US20060147330A1 - Gasket for compressor - Google Patents

Gasket for compressor Download PDF

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Publication number
US20060147330A1
US20060147330A1 US10/540,578 US54057805A US2006147330A1 US 20060147330 A1 US20060147330 A1 US 20060147330A1 US 54057805 A US54057805 A US 54057805A US 2006147330 A1 US2006147330 A1 US 2006147330A1
Authority
US
United States
Prior art keywords
gasket
compressor
compressor according
force
fed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/540,578
Other languages
English (en)
Inventor
Hiroshi Kanai
Shunichi Furuya
Osamu Takazawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Thermal Systems Japan Corp
Original Assignee
Zexel Valeo Climate Control Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zexel Valeo Climate Control Corp filed Critical Zexel Valeo Climate Control Corp
Assigned to ZEXEL VALEO CLIMATE CONTROL CORPORATION reassignment ZEXEL VALEO CLIMATE CONTROL CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TAKAZAWA, OSAMU, FURUYA, SHUNICHI, HAYASHI, SAKAE, KANAI, HIROSHI
Publication of US20060147330A1 publication Critical patent/US20060147330A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/1009—Distribution members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B27/1036—Component parts, details, e.g. sealings, lubrication
    • F04B27/1081—Casings, housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/125—Cylinder heads

Definitions

  • the present invention relates to a gasket used in a compressor and more specifically, it relates to a structure that achieves both an improvement in the sealability and miniaturization of the compressor.
  • a compressor used as an element constituting part of a refrigerating cycle includes a gasket so as to prevent leakage of compressed coolant through areas where the housing is connected and the like.
  • gaskets include one in which ring-like beads are formed each surrounding one of the cylinders (see Japanese Unexamined Patent Publication No. H11-343974). These ring-like beads with their sections rising in a U-shape increase the force with which a gasket comes in contact with the areas around the cylinders and, as a result, leakage of the high-pressure coolant inside the cylinder to the outside can be prevented more effectively.
  • beads are each made to curve over the entire width of a sealing portion (see Japanese Unexamined Patent Publication No. H10-196535. This structure is supposed to ensure that the beads are still allowed to become deformed readily even when the gasket has a large wall thickness.
  • the invention disclosed in Japanese Unexamined Patent Publication No. H11-343974 has a problem in that since the levels of pressure required to deform the beads (full beads) with the U-shaped section is relatively high, the desired effect cannot be achieved with ease in conjunction with a gasket with a significant wall thickness. For instance, if the gasket is also to function as a retainer for regulating the movement of a discharge valve, the wall thickness of the gasket needs to be increased to ensure a higher level of gasket strength. For this reason, it is difficult to provide a gasket with a retainer function in conjunction with the full beads, and the difficulty becomes more pronounced in a CO 2 cycle in which the discharge pressure reaches approximately 10 MPa.
  • an object of the present invention is to provide a gasket used in a compressor, which contributes to both an improvement of the sealability and miniaturization of the compressor.
  • the present invention provides a gasket for a compressor used in a compressor in which a fluid is force-fed, having a raised portion that rises so as to surround a sealed portion and characterized in that the end of the raised portion on the inner edge side and a base surface of the gasket are not positioned on a single plane.
  • the raised portion according to the present invention can be referred to as a “half bead” as opposed to the “full bead” with the U-shaped section disclosed in patent reference literature 1 mentioned earlier.
  • the full bead in the related art rises from its base surface to the vertex of the U-shape and then makes a U-turn to the point the height of which is the same as the height of the base surface so as to set the end of the bead on the inner edge side substantially to the height of the base surface
  • the half bead according to the present invention has an end thereof at a point arising from the base surface to a predetermined height and thus at least part of the U-turn portion ranging from the vertex to the base surface in the related art is not included in the half bead.
  • the raised portion is allowed to contact at high pressure the area around the sealed portion such as a cylinder to assure high sealability. Furthermore, since the raised portion does not have the U-turn portion, the entire width of the gasket can be reduced to realize overall miniaturization of the compressor. In addition, since a desirable level of flexure is retained at the raised portion assuming the structure described above, the raised portion can be deformed readily even when the gasket has a large wall thickness.
  • the raised portion be constituted with a flat surface positioned at a height different from the height of the base surface and an inclined surface linking the flat surface and the base surface with a predetermined angle of inclination.
  • the raised portion assumes a gently sloping shape or the shape of a shallow bowl.
  • the inclined surface With such a gasket clamped at a specific position, the inclined surface becomes compressed and deformed to assume a flat shape which, in turn, causes the area where the inclined surface links with the base surface and the area where the inclined surface links with the flat surface to press against the sealed portion with a significant force, thereby assuring a high level of sealability.
  • the angle of inclination of the inclined surface should be adjusted as necessary in correspondence to the required level of sealability, the inclined surface should not be inclined at a right angle since the inclined surface needs to become deformed into a flat shape.
  • the inner edge of the flat surface of the raised portion surrounding a cylinder formed at the cylinder block should not form a circle.
  • the raised portion should assume a noncircular shape according to the present invention as described above, mainly in consideration of the shape of the intake valve.
  • the outer edge of the flat surface should not assume a shape similar to the shape of the inner edge of the flat surface. It is desirable that the outer edge of the flat surface be in contact with the intake valve in its entirety and that only a specific portion of the inner edge of the flat surface be in contact with the intake valve.
  • the specific portion ideally is an area corresponding to a connecting base at which the lead portion of the intake valve is connected.
  • a raised portion should be disposed at least at a location at which a high/low pressure barrier wall is sealed and a location at which an atmospheric pressure barrier wall is sealed.
  • the high/low pressure barrier wall separates a discharge chamber and an intake chamber both defined within the cylinder head from each other, whereas the atmospheric pressure barrier wall separates the inner space of the housing from the outside.
  • a high level of sealability must be assured at the high/low pressure barrier wall and the atmospheric pressure barrier wall each separating two spaces with greatly differing pressures.
  • the full advantage of the raised portion can be yielded by forming the inclined surface so as to set it in contact with the high/low pressure barrier wall or the atmospheric pressure barrier wall.
  • the gasket include a retainer portion for regulating the operation of a discharge valve.
  • a discharge valve is normally disposed adjacent to the gasket between the valve plate and the cylinder head, and the gasket having a retainer function will help reduce the number of required parts and simplify the structure.
  • the gasket for a compressor according to the present invention sustains a desirable level of flexure at the raised portion and is thus fully functional even when the wall thickness is increased to assure the retainer function.
  • the gasket for a compressor according to the present invention assuring a high level of sealability and contributing to miniaturization is particularly ideal in applications in compressors used to force feed carbon dioxide under high-pressure conditions, the miniaturization of which is eagerly sought after.
  • FIG. 1 is a sectional view of the structure of a compressor achieved in an embodiment of the present invention
  • FIG. 2 is an enlarged sectional view of the structure of the member clamped between the cylinder block and the rear head (cylinder head);
  • FIG. 3 is a perspective of a structural example that may be adopted in the intake valve-side gasket in the embodiment
  • FIG. 4 presents an enlarged top view and sectional view both showing the structure of a raised portion in the intake valve-side gasket
  • FIG. 5 is a top view showing the relationship between the raised portion in the intake valve-side gasket and the intake valve in a partial enlargement
  • FIG. 6 is a sectional view illustrating the advantage realized with the raised portion in the gasket according to the present invention in a partial enlargement
  • FIG. 7 is a sectional view showing the structure adopted in the discharge valve-side gasket in the embodiment in a partial enlargement
  • FIG. 8 presents a structural example that may be adopted in the rear head (cylinder head) in the embodiment in a top view illustrating the structures of the high/low pressure barrier wall and the atmospheric pressure barrier wall;
  • FIG. 9 ( a ) is a sectional view taken at a 90° angle relative to the line A-A′ in FIG. 7 , showing the structure adopted in the area around the retainer portion in the embodiment in a partial enlargement and FIG. 9 ( b ) illustrates the retainer effect achieved in the embodiment.
  • a compressor 1 in FIG. 1 which constitutes part of a supercritical vapor compressing refrigerating cycle (CO 2 cycle) in which carbon dioxide is used as the coolant, comprises a cylinder block 2 , a front-side cylinder head (hereafter referred to as the front-head) 3 , a rear-side cylinder head (hereafter referred to as the rear head) 4 , a valve plate 5 , intake valves 6 , discharge valves 7 , an intake valve-side gasket 10 , a discharge valve-side gasket 11 , a drive shaft 14 , a swash plate mechanism 15 , pistons 16 , pins 20 , 21 and the like.
  • CO 2 cycle supercritical vapor compressing refrigerating cycle
  • a plurality of cylinders 25 are formed at the cylinder block 2 , with a piston 16 slidably inserted at each cylinder 25 .
  • an intake valve regulating portion 29 is formed, which regulates the opening operation of the intake valve 6 .
  • an intake chamber 27 and a discharge chamber 28 are defined so as to face opposite each cylinder 25 .
  • a hollow crank case 30 is defined, with the swash plate mechanism 15 which includes a swash plate 32 and an angle-adjusting the mechanism 33 disposed inside the crank case 30 .
  • the drive shaft 14 is rotatably held by bearings and the like formed at the front head 3 and the cylinder block 2 and is linked to the swash plate mechanism 15 so as to communicate a drive force to the swash plate mechanism 15 .
  • the intake valve-side gasket 10 , the intake valve 6 , the valve plate 5 , the discharge valve 7 and the discharge valve-side gasket 11 are clamped between the cylinder block 2 and the rear head 4 .
  • the intake valve-side gasket 10 which is disposed between the cylinder block 2 and the intake valve 6 (the valve plate 5 ), includes a base surface 30 , raised portions 35 and through holes 42 , as shown in FIGS. 2 through 4 .
  • FIG. 3 shows an example of a structure that may be adopted in an intake valve-side gasket 10 used in a compressor 1 having seven cylinders 25 , with the raised portions 35 formed at specific positions so as to surround each cylinder 25 .
  • the raised portions 35 each include a flat surface 40 and an inclined surface 41 , with the flat surface 40 set at the position raised from the base surface 30 by a predetermined extent and ranging substantially parallel to the base surface 30 .
  • the inclined surface 41 achieving a specific angle of inclination links the flat surface 40 and the base surface 30 . Consequently, an end 43 of the flat surface 40 and the base surface 30 are set at positions with differing heights.
  • an inner edge 44 of the flat surface 40 does not assume a circular shape and an outer edge 45 of the flat surface 40 does not have a shape similar to that of the inner edge 44 at the raised portion 35 in the intake valve-side gasket 10 , as shown in FIG. 4 , due to consideration for the shape of the intake valve 6 shown in FIG. 5 .
  • FIG. 6 shows a raised portion 35 in the intake valve-side gasket 10 clamped between the cylinder block 2 and an intake valve 6 .
  • the rear side of the base surface 30 comes in contact with the cylinder block 2 and the flat surface 40 comes in contact with the intake valve 6 so as to flatten the inclined surface 41 .
  • a linking area 50 where the base surface 30 and the inclined surface 41 link with each other and a linking area 51 where the flat surface 40 and the inclined surface 41 link with each other become pressed with a significant force, thereby achieving a high level of sealability.
  • the raised portion 35 according to the present invention does not have a U-turn portion ranging from the vertex of the U-shape to the base surface present in the bead (full bead) with the U-shaped section in the related art, the absence of the U-turn portion allows the overall width of the gasket to be reduced.
  • full beads with, for instance, a width of 4 mm in the related art can be replaced with half beads with a width of 2 mm to reduce the external diameter of the compressor by 4 mm.
  • a desirable level of flexure is sustained at the raised portions 35 according to the present invention, which allows the present invention to be adopted in an ideal manner even when the gasket has a significant wall thickness.
  • the discharge valve-side gasket 11 disposed between the valve plate 5 (a discharge valve 7 ) and the rear head 4 includes raised portions 60 and a retainer portion 65 as shown in FIGS. 2 and 7 .
  • the raised portions 60 each include a flat surface 61 and an inclined surface 62 , and the raised portions 60 are disposed at a position facing opposite a high/low pressure barrier wall 70 separating an intake chamber 27 from the corresponding discharge chamber 28 formed in the rear head 4 and an atmospheric pressure barrier wall 71 separating the space inside the discharge chamber 28 from the outside of the housing (the atmosphere) with the inclined surfaces 62 made to come in contact with the barrier walls 70 and 71 .
  • FIG. 8 shows an example of a structure that may be adopted in the rear head 3 (the high/low pressure barrier wall 70 and the atmospheric pressure barrier wall 71 ) used in conjunction with a compressor 1 having seven cylinders 25 .
  • the raised portions 60 are disposed so as to surround the intake chambers 27 and discharge chambers 28 along the barrier walls 70 and 71 .
  • the flat surfaces 61 and the inclined surfaces 62 basically adopt shape characteristics and functions identical to those of the flat surfaces 40 and the inclined surfaces 41 at the raised portions 35 in the intake valve-side gasket 6 described earlier, the inner edges of the flat surfaces 61 , unlike the inner edges of the flat surfaces 40 , do not need to assume a noncircular shape or the inner edges and the outer edges of the flat surfaces 61 do not need to be asymmetrical with respect to each other, as long as the flat surfaces 61 and inclined surfaces 62 achieve shapes matching those of the barrier walls 70 and 71 .
  • the retainer portions 65 provided to regulate the valve opening operation of the discharge valves 7 are each formed by raising the discharge valve-side gasket 11 toward the discharge chamber 28 , as shown in FIGS. 2 and 9 ( a ).
  • a retainer hold 72 is formed inside the discharge chambers 28 at the rear head 4 .
  • the retainer holds 72 are each formed so as to press against an area corresponding to a connecting base 75 of a lead portion 74 of the discharge valve 7 .
  • the presence of the retainer holds 65 in the discharge valve-side gasket 11 contributes to a reduction in the number of required parts and further structural simplification. Furthermore, since a desired level of flexure is assured at the raised portions 60 in the gasket according to the present invention, the present invention can be adopted in an ideal manner even when the gasket has a large wall thickness in order to assure its retaining function.
  • the gasket for a compressor according to the present invention is not limited to this example and all of or some of the raised portions 35 and 60 may be formed so as to rise toward the sides opposite from those in the structure described above. Namely, the raised portions 35 at the intake valve-side gasket 10 may rise toward the cylinder block 2 and the raised portion 60 at the discharge valve-side gasket 11 may rise toward the discharge valve 7 (valve plate).
  • the present invention with the raised portions surrounding sealed portions formed as described above, a high level of sealability is assured and the compressor can be realized as a compact unit.
  • the gasket has a larger wall thickness in order to achieve a retainer function at the gasket, a desirable level of flexure is still maintained at the raised portions and thus, the present invention can be adopted in an ideal manner even when the gasket has a significant wall thickness.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Gasket Seals (AREA)
US10/540,578 2002-12-26 2003-11-13 Gasket for compressor Abandoned US20060147330A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2002-376860 2002-12-26
JP2002376860 2002-12-26
PCT/JP2003/014429 WO2004061305A1 (ja) 2002-12-26 2003-11-13 コンプレッサ用ガスケット

Publications (1)

Publication Number Publication Date
US20060147330A1 true US20060147330A1 (en) 2006-07-06

Family

ID=32708282

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/540,578 Abandoned US20060147330A1 (en) 2002-12-26 2003-11-13 Gasket for compressor

Country Status (5)

Country Link
US (1) US20060147330A1 (de)
EP (1) EP1586773B1 (de)
JP (1) JP4573165B2 (de)
DE (1) DE60329332D1 (de)
WO (1) WO2004061305A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080063550A1 (en) * 2006-09-07 2008-03-13 Masaki Inoue Piston type compressor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007154834A (ja) * 2005-12-07 2007-06-21 Toyota Industries Corp ピストン式圧縮機

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4764091A (en) * 1985-12-05 1988-08-16 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Piston type compressor for air conditioning unit with asymmetric valve mechanisms
US5582415A (en) * 1993-08-31 1996-12-10 Kokusan Parts Industry Co., Ltd. Metal gasket
US5857839A (en) * 1993-08-10 1999-01-12 Sanden Corporation Compressor having noise and vibration reducing reed valve
US5988651A (en) * 1996-10-07 1999-11-23 Ishikawa Gasket Co., Ltd. Metal gasket with sealing bead and bead protecting portion
US20010019698A1 (en) * 1998-03-09 2001-09-06 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Single-ended swash plate compressor

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0612095B2 (ja) * 1985-05-09 1994-02-16 日本メタルガスケット株式会社 単板金属ガスケット
JP2532406Y2 (ja) * 1991-05-09 1997-04-16 株式会社豊田自動織機製作所 圧縮機のリテーナ一体ガスケット
JPH0640389U (ja) * 1992-10-28 1994-05-27 サンデン株式会社 圧縮機の吐出弁装置
JPH08232759A (ja) * 1995-02-22 1996-09-10 Nippon Gasket Co Ltd 排気マニホルド用金属ガスケット
JPH109136A (ja) * 1996-06-24 1998-01-13 Toyota Autom Loom Works Ltd 圧縮機
JPH10196535A (ja) * 1997-01-08 1998-07-31 Toyota Autom Loom Works Ltd 圧縮機用ガスケット
JPH11343974A (ja) * 1998-05-29 1999-12-14 Toyota Autom Loom Works Ltd 往復動型圧縮機
JP2000018154A (ja) * 1998-07-01 2000-01-18 Toyota Autom Loom Works Ltd 往復動型圧縮機
JP2001132629A (ja) * 1999-11-09 2001-05-18 Zexel Valeo Climate Control Corp 斜板式圧縮機
JP2002013640A (ja) * 2000-06-29 2002-01-18 Uchiyama Mfg Corp シリンダヘッドガスケット
JP2002070739A (ja) * 2000-08-30 2002-03-08 Zexel Valeo Climate Control Corp 往復式冷媒圧縮機
JP2002323135A (ja) * 2001-04-25 2002-11-08 Nippon Gasket Co Ltd 単層金属ガスケット

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4764091A (en) * 1985-12-05 1988-08-16 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Piston type compressor for air conditioning unit with asymmetric valve mechanisms
US5857839A (en) * 1993-08-10 1999-01-12 Sanden Corporation Compressor having noise and vibration reducing reed valve
US5582415A (en) * 1993-08-31 1996-12-10 Kokusan Parts Industry Co., Ltd. Metal gasket
US5988651A (en) * 1996-10-07 1999-11-23 Ishikawa Gasket Co., Ltd. Metal gasket with sealing bead and bead protecting portion
US20010019698A1 (en) * 1998-03-09 2001-09-06 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Single-ended swash plate compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080063550A1 (en) * 2006-09-07 2008-03-13 Masaki Inoue Piston type compressor

Also Published As

Publication number Publication date
EP1586773B1 (de) 2009-09-16
WO2004061305A1 (ja) 2004-07-22
DE60329332D1 (de) 2009-10-29
JPWO2004061305A1 (ja) 2006-05-11
EP1586773A4 (de) 2006-05-24
JP4573165B2 (ja) 2010-11-04
EP1586773A1 (de) 2005-10-19

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ZEXEL VALEO CLIMATE CONTROL CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KANAI, HIROSHI;FURUYA, SHUNICHI;TAKAZAWA, OSAMU;AND OTHERS;REEL/FRAME:017610/0522;SIGNING DATES FROM 20050519 TO 20050524

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION