EP0471425A1 - Machine à volutes pour fluides - Google Patents

Machine à volutes pour fluides Download PDF

Info

Publication number
EP0471425A1
EP0471425A1 EP91250154A EP91250154A EP0471425A1 EP 0471425 A1 EP0471425 A1 EP 0471425A1 EP 91250154 A EP91250154 A EP 91250154A EP 91250154 A EP91250154 A EP 91250154A EP 0471425 A1 EP0471425 A1 EP 0471425A1
Authority
EP
European Patent Office
Prior art keywords
pressure chamber
low pressure
scroll
end plate
housing
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Withdrawn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
EP91250154A
Other languages
German (de)
English (en)
Inventor
Toshiyuki c/o MITSUBISHI JUKOGYO K.K. Shikanai
Takayuki C/O Mitsubishi Jukogyo K.K. Iio
Takahisa C/O Mitsubishi Jukogyo K.K. Hirano
Yoshiharu C/O Churyo Engineering K.K. Morita
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.)
Churyo Engineering Co Ltd
Mitsubishi Heavy Industries Ltd
Original Assignee
Churyo Engineering Co Ltd
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 Churyo Engineering Co Ltd, Mitsubishi Heavy Industries Ltd filed Critical Churyo Engineering Co Ltd
Publication of EP0471425A1 publication Critical patent/EP0471425A1/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Withdrawn legal-status Critical Current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
    • 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
    • F04C2230/60—Assembly methods
    • 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
    • F05B2230/60—Assembly methods

Definitions

  • the present invention relates to a scroll type fluid machinery used as a compressor, an expansion machinery and the like.
  • Fig. 3 shows an example of a conventional scroll type compressor of this sort.
  • a housing 1 consists of a cup-shaped main body 2, a front end plate 4 which is clamped to the main body 2 with bolts not shown, and a front cover 6 which is clamped to the front end plate 4 with a bolt 5.
  • a rotary shaft 7 penetrates through the front cover 6 and is supported rotatably by the housing 1 through a bearing 8 provided between the front cover 6 and the rotary shaft 7 and a bearing 9 provided between a boss 7a thereof and the front end plate 4.
  • a stationary scroll 10 and a revolving scroll 14 are housed inside the housing 1.
  • the stationary scroll 10 is provided with an end plate 11 and a spiral wrap 12 set up on the inner surface thereof and the outer peripheral surface of the end plate 11 is brought into close contact with the inner peripheral surface of the cup-shaped main body 2 and clamped with a bolt 13 thereto.
  • a high pressure chamber 31 is delimited on the outside of the end plate 11, and a low pressure chamber 32 is delimited on the inside thereof.
  • the revolving scroll 14 is provided with an end plate 15 and a spiral wrap 16 set up on the inside surface thereof, and the spiral wrap 16 has substantially the same configuration as the spiral wrap 12.
  • the revolving scroll 14 and the stationary scroll 10 are eccentric from each other by the radius of revolution, and are engaged with each other while shifting by an angle of 180° mutually as shown in the figure.
  • a chip seal 17 disposed on an end surface of the spiral wrap 12 is brought into close contact with the inner surface of the end plate 15
  • a chip seal 18 embedded in the end surface of the spiral wrap 16 is brought into close contact with the inner surface of the end plate 11, and side surfaces of the spiral wraps 12 and 16 are brought into linear contact with each other at a plurality of locations.
  • a plurality of closed small chambers 19a and 19b which form an approximate point symmetry with respect to the center of the spiral are delimited.
  • a bushing 21 is fitted rotatably in a cylindrical boss 20 projected at the central part of the outer surface of the end plate 15 of the revolving scroll 14 through a rotary bearing 23, and an eccentric pin 25 projected at an inner end of the rotary shaft 7 is fitted rotatably in an eccentric hole 24 bored in the bushing 21. Further, a balance weight 27 is fixed to this bushing 21.
  • a mechanism 26 for checking rotation on its axis which also serves as a thrust bearing is arranged between the outer peripheral edge of the outer surface of the end plate 15 and the inner surface of the front end plate 4.
  • a sub-balance weight 28 is clamped on the boss 7a of the rotary shaft 7.
  • the revolving scroll 14 is driven through the eccentric pin 25, the bushing 21, the rotary bearing 23 and the boss 20, and the revolving scroll 14 revolves in a solar motion while being checked to rotate on its axis by means of the mechanism 26 for checking rotation on its axis.
  • a scroll type fluid machinery in which a stationary scroll and a revolving scroll provided with spiral wraps set up on end plates, respectively, are engaged with each other and housed in a housing, the stationary scroll is fixed to the housing, and the revolving scroll is made to revolve in a solar motion while checking the rotation on its axis by means of a mechanism for checking rotation on its axis, characterized in that a low pressure chamber forming unit which partitions the inside of the housing into a low pressure chamber and a high pressure chamber of above-mentioned machinery is disposed on the outside of the end plate of the stationary scroll, and a low pressure chamber which communicates with the low pressure chamber is formed between the end plate of the stationary scroll and the high pressure chamber by means of this low pressure chamber forming unit.
  • the low pressure in the low pressure chamber is applied to the outer surface of the end plate of the stationary scroll with the construction described above. Therefore, deformation of the end plate is prevented or reduced.
  • the low pressure in the low pressure chamber is applied to the outer surface of the end plate of the stationary scroll, thus preventing or reducing deformation of the end plate.
  • Fig. 1 shows a first embodiment of the present invention.
  • a low pressure chamber forming unit 33 is disposed on the outside of an end plate 11 of a stationary scroll 10, and is clamped to a cup-shaped main body 2 together with the stationary scroll 10 by means of a bolt 13.
  • the outer peripheral surface of the unit 33 is installed on an inner peripheral surface of the cup-shaped main body 2 through a seal ring 35 so as to form an airtight structure, so that the inside of a housing 1 is partitioned into a low pressure chamber 32 and a high pressure chamber 31 by means of the unit 33.
  • a low pressure chamber 34 is delimited between the end plate 11 of the stationary scroll 10 and the high pressure chamber 31 by means of the unit 33, and the low pressure chamber 34 communicates with the low pressure chamber 32 through a through hole 36.
  • a hole 37 which communicates with a discharge port 29 is bored at the central part of the unit 33, and a tip of a cylindrical boss 38 projected toward the end plate 11 around the hole 37 is attached onto the outer surface of the end plate 11 through a seal ring 39 so as to form an airtight structure. Further, a discharge valve 30 opens and closes the outlet of the hole 37.
  • a low pressure gas suctioned into the low pressure chamber 32 enters into the low pressure chamber 34 through the through hole 36. Accordingly, the low pressure gas in the low pressure chamber 34 acts on the outer surface of the end plate 11 of the stationary scroll 10, and the pressing force applied to the end plate 11 becomes smaller substantially as compared with a conventional compressor, thereby to prevent or reduce deformation of the end plate 11.
  • Fig. 2 shows a second embodiment of the present invention, wherein the hole 37 is enlarged, the discharge valve 30 is disposed at the bottom of the hole 37, and the outlet of the discharge port 29 is opened and closed by means of the discharge valve 30.
  • the top clearance volume is reduced and performance of a compressor may be improved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Compressor (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP91250154A 1990-08-16 1991-06-11 Machine à volutes pour fluides Withdrawn EP0471425A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP216169/90 1990-08-16
JP2216169A JPH04101001A (ja) 1990-08-16 1990-08-16 スクロール型流体機械

Publications (1)

Publication Number Publication Date
EP0471425A1 true EP0471425A1 (fr) 1992-02-19

Family

ID=16684368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91250154A Withdrawn EP0471425A1 (fr) 1990-08-16 1991-06-11 Machine à volutes pour fluides

Country Status (6)

Country Link
EP (1) EP0471425A1 (fr)
JP (1) JPH04101001A (fr)
KR (1) KR920004729A (fr)
CN (1) CN1021590C (fr)
AU (1) AU643273B2 (fr)
CA (1) CA2042204C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1555437A1 (fr) * 2004-01-14 2005-07-20 Kabushiki Kaisha Toyota Jidoshokki Compresseur

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5342185A (en) * 1993-01-22 1994-08-30 Copeland Corporation Muffler plate for scroll machine
JP2000352389A (ja) * 1999-06-08 2000-12-19 Mitsubishi Heavy Ind Ltd スクロール圧縮機
KR100427398B1 (ko) * 2000-12-28 2004-04-17 라필찬 고, 저압부가 장착된 스크롤 유체기계
KR100398472B1 (ko) * 2000-12-28 2003-09-19 라필찬 고, 저압부가 일체로 장착된 스크롤 유체기계
KR100427399B1 (ko) * 2000-12-28 2004-04-17 라필찬 고, 저압부가 일체로 장착된 스크롤 유체기계

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2132276A (en) * 1982-12-23 1984-07-04 Copeland Corp Scroll-type rotary fluid-machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5819875B2 (ja) * 1980-03-18 1983-04-20 サンデン株式会社 スクロ−ル型圧縮機

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2132276A (en) * 1982-12-23 1984-07-04 Copeland Corp Scroll-type rotary fluid-machine

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 196 (M-497)(2252) 10 July 1986 & JP-A-61 040 473 ( TOSHIBA CORP. ) *
PATENT ABSTRACTS OF JAPAN vol. 10, no. 277 (M-519)(2333) 19 September 1986 & JP-A-61 098 987 ( HITACHI LTD ) *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 258 (M-838)(3606) 15 June 1989 & JP-A-1 063 678 ( TOSHIBA CORP. ) *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 67 (M-798)(3415) 15 February 1989 & JP-A-63 268 992 ( TOSHIBA CORP. ) 7 November 1988 *
PATENT ABSTRACTS OF JAPAN vol. 14, no. 247 (M-978)(4190) 25 May 1990 & JP-A-2 067 485 ( TOSHIBA CORP. ) 7 March 1990 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1555437A1 (fr) * 2004-01-14 2005-07-20 Kabushiki Kaisha Toyota Jidoshokki Compresseur

Also Published As

Publication number Publication date
CA2042204C (fr) 1995-05-09
CN1021590C (zh) 1993-07-14
JPH04101001A (ja) 1992-04-02
CN1059017A (zh) 1992-02-26
AU643273B2 (en) 1993-11-11
CA2042204A1 (fr) 1992-02-17
KR920004729A (ko) 1992-03-28
AU7645391A (en) 1992-02-20

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