includes a compressor main body 10 that sucks and discharges refrigerant, a plurality of pistons 20 provided in the compressor main body 10, an inclined plate 30 that engages with each piston 20, and an inclined plate 30. And a pulley 50 that is rotated by external power.

  The compressor body 10 includes a housing 11, a cylinder block 12, a cylinder head 13 and a valve plate 14 which are axially connected to each other by bolts (not shown), and the first, second and third gaskets are provided between these components. 15, 16, and 17 are interposed.

  The housing 11 is formed in a cylindrical shape with one end side closed, and the other end side opens to the cylinder block 12 side.

  The cylinder block 12 has a plurality of cylinders 12a extending in the axial direction of the compressor body 10, and both ends of each cylinder 12a are opened to the housing 11 side and the valve plate 14 side, respectively.

  The cylinder head 13 has a refrigerant discharge chamber 13a and a refrigerant suction chamber 13b, and each of the refrigerant discharge chamber 13a and the refrigerant suction chamber 13b opens to the cylinder block 12 side. The refrigerant discharge chamber 13a is provided at the center of the cylinder head 13 and communicates with an external discharge port (not shown). The refrigerant suction chamber 13b is provided around the refrigerant discharge chamber 13a and communicates with an external suction port (not shown).

  The valve plate 14 is disposed between the cylinder block 12 and the cylinder head 13 and has a plurality of refrigerant discharge holes 14a and refrigerant suction holes 14b communicating with each cylinder 12a. A discharge side plate 14c is arranged on one surface side (cylinder head 13 side) of the valve plate 14, and a discharge valve 14d for opening and closing each refrigerant discharge hole 14a is provided on the discharge side plate 14c. Further, a suction side plate 14e is disposed on the other surface side (cylinder block 12 side) of the valve plate 14, and a suction valve 14f for opening and closing each refrigerant suction hole 14b is provided on the suction side plate 14e.

  As shown in FIG. 8, each gasket 15, 16, 17 is formed by laminating elastic members 19 on both surfaces of a plate-like member 18, and a predetermined portion of each gasket 15, 16, 17 is formed on the surface of the elastic member 19. A projecting portion 19a having a semicircular cross section extending along the projection is provided. Each gasket 15, 16, and 17 is formed by, for example, laminating a film-like rubber material (for example, a thickness of 50 to 100 microns) serving as the elastic member 19 on both surfaces of the plate-like member 18, and using a predetermined mold in the thickness direction. Manufactured by compressing and vulcanizing the rubber material. At that time, by using a mold provided with a recess corresponding to the protrusion 19a, the protrusion 19a having a predetermined height H (for example, 0.2 to 0.4 mm) is integrally formed on the surface of the elastic member 19. . The plate member 18 is made of a metal material such as steel or aluminum, and the elastic member 19 is made of a rubber material such as silicon, EPDM, or HNBR.

  The first gasket 15 is disposed between the housing 11 and the cylinder block 12 and has an opening 15 a corresponding to the opening end surface of the housing 11. In this case, protrusions 19a are provided along the outer periphery of the first gasket 15 and the periphery of the opening 15a.

  The second gasket 16 is disposed between the cylinder block 12 and the suction side plate 14 e of the valve plate 14, and has a plurality of openings 16 a corresponding to the cylinders 12. In this case, the protrusion 19a is provided along the outer periphery of the second gasket 16 and the periphery of each opening 16a.

  The third gasket 17 is disposed between the discharge side plate 14c of the valve plate 14 and the cylinder head 13, and has a plurality of openings 17a and 17b corresponding to the refrigerant discharge holes 14a and the refrigerant suction holes 14b of the valve plate 14, respectively. Have. In this case, the protrusion 19a is provided along the outer peripheral edge of the third gasket 17 and the periphery of the bolt insertion hole 17c, the portion including each opening 17a corresponding to each refrigerant discharge hole 14a, and each refrigerant suction. A protrusion 19a is provided between the portion including each opening 17b corresponding to the hole 14b. The third gasket 17 is integrally provided with a plurality of retainer portions 17d as valve contact portions that regulate the opening degree of the discharge valve 14d to a predetermined opening degree. Each retainer part 17d is formed by deforming a part of the gasket 17 so as to incline toward the cylinder head 13, and an opening 17b on the discharge side is disposed at the tip end side in the inclination direction. That is, the opening degree of the discharge valve 14d is regulated by the discharge valve 14d coming into contact with the retainer 17d.

  Each piston 20 is slidably provided in each cylinder 12a, and an engaging portion 21 that engages with the inclined plate 30 is formed at one end thereof. The engaging portion 21 has a pair of hemispherical surfaces facing each other, and a hemispherical shoe 22 is slidably provided between the hemispherical surfaces.

  The inclined plate 30 is provided so as to be tiltable with respect to the axial direction of the drive shaft 40, and the engaging portion 21 of each piston 20 is slidably engaged with the peripheral portion thereof via a shoe 22. The inclined plate 30 is connected to a rotating plate 31 that rotates integrally with the drive shaft 40 so as to be tiltable. The inclined plate 30 is rotated about the drive shaft 40 by the rotating plate 31, and each piston 20 is moved by a stroke amount corresponding to the inclined angle. It is designed to reciprocate.

  One end of the drive shaft 40 is rotatably supported by the housing 11, and the other end is rotatably supported by the cylinder block 12.

  The pulley 50 is rotatably supported on one end side of the housing 11 so that power from the outside is transmitted through a V belt (not shown). Although not shown, a power transmission mechanism 51 with a torque limiter is provided between one end of the drive shaft 40 and the pulley 50, and the rotational force of the pulley 50 is transmitted via the power transmission mechanism 51. Is transmitted to. It should be noted that the torque limiter of the power transmission mechanism 51 is configured to interrupt the transmission of power by breaking some members when a torque of a predetermined magnitude or greater is applied.

  In the compressor configured as described above, when the drive shaft 40 is rotated by an external driving force, each piston 20 reciprocates in each cylinder 12 a according to the inclination angle of the inclined plate 30. As a result, the refrigerant in the refrigerant suction chamber 13b is sucked into each cylinder 12a and discharged into the refrigerant discharge chamber 13a. At that time, the pressure in the housing 11 is adjusted by a pressure control means (not shown), and the pressure applied to the other end side (housing 11 side) of each piston 20 due to the differential pressure generated between the refrigerant suction chamber 13b and the housing 11. Accordingly, the inclination angle of the inclined plate 30 changes. Thereby, the stroke amount of each piston 20 becomes large or small, and the discharge amount of the refrigerant changes.

  In the compressor, the airtightness of the compressor main body 10 is maintained by the gaskets 15, 16, and 17 disposed between the housing 11, the cylinder block 12, the cylinder head 13, and the valve plate 14. At this time, since the protrusions 19a are provided on the gaskets 15, 16, and 17, the pressure contact force concentrates on the protrusions 19a, thereby improving the airtightness.

  According to the present embodiment, since the protrusions 19a of the gaskets 15, 16, and 17 are protruded from the elastic member 19 by integral molding, the metal plate is deformed to form the protrusions. In comparison, the width W of the protrusion 19a can be reduced. Thus, for example, the protrusion 19a can be provided in a narrow portion where the opening 16a corresponding to each cylinder 12 is close to each other like the second gasket 16, and the airtightness is improved by the protrusion 19a. be able to. Further, even when the protrusions 19a are locally concentrated, the height dimension H of the protrusions 19a can be increased as compared with the case where the protrusions are formed by deforming the metal plate. Sealing performance can be obtained.

  In this case, each gasket 15, 16, 17 is formed by laminating the elastic member 19 on the surface of the plate-like member 18, and the protrusion 19 a is projected from a predetermined portion of the elastic member 19. While the strength is increased by the member 18, the protrusion 19 a can be provided on the elastic member 19 that is easy to mold, and durability and productivity can be improved.

  Further, the retainer portion 17d for restricting the opening degree of the discharge valve 14d to a predetermined opening degree is provided integrally with the third gasket 17 disposed between the discharge side plate 14c of the valve plate 14 and the cylinder head 13. It is not necessary to use a retainer as a separate part, and the number of parts can be reduced.

  In the above embodiment, the gaskets 15, 16, and 17 are formed by laminating the elastic member 19 on the surface of the plate-like member 18. However, for example, a single plastic such as phenol resin is used. You may make it integrally mold a gasket and a protrusion with material.

Side surface sectional drawing of the compressor which shows one Embodiment of this invention Front view of the first gasket Front view of the second gasket Front view of the third gasket Side sectional view of the main part of the third gasket Front view of valve plate Rear view of valve plate Main section of gasket Sectional view of a protrusion showing a conventional example

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Compressor main body, 11 ... Housing, 12 ... Cylinder block, 13 ... Cylinder head, 14 ... Valve plate, 15 ... 1st gasket, 15a ... Opening part, 16 ... 2nd gasket, 16a ... Opening part, 17 ... 3rd gasket, 17a, 17b ... Opening part, 17d ... Retainer part, 18 ... Plate-shaped member, 19 ... Elastic member, 19 ... Projection part.

Claims (8)

A surface of the gasket, comprising: a compressor body composed of a plurality of parts connected to each other in the axial direction; and a gasket having at least one opening interposed between the parts of the compressor body and communicating between the parts. In the compressor provided with a protrusion extending along the periphery of the predetermined portion including the opening,
The compressor is characterized in that the protrusion is provided on the surface of the gasket by integral molding. Forming the gasket by laminating an elastic member on the surface of the plate-like member;
The compressor according to claim 1, wherein the protrusion is integrally provided on the elastic member. The compressor according to claim 2, wherein the plate member is formed of a metal material. The compressor according to claim 2 or 3, wherein the elastic member is formed of a rubber material. An opening corresponding to the opening end surface of the housing is provided in the gasket interposed between the housing and the cylinder head as a component of the compressor body,
The compressor according to claim 1, 2, 3, or 4, wherein the protrusion is provided along the periphery of the opening in the gasket. A gasket interposed between the cylinder block and the valve plate as a component of the compressor body is provided with a plurality of openings corresponding to the cylinders of the cylinder block,
The compressor according to claim 1, 2, 3, or 4, wherein the gasket is provided with the protrusion along the periphery of each opening. A gasket interposed between the valve plate and the cylinder head as a component of the compressor body is provided with a plurality of openings corresponding to the refrigerant discharge hole and the refrigerant suction hole of the valve plate,
The said protrusion was provided in the gasket between the part containing the opening part corresponding to a refrigerant | coolant discharge hole, and the part containing the opening part corresponding to a refrigerant | coolant suction hole, The 1, 2, 3, or 4 characterized by the above-mentioned. The compressor described. The compressor according to claim 7, wherein a valve contact portion for restricting an opening degree of a discharge valve of the valve plate to a predetermined opening degree is provided integrally with the gasket.

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