EP1983196B1 - Compresseur à spirales à structure bloquante pour éviter un mouvement de la chemise d'arbre - Google Patents

Compresseur à spirales à structure bloquante pour éviter un mouvement de la chemise d'arbre Download PDF

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Publication number
EP1983196B1
EP1983196B1 EP20070251632 EP07251632A EP1983196B1 EP 1983196 B1 EP1983196 B1 EP 1983196B1 EP 20070251632 EP20070251632 EP 20070251632 EP 07251632 A EP07251632 A EP 07251632A EP 1983196 B1 EP1983196 B1 EP 1983196B1
Authority
EP
European Patent Office
Prior art keywords
slider block
eccentric pin
stop
scroll compressor
set forth
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 - Fee Related
Application number
EP20070251632
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German (de)
English (en)
Other versions
EP1983196A1 (fr
Inventor
Zili Sun
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.)
Danfoss Scroll Technologies LLC
Original Assignee
Scroll Technologies 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 Scroll Technologies LLC filed Critical Scroll Technologies LLC
Priority to EP20070251632 priority Critical patent/EP1983196B1/fr
Publication of EP1983196A1 publication Critical patent/EP1983196A1/fr
Application granted granted Critical
Publication of EP1983196B1 publication Critical patent/EP1983196B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C29/0057—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions for eccentric movement
    • 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

Definitions

  • This application relates to a scroll compressor having a slider block which is driven by an eccentric pin from a drive shaft, and wherein there is a stop structure on the eccentric pin to prevent the slider block from moving upwardly beyond the eccentric pin and contacting a rear surface of the orbiting scroll.
  • a first scroll member has a base and a generally spiral wrap extending from its base.
  • the second scroll member has a base and a generally spiral wrap extending from its base.
  • the generally spiral wraps interfit to define compression chambers.
  • One of the two scroll members is caused to orbit relative to the other, and as it orbits the size of the compression chambers decreases and an entrapped fluid is compressed.
  • the drive mechanism for causing the scroll member to orbit includes a drive shaft driven to rotate, and having an eccentric pin extending upwardly into a slider block.
  • the slider block is received within a rearwardly extending boss in the orbiting scroll.
  • the eccentric pin drives the orbiting scroll through the slider block.
  • prior art document EP1544469A1 discloses an eccentric coupling device in a radial compliance scroll compressor including: a crank pin eccentrically arranged provided at an upper end of a crankshaft included in the scroll compressor, and provided with a vertically-extending cut surface at one side thereof; an eccentric bush provided with a crank pin hole adapted to receive the crank pin, and a stopper hole provided at the eccentric bush at one side of the crank pin hole such that the stopper hole overlaps with the crank pin hole; a stopper fitted in the stopper hole such that the stopper is radially protruded into the crank pin hole toward the cut surface to selectively come into contact with the cut surface in accordance with a rotation of the bush; and a spring wire adapted to elastically support the eccentric bush, while connecting the stopper and the crank pin, thereby preventing an elevation of the eccentric bush.
  • JP09329091 discloses a scroll type fluid device having a thrust supporting part provided on a mounting structure and a slide bush supported in an axial direction so as to make the flange part of a drive shaft unnecessary and the drive shaft can be inserted in either direction through the bearing hole of the mounting structure.
  • US5439360 discloses a self-adjusting crankshaft drive comprising an eccentric drive pin located on the overhung end of a crankshaft.
  • the drive pin is located within a bore in a slider block which is located within the hub of an orbiting scroll.
  • Either the drive pin or the slider block bore has an axially curved surface and the other has a corresponding flat surface parallel to the axis of the crankshaft. Contact between the axially curved and corresponding flat surface remains at essentially the same axial location even though the drive pin is deflected under loading.
  • a stop structure is provided on the eccentric pin.
  • This stop structure prevents the slider block from moving upwardly and contacting the orbiting scroll.
  • this stop structure is a slightly enlarged upper portion of the eccentric pin which fits into a notch in the slider block. While the two may be out of contact in most cases, should the slider block begin to migrate vertically upwardly, it will contact the stop, and the stop will prevent further movement.
  • the outside dimension of the eccentric pin at the stop is less than an inside dimension of a bore through the entirety of the slider block. This will facilitate assembly of the slider block onto the slider pin.
  • a scroll compressor 20 is illustrated in Figure 1A , and is as known in the art.
  • a non-orbiting scroll 22 has a spiral wrap 23 extending from a base.
  • An orbiting scroll 24 has a spiral wrap 25 extending from its base 27.
  • the orbiting scroll 24 further has a boss 26 extending away from its base 27 in an opposed direction to the wrap 25.
  • Refrigerant is compressed in the compression chambers defined between the wraps 23 and 25 and delivered to a discharge port 28. Refrigerant enters the compressor housing through a section port 30.
  • the motor 32 drives a shaft 34 to rotate.
  • the shaft 34 includes an eccentric pin 36 which is received within a slider block 38.
  • the slider block sits within the boss 26, and between the boss and the eccentric pin 36.
  • An anti-rotation coupling 37 ensures that the orbiting scroll will not rotate, but instead orbits.
  • the slider block 38 typically has an opening for receiving the eccentric pin 36 that is much larger than the pin 36.
  • a flat surface 54 on the eccentric pin 36 engages a flat surface 52 in the bore in the slider block 38.
  • Figure 1C is a view generally perpendicular to the Figure 1B view. As shown, the "flat" surface 54 is not truly flat, but actually has a slight barrel shape. With this prior art, there is sometimes a problem in that the slider block 38 has migrated vertically upwardly, and contacted the rear surface 60 of the base 27. This is undesirable.
  • the driveshaft 34 is provided with an eccentric pin 136 that is received within a slider block 138.
  • the slider block 138 is provided with a notch 142 at a vertically uppermost surface.
  • the eccentric pin 36 is provided with a stop 140 at its vertically uppermost surface.
  • the outer dimension of the eccentric pin at the stop 140 is shown at B. This dimension is less than the dimension of the bore within the slider block 138 shown at A. In this manner, the slider block can be simply dropped onto the eccentric pin.
  • the stop will move over and be above the notch 142.
  • the notch 142 extends for a greater length than does stop 140. This is to remove any alignment problems as the flat surfaces come into engagement.
  • the present invention provides a simple and effective method of preventing a slider block from contacting the rear of a base of an orbiting scroll. While a preferred embodiment of this invention has been disclosed, a worker of ordinary skill in the art would recognize that certain modifications would come within the scope of this invention. For that reason, the following claims should be studies to determine the true scope and content of this invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Claims (12)

  1. Compresseur à spirales, comprenant :
    un premier élément de spirale, comportant une base et un enroulement généralement en spirale s'étendant à partir de ladite base ;
    un deuxième élément de spirale, comportant une base (27) et un enroulement généralement en spirale s'étendant à partir de sa base (27), lesdits enroulements en spirale desdits premier et deuxième éléments de spirale étant mutuellement ajustés pour définir des chambres de compression ;
    un arbre d'entraînement (34) et un moteur pour faire tourner ledit arbre d'entraînement (34), ledit arbre d'entraînement (34) comportant une goupille excentrique (136), s'étendant à partir d'une extrémité dudit arbre d'entraînement (34) ;
    ledit deuxième élément de spirale étant entraîné dans une rotation en orbite par ladite goupille excentrique (136), et ledit deuxième élément de spirale comportant un bossage (26), s'étendant à partir de ladite base (27), dans une direction opposée à celle dudit enroulement en spirale, ledit bossage (26) englobant une ouverture recevant un bloc à coulisse (138) et ladite goupille excentrique (136) étant agencée avec ledit bloc à coulisse (138) entre ladite goupille excentrique (136) et ledit bossage (26), ledit bossage (26) comportant une surface supérieure définissant une surface arrière (60) de ladite base (27) dudit deuxième élément de spirale ; et
    une structure de butée (140) sur ladite goupille excentrique (136), destinée à contacter sélectivement une surface de butée (142) sur ledit bloc à coulisse (138) et à empêcher le déplacement dudit bloc à coulisse (138) vers ladite surface arrière (60), caractérisé en ce que ladite structure de butée (140) ne contacte pas ladite surface de butée (142) dans la majeure partie des cas ; ledit bloc à coulisse (138) pouvant être déplacé le long de ladite goupille excentrique (136) et vers ledit deuxième élément de spirale jusqu'à ce qu'il contacte ladite structure de butée (140).
  2. Compresseur à spirales selon la revendication 1, dans lequel ladite goupille excentrique (136) comporte une surface d'entraînement plate (54), déplacée sélectivement en vue de son engagement dans une surface plate complémentaire (52) dans un alésage dans ledit bloc à coulisse (138).
  3. Compresseur à spirales selon la revendication 2, dans lequel ladite surface plate (54) sur ladite goupille excentrique (136) a une forme légèrement en baril.
  4. Compresseur à spirales selon la revendication 1, dans lequel ladite structure de butée (140) englobe une seule butée (140) s'étendant au-delà de la surface nominale de ladite goupille excentrique (136), ladite surface de butée (142) dans ledit bloc à coulisse (138) englobant une encoche (142) dans une surface extrême dudit bloc à coulisse (138), contactant sélectivement ladite butée (140).
  5. Compresseur à spirales selon la revendication 1, dans lequel ladite structure de butée (140) est constituée par une partie supérieure légèrement agrandie de ladite goupille excentrique (136), ajustée dans une encoche (142) dans le bloc à coulisse (138).
  6. Compresseur à spirales selon la revendication 1, dans lequel la dimension externe extrême (B) sur ladite goupille excentrique (136), englobant ladite structure de butée (140), est inférieure à une dimension interne (A) d'un alésage dans ledit bloc à coulisse (138), de sorte que ledit bloc à coulisse (138) peut être déplacé au-dessus de ladite goupille excentrique (136).
  7. Compresseur à spirales selon la revendication 1, dans lequel ladite goupille excentrique (136) et ledit bloc à coulisse (138) comportent des surfaces d'entraînement complémentaires (54, 52), mises en contact lors de la rotation en orbite dudit deuxième élément de spirale dans une direction allant vers l'avant, une longueur de ladite surface de butée (142) sur ledit bloc à coulisse (138), mesurée le long de ladite surface d'entraînement (52) étant supérieure à une longueur de ladite structure de butée (140) sur ladite goupille excentrique (136), mesurée le long de ladite surface d'entraînement (54).
  8. Compresseur à spirales selon la revendication 1, dans lequel ladite goupille excentrique (136) comporte une surface d'entraînement plate (54), déplacée sélectivement en vue de son engagement dans une surface plate complémentaire (52) dans un alésage dans ledit bloc à coulisse (138) ; et
    ladite surface de butée (142) sur ledit bloc à coulisse (138) comprenant une encoche (142) sur ledit bloc à coulisse (138), et ladite structure de butée (140) englobant une seule butée (140), s'étendant au-delà d'une surface nominale de ladite goupille excentrique (136).
  9. Compresseur à spirales selon la revendication 8, dans lequel ladite surface plate (54) sur ladite goupille excentrique (136) a une forme légèrement en baril.
  10. Compresseur à spirales selon la revendication 8, dans lequel la dimension externe extrême (B) sur ladite goupille excentrique (136), englobant ladite structure de butée (140), est inférieure à une dimension interne (A) d'un alésage dans ledit bloc à coulisse (138), de sorte que ledit bloc à coulisse (138) peut être déplacé au-dessus de ladite goupille excentrique (136).
  11. Compresseur à spirales selon la revendication 8, dans lequel ladite goupille excentrique (136) et ledit bloc à coulisse (138) comportent des surfaces d'entraînement complémentaires (54, 52), mises en contact lors de la rotation en orbite dudit deuxième élément de spirale dans une direction allant vers l'avant, une longueur de ladite surface de butée (142) sur ledit bloc à coulisse (138), mesurée le long de ladite surface d'entraînement (52), étant supérieure à une longueur de ladite structure de butée (140) sur ladite goupille excentrique (136), mesurée le long de ladite surface d'entraînement (54).
  12. Compresseur à spirales selon la revendication 8, dans lequel ladite structure de butée (140) est constituée par une partie supérieure légèrement agrandie de ladite goupille excentrique (136), ajustée dans une encoche (142) dans ledit bloc à coulisse (138).
EP20070251632 2007-04-18 2007-04-18 Compresseur à spirales à structure bloquante pour éviter un mouvement de la chemise d'arbre Expired - Fee Related EP1983196B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20070251632 EP1983196B1 (fr) 2007-04-18 2007-04-18 Compresseur à spirales à structure bloquante pour éviter un mouvement de la chemise d'arbre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20070251632 EP1983196B1 (fr) 2007-04-18 2007-04-18 Compresseur à spirales à structure bloquante pour éviter un mouvement de la chemise d'arbre

Publications (2)

Publication Number Publication Date
EP1983196A1 EP1983196A1 (fr) 2008-10-22
EP1983196B1 true EP1983196B1 (fr) 2011-07-20

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EP20070251632 Expired - Fee Related EP1983196B1 (fr) 2007-04-18 2007-04-18 Compresseur à spirales à structure bloquante pour éviter un mouvement de la chemise d'arbre

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7476092B1 (en) * 2007-09-05 2009-01-13 Scroll Technologies Scroll compressor with tapered slider block
US9920762B2 (en) * 2012-03-23 2018-03-20 Bitzer Kuehlmaschinenbau Gmbh Scroll compressor with tilting slider block

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5439360A (en) * 1991-07-22 1995-08-08 Carrier Corporation Self-adjusting crankshaft drive
JPH09329091A (ja) * 1996-06-13 1997-12-22 Daikin Ind Ltd スクロール型流体装置
US6053714A (en) * 1997-12-12 2000-04-25 Scroll Technologies, Inc. Scroll compressor with slider block
KR100590490B1 (ko) * 2003-12-16 2006-06-19 엘지전자 주식회사 스크롤 압축기의 편심부시 스토퍼장치

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