EP1783369A1 - Compresseur - Google Patents

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Publication number
EP1783369A1
EP1783369A1 EP06022860A EP06022860A EP1783369A1 EP 1783369 A1 EP1783369 A1 EP 1783369A1 EP 06022860 A EP06022860 A EP 06022860A EP 06022860 A EP06022860 A EP 06022860A EP 1783369 A1 EP1783369 A1 EP 1783369A1
Authority
EP
European Patent Office
Prior art keywords
thrust
receiving face
thrust bearing
wobble plate
compressor
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.)
Withdrawn
Application number
EP06022860A
Other languages
German (de)
English (en)
Inventor
Hiroyasu Nadamoto
Hiroshi Kageyama
Keigo Usui
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.)
Marelli Corp
Original Assignee
Calsonic Kansei 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 Calsonic Kansei Corp filed Critical Calsonic Kansei Corp
Publication of EP1783369A1 publication Critical patent/EP1783369A1/fr
Withdrawn legal-status Critical Current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
    • F04B27/1036—Component parts, details, e.g. sealings, lubrication
    • F04B27/1054—Actuating elements
    • F04B27/1063—Actuating-element bearing means or driving-axis bearing means

Definitions

  • the present invention relates to a compressor, and, more particularly, to a compressor useable in a refrigeration cycle of a vehicular air conditioner or the like to compress refrigerant.
  • the wobble plate type variable displacement compressor includes a shaft, a rotating base for integral rotation with the shaft, a wobble plate that is rotatably attached to the rotating base via a radial bearing and a thrust bearing, and pistons connected to an outer region of the wobble plate via pairs of hemispherical-shaped shoes.
  • the rotating base integrally rotates with the shaft, the wobble plate wobbles in a manner corresponding to the inclination angle of the rotating base, so that the pistons reciprocate.
  • the wobble plate does not rotate rapidly due to the friction with the shoes. Accordingly, the wobble plate type compressor has an advantage that the rotation moment (the torque) is small and the friction between the shoes and the wobble plate is low, compared to a swash plate type compressor in which a swash plate integrally rotates with a shaft.
  • a compression reaction force from the pistons is applied to an area around the upper dead center of the wobble plate.
  • the compression reaction force is set off from the center of the shaft (the center of the wobble plate) so that the wobble plate is pressed in such a manner that the wobble plate inclines with respect to the rotating base. Accordingly, the strong force is applied to an outer region of the thrust bearing located between the wobble plate and the rotating base. This force causes the outer region of rolling elements of the thrust baring to be subjected to excessive wear.
  • Japanese Patent Application Laid-Open No. 2003-328931 suggests locating a thrust bearing on an axial line of the pistons to receive the compression reaction force from the pistons. This location requires a large thrust bearing so that a flange formed on the rotating base and a flange formed on the wobble plate that sandwich the larger thrust bearing also have a large size.
  • the present invention was developed based on such a problem of the related art and provides a compressor in which damage of an outer region of a thrust bearing, caused by a compression reaction force, can be prevented without enlarging the size.
  • the first aspect of the present invention is a compressor including a thrust bearing having a pair of races; a first member and a second member sandwiching the thrust bearing therebetween; and a release portion that allows flexing of an outer region of one of races of the thrust bearing.
  • the second aspect of the present invention is a compressor including a thrust bearing; a first member and a second member sandwiching the thrust bearing therebetween; a first thrust receiving face formed on the first member and receiving the thrust bearing; and a second thrust receiving face formed on the second member and receiving the thrust bearing, at least one of the first thrust receiving face and second thrust receiving face being out of contact with an outer region of the thrust bearing.
  • the third aspect of the present invention is a compressor including a shaft; a rotating base configured to rotate with the shaft and having a first thrust receiving face; a wobble plate having a second thrust receiving face; a thrust bearing sandwiched between the first thrust receiving face and the second thrust receiving face such that the wobble plate is rotatable relative to the rotating base; and a piston engaged with the wobble plate for reciprocation corresponding to wobble movement of the wobble plate.
  • One of the first thrust receiving face and the second thrust receiving face is out of contact with an outer region of the thrust bearing.
  • the fourth aspect of the present invention is a compressor including a compressor housing having a first thrust receiving face; a shaft rotatably supported by the housing; a rotor fixed to the shaft to rotate with the shaft and having a second thrust receiving face; a piston configured to reciprocate corresponding to rotation of the rotor; and a thrust bearing sandwiched between the first thrust receiving face and the second thrust receiving face.
  • One of the first thrust receiving face and the second thrust receiving face is out of contact with an outer region of the thrust bearing.
  • Fig. 1 is an overall cross-sectional view showing a compressor according to the first embodiment.
  • the compressor 1 of the first embodiment is a wobble plate type variable displacement compressor.
  • the compressor 1 includes a cylinder block 2 having a plurality of cylinder bores 3 located evenly spaced apart in a circumferential direction, a front head 4 attached to a front end of the cylinder block 2 and having a crank chamber 5 therein, and a rear head 6 attached to a rear end of the cylinder block 2 via a valve plate 9 and having a suction chamber 7 and a discharge chamber 8 therein.
  • the cylinder block 2, the front head 4, and the rear head 6 are fixed to each other by a plurality of bolts 13 so as to compose a housing of the compressor.
  • the valve plate 9 has suction ports (not shown) that allow the cylinder bores 3 to communicate with the suction chamber 7 and discharge ports 12 that allow the cylinder bores 3 to communicate with the discharge chamber 8.
  • a valve system (not shown) adapted to open and close the suction ports is provided on the valve plate 9 at the cylinder block side.
  • a valve system (not shown) adapted to open and close the discharge ports 12 is provided on the valve plate 9 at the rear head side.
  • a drive shaft 10 is supported by radial bearings 17, 18 in support bores or holes 19, 20 that are formed at central portions of the cylinder block 2 and the front head 4 so that the drive shaft 10 is rotatable in the crank chamber 5.
  • a thrust bearing 16 is interposed between a thrust receiving face 83 of a rotor 21, fixed to the shaft 10, and a thrust receiving face 81 of the front head 4.
  • a thrust bearing 15 is interposed between a step (thrust receiving face) formed on the support bore 19 of the cylinder block 2 and a step (thrust receiving face) formed on the shaft 10.
  • the crank chamber 5 accommodates the rotor 21 fixed to the shaft 10, a sleeve 22 attached to the shaft 10 slidable in the axial direction, a rotating base 25 connected to the sleeve 22, such a ball joint structure, so as to be tiltable with respect to the axis of the shaft 10, a wobble plate 26 attached to the rotating base 25 via a radial bearing 63 and a thrust bearing 61 so as to be rotatable in a circumferential direction with respect to he rotating base 25, and a linkage mechanism 40 linking the rotor 21 and the rotating base 25 to transfer the rotation of the rotor 21 to the rotating base 25 as allowing changes of the inclination angle of the rotating base 25.
  • Pistons 29 are reciprocatably disposed in the cylinder bores 3. Each piston 29 is connected to the outer region of the wobble plate 26 via a pair of hemispherical-shaped piston shoes 30.
  • the compressor 1 of the present embodiment is not a double-ended wobble plate type variable displacement compressor in which the pistons 29 are provided on both sides of the wobble plate 26.
  • the present compressor is a single-ended wobble plate type variable displacement compressor on which the pistons 29 are provided in one side of the wobble plate 26.
  • the inclination angle of the wobble plate 26 is changeable. When the wobble plate 26 is moved toward the cylinder block 2 against the return spring 52, the inclination angle of the wobble plate 26 decreases. On the other hand, when the wobble plate 26 is moved away from the cylinder block 2 against the return spring 51, the inclination angle of the wobble plate 26 increases.
  • the inclination angle of the wobble plate 26 corresponds to the piston strokes and the discharging amount of the compressor 1.
  • a pressure difference (pressure balance) between the crank chamber pressure Pc, in back of the pistons 29, and the suction chamber pressure Ps, in front of the pistons 29, makes a change in the inclination angle of the wobble plate 26 to change piston strokes.
  • the compressor 1 has a pressure control mechanism.
  • the pressure control mechanism includes a gas extraction passage (not shown) that allows the crank chamber 5 to communicate with the suction chamber 7, a gas supply passage (not shown) that allows the crank chamber 5 to communicate with the discharge chamber 8, and a control valve 33 that is provided in the midstream of the gas supply passage to open and close the gas supply passage.
  • the rotating base 25 is formed with a substantially disk-like shaped flange 25b and a substantially tubular shaped boss 25a.
  • the wobble plate 26 is connected to the flange 25b via the thrust bearing 61 and to the boss 25a via the radial baring 63.
  • the wobble plate 26 is attached to the rotating base 25 under a precompression provided in a direction of the thrust load by a washer 65 and an adjusting screw 67.
  • the radial bearing 63 includes a pair of races 63a, 63b, balls 63c as rolling elements for rolling between the pair of races 63a, 63b, and a retainer 63d for retaining the balls 63c between the pair of races 63a, 63b.
  • the thrust bearing 61 includes a pair of races 61a, 61b, a plurality of column shaped needles 61c as rolling elements for rolling between the pair of races 61a, 61b, and a retainer 61d retaining the needles 61d between the pair of races 61a, 61b.
  • the compression reaction force Fp applied to the upper dead center of the wobble plate 26 or the area around the upper dead center is set off from the axis of the shaft 10, so that a thrust load between the rotating base 25 and the wobble plate 26 is off center from the axis of them.
  • the rotating base 25 and the wobble plate 26 relatively rotate in a condition in which the wobble plate 26 is pressed in an inclined manner with respect to the rotating base 25. Therefore, outer regions of the needles 61c of the thrust bearing 61 are strongly pressed between the races 61a, 61b. As a result, the needles 61c may be subjected to excessive wear.
  • an outer region of the race 61a is made so as to not contact with a thrust receiving face 71.
  • the trust receiving face 71 of the rotating base 25 has a slot or release portion 75 which allows flexure of the outer region of the race 61a.
  • the release portion 75 is defined by a recess 76 (a stepped portion 76 in this embodiment) which is formed on the thrust receiving face 71 of the rotating base 25 at an area corresponding to the outer region of the race 61a.
  • the recess 76 is recessed from the other parts of the thrust receiving face 71.
  • the recess 76 is formed in an annular shape along the outer region of the thrust bearing 61 and located at an inner side from outer ends of the needles 61c.
  • the first embodiment achieves about the following effects.
  • a release portion 75 is defined by a recess (a stepped portion 76) which is formed on the thrust receiving face 71 of the rotating base 25 at an area corresponding to the outer region of the race 61a.
  • a recess may be provided as a linear slope 76B.
  • a recess may be provided as a curved slope 76C.
  • a release portion 75 is formed on only a thrust receiving face 71 of a rotating base 25.
  • a release portion 77 may be formed, as a stepped portion 78 or the like, on a thrust receiving face 73 of a wobble plate 26 in addition to the release portion 75 formed on the thrust receiving face 71 of the rotating base 25.
  • release portions 79, 80 may be defined by forming outer ends of at least one of the races 61a, 61b and needles 61c to project from thrust receiving faces 71, 73.
  • the release portions can also comprise a simple structure.
  • the present invention is applied to a structure between the rotating base 25 and the wobble plate 26, which relatively rotate while sandwiching a thrust bearing 61 therebetween.
  • the present invention may be applied to a structure between a housing 4 of the compressor 1 and a rotor 21, which relatively rotate while sandwiching a thrust bearing 16 therebetween.
  • a recess (a stepped portion 86 in this embodiment) is formed on a thrust receiving face 81 of the housing 4, not on a thrust receiving face 83 of a rotor 21, so as to form a release portion 85.
  • a compressor according to the present invention includes a first member and a second member that are relatively rotate while sandwiching a thrust bearing therebetween and a release portion that allows deformation of an outer region of one of the races of the thrust bearing.
  • one of a thrust receiving face of the first member and a thrust receiving face of the second member is not in contact with the outer region of the thrust bearing.
EP06022860A 2005-11-04 2006-11-02 Compresseur Withdrawn EP1783369A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005321101A JP2007127074A (ja) 2005-11-04 2005-11-04 圧縮機

Publications (1)

Publication Number Publication Date
EP1783369A1 true EP1783369A1 (fr) 2007-05-09

Family

ID=37561771

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06022860A Withdrawn EP1783369A1 (fr) 2005-11-04 2006-11-02 Compresseur

Country Status (3)

Country Link
US (1) US20070101859A1 (fr)
EP (1) EP1783369A1 (fr)
JP (1) JP2007127074A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107023449A (zh) * 2017-05-26 2017-08-08 江苏昊科汽车空调有限公司 一种高稳定性长寿命行星盘式车载空调压缩机

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4751166B2 (ja) * 2005-10-12 2011-08-17 カルソニックカンセイ株式会社 可変容量圧縮機
KR20120072818A (ko) * 2010-12-24 2012-07-04 학교법인 두원학원 사판식 압축기
CN117738876A (zh) 2016-07-25 2024-03-22 开罗股份有限公司 摇摆板式压缩机和氧气浓缩器
CN107091309B (zh) * 2017-05-22 2024-04-12 江苏昊科汽车空调有限公司 一种压缩机电磁传动机构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1323310A (en) * 1970-12-08 1973-07-11 Orsta Hydraulik Betrieb K Hydrostatic axial cylinder machine
EP0287940A1 (fr) * 1987-04-22 1988-10-26 Diesel Kiki Co., Ltd. Compresseur à capacité variable
US4974702A (en) * 1989-01-27 1990-12-04 Kabushiki Kaisha Tyoda Jidoshokki Seisakusho Swash plate type compressor with thrust bearing lubricator
DE4441721A1 (de) * 1993-11-24 1995-06-01 Toyoda Automatic Loom Works Taumelscheibenkompressor
DE19530210A1 (de) * 1994-08-22 1996-02-29 Zexel Corp Taumelscheibenverdichter
US5596920A (en) * 1994-04-06 1997-01-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Swash plate type compressor

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
US4042309A (en) * 1974-08-26 1977-08-16 Sankyo Electric Company, Limited Refrigerant compressor
US4037993A (en) * 1976-04-23 1977-07-26 Borg-Warner Corporation Control system for variable displacement compressor
US4480964A (en) * 1982-02-25 1984-11-06 General Motors Corporation Refrigerant compressor lubrication system
US4543043A (en) * 1982-08-02 1985-09-24 Borg-Warner Corporation Variable displacement compressor
US4606705A (en) * 1985-08-02 1986-08-19 General Motors Corporation Variable displacement compressor control valve arrangement
US4732544A (en) * 1986-06-12 1988-03-22 Diesel Kiki Co., Ltd. Variable capacity wobble plate compressor
JPH0229876B2 (ja) * 1987-01-10 1990-07-03 Sanden Corp Shujikuokatamochishijishitakaitenshabanshikiatsushukuki
JPH0235983U (fr) * 1988-08-26 1990-03-08
JPH061782U (ja) * 1992-06-08 1994-01-14 株式会社豊田自動織機製作所 可変容量型斜板式圧縮機
JPH07301176A (ja) * 1994-05-02 1995-11-14 Toyota Autom Loom Works Ltd 両頭斜板式圧縮機
JPH08319944A (ja) * 1995-05-26 1996-12-03 Toyota Autom Loom Works Ltd 圧縮機
JPH10213070A (ja) * 1997-01-28 1998-08-11 Zexel Corp 冷媒圧縮機
JPH10220352A (ja) * 1997-02-10 1998-08-18 Zexel Corp 可変容量型揺動板式圧縮機
JP2002332969A (ja) * 2001-05-10 2002-11-22 Toyota Industries Corp 圧縮機

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1323310A (en) * 1970-12-08 1973-07-11 Orsta Hydraulik Betrieb K Hydrostatic axial cylinder machine
EP0287940A1 (fr) * 1987-04-22 1988-10-26 Diesel Kiki Co., Ltd. Compresseur à capacité variable
US4974702A (en) * 1989-01-27 1990-12-04 Kabushiki Kaisha Tyoda Jidoshokki Seisakusho Swash plate type compressor with thrust bearing lubricator
DE4441721A1 (de) * 1993-11-24 1995-06-01 Toyoda Automatic Loom Works Taumelscheibenkompressor
US5596920A (en) * 1994-04-06 1997-01-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Swash plate type compressor
DE19530210A1 (de) * 1994-08-22 1996-02-29 Zexel Corp Taumelscheibenverdichter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107023449A (zh) * 2017-05-26 2017-08-08 江苏昊科汽车空调有限公司 一种高稳定性长寿命行星盘式车载空调压缩机

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Publication number Publication date
JP2007127074A (ja) 2007-05-24
US20070101859A1 (en) 2007-05-10

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