EP0697522A1 - Scroll compressor - Google Patents

Scroll compressor Download PDF

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Publication number
EP0697522A1
EP0697522A1 EP95110171A EP95110171A EP0697522A1 EP 0697522 A1 EP0697522 A1 EP 0697522A1 EP 95110171 A EP95110171 A EP 95110171A EP 95110171 A EP95110171 A EP 95110171A EP 0697522 A1 EP0697522 A1 EP 0697522A1
Authority
EP
European Patent Office
Prior art keywords
scroll
end plate
swivel
thrust
swivel scroll
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Withdrawn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
EP95110171A
Other languages
German (de)
English (en)
French (fr)
Inventor
Takayuki Mitsubishi Jukogyo K.K. Iio
Shigeki Mitsubishi Jukogyo K.K. Miura
Ryuhei Mitsubishi Jukogyo K.K. Tanigaki
Mikihiko Mitsubishi Jukogyo K.K. Ishii
Makoto C/O Nagoya R&D Ctr Of Mitsubishi Takeuchi
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP0697522A1 publication Critical patent/EP0697522A1/en
Withdrawn legal-status Critical Current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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/91—Coating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/90—Coating; Surface treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/04—PTFE [PolyTetraFluorEthylene]

Definitions

  • the present invention relates to a scroll type compressor.
  • a hermetic housing being designated by numeral 1
  • a hermetic housing consists of a cup-like body 2, a front end plate 4 fixed thereto by bolts 3 and a cylindrical element 6 fixed thereto by bolts 5.
  • a rotating shaft 7, passing through said cylindrical element 6, is supported rotatably by bearings 8 and 9 in the hermetic housing 1.
  • a stationary scroll 10 and a swivel scroll 14 are built-in in the hermetic housing 1.
  • Said stationary scroll 10 has an end plate 11 and a spiral wrap 12 provided standingly on its inner surface, said end plate 11 being tied to the cup-like body 2 by bolts 13 and the stationary scroll 10 being thereby fixed in the housing 1.
  • the outer circumferential surface of the end plate 11 and the inner circumferential surface of the cup-like body 2 being sealingly contacted each other, thereby the inner space of the housing 1 being partitioned, a discharge cavity 31 is formed on the outer side of the end plate 11 and a suction cell 28 is defined on the inner side of the end plate 11.
  • a discharge port 29 is digged so that opening and closing of the discharge port 29 is made by a discharge valve 30.
  • the swivel scroll 14 has an end plate 15 and a spiral wrap 16 provided standingly on its inner surface, said spiral wrap 16 being of substantially same dimensions and shape as the spiral wrap 12 of the stationary scroll 10.
  • the swivel scroll 14 and the stationary scroll 10 are provided each other eccentrically by a length of a radius of the revolution and engaged each other with a deviation of angle of 180 degrees, as shown in the figure.
  • a tip seal 17 provided burriedly on the top surface of the spiral wrap 12 being sealingly contacted to the inner surface of the end plate 15
  • a tip seal 18 provided burriedly on the top surface of the spiral wrap 16 being sealingly contacted to the inner surface of the end plate 11
  • the side surfaces of spiral wraps 12 and 16 make line contacts each other at a plurality of places, thereby a plurality of compression chambers 19a and 19b, being nearly in a point symmetry each other around the centers of the spirals, are formed and a cell 22 is formed at the central part of the spirals.
  • a drive bush 21 is insertedly provided and is rotatable on a revolutional bearing 23, and within a slide hole 24 digged in said drive bush 21, an eccentric drive pin 25, projecting from the inner end of the rotating shaft 7, is provided slidably.
  • Said drive bush 21 is fitted with a balance weight 27 for balancing dynamic unbalances caused by revolutional swivel motions of the swivel scroll.
  • Numeral 26 designates a rotation preventing mechanism consisting of an Oldham link for allowing revolutional swivel motions of the swivel scroll 14 but preventing a rotation thereof
  • numeral 36 designates a thrust slide bearing
  • numeral 37 designates a balance weight fixed to the rotating shaft 7.
  • the swivel scroll 14 With rotation of the rotating shaft 7, the swivel scroll 14 is driven via swivel drive mechanism consisting of the eccentric drive pin 25, drive bush 21, boss 20, etc. and the swivel scroll 14, being prevented from rotating by the rotation preventing mechanism 26, does revolutional swivel motions on a circular track having a radius of the revolution, i.e. a radius being the eccentricity amount between the rotating shaft 7 and the eccentric drive pin 25.
  • a thrust load works on the swivel scroll 14.
  • Said thrust load is supported by a thrust surface 4a formed on an inner end surface of a front end plate 4 via a thrust slide bearing 36 contacting slidably to an outer circumferential edge of an outer surface 15a of the end plate 15 of the swivel scroll 14.
  • Said thrust slide bearing 36 being made of a thin plate of steel like SK material (carbon tool steel), etc., is provided on the inner end-surface of the front end plate 4 with a measure of preventing round motions so that the thrust slide bearing does not revolve together with the swivel scroll 14 even when the swivel scroll 14 is making revolutional swivel motions.
  • the outer surface 15a of the end plate 15 of the swivel scroll 14 and the sliding surface of the thrust slide bearing 36 contacting slidably thereto are lubricated by mists of lubricating oil contained in the gas refrigerant sucked into the suction chamber 28.
  • the compressor is operated for long hours, the refrigerant remains stagnantly in the hermetic housing 1 and dilutes the lubricating oil gradually, thereby such a case where the operation at the time of starting is done with the thrust slide bearing 36 being least lubricated, i.e. a dry operation, may happen.
  • a first invention relates to a scroll compressor in which a swivel scroll engaged with a stationary scroll fixed in a hermetic housing makes revolutionary swivel motions while it is prevented from rotating, and a thrust load working on said swivel scroll is supported by a thrust receiving surface of said hermetic housing via a thrust slide bearing contacting slidably to an outer surface of an end plate of said swivel scroll, wherein at least one of said outer surface of the end plate of the swivel scroll and the sliding surface of said thrust slide bearing contacting slidably thereto is applied to by a coating membrane made of a solid lubricating material.
  • a second invention relates to a scroll compressor in which a swivel scroll engaged with a stationary scroll fixed in a hermetic housing makes revolutionary swivel motions while it is prevented from rotating, and a thrust load working on said swivel scroll is supported by a thrust receiving surface of said hermetic housing via a thrust slide bearing contacting slidably to an outer surface of an end plate of said swivel scroll, wherein at least one of said outer surface of the end plate of the swivel scroll and said thrust receiving surface is applied to by a coating membrane made of a solid lubricating material.
  • solid lubricating material a solid lubricating material made on the basis of 4-fluoroethylene resin can be used.
  • the coating membrane of a solid lubricating material has an excellent anti-wearing and lubricating ability even under a condition where lubricating oil is not well supplied, unusual wearing of the sliding surfaces of the outer surface of the swivel scroll end plate and of the thrust slide bearing provided slidably thereon can be avoided even in a case where a dry operation or the like occurs at the time of re-starting of the compressor after a long time cessation.
  • FIG. 1 A first preferred embodiment of the present invention is shown in Fig. 1.
  • the sliding surface 36a of the thrust slide bearing 36 is applied to by a coating membrane 40 made of a solid lubricating material based on PTFE resin (4-fluoroethylene resin, a trade name: TEFLON) being coated and burnt.
  • PTFE resin 4-fluoroethylene resin, a trade name: TEFLON
  • the outer surface 15a of the end plate 15 of the swivel scroll 14 can be applied to by a like coating membrane 40
  • both the slide surface of the thrust slide bearing 36 and the outer surface 15a of the end plate 15 of the swivel scroll 14 can be applied to by a like coating membrane.
  • coating membrane 40 has an excellent anti-wearing and lubricating ability even under a condition where lubricating oil is not well supplied and lubricating oil film is not well formed, unusual wearing and seizure of the sliding surface 36a and the outer surface 15a can be avoided even when a dry operation or the like may happen for a some while (for example, some tens of seconds) at the time of restarting of the compressor after a long time cessation.
  • a solid lubricating material such of a solid lubricating material of a base material other than PTFE can be used, if such is excellent in anti-wearing and lubricating ability.
  • FIG. 2 A second preferred embodiment of the present invention is shown in Fig. 2.
  • the inner end surface of the front end plate 4, i.e. the thrust receiving surface 4a slides directly on the outer surface 15a of the end plate 15 of the swivel scroll 14.
  • the sliding surface 36a of the thrust slide bearing 36 is applied to by a coating membrane 40 made of a solid lubricating material based on PTFE resin (4-fluoroethylene resin, a trade name: TEFLON) being coated and burnt.
  • the outer surface 15a of the end plate 15 of the swivel scroll 14, as shown in Fig. 2(C), or both the thrust receiving surface 4a and the outer surface 15a of the end plate 15 of the swivel scroll 14, as shown in Fig. 2(D), can be applied to by a coating membrane 40.
  • this coating membrane 40 has an excellent anti-wearing and lubricating ability even under a condition where lubricating oil is not well supplied and a lubricating oil film is not well formed, a lubrication insufficiency on the sliding surfaces of the outer surface 15a of the end plate 15 and the thrust receiving surface 4a does not occur even in a dry operation or the like, and unusual wearing and seizure of these surfaces can be avoided.
  • both the front end plate 4 and the swivel scroll 14 being able to be made of an aluminium material and the thrust receiving surface 4a of the front end plate 4 and the outer surface 15a of the end plate 15 of the swivel scroll 14 being able to be slidably contacted each other, a good effect on a weight reduction of the compressor and on a cost reduction thereof can be obtained.
  • any one or both of the outer surface of the end plate of the swivel scroll and the sliding surface of the thrust slide bearing is/are applied to by a coating membrane made of a solid lubricating material, unusual wearing and seizure of the outer surface of the end plate of the swivel scroll and the sliding surface of the thrust slide bearing can be avoided even at the time of re-starting of the compressor after a long time cessation, and reliability of the compressor can be increased.
  • any one or both of the outer surface of the end plate of the scroll and the thrust receiving surface is/are applied to by a coating membrane, unusual wearing and seizure of the outer surface of the end plate of the swivel scroll and the thrust receiving surface can be avoided, likewise as in the first invention, at the time of re-starting of the compressor after a long time cessation, and both the swivel scroll and the hermetic housing being able to be made of aluminium and the thrust slide bearing being able to be omitted, a weight reduction of the compressor and a cost reduction thereof becomes possible.
EP95110171A 1994-08-19 1995-06-29 Scroll compressor Withdrawn EP0697522A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP21782494A JP3364016B2 (ja) 1994-08-19 1994-08-19 冷凍機用スクロール型圧縮機
JP217824/94 1994-08-19

Publications (1)

Publication Number Publication Date
EP0697522A1 true EP0697522A1 (en) 1996-02-21

Family

ID=16710325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95110171A Withdrawn EP0697522A1 (en) 1994-08-19 1995-06-29 Scroll compressor

Country Status (6)

Country Link
EP (1) EP0697522A1 (zh)
JP (1) JP3364016B2 (zh)
KR (1) KR0156882B1 (zh)
CN (1) CN1119704A (zh)
AU (1) AU2183095A (zh)
CA (1) CA2152454C (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7563510B2 (en) 2004-01-15 2009-07-21 Daikin Industries, Ltd. Fluid machinery
US7658600B2 (en) 2006-06-14 2010-02-09 Mitsubishi Heavy Industries, Ltd. Scroll compressor with thrustplate peeling prevention

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69604607T2 (de) * 1995-03-13 2000-03-23 Mitsubishi Heavy Ind Ltd Spiralverdrängermaschine
JP4972952B2 (ja) * 2006-02-17 2012-07-11 ダイキン工業株式会社 流体機械
JP2008286135A (ja) * 2007-05-18 2008-11-27 Denso Corp 圧縮機
JP5358018B2 (ja) * 2010-02-18 2013-12-04 東芝キヤリア株式会社 ロータリ圧縮機及び冷凍サイクル装置
JP5767959B2 (ja) 2011-12-22 2015-08-26 大豊工業株式会社 摺動部材
CN106271957A (zh) * 2012-10-05 2017-01-04 旭硝子株式会社 辊式输送设备、板状体的检查装置、及玻璃板的制造装置
CN103089622A (zh) * 2012-11-14 2013-05-08 柳州易舟汽车空调有限公司 涡旋压缩机
JP2014196680A (ja) * 2013-03-29 2014-10-16 株式会社日立製作所 冷媒圧縮機
JP6442171B2 (ja) * 2014-06-27 2018-12-19 三菱重工サーマルシステムズ株式会社 スクロール圧縮機
KR101783095B1 (ko) 2015-08-24 2017-10-24 서울특별시 배출수지 순차 제어 시스템 및 방법

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60104787A (ja) * 1983-11-09 1985-06-10 Hitachi Ltd スクロ−ル流体機械
JPS6140357A (ja) * 1984-07-31 1986-02-26 Otsuka Chem Co Ltd ポリフエニレンサルフアイド樹脂組成物
JPH02197506A (ja) * 1989-01-25 1990-08-06 Toshiba Corp スクロール翼の製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60104787A (ja) * 1983-11-09 1985-06-10 Hitachi Ltd スクロ−ル流体機械
JPS6140357A (ja) * 1984-07-31 1986-02-26 Otsuka Chem Co Ltd ポリフエニレンサルフアイド樹脂組成物
JPH02197506A (ja) * 1989-01-25 1990-08-06 Toshiba Corp スクロール翼の製造方法

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 199 (C - 359) 11 July 1986 (1986-07-11) *
PATENT ABSTRACTS OF JAPAN vol. 14, no. 486 (M - 1038) 23 October 1990 (1990-10-23) *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 256 (M - 421) 15 October 1985 (1985-10-15) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7563510B2 (en) 2004-01-15 2009-07-21 Daikin Industries, Ltd. Fluid machinery
US7658600B2 (en) 2006-06-14 2010-02-09 Mitsubishi Heavy Industries, Ltd. Scroll compressor with thrustplate peeling prevention
EP1867876B1 (en) * 2006-06-14 2018-08-29 Mitsubishi Heavy Industries, Ltd. Scroll compressor

Also Published As

Publication number Publication date
KR0156882B1 (ko) 1999-01-15
KR960008057A (ko) 1996-03-22
JPH0861256A (ja) 1996-03-08
AU2183095A (en) 1996-02-29
JP3364016B2 (ja) 2003-01-08
CN1119704A (zh) 1996-04-03
CA2152454A1 (en) 1996-02-20
CA2152454C (en) 1998-11-17

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