WO2012144489A1 - Machine à fluide à volute - Google Patents

Machine à fluide à volute Download PDF

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Publication number
WO2012144489A1
WO2012144489A1 PCT/JP2012/060346 JP2012060346W WO2012144489A1 WO 2012144489 A1 WO2012144489 A1 WO 2012144489A1 JP 2012060346 W JP2012060346 W JP 2012060346W WO 2012144489 A1 WO2012144489 A1 WO 2012144489A1
Authority
WO
WIPO (PCT)
Prior art keywords
scroll
thrust plate
movable scroll
pin
fluid machine
Prior art date
Application number
PCT/JP2012/060346
Other languages
English (en)
Japanese (ja)
Inventor
井尻　誠
史雄 赤岩
Original Assignee
サンデン株式会社
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 サンデン株式会社 filed Critical サンデン株式会社
Publication of WO2012144489A1 publication Critical patent/WO2012144489A1/fr

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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
    • 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
    • F04C18/0253—Details concerning the base

Definitions

  • the present invention relates to a scroll type fluid machine, for example, a scroll type fluid machine suitable for use in a vehicle air conditioner.
  • a fixed scroll and a movable scroll cooperate to partition a compression chamber or an expansion chamber as a pressure chamber for the working fluid.
  • the movable scroll is supported so as to be capable of revolving at the inner end of the front housing located on the back side of the end plate on which the spiral body of the movable scroll is erected.
  • a thrust plate having a sliding surface that receives a thrust load as the movable scroll slides is disposed.
  • the present invention has been made based on the above-described circumstances, and the object thereof is to improve the durability and noise of the thrust plate while improving the lubrication performance of the scroll unit with a simple configuration, and thus to improve the durability and noise of the rotation prevention mechanism.
  • An object of the present invention is to provide a scroll type fluid machine capable of realizing reduction.
  • a scroll type fluid machine of the present invention is a scroll type fluid machine in which a fixed scroll and a movable scroll cooperate to partition a pressure chamber of a working fluid, and a scroll body of the movable scroll is set up.
  • a support member that supports the movable scroll so as to be capable of revolving on the back side of the end plate provided, and a sliding surface that is disposed between the end plate and the support member and receives the thrust load as the movable scroll slides.
  • the thrust plate has an oil reservoir portion including a concave portion of the sliding surface and a convex portion on the back surface thereof, and the support member has an engaging portion with which the convex portion is engaged.
  • the thrust plate is provided between the end plate and the support member, and includes a pin and a rotation prevention mechanism including a loosely fitting portion in which the pin is loosely fitted, which prevents the rotation of the movable scroll.
  • a rotation prevention mechanism including a loosely fitting portion in which the pin is loosely fitted, which prevents the rotation of the movable scroll.
  • the through hole is not in contact with the pin.
  • the gap between the convex portion and the engaging portion is the allowable movement amount of the thrust plate.
  • the thrust plate has the oil reservoir portion including the concave portion of the sliding surface and the convex portion on the back surface of the sliding surface, and the support member is engaged with the convex portion. Has a joint.
  • the movement of the thrust plate can be regulated by the oil reservoir of the thrust plate. Therefore, it is possible to suppress the rattling of the thrust plate while improving the lubrication performance of the scroll unit without separately providing a fixing means for the thrust plate, so that the durability of the thrust plate is improved with a simple structure and the noise is reduced. Can be realized.
  • the thrust plate has a through hole through which the pin of the rotation prevention mechanism is penetrated, the oil reservoir is engaged with the engaging portion to restrict the movement of the thrust plate, so that the contact range between the through hole and the pin It is possible to regulate the movement of the thrust plate while minimizing the above. Accordingly, unnecessary contact of the pins, and damage and wear of the pins accompanying it, can be prevented, so that durability improvement and noise reduction of both the thrust plate and the rotation prevention mechanism can be realized.
  • the through hole is not in contact with the pin, it is possible to prevent the contact surface of the pin receiving the load from being damaged when the thrust plate is assembled or the movable scroll revolves to prevent the movable scroll from rotating. . Therefore, the durability of the pin, and thus the rotation prevention mechanism can be further effectively improved.
  • the gap between the convex portion and the engaging portion is the allowable movement amount of the thrust plate, the movement amount of the thrust plate can be reliably regulated at least within the range of the gap.
  • FIG. 2 is a plan view of a thrust plate viewed from the AA direction in FIG. 1.
  • FIG. 3 is a cross-sectional view of a thrust plate and a rotation prevention mechanism as seen from the BB direction of the circular hole of FIG.
  • FIG. 3 is a cross-sectional view of a thrust plate and a rotation prevention mechanism as seen from the CC direction of the oil reservoir in FIG. 2. It is sectional drawing of the thrust plate and rotation prevention mechanism in the oil reservoir which concerns on the modification of this invention.
  • FIG. 1 shows a scroll compressor (scroll type fluid machine) 1 according to a first embodiment of the present invention.
  • the compressor 1 is incorporated in a refrigeration circuit for air-conditioning a vehicle, and is used for compression of a refrigerant (working fluid) circulating in the refrigeration circuit.
  • the compressor 1 includes a rear housing 2 and a front housing (support member) 4, and a scroll unit 6 is sandwiched between the rear housing 2 and the front housing 4.
  • the scroll unit 6 includes a fixed scroll 8 fixed to each of the housings 2 and 4 and a movable scroll 10 assembled so as to mesh with the fixed scroll 8.
  • the compressor 1 is a horizontal scroll compressor in which the orbiting axis of the movable scroll 10 is horizontal, and the scroll unit 6 continuously performs a series of processes from suction of refrigerant to compression through discharge by the orbiting movement of the movable scroll 10. And run.
  • a discharge chamber 12 is formed in the rear housing 2 between its end plate and the fixed scroll 8 of the scroll unit 6, and the discharge chamber 12 is formed in a discharge hole (illustrated) formed in the end plate 8 a of the fixed scroll 8. Not connected to the refrigerant circulation path of the refrigeration circuit via a discharge port (not shown) formed in the rear housing 2.
  • a refrigerant suction port 16 is recessed in the outer peripheral wall 4 a of the front housing 4, and the refrigerant introduced from the refrigerant circulation path via the suction port 16 is sucked into the scroll unit 6.
  • a drive shaft 18 is disposed in the front housing 4, and the drive shaft 18 has a large-diameter end portion 20 and a small-diameter shaft portion 22.
  • the large diameter end portion 20 is rotatably supported by the front housing 4 via a needle bearing 24, and the small diameter shaft portion 22 is rotatably supported by the front housing 4 via a ball bearing 26.
  • a lip seal 28 is disposed between the small diameter shaft portion 22 and the front housing 4, and the lip seal 28 partitions the inside of the front housing 4 in an airtight manner.
  • the drive pulley 30 is rotatably supported by the front housing 4 via a bearing 32. Yes.
  • the driving pulley 30 is connected to an output pulley on the engine side of the vehicle via a belt, and is rotated by receiving power from the engine. Therefore, during driving of the engine, if the electromagnetic clutch in the drive pulley 30 is on, the drive shaft 18 rotates with the drive pulley 30.
  • a crank pin 34 projects from the large-diameter end 20 of the drive shaft 18 toward the movable scroll 10, and the crank pin 34 supports the boss 40 of the movable scroll 10 via an eccentric bush 36 and a needle bearing 38. Yes. Accordingly, when the drive shaft 18 is rotated, the movable scroll 10 undergoes a revolving orbit through the crank pin 34 and the eccentric bush 36. Further, a rotation prevention mechanism 42 (see FIG. 3) is disposed between the front housing 4 and the end plate 10a of the movable scroll 10.
  • the fixed scroll 8 has a fixed spiral body 50 integrally formed with the end plate 8a
  • the movable scroll 10 also has a movable spiral body (spiral body) 52 formed integrally with the end plate 10a.
  • the inner and outer surfaces of the fixed and movable spiral bodies 50 and 52 are formed of involute curved surfaces except for the central end portion thereof.
  • the discharge hole described above is positioned in the vicinity of the central end portion 54 of the fixed spiral body 50, and a certain clearance is secured between the inner surface of the central end portion 54.
  • a fixed tip seal 56 is provided at the tip of the fixed spiral body 50, and a movable tip seal 58 is provided at the tip of the movable spiral body 52.
  • the fixed spiral body 50 and the end plate 10 a are slidably contacted with each other via a fixed chip seal 56, and the movable spiral body 52 and the end plate 8 a are slidably contacted with each other via a movable chip seal 58.
  • the refrigerant introduced from the suction port 16 by the sliding contact between the fixed and movable scrolls 8 and 10 is sucked into the scroll unit 6 and the fixed and movable scrolls 8 and 10 cooperate to fix the fixed and movable spiral bodies.
  • a pressure chamber (compression chamber or expansion chamber) 60 of refrigerant gas containing mist-like lubricating oil is defined between 50 and 52, and the above-described series of processes are continuously performed.
  • the front housing 4 is formed with an inner end 62 of the outer peripheral wall 4 a in an annular shape, and the inner end 62 has an axial direction of the drive shaft 18 on the back surface 64 side of the end plate 10 a of the movable scroll 10.
  • a thrust load generated by the compression reaction force generated when the compression chamber 60 is partitioned is applied in the orbiting axis direction of the movable scroll 10.
  • a suction hole 68 communicating with the suction port 16 is opened in the inner end surface 66 of the inner end portion 62 facing the back surface 64.
  • the movable scroll 10 is supported at the inner end 62 so as to be capable of revolving.
  • a thrust plate 70 that receives the thrust load of the movable scroll 10 is disposed between the end plate 10 a and the inner end 62.
  • FIG. 2 is a plan view of the thrust plate 70 viewed from the direction AA in FIG.
  • the thrust plate 70 is formed in an annular shape, and has a sliding surface 72 on which the back surface 64 is slid as the movable scroll 10 revolves, and the thrust load of the movable scroll 10 is directly applied to the sliding surface 72.
  • Act on. 3 is a cross-sectional view of the thrust plate 70 and the rotation prevention mechanism 42 when the circular hole 74 formed in the thrust plate 70 is viewed from the BB direction, and FIG. 4 shows the oil reservoir 76 formed in the thrust plate 70.
  • FIG. 6 is a cross-sectional view of the thrust plate 70 and the rotation prevention mechanism 42 as seen from the CC direction.
  • the rotation prevention mechanism 42 is disposed between the end plate 10a and the inner end portion 62.
  • the rotation prevention mechanism 42 is disposed between the end plate 10a and the inner end portion 62.
  • four pins 78 and four holes (free fitting portions) for preventing the rotation of the movable scroll 10 are provided.
  • the pin-and-hole mechanism is constituted by 80, and each pin 78 is loosely fitted in each hole 80, thereby allowing the revolving motion of the movable scroll 10 while preventing its rotation.
  • a circular hole 74 is formed through the thrust plate 70 at a position corresponding to each pin 78, and each pin 78 is inserted into each circular hole 74.
  • the circular holes 74 formed at four positions in the up, down, left, and right directions as seen in FIG. 2 have a predetermined gap G between the pin 78 and have a large hole diameter Dh with respect to the pin diameter Dp.
  • the pin 78 erected on the inner end 62 is loosely fitted into a hole 80 recessed in the end plate 10 a in a non-contact state with the circular hole 74.
  • the oil reservoirs 76 formed at four locations between the circular holes 74 as seen in FIG. 2 have circular recesses 82 in the plan view on the sliding surface 72, and circles in plan view on the back surface 83 of the recess 82.
  • a convex portion 84 having a shape is formed.
  • the concave portion 82 and the convex portion 84 which are depressions in which lubricating oil is accumulated, are simultaneously formed by extrusion processing, so that the outer diameter Do of the convex portion 84 is larger than the inner diameter Di of the concave portion 82.
  • circular engagement holes (engaging portions) 86 with which the respective convex portions 84 are engaged are formed on the inner end surface 66 at positions where the respective convex portions 84 face each other. .
  • the engaging hole 86 is formed with a depth longer than the protruding height of the convex portion 84, and the convex portion 84 does not contact the engaging hole 86 even when the back surface 83 is in contact with the inner end surface 66, The entire portion 84 is accommodated in the engagement hole 86.
  • the hole diameter De of the engagement hole 86 is substantially the same as the outer diameter Do of the convex portion 84, the movement amount of the thrust plate 70 relative to the pin 78 is restricted to zero.
  • the thrust plate 70 has the oil reservoir 76 including the concave portion 82 and the convex portion 84, and the convex portion 84 is engaged with the inner end surface 66 of the front housing 4. Therefore, the movement of the thrust plate 70 can be restricted by the oil reservoir 76, and the rotation of the thrust plate 70 accompanying the revolving turning motion of the movable scroll 10 can be suppressed. Therefore, since it is possible to suppress the rattling of the thrust plate 70 while improving the lubrication performance of the scroll unit 6 without separately providing a fixing means for the thrust plate 70, the durability of the thrust plate 70 can be improved with a simple configuration. And noise reduction can be realized.
  • the four oil reservoirs 76 and the engagement holes 86 are provided, so that the lubrication performance of the scroll unit 6 is improved, and the rotation of the thrust plate 70 accompanying the revolution turning motion of the movable scroll 10 and the cause thereof. Since sticking can be reliably prevented, the durability of the thrust plate 70 can be improved and the noise can be reduced more effectively.
  • the thrust plate 70 has a circular hole 74 through which the pin 78 of the rotation prevention mechanism 42 is passed, the oil reservoir 76 is engaged with the engagement hole 86 to restrict the movement of the thrust plate 70.
  • the movement of the thrust plate 70 can be restricted while the contact range between the hole 74 and the pin 78 is minimized. Therefore, unnecessary contact of the pin 78 and accompanying damage and wear of the pin 78 can be prevented, so that the durability of both the thrust plate 70 and the rotation prevention mechanism 42 can be improved and noise can be reduced.
  • the contact surface of the pin 78 that receives a load when the movable scroll 10 is prevented from rotating when the thrust plate 70 is assembled or during the revolution of the movable scroll 10 is damaged. It can be prevented from sticking. Accordingly, the durability of the pin 78, and thus the rotation prevention mechanism 42, can be further effectively improved.
  • the present invention is not limited to the above-described embodiment, and various modifications can be made.
  • four sets of pins 78 and holes 80 are formed and four oil reservoirs 76 are also formed, but the present invention is not limited to this configuration.
  • three or more pairs of pins 78 and holes 80 are necessary for the mechanism. If at least one, preferably two or more oil reservoirs 76 are provided, the thrust is provided. The movement of the plate 70 can be reliably regulated.
  • the hole diameter De of the engagement hole 86 is substantially the same as the outer diameter Do of the convex portion 84, so that the movement amount of the thrust plate 70 relative to the pin 78 is restricted to zero. Can do.
  • the present invention is not limited thereto.
  • a gap G1 may be formed between the engagement hole 86 and the convex portion 84. In this case, the gap G1 becomes the allowable movement amount of the thrust plate 70, and the movement amount of the thrust plate 70 can be reliably regulated at least within the range of the gap G1.
  • the gap G1 needs to be formed at least smaller than the gap G in the circular hole 74.
  • the rotation prevention mechanism 42 of the above embodiment is a pin and hole type mechanism, but is not limited to this mechanism, and any mechanism including a pin 78 and a loosely fitting portion of the pin 78 may be used, for example, a pin and ring.
  • a mechanism such as a pin and link may be used.
  • the present invention can be applied not only to the horizontal type scroll compressor 1 but also to the vertical type, and the pin 78 is erected on the end plate 10 a and the hole 80 is formed on the inner end 62.
  • the structure of the recessed compressor may be used.
  • the present invention can be applied to scroll-type fluid machines in general such as a scroll expander in which a refrigerant expansion chamber is defined.

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

Abstract

L'invention porte sur une machine à fluide à volute (1) conçue de telle sorte que la volute fixe (8) et la volute mobile (10) coopèrent entre elles pour définir une chambre de pression (60) pour le fluide de travail. La machine à fluide à volute (1) comprend : un élément support (4) qui, sur le côté de surface arrière (64) d'une plaque terminale (10a) sur laquelle s'élève le corps en spirale (52) de la volute mobile, supporte la volute mobile (10) de manière que la volute mobile puisse tourner ; et une plaque de butée (70) qui est placée entre la plaque d'extrémité et l'élément support et qui comporte une surface de glissement (72) soumise à une charge de poussée lorsque la volute mobile glisse. La plaque de butée présente une section de retenue d'huile (76, 88) comprenant une cavité (82) qui se trouve dans la surface de glissement et une saillie (84) qui se trouve sur la surface arrière (83), sur le côté qui est à l'opposé de la surface dans laquelle la cavité (82) est formée. L'élément support présente une section de coopération (86) avec laquelle la saillie coopère.
PCT/JP2012/060346 2011-04-19 2012-04-17 Machine à fluide à volute WO2012144489A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011092889A JP2012225235A (ja) 2011-04-19 2011-04-19 スクロール型流体機械
JP2011-092889 2011-04-19

Publications (1)

Publication Number Publication Date
WO2012144489A1 true WO2012144489A1 (fr) 2012-10-26

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JP (1) JP2012225235A (fr)
WO (1) WO2012144489A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014168084A1 (fr) * 2013-04-08 2014-10-16 サンデン株式会社 Compresseur à spirale
JPWO2022059195A1 (fr) * 2020-09-18 2022-03-24

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6207970B2 (ja) * 2013-10-30 2017-10-04 サンデンホールディングス株式会社 スクロール型流体機械

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6387287U (fr) * 1986-11-27 1988-06-07
JPH01115885U (fr) * 1988-01-29 1989-08-04
JPH0550094U (ja) * 1991-12-09 1993-07-02 三菱電機株式会社 スクロール圧縮機
JPH11336676A (ja) * 1998-03-25 1999-12-07 Tokico Ltd スクロール式流体機械
JP2005315167A (ja) * 2004-04-28 2005-11-10 Sanden Corp スクロール型流体機械
JP2008248817A (ja) * 2007-03-30 2008-10-16 Hitachi Ltd スクロール式流体機械
JP2009114893A (ja) * 2007-11-02 2009-05-28 Denso Corp スラストすべり軸受及びこのスラストすべり軸受を有するスクロール型圧縮機

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6387287U (fr) * 1986-11-27 1988-06-07
JPH01115885U (fr) * 1988-01-29 1989-08-04
JPH0550094U (ja) * 1991-12-09 1993-07-02 三菱電機株式会社 スクロール圧縮機
JPH11336676A (ja) * 1998-03-25 1999-12-07 Tokico Ltd スクロール式流体機械
JP2005315167A (ja) * 2004-04-28 2005-11-10 Sanden Corp スクロール型流体機械
JP2008248817A (ja) * 2007-03-30 2008-10-16 Hitachi Ltd スクロール式流体機械
JP2009114893A (ja) * 2007-11-02 2009-05-28 Denso Corp スラストすべり軸受及びこのスラストすべり軸受を有するスクロール型圧縮機

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014168084A1 (fr) * 2013-04-08 2014-10-16 サンデン株式会社 Compresseur à spirale
JP2014202161A (ja) * 2013-04-08 2014-10-27 サンデン株式会社 スクロール型圧縮機
CN105074221A (zh) * 2013-04-08 2015-11-18 三电控股株式会社 涡旋式压缩机
JPWO2022059195A1 (fr) * 2020-09-18 2022-03-24
WO2022059195A1 (fr) * 2020-09-18 2022-03-24 三菱電機株式会社 Compresseur à spirale
JP7313570B2 (ja) 2020-09-18 2023-07-24 三菱電機株式会社 スクロール圧縮機

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