EP0831234A2 - Spiralmaschine - Google Patents

Spiralmaschine Download PDF

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Publication number
EP0831234A2
EP0831234A2 EP97402151A EP97402151A EP0831234A2 EP 0831234 A2 EP0831234 A2 EP 0831234A2 EP 97402151 A EP97402151 A EP 97402151A EP 97402151 A EP97402151 A EP 97402151A EP 0831234 A2 EP0831234 A2 EP 0831234A2
Authority
EP
European Patent Office
Prior art keywords
scroll
orbiting scroll
tip
driving shaft
seals
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Withdrawn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
EP97402151A
Other languages
English (en)
French (fr)
Other versions
EP0831234A3 (de
Inventor
Mitsuo Nakamura
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.)
Asuka Japan Co Ltd
Original Assignee
Asuka Japan Co 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 Asuka Japan Co Ltd filed Critical Asuka Japan Co Ltd
Publication of EP0831234A2 publication Critical patent/EP0831234A2/de
Publication of EP0831234A3 publication Critical patent/EP0831234A3/de
Withdrawn legal-status Critical Current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
    • F04C18/0223—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 with symmetrical double wraps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/02—Arrangements of bearings

Definitions

  • the present invention relates to a fixation of a driving shaft of an orbiting scroll used in a scroll fluid machine.
  • Figs.land 4 show a conventional twin-type scroll fluid machine.
  • an eccentric shaft portion la is rotatably fit into a boss portion of an orbiting scroll 2 and stationary scrolls 3 and 4 are assembled with a rotary shaft portion 1b so as to make stationary and orbiting spiral wraps 5 and 5a constructed to lap each other. Tips of the spiral wraps 5,5,5a, and 5a are provided with tip-seals 6 which are slidingly contacted to corresponding end plates of the scrolls 2,3, and 4, thereby performing orbital movement with a sealing at the tip-seals 6.
  • the orbiting scroll 2 is, however, movable on the eccentric shaft portion 1a of a driving shaft 1 in an axial direction since bearings of the orbiting scroll 2 are all needle bearings 10. Further, the stationary scrolls 3 and 4 are not fixed to the driving shaft 1 in the axial direction, then they are movable within clearances 7 at the tips of the spiral wraps 5,5,5a, and 5a since a ball bearing 13b allows slight slips in the axial direction as shown with "X" in Fig.5. Therefore, it is difficult to set and keep the orbiting scroll 2 at a position where the above two kinds of clearances 7 are equal.
  • the orbiting scroll 2 is likely to be offset more or less to either side of the eccentric shaft portion la in the axial direction due to the above reason, an assembling skill, or a machining accuracy of related parts.
  • An object of the present invention is to provide a scroll fluid machine with a structure of fixing an orbiting scroll to the center of an eccentric shaft portion of a driving shaft in an axial direction so as to eliminate the above-mentioned defects.
  • the present invention adopts a structure, wherein a stationary scroll is fixed to a rotary shaft portion of a driving shaft by means of an axially rigid bearing and an orbiting scroll is fixed to an eccentric shaft portion of the driving shaft by means of another axially rigid bearing for preventing the stationary and orbiting scrolls from moving on the driving shaft in the axial direction.
  • This structure ensures to keep uniform clearances at the tips of spiral wraps and to make a pressure on tip-seals uniform, thereby ensuring smoother orbital movement with a condition for achieving a sufficient effect on a compression process.
  • Fig.2 shows an embodiment of a twin-type scroll fluid machine in accordance with the present invention.
  • an eccentric shaft portion 1a is rotatably fit into a boss portion of an orbiting scroll 2 by means of a needle bearing 10 and a double row angular ball bearing 8.
  • Stationary scrolls 3 and 4 are assembled with a rotary shaft portion 1b by means of a double row angular ball bearing 13 and a snap ring 14 in a bearing housing portion of the stationary scroll 3 so as to fixedly construct the stationary scrolls 3 and 4 against a driving shaft 1 in the axial direction.
  • the orbiting scroll 2 is assembled with the eccentric shaft portion la fixedly in the axial direction, with the axial direction's center of the boss portion of the orbiting scroll 2 being positioned at the axial direction's center of the eccentric shaft portion 1a, by means of the angular ball bearings 8, snap rings 9 and 9', and a bearing collar 15 all being fit in the boss portion. All clearances 7 between the tips of spiral wraps 5,5,5a, and 5a and corresponding end plates are equally kept.
  • the orbiting scroll 2 relatively revolves around the rotary center of the driving shaft 1 due to rotation of the driving shaft 1 around the rotary center.
  • the stationary scrolls 3 and 4 are fixed against the driving shaft 1 in the axial direction by the angular ball bearings 13 and the snap ring 14, and the orbiting scroll 2 is fixed against the eccentric shaft portion 1a in the axial direction by the angular ball bearings 8 and the snap rings 9 and 9', having the clearances 7 with the stationary scrolls 3 and 4 at the both sides.
  • the orbiting scroll 2 is able to rotate constantly without moving in the axial direction, that is, without change of the clearances 7, thereby ensuring a normal operation of the fluid machine by maintaining a set pressure on any tip-seal 6 provided at the tips of the orbiting spiral wraps 5 and 5 and of the stationary spiral wraps 5a and 5a.
  • Fig.3 shows another embodiment of a scroll fluid machine, i.e. a single-type scroll fluid machine having an eccentric shaft portion 1a covering whole a driving shaft 1 with the same width as an orbiting scroll 5, in accordance with the present invention.
  • This embodiment has the same features as the previous one.
  • the pressure on the tip-seals at the tips of the spiral wraps are equalized when the orbiting scroll orbits in an orbiting space formed in the stationary scroll, since the orbiting scroll is fixed so as to make the clearances at the tips of the spiral wraps uniform.
  • the aforementioned problems such as rapid wear or short life of tip-seals due to too high pressure on the tip-seals and leakage from clearances or an insufficiency of pressure due to too low pressure on tip-seals are eliminated.
  • orbital movement is stabilized due to fixation of the orbiting scroll in an axial direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
EP97402151A 1996-09-20 1997-09-17 Spiralmaschine Withdrawn EP0831234A3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP285831/96 1996-09-20
JP28583196A JPH10103260A (ja) 1996-09-20 1996-09-20 スクロール流体機械
JP28583196 1996-09-20

Publications (2)

Publication Number Publication Date
EP0831234A2 true EP0831234A2 (de) 1998-03-25
EP0831234A3 EP0831234A3 (de) 1999-06-23

Family

ID=17696652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97402151A Withdrawn EP0831234A3 (de) 1996-09-20 1997-09-17 Spiralmaschine

Country Status (4)

Country Link
EP (1) EP0831234A3 (de)
JP (1) JPH10103260A (de)
KR (1) KR19980024687A (de)
ID (1) ID19275A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1148246A2 (de) * 2000-04-19 2001-10-24 Unipulse Corporation Spiralverdichter und Spiraldrucktransformatoranlage
GB2515370A (en) * 2013-03-29 2014-12-24 Agilent Technologies Inc Scroll pump having separable orbiting plate scroll and method of replacing tip seal
GB2515855A (en) * 2013-04-05 2015-01-07 Agilent Technologies Inc Angular synchronization of stationary and orbiting plate scroll blades in a scroll pump using a metallic bellows
RU2655092C1 (ru) * 2017-03-20 2018-05-23 Общество с ограниченной ответственностью "СТЭК" Спиральный компрессор

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102060472B1 (ko) * 2018-04-26 2019-12-30 엘지전자 주식회사 스크롤 압축기
CN110159528B (zh) * 2019-05-23 2020-11-17 浙江大学 一种双侧双槽并联式无油涡旋空压机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4832586A (en) * 1987-06-26 1989-05-23 Volkswagen Ag Drive assembly with different eccentricities
JPH0237192A (ja) * 1988-05-12 1990-02-07 Sanden Corp スクロール型流体装置
JPH0754784A (ja) * 1993-08-09 1995-02-28 Hitachi Ltd 軸貫通スクロール圧縮機
JP3134656B2 (ja) * 1994-03-18 2001-02-13 株式会社日立製作所 スクロール圧縮機及びその組立て方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1148246A2 (de) * 2000-04-19 2001-10-24 Unipulse Corporation Spiralverdichter und Spiraldrucktransformatoranlage
EP1148246A3 (de) * 2000-04-19 2002-11-20 Unipulse Corporation Spiralverdichter und Spiraldrucktransformatoranlage
GB2515370A (en) * 2013-03-29 2014-12-24 Agilent Technologies Inc Scroll pump having separable orbiting plate scroll and method of replacing tip seal
US8961160B2 (en) 2013-03-29 2015-02-24 Agilent Technologies, Inc. Scroll pump having separable orbiting plate scroll and method of replacing tip seal
GB2515370B (en) * 2013-03-29 2020-01-01 Agilent Technologies Inc Scroll pump having separable orbiting plate scroll and method of replacing tip seal
GB2515855A (en) * 2013-04-05 2015-01-07 Agilent Technologies Inc Angular synchronization of stationary and orbiting plate scroll blades in a scroll pump using a metallic bellows
GB2515855B (en) * 2013-04-05 2020-02-26 Agilent Technologies Inc Angular synchronization of stationary and orbiting plate scroll blades in a scroll pump using a metallic bellows
RU2655092C1 (ru) * 2017-03-20 2018-05-23 Общество с ограниченной ответственностью "СТЭК" Спиральный компрессор

Also Published As

Publication number Publication date
KR19980024687A (ko) 1998-07-06
EP0831234A3 (de) 1999-06-23
JPH10103260A (ja) 1998-04-21
ID19275A (id) 1998-06-28

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