EP0318189B1 - Machine à volutes - Google Patents

Machine à volutes Download PDF

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Publication number
EP0318189B1
EP0318189B1 EP88310678A EP88310678A EP0318189B1 EP 0318189 B1 EP0318189 B1 EP 0318189B1 EP 88310678 A EP88310678 A EP 88310678A EP 88310678 A EP88310678 A EP 88310678A EP 0318189 B1 EP0318189 B1 EP 0318189B1
Authority
EP
European Patent Office
Prior art keywords
machine
wrap
relieved
point
flank
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.)
Expired - Lifetime
Application number
EP88310678A
Other languages
German (de)
English (en)
Other versions
EP0318189A3 (en
EP0318189A2 (fr
Inventor
James William Bush
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.)
Copeland Corp LLC
Original Assignee
Copeland Corp LLC
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 Copeland Corp LLC filed Critical Copeland Corp LLC
Publication of EP0318189A2 publication Critical patent/EP0318189A2/fr
Publication of EP0318189A3 publication Critical patent/EP0318189A3/en
Application granted granted Critical
Publication of EP0318189B1 publication Critical patent/EP0318189B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/02—Rotary-piston machines or engines 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/02—Rotary-piston machines or engines 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
    • F01C1/0207—Rotary-piston machines or engines 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
    • F01C1/0246—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
    • F04C2250/00—Geometry
    • F04C2250/10—Geometry of the inlet or outlet
    • F04C2250/102—Geometry of the inlet or outlet of the outlet
    • 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
    • F05B2250/00—Geometry
    • F05B2250/50—Inlet or outlet
    • F05B2250/502—Outlet

Definitions

  • This invention relates to scroll-type machines and more particularly to a scroll wrap configuration which reduces scroll-wrap noise and wear during operation of the machine.
  • Scroll machines generally comprise mated first and second scroll members each having an end plate on which is provided an upstanding spiral wrap interleaved with the wrap on the other scroll member; the wraps engaging each other at substantially line contacts so as to define traveling pockets of varying volume as one scroll member is caused to orbit relative to the other.
  • the machine may be a pump, compressor or expander.
  • Some scroll machines have been found to have undesirable noise in operation.
  • machining forces can cause the outer free end of one or both of the spiral wraps to be deflected slightly radially outwardly. After machining, the free end spring back to its original position thus presenting a slightly misaligned projection which can cause undesirable engagement between the respective scroll wraps during relative orbital movement.
  • tool deflection rather than wrap deflection, can occur which has the same end result. This engaging contact not only can result in a banging noise but can contribute to wear of the scroll assembly, and possible places additional loads on the crankshaft.
  • the primary object of this invention therefore resides in the provision of a scroll-type machine which overcomes the aforementioned noise and wear problems in a simple and inexpensive manner which does not result in any significant loss of efficiency.
  • EP-A-0 049 495 discloses a scroll type machine including the features of the prior art portion of claim 1.
  • This prior machine uses interfitting wraps, the active surfaces of which are raised to provide a thicker portion of the wrap near the centre thereof to provide improved sealing at the high pressure section of the machine.
  • the active surfaces preferably involute surfaces, are relieved at the outer end so as to reduce the noise and wear factor at this point with a steadily increasing ramp surface providing the connection from the relieved surface to the fully interfitting surface, wear and noise being kept to a minimum during use.
  • a further relieved surface is provided near the inner end of the wrap with the tapering ramp surfaces connecting to these relieved surfaces smoothing the transition from loading to unloading of the wrap ends during use of the machine and thus reducing noise.
  • An exemplary embodiment of a scroll compressor 10 comprises a scroll assembly 12 for compressing gases, a motor (not shown), a vertically disposed crankshaft including at one end thereof a crank pin 14 for drivingly interconnecting the scroll assembly to the motor via a drive bushing 15, a compressor body 16, and a shell 18 enclosing all of the above elements.
  • the scroll assembly 12 includes an orbiting scroll member 20 including a scroll end plate 22 and a scroll wrap 24 of desired flank profile (e.g. an involute of a circle) upstanding therefrom, and a non-orbiting scroll member 26 including a scroll end plate 28 and a scroll wrap 30 of similar flank profile upstanding therefrom, compressor body 16 supporting orbiting end plate 22 via the usual thrust surface 31.
  • the scroll assembly also includes a central discharge port 32 in non-orbiting end plate 28, a similarly shaped fluid transfer recess 33 in orbiting scroll end plate 22 and a suction inlet port area 34.
  • wraps 24 and 30 are disposed on diametrically opposed axes "x" and "y”, respectively, with the end of wrap 24 indicated at 36 and the end of wrap 30 at 38 (this wrap is continued outwardly and circumferentially to define a suction passage but this continued portion does not act as a wrap because it never engages the orbiting wrap).
  • the inner end of non-orbiting wrap 30 is indicated at 40 and the inner end of orbiting wrap 24 is indicated at 42.
  • orbiting wrap 24 has a portion of its radially outwardly facing surface adjacent its radially outer free end 36 cut away or relieved to define a modified offset surface 50 staring at point "A" at the free end of the wrap and extending approximately 180° to 190° to a point "B" (just past axis "y") and then a ramp surface 52 tapering at a constant rate radially outwardly (approximately 20°) from point "B" to a point "C” whereupon the wrap surface assumes its normal involute shape.
  • Phantom line “D” ( Figure 4) represents the outer flank surface of orbiting wrap 24 without being relieved in accordance with the present invention.
  • non-orbiting wrap 30 has a modified offset surface 60 extending approximately 8° to 9° between points "E” and “F” and a ramp surface 62 tapering at a constant rate radially outwardly approximately 20° to 21° from point "F” to a point "G", the latter representing the point where wrap 30 is back to its original profile and thickness.
  • Phantom line “H” ( Figure 3) represents the outer involute flank surface of nonorbiting wrap 30 without being relieved in accordance with this invention.
  • Modified surface 50 and 60 are easily formed by merely offsetting the wrap-machining cutter very slightly radially inwardly (e.g. 0.04 mm in a scroll having an orbiting wrap roughly 85 mm in overall outside diameter) to generate an offset surface parallel to the normal involute surface. Leakage is minimal because the offset is so small and because this is a relatively low pressure zone in the machine.
  • orbiting wrap 24 has a portion of its radially inwardly facing flank surface adjacent its radially inner free end 42 cut away or relieved to reduce wrap thickness.
  • the removed portion defines a modified surface 64 which tapers at constant rate radially outwardly from a point "J" to a point "K”.
  • non-orbiting wrap 30 has a portion of its radially inwardly facing flank surface adjacent its radially inner free end 40 cut away to reduce wrap thickness, the removed portion defining a modified surface 66 which tapers at constant rate radially outwardly from a point "L” to a point "M".
  • Points "J” and “L” are located at a point disposed on the wrap flank surfaces slightly radially outwardly of the point of normal separation of the wraps, preferably at the point that discharge port 32 and recess 33 are opened.
  • the configuration of the discharge port 32 (and corresponding recess 33) is disclosed in detail in assignee's application entitled Scroll Machine Center Port filed of even date in the name of Gary J. Anderson, the disclosure of which is expressly incorporated herein by reference.
  • Points "K” and “M” are located slightly radially inwardly of the normal separation point of wraps if they had true involute flank surfaces.
  • the resulting ramps which are shown in greatly exaggerated form, smooth the transition from loading to unloading of the wrap ends. Leakage is not a problem in the ramped area because the discharge port is already opened.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Rotary Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Claims (13)

  1. Machine de type à volutes, comprenant une première et une seconde pièces (20, 26) formant volutes, chacune desdites pièces formant volute comportant une plaque (22, 28) d'extrémité ayant sur elle une enveloppe (24, 30) en spirale en saillie vers l'extérieur, chacune desdites enveloppes ayant des surfaces de flanc actives et des parties (42, 40) d'extrémité radialement internes, et des orifices extérieur (34) et central (32) pour recevoir et décharger un fluide, lesdites enveloppes (24, 30) étant intercalées l'une avec l'autre de telle sorte que lesdites surfaces de flanc actives desdites enveloppes s'engagent l'une dans l'autre en une pluralité d'endroits espacés, de façon à définir une pluralité de chambres entre elles, de telle sorte que lorsque l'une des pièces formant volute (20) est amenée à décrire une orbite par rapport à ladite autre pièce formant volute (26), lesdites chambres sont amenées à se déplacer entre lesdits orifices, grâce à quoi le fluide reçu dans l'une desdites chambres à travers l'un desdits orifices est déchargé à travers l'autre desdits orifices; la machine comprenant de plus une première surface (50, 60) en dépouille dans la surface de flanc extérieure de l'une desdites enveloppes (24, 30), ladite surface en dépouille s'étendant circonférentiellement à l'intérieur le long de ladite surface de flanc à partir d'un point (A, E) qui est circonférentiellement à l'extérieur de l'extrémité extérieure (Y, X) de ladite surface de flanc sur l'autre desdites enveloppes, laquelle, excepté pour ladite surface en dépouille, serait une surface de flanc active en un point (B, F) circonférentiellement à l'intérieur au delà de ladite extrémité extérieure (Y, X), et une surface (52, 62) en rampe s'étendant radialement vers l'extérieur entre le point (B, F) à l'extrémité intérieure circonférentielle de ladite surface en dépouille et la surface de flanc active adjacente (en C, G) sur ladite enveloppe (24, 30); caractérisée en ce que le point (B, F) d'extrémité intérieure, à partir duquel la surface (50, 60) en dépouille s'étend, est adjacent à ladite extrémité extérieure (Y, X), et en ce que la surface (52, 62) en rampe est une surface conique, la surface en rampe s'étendant radialement vers l'extérieur selon un taux constant de variation.
  2. Machine selon la revendication 1, dans laquelle lesdites surfaces de flanc actives ont des profils complémentaires, ladite surface (50, 60) en dépouille étant décalée radialement à l'intérieur et parallèle audit profil (D, H).
  3. Machine selon la revendication 2, dans laquelle ledit profil est la développante d'une forme géométrique.
  4. Machine selon la revendication 3, dans laquelle ladite forme est un cercle.
  5. Machine selon la revendication 2, 3 ou 4, dans laquelle lesdites surfaces de flanc actives ont des profils identiques.
  6. Machine selon l'une quelconque des revendications précédentes, dans laquelle lesdites deux enveloppes (24, 30) présentent ladite surface (50, 60) en dépouille.
  7. Machine selon la revendication 6, dans laquelle l'une (60) desdites surfaces en dépouille présente une extension angulaire de 8 à 9 degrés, et l'autre (50) une extension angulaire de 180 à 190 degrés.
  8. Machine selon l'une quelconque des revendications précédentes, dans laquelle la rampe ou chaque rampe (52, 62) présente une extension angulaire approximativement de 20 à 21 degrés.
  9. Machine selon l'une quelconque des revendications précédentes, dans laquelle une seconde surface (64, 66) en dépouille est prévue sur l'enveloppe ou chaque enveloppe (24, 30), ladite seconde surface (64, 66) en dépouille étant disposée sur la surface de flanc intérieure de l'enveloppe adjacente à l'extrémité intérieure (42, 40) de cette dernière au point (K, M) de séparation théorique d'extrémité pour le profil de flanc actif de l'enveloppe.
  10. Machine selon la revendication 9, dans laquelle ladite seconde surface en dépouille présente une partie s'étendant radialement à l'extérieur de ladite surface d'enveloppe.
  11. Machine selon la revendication 10, dans laquelle ladite partie de surface s'étend radialement à l'extérieur selon un taux constant de variation.
  12. Machine selon l'une quelconque des revendications 1 à 8, dans laquelle une seconde surface (64, 66) en dépouille est prévue sur l'enveloppe ou chaque enveloppe (24, 30), ladite seconde surface en dépouille étant disposée sur la surface de flanc intérieure de l'enveloppe adjacente à l'extrémité intérieure (42, 40) de cette dernière au point (J, L) où la surface extérieure devient au début exposée à la pression du fluide dans ledit orifice central (32) pendant le fonctionnement de ladite machine.
  13. Machine selon l'une quelconque des revendications 9 à 11, dans laquelle ladite seconde surface (64, 66) en dépouille s'étend approximativement depuis le point (K, M) de séparation théorique d'extrémité pour le profil de flanc actif de l'enveloppe jusqu'au point (J, L) où la surface extérieure de cette dernière devient au début exposée à la pression du fluide dans ledit orifice central (32) pendant le fonctionnement de ladite machine.
EP88310678A 1987-11-23 1988-11-11 Machine à volutes Expired - Lifetime EP0318189B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12386687A 1987-11-23 1987-11-23
US123866 1987-11-23

Publications (3)

Publication Number Publication Date
EP0318189A2 EP0318189A2 (fr) 1989-05-31
EP0318189A3 EP0318189A3 (en) 1989-12-27
EP0318189B1 true EP0318189B1 (fr) 1993-03-31

Family

ID=22411371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88310678A Expired - Lifetime EP0318189B1 (fr) 1987-11-23 1988-11-11 Machine à volutes

Country Status (10)

Country Link
EP (1) EP0318189B1 (fr)
JP (1) JPH0656081B2 (fr)
KR (1) KR970001456B1 (fr)
CN (1) CN1012200B (fr)
AU (1) AU611970B2 (fr)
BR (1) BR8806152A (fr)
DE (1) DE3879887T2 (fr)
ES (1) ES2034944T3 (fr)
IN (1) IN170806B (fr)
MX (1) MX169843B (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5056336A (en) * 1989-03-06 1991-10-15 American Standard Inc. Scroll apparatus with modified scroll profile
US5395222A (en) * 1989-11-02 1995-03-07 Matsushita Electric Industrial Co., Ltd. Scroll compressor having recesses on the scroll wraps
JP2723635B2 (ja) * 1989-11-02 1998-03-09 松下電器産業株式会社 スクロール圧縮機
US5318424A (en) * 1992-12-07 1994-06-07 Carrier Corporation Minimum diameter scroll component
JPH09100272A (ja) * 1995-08-02 1997-04-15 Nippon Bayeragrochem Kk 除草性チオカルバモイルテトラゾリノン類
JP3684293B2 (ja) * 1997-09-16 2005-08-17 株式会社豊田自動織機 スクロール型圧縮機
US6257851B1 (en) 1997-09-25 2001-07-10 Scroll Technologies Generalized minimum diameter scroll component
JP3753886B2 (ja) * 1999-03-30 2006-03-08 三菱電機株式会社 高精度加工装置
US6592430B1 (en) 2000-09-29 2003-07-15 Mitsubishi Denki Kabushiki Kaisha High-precision machining system
CN101456532B (zh) * 2005-07-04 2012-06-20 俞度立 微涡卷叶片及微涡卷基板的制造方法
JP2011038480A (ja) * 2009-08-12 2011-02-24 Sanden Corp スクロール型流体機械
JP5888897B2 (ja) * 2011-08-05 2016-03-22 三菱重工業株式会社 スクロール部材及びスクロール型流体機械
JP6267441B2 (ja) * 2013-05-28 2018-01-24 株式会社ヴァレオジャパン スクロール型圧縮機
CN104128645B (zh) * 2013-11-13 2016-11-02 柳州易舟汽车空调有限公司 动涡旋盘的加工方法
CN104121196A (zh) * 2013-11-13 2014-10-29 柳州易舟汽车空调有限公司 涡旋压缩机动盘
JP6325035B2 (ja) * 2016-08-19 2018-05-16 三菱重工サーマルシステムズ株式会社 スクロール流体機械

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR93048E (fr) * 1966-10-06 1969-01-31 Vulliez Paul Appareil columétrique tel que pompe ou analogue a cycle de translation circulaire.
US3874827A (en) * 1973-10-23 1975-04-01 Niels O Young Positive displacement scroll apparatus with axially radially compliant scroll member
JPS586075B2 (ja) * 1980-10-03 1983-02-02 サンデン株式会社 スクロ−ル型圧縮機
JPS57195801A (en) * 1981-05-27 1982-12-01 Sanden Corp Fluidic device of volute type
JPS58172405A (ja) * 1982-04-05 1983-10-11 Hitachi Ltd スクロ−ル流体機械
US4472120A (en) * 1982-07-15 1984-09-18 Arthur D. Little, Inc. Scroll type fluid displacement apparatus
JPS59142482U (ja) * 1983-03-15 1984-09-22 サンデン株式会社 スクロ−ル型流体装置
JPS60252187A (ja) * 1984-05-28 1985-12-12 Mitsubishi Heavy Ind Ltd 回転式流体機械
JPS61265376A (ja) * 1985-05-16 1986-11-25 Mitsubishi Electric Corp スクロ−ル圧縮機

Also Published As

Publication number Publication date
KR890008478A (ko) 1989-07-10
CN1012200B (zh) 1991-03-27
JPH0656081B2 (ja) 1994-07-27
AU2574388A (en) 1989-05-25
MX169843B (es) 1993-07-28
AU611970B2 (en) 1991-06-27
EP0318189A3 (en) 1989-12-27
KR970001456B1 (ko) 1997-02-06
EP0318189A2 (fr) 1989-05-31
IN170806B (fr) 1992-05-23
DE3879887D1 (de) 1993-05-06
DE3879887T2 (de) 1993-07-08
ES2034944T3 (es) 1993-10-01
BR8806152A (pt) 1989-08-15
ES2034944T1 (es) 1993-04-16
JPH01163401A (ja) 1989-06-27
CN1034413A (zh) 1989-08-02

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