EP0855508A1 - Compresseur à spirales - Google Patents

Compresseur à spirales Download PDF

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Publication number
EP0855508A1
EP0855508A1 EP98100894A EP98100894A EP0855508A1 EP 0855508 A1 EP0855508 A1 EP 0855508A1 EP 98100894 A EP98100894 A EP 98100894A EP 98100894 A EP98100894 A EP 98100894A EP 0855508 A1 EP0855508 A1 EP 0855508A1
Authority
EP
European Patent Office
Prior art keywords
scroll
spiral
wall
mobile
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Withdrawn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
EP98100894A
Other languages
German (de)
English (en)
Inventor
Toshiyuki Kikuchi
Ko Tsukamoto
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.)
Sanden Corp
Original Assignee
Sanden 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 Sanden Corp filed Critical Sanden Corp
Publication of EP0855508A1 publication Critical patent/EP0855508A1/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Withdrawn legal-status Critical Current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
    • F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
    • 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
    • F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
    • F04C18/0269—Details concerning the involute wraps

Definitions

  • This invention relates to a scroll with improved durability for use in a scroll compressor.
  • the former conventional scrolls for use in scroll compressors provide the following structures for their spirals.
  • FIG. 1B shows an example in which the spiral 13a of the fixed scroll 13 is used in combination with the spiral 14a of the mobile scroll 14.
  • the structure shown in (3) above is more rational than those shown in (1) and (2), from the view point of optimization of strength distribution along the height of the wall.
  • the strength per scroll meat of the structure having the tapered wall shown in (3) is stronger than that of the structure having the straight wall shown in (1) and (2).
  • sealing member 21 is attached to edge surfaces of both spirals 13a and 14a of the fixed scroll 13 and the mobile scroll 14, respectively, and the sealing members 21 for both spirals adjust the axial clearance C and maintain sealing capacity.
  • liquid leakage due to internal compression from the clearance D in the direction of spiral walls between the wall 13a of the fixed scroll 13 and the wall 14a of the movable scroll 14 is greater as compared with that of the structures in (1) and (2).
  • the total volume of liquid leakage of the structure having the tapered wall shown in (3) is more than that of the structure having the straight wall shown in (1) and (2), when the liquid leakage due to the internal compression from the clearance D is taken into account.
  • a scroll compressor having a scroll equipping a spiral wall, the spiral wall having a tapered form at the central inner end portion thereof which does not affect compression or sealing capacity.
  • a scroll compressor having a scroll equipping a spiral wall, the spiral wall having a tapered form at the outer end portion thereof which does not affect compression or sealing capacity.
  • a scroll compressor having a scroll equipping a spiral wall, the spiral wall having a tapered form at the central inner end and the outer end portions thereof which do not affect compression or sealing capacity.
  • the scroll compressor has a compressor housing 10 comprising a front end plate 11 onto which a cup-shaped portion 12 is fixed.
  • the fixed scroll 13 comprises a side plate 13b, a spiral 13a formed on one side of the side plate 13b, and a base 13c placed on the side plate 13b opposite to the spiral 13a.
  • the base 13c is fixed onto an inner wall of a bottom end 12a of a cup-shaped portion 12, by means of a bolt 15 screwed into the cup-shaped portion 12 from the outer surface of the cup-shaped portion 12.
  • the gap between the outer surface of the side plate 13b of the fixed scroll 13 fixed inside the cup-shaped portion 12 and the inner surface of the cup-shaped portion 12 is sealed with a sealing material 23, thus partitioning an exhaust chamber 16 and an intake chamber 17 inside the cup-shaped portion 12.
  • the mobile scroll 14 comprises a side plate 14b and a spiral 14a formed on one side of it.
  • the spiral 14a and the spiral 13a of the fixed scroll 13 are arranged so as to exert compression strength on fluid.
  • a shaft 18 of the scroll compressor passes through the frond end plate 11 and is supported so as to allow free rotation.
  • the mobile scroll 14 is fixed onto the shaft 18 so that it revolves around a circular orbit as the shaft 18 rotates, without rotating on its own axis.
  • the mechanism to allow revolution of the mobile scroll 14 while suppressing the rotation on its own axis is not detailed here, since numerous examples of such a mechanism have already been proposed and published.
  • Fig. 5 shows the mobile scroll 14 according to the embodiment of this invention, which is an improved version of the conventional mobile scroll 14 shown in Figs. 3A and 3B.
  • a portion of the spiral 14a having an inner wall formed as an involute 14e and an outer wall as an involute 14h is identical in form with its counterpart in the conventional example shown in Fig. 3A, and functions as a sealing surface.
  • 14c is a base circle for the involute.
  • the portion of the spiral 14a of the mobile scroll 14 according to an embodiment of this invention formed by a curve 14f approaching an origin 14d of the involute for the inner surface and a curve 14i approaching an origin 14g of the involute for the outer surface is shaped differently from its counterpart in the conventional example shown in Fig. 3A, since the wall of the spiral 14a is tapered from its base toward the edge at this portion (i.e., the surface S indicated in Figs. 6A and 6B). Therefore, the strength of the wall of the spiral 14a is greater than that of the conventional example. Furthermore, neither compression nor sealing capacity is affected since the surface S formed by the curve 14f approaching the origin 14d of the involute for the inner surface and by the curve 14i approaching the origin 14g of the involute for the outer surface is not a sealing surface.
  • the outer end of the spiral 14a of the mobile scroll 14 according to the embodiment of this invention has an inner wall surface 14j, which is formed identically with that of the conventional example shown in Fig. 3B and is a sealing surface.
  • An outer wall surface 14k has an edge surface 14l formed identically with that of the conventional example, but the wall thickness increases toward the base. That is, the surface 14k is slightly tapered.
  • the outer wall surface 14k is not a sealing surface, so neither compression nor sealing capacity is affected. Therefore, working accuracy is not so strict as that required for a sealing surface. Casting surface is also acceptable for the outer wall surface 14k.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
EP98100894A 1997-01-22 1998-01-20 Compresseur à spirales Withdrawn EP0855508A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP962597A JPH10205468A (ja) 1997-01-22 1997-01-22 スクロール型コンプレッサ
JP9625/97 1997-01-22

Publications (1)

Publication Number Publication Date
EP0855508A1 true EP0855508A1 (fr) 1998-07-29

Family

ID=11725455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98100894A Withdrawn EP0855508A1 (fr) 1997-01-22 1998-01-20 Compresseur à spirales

Country Status (2)

Country Link
EP (1) EP0855508A1 (fr)
JP (1) JPH10205468A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1227245A3 (fr) * 2001-01-25 2003-07-09 Kabushiki Kaisha Toyota Jidoshokki Compresseur à spirales

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5166327B2 (ja) * 2009-03-13 2013-03-21 株式会社ケーヒン スクロール型圧縮機
JP7191246B2 (ja) * 2019-11-07 2022-12-16 三菱電機株式会社 スクロール圧縮機および冷凍サイクル装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5813184A (ja) 1981-07-16 1983-01-25 Sanden Corp スクロ−ル型圧縮機
JPS58172405A (ja) * 1982-04-05 1983-10-11 Hitachi Ltd スクロ−ル流体機械
EP0106288A1 (fr) * 1982-10-09 1984-04-25 Sanden Corporation Compresseur à volutes
JPH01130083A (ja) * 1987-11-16 1989-05-23 Sanyo Electric Co Ltd スクロール圧縮機
EP0392975A1 (fr) * 1989-04-08 1990-10-17 AGINFOR AG für industrielle Forschung Suralimentateur rotatif à spirales pour milieux compressibles
US5037279A (en) * 1988-09-19 1991-08-06 Hitachi, Ltd. Scroll fluid machine having wrap start portion with thick base and thin tip
JPH03225002A (ja) 1990-01-31 1991-10-04 Hitachi Ltd スクロール流体機械
US5059102A (en) * 1988-12-13 1991-10-22 Mitsubishi Denki K.K. Fluid scroll machine with peripherally attached counter weights and reduced thickness scroll
JPH04279785A (ja) 1991-03-06 1992-10-05 Toyota Autom Loom Works Ltd スクロール型圧縮機

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5813184A (ja) 1981-07-16 1983-01-25 Sanden Corp スクロ−ル型圧縮機
JPS58172405A (ja) * 1982-04-05 1983-10-11 Hitachi Ltd スクロ−ル流体機械
EP0106288A1 (fr) * 1982-10-09 1984-04-25 Sanden Corporation Compresseur à volutes
JPH01130083A (ja) * 1987-11-16 1989-05-23 Sanyo Electric Co Ltd スクロール圧縮機
US5037279A (en) * 1988-09-19 1991-08-06 Hitachi, Ltd. Scroll fluid machine having wrap start portion with thick base and thin tip
US5059102A (en) * 1988-12-13 1991-10-22 Mitsubishi Denki K.K. Fluid scroll machine with peripherally attached counter weights and reduced thickness scroll
EP0392975A1 (fr) * 1989-04-08 1990-10-17 AGINFOR AG für industrielle Forschung Suralimentateur rotatif à spirales pour milieux compressibles
JPH03225002A (ja) 1990-01-31 1991-10-04 Hitachi Ltd スクロール流体機械
JPH04279785A (ja) 1991-03-06 1992-10-05 Toyota Autom Loom Works Ltd スクロール型圧縮機

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 376 (M - 862)<3724> 21 August 1989 (1989-08-21) *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 9 (M - 268)<1446> 14 January 1984 (1984-01-14) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1227245A3 (fr) * 2001-01-25 2003-07-09 Kabushiki Kaisha Toyota Jidoshokki Compresseur à spirales
US6663365B2 (en) 2001-01-25 2003-12-16 Kabushiki Kaisha Toyota Jidoshokki Scroll type compressor

Also Published As

Publication number Publication date
JPH10205468A (ja) 1998-08-04

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