EP1950419A1 - Machine de défilement de fluide - Google Patents

Machine de défilement de fluide Download PDF

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Publication number
EP1950419A1
EP1950419A1 EP08001200A EP08001200A EP1950419A1 EP 1950419 A1 EP1950419 A1 EP 1950419A1 EP 08001200 A EP08001200 A EP 08001200A EP 08001200 A EP08001200 A EP 08001200A EP 1950419 A1 EP1950419 A1 EP 1950419A1
Authority
EP
European Patent Office
Prior art keywords
scroll
movable scroll
fluid machine
type fluid
pin
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Withdrawn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
EP08001200A
Other languages
German (de)
English (en)
Inventor
Yuji Takei
Akiyoshi Higashiyama
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 EP1950419A1 publication Critical patent/EP1950419A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps

Definitions

  • the present invention relates to a scroll-type fluid machine.
  • the scroll-type fluid machine is used, for example, to compress a refrigerant, and has a movable scroll that is set in a housing so as to be revolvable with respect to a fixed scroll.
  • a pressure chamber is formed in between the movable and fixed scrolls. As the movable scroll revolves, the pressure chamber carries out the process of suction, compression, and discharge of the refrigerant.
  • the rotation blocking device for a scroll compressor which is disclosed in Unexamined Japanese Patent Publication No. 2000-27774 has four units, each being formed of a pin and a guiding recess that is in sliding contact with the pin. These units are spaced at 90 degrees from each other in the circumferential direction of the movable scroll.
  • a rotation blocking device of a scroll compressor in Unexamined Japanese Patent Publication No. 2005-240700 also includes four units spaced at 90 degrees from each other in the circumferential direction of a movable scroll. A pin of each unit slidingly contacts a ring that is fixed into a ring hole.
  • the four units of the rotation blocking device are spaced at 90 degrees from each other in the circumferential direction of the movable scroll. Therefore, the loads applied from the movable scroll to the rotation blocking device have to be borne by one of the units when the revolving angle of the movable scroll reaches a certain value. As a result, the contact pressure created between the pin and the inner circumferential surfaces of the guiding recess and the ring in each unit temporarily reaches an extremely high level. Thus the sliding conditions of the pin and the inner circumferential surfaces are severe.
  • bearing steel As material for the pin and a member forming the guiding recess and the like (sliding members) and to subject the pin and the sliding member to pretreatment, such as nitridation, for enhancement of hardness.
  • pretreatment such as nitridation
  • the bearing steel is expensive, and to provide the nitridation treatment is to add another process, so that these methods increase the production cost of the scroll compressor.
  • the scroll-type fluid machine of the invention has a movable scroll that is accommodated in a housing so as to be revolvable with respect to a fixed scroll and a rotation blocking device that blocks a rotation of the movable scroll.
  • the rotation blocking device includes five or more units that are spaced away from each other in a circumferential direction of the movable scroll and block the rotation of the movable scroll in consort with each other.
  • Each of the units has at least one pin and an inner circumferential surface brought into sliding contact with the pin along with a revolution of the movable scroll.
  • the pins of the two or more circumferentially adjacent units are brought into contact with the respective inner circumferential surfaces at any revolving angle of the movable scroll.
  • the rotation blocking device includes the five or more units. To be concrete, among the pins, those of the two or more circumferentially adjacent units are brought into contact with the respective inner circumferential surfaces at any revolving angle of the movable scroll. Accordingly, regardless of the revolving angle of the movable scroll, loads applied from the movable scroll to the rotation blocking device are always distributed to two or more of the units. This reduces contact pressure produced between the pin and the inner circumferential surface of each of the units, and prevents an abrasion of the pin and the inner circumferential surface. Since the contact pressure is reduced, it is not necessary to use special material for the pin and a member forming the inner circumferential surface or provide pretreatment. Consequently, the scroll-type fluid machine of the invention is low in price in spite of being provided with the rotation blocking device of high durability.
  • the inner circumferential surface is a side wall of a hole formed in a member facing a substrate of the movable scroll.
  • the pin slidingly contacts the side wall of the hole formed in the member facing the substrate of the movable scroll. Since each unit has a very simple structure constituted by the pin and the hole, the scroll-type fluid machine is particularly low in price.
  • the scroll-type fluid machine is used to compress CO 2 gas.
  • the scroll-type fluid machine is operated at a high number of revolutions for compression of CO 2 gas, the abrasion of the pins and the inner circumferential surfaces is prevented because the sliding conditions of the pins and the inner circumferential surfaces are relieved.
  • FIG. 1 shows a scroll-type fluid machine according to one embodiment of the present invention.
  • the fluid machine is applied, for example, to a refrigeration system, an airconditioning system, a hot-water supply system, etc., and compresses a refrigerant or the like as working fluid.
  • the scroll-type fluid machine has a housing (airtight container) 2.
  • the housing 2 is constituted by a cylinder 4, and an upper cover 6 and a lower cover 8 that are airtightly fitted to upper and lower ends, respectively, of the cylinder 4.
  • the cylinder 4 is connected with a suction pipe 10 for introducing a refrigerant into the housing 2.
  • a discharge pipe 12 for discharging the refrigerant compressed in the housing 2 is connected to the upper cover 6.
  • an electric motor 14 Accommodated in the cylinder 4 is an electric motor 14, which has a cylindrical stator 14a.
  • the stator 14a is fixed to the cylinder 4.
  • a column-shaped rotor 14b is rotatably and concentrically placed within the stator 14a.
  • the rotor 14b is axially pierced by a rotary shaft 16.
  • the rotary shaft 16 is rotatable integrally with the rotor 14b. Accordingly, the rotary shaft 16 is rotated by supplying power to the electric motor 14.
  • the rotary shaft 16 has an inner channel 16a running through the rotary shaft 16 in the axial direction.
  • the lower end of the rotary shaft 16 reaches a central hole of a partition wall 18.
  • a sleeve 20 with a collar that fits over the lower end of the rotary shaft 16 is set in the central hole of the partition wall 18.
  • a needle bearing 21 is interposed between the sleeve 20 and the rotary shaft 16.
  • the partition wall 18 divides the housing 2 into upper and lower parts.
  • An oil storage chamber 24 that stores lubricating oil is marked off between the partition wall 18 and the lower cover 8.
  • An end plate 22 is fixed onto the partition wall 18 to block up a lower end of the sleeve 20.
  • an outer rotor 23a with internal teeth and an inner rotor 23b with external teeth are accommodated in a recess formed in the collar of the sleeve 20.
  • the outer rotor 23a is fixed to an inner circumferential surface of the recess.
  • the inner rotor 23b is fitted to the lower end of the rotary shaft 16 so as to be integrally rotatable.
  • the sleeve 20 and the end plate 22 form a casing of a trochoid pump 26.
  • An outlet of the trochoid pump 26, which is formed in an upper face of the end plate 22, communicates with the inner channel 16a of the rotary shaft 16.
  • the trochoid pump 26 has an inlet that opens in a lower face of the end plate 22. The inlet faces into the oil storage chamber 24 and leads to the vicinity of a bottom of the oil storage chamber 24 through a nozzle 28 that is fixed to the partition wall 18.
  • An introduction hole 18a for the lubricating oil is produced in the partition wall 18.
  • the lubricating oil that flows down from above in the cylinder 4 enters the oil storage chamber 24 through the introduction hole 18a.
  • An upper part of the rotary shaft 16 is formed into an eccentric bushing 30.
  • the eccentric bushing 30 is encircled by a boss 34a of the movable scroll 34 with a sliding bearing 32 interposed therebetween.
  • the movable scroll 34 is revolvably situated in a space formed between an upper block 36 and a lower block (center frame) 38.
  • the upper block 36 and the center frame 38 are fixed to the cylinder 4 by welding.
  • a swirling wall 40 engaging with a swirling wall 34b of the movable scroll 34.
  • a pressure chamber 42 is formed in between the upper block 36 and the movable scroll 34.
  • the upper block 36 functions as a fixed scroll. Therefore, the upper block 36 is also referred hereinafter to as a fixed scroll 36.
  • the pressure chamber 42 is displaced from the radial outside of the movable scroll 34 toward radial inside thereof along the swirling wall 34b. At the same time, the pressure chamber 42 is reduced in capacity. To put it differently, the pressure chamber 42 is capable of compressing the working fluid that is sucked in on the radial outside.
  • the fixed scroll 36 is provided with a communicating path, not shown, which connects the pressure chamber 42 located on the radial outside to an inner end of the suction pipe 10.
  • a discharge hole 44 is formed in the fixed scroll 36.
  • the discharge hole 44 axially pierces through a substantial center of the fixed scroll 36.
  • the discharge hole 44 is opened/closed by a lead valve that functions as a discharge valve 46.
  • the discharge valve 46 is covered with a cover 48.
  • Space in the cover 48 is connected to the partition wall 18 through downward channels, not shown, for the working fluid and the lubricating oil contained in the working fluid, which are formed in the fixed scroll 36, the center frame 38 and the rotor 14b, and also through gaps between slots in the stator 14a.
  • An upward channel for the working fluid that flows from the partition wall 18 to the upper cover 6, or the discharge pipe 12 is formed along the peripheries of the stator 14a, the center frame 38, and the fixed scroll 36.
  • a recess In an upper part of the center frame 38, there is formed a recess in which a substrate 34c of the movable scroll 34 is revolvably accommodated.
  • An intermediate hole that receives the boss 34a of the movable scroll 34 opens in the center of a bottom 50 of the recess.
  • a shaft hole extends between a bottom of the intermediate hole and a lower end of the center frame 38.
  • a sliding bearing 52 is interposed between the shaft hole and the rotary shaft 16.
  • the substrate 34c of the movable scroll 34 and the bottom 50 of the recess face each other across a given gap in the axial direction of the rotary shaft 16.
  • a rotation blocking device that blocks the rotation of the movable scroll 34 during the revolution of the movable scroll 34.
  • the rotation blocking device has six pins 54.
  • Each of the pins 54 has a base pressed into a pin hole that opens in a back face of the substrate 34c.
  • a tip end of the pin 54 is interfitted in a bottomed hole 56 that opens in the bottom 50 of the recess.
  • a rotation blocking device has six units 58, each of which is constituted by one pin 54 and one bottomed hole 56.
  • the pin 54 is in contact with a side wall, or an inner circumferential surface, of the bottomed hole 56 at an outer circumferential surface thereof in a given circumferential position corresponding to a circumferential position (revolving angle) of the movable scroll 34. Comparing the units 58 to each other, the circumferential positions of the pins 54 in the bottomed holes 56 coincide, with each other.
  • the pressure chamber 42 carries out a sequence of processes including the steps of sucking in the working fluid through the suction pipe 10, compressing the working fluid that has been sucked in, and discharging the compressed working fluid to the discharge pipe 12.
  • FIG. 3 shows a relationship between the revolving angle of the movable scroll 34 and loads applied from the outer circumferential surfaces of the pins 54 onto the inner circumferential surfaces of the bottomed holes 56.
  • Curved lines A, B, C, D, E and F indicate the loads applied from the respective pins 54 in relative values.
  • the loads periodically change with the same magnitude, the same time and phase differences in multiples of 60 degrees among all the six units 58 so as to correspond to the revolving angle of the movable scroll 34.
  • positive loads are applied to the bottomed holes 56 from at least the two or more adjacent pins 54, whatever the revolving angle of the movable scroll 34 is. That is to say, regardless of the revolving angle of the movable scroll 34, loads applied from the movable scroll 34 to the rotation blocking device are always distributed to two or more of the units 58.
  • the distribution of the loads improves a safety ratio (allowable stress/load) in each unit 58, and enhances the reliability of the rotation blocking device.
  • FIG. 4 shows a cross-section of a scroll-type fluid machine of a comparative example.
  • This fluid machine has four units 58.
  • Curved lines V, W, X and Y shown in FIG. 5 represent loads applied to the units 58 in the scroll-type fluid machine of the comparative example. For example, when the revolving angle is 90 degrees, only one unit 58 is applied with the loads.
  • the invention is not limited to the above-described one embodiment, and may be modified in various fashions.
  • the rotation blocking device of the scroll-type fluid machine has the six units 58.
  • the number of the units 58 has only to be at least five or more.
  • each unit 58 of the rotation blocking device of the scroll-type fluid machine is constituted by the pin 54 and the bottomed hole 56, there is no constraint in the structure of each unit 58.
  • bearing steel is desirable as material of the pins 54.
  • the center frame 36 is made of cast iron, it is preferable that surface treatment such as nitridation be provided to the inner circumferential surfaces of the bottomed holes 56.
  • the pins 54 and the inner circumferential surfaces of the bottomed holes 56 preferably have hardness of 60 HRC or more.
  • the pins 54 may be made of alloy steel for structural use.
  • FIG. 6 shows a unit 60 according to a modification example.
  • the unit 60 has a bottomed hole 62 with a larger diameter, and a sliding ring 64 is interfitted in the bottomed hole 62.
  • the pin 54 slidingly contacts the inner circumferential surface of the sliding ring 64.
  • FIG. 7 shows a unit 66 according to another modification example.
  • the unit 66 has a bottomed hole 68 with a still larger diameter.
  • a second pin 70 is set up in the center of the bottomed hole 68.
  • a sliding ring 72 encircling the pin (first pin) 54 and the second pin 70 is revolvably disposed in the bottomed hole 68.
  • outer circumferential surfaces of the first and second pins 54 and 70 are brought into sliding contact with an inner circumferential surface of the sliding ring 72.
  • an outer circumferential surface of the sliding ring 72 slidingly contacts an inner circumferential surface of the bottomed hole 68.
  • each unit 58 has the very simple structure constituted by the pin 54 and the bottomed hole 56, the scroll-type fluid machine can be offered at a particularly low price.
  • the above-described scroll-type fluid machine is applicable to compression of various working fluids, but is preferably used to compress CO 2 gas. The reason is that, even if the scroll-type fluid machine is operated at a high number of revolutions, the abrasion of the pins 54 and the inner circumferential surfaces of the bottomed holes 56 is prevented due to the improved sliding conditions of the pins 54 and the inner circumferential surfaces of the bottomed holes 56.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
EP08001200A 2007-01-23 2008-01-23 Machine de défilement de fluide Withdrawn EP1950419A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007012344A JP2008180094A (ja) 2007-01-23 2007-01-23 スクロール型流体機械

Publications (1)

Publication Number Publication Date
EP1950419A1 true EP1950419A1 (fr) 2008-07-30

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Family Applications (1)

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EP08001200A Withdrawn EP1950419A1 (fr) 2007-01-23 2008-01-23 Machine de défilement de fluide

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EP (1) EP1950419A1 (fr)
JP (1) JP2008180094A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104227334A (zh) * 2013-06-12 2014-12-24 株式会社丰田自动织机 用于制造涡旋式压缩机的防旋转环的方法和防旋转机构
DE102014113435A1 (de) * 2014-09-17 2016-03-17 Bitzer Kühlmaschinenbau Gmbh Kompressor
WO2016107601A1 (fr) * 2014-12-31 2016-07-07 丹佛斯（天津）有限公司 Compresseur à tourbillon
CN111788394A (zh) * 2018-03-05 2020-10-16 三菱电机株式会社 压缩机
CN114754001A (zh) * 2022-05-20 2022-07-15 重庆超力高科技股份有限公司 双型线压缩机动涡盘防自转结构和涡旋压缩机
WO2024027987A1 (fr) * 2022-08-02 2024-02-08 OET GmbH Compresseur à spirale

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022112858A (ja) * 2021-01-22 2022-08-03 三菱重工サーマルシステムズ株式会社 圧縮機

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59110885A (ja) * 1982-12-17 1984-06-26 Hitachi Ltd スクロ−ル圧縮機
JPS62199983A (ja) 1986-02-27 1987-09-03 Nippon Soken Inc 公転型圧縮機
US5147192A (en) 1989-05-24 1992-09-15 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Scroll-type fluid compressor with rotation preventing coupling members
US5458472A (en) * 1992-10-28 1995-10-17 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Scroll type compressor having thrust regulation on the eccentric shaft
DE19928808A1 (de) 1998-06-23 1999-12-30 Denso Corp Spiralkompressor
JP2000027774A (ja) * 1998-07-10 2000-01-25 Toyota Autom Loom Works Ltd スクロール型圧縮機における可動スクロール部材の自転阻止構造
JP2005240700A (ja) * 2004-02-26 2005-09-08 Mitsubishi Heavy Ind Ltd スクロール圧縮機

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5892489U (ja) * 1981-12-18 1983-06-22 三菱重工業株式会社 スクロ−ル型流体機械
JP3371488B2 (ja) * 1993-03-30 2003-01-27 株式会社日本自動車部品総合研究所 スクロール型圧縮機
JP2003206871A (ja) * 2002-01-16 2003-07-25 Mitsubishi Heavy Ind Ltd スクロール圧縮機

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59110885A (ja) * 1982-12-17 1984-06-26 Hitachi Ltd スクロ−ル圧縮機
JPS62199983A (ja) 1986-02-27 1987-09-03 Nippon Soken Inc 公転型圧縮機
US5147192A (en) 1989-05-24 1992-09-15 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Scroll-type fluid compressor with rotation preventing coupling members
US5458472A (en) * 1992-10-28 1995-10-17 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Scroll type compressor having thrust regulation on the eccentric shaft
DE19928808A1 (de) 1998-06-23 1999-12-30 Denso Corp Spiralkompressor
JP2000027774A (ja) * 1998-07-10 2000-01-25 Toyota Autom Loom Works Ltd スクロール型圧縮機における可動スクロール部材の自転阻止構造
JP2005240700A (ja) * 2004-02-26 2005-09-08 Mitsubishi Heavy Ind Ltd スクロール圧縮機

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104227334A (zh) * 2013-06-12 2014-12-24 株式会社丰田自动织机 用于制造涡旋式压缩机的防旋转环的方法和防旋转机构
US9803641B2 (en) 2013-06-12 2017-10-31 Kabushiki Kaisha Toyota Jidoshokki Method for manufacturing anti-rotation ring of scroll type compressor and anti-rotation mechanism of the scroll type compressor
DE102014113435A1 (de) * 2014-09-17 2016-03-17 Bitzer Kühlmaschinenbau Gmbh Kompressor
US10634141B2 (en) 2014-09-17 2020-04-28 Bitzer Kuehlmaschinenbau Gmbh Scroll compressor having axial guide support
US11396877B2 (en) 2014-09-17 2022-07-26 Bitzer Kuehlmaschinenbau Gmbh Scroll compressor having axial guide support
WO2016107601A1 (fr) * 2014-12-31 2016-07-07 丹佛斯（天津）有限公司 Compresseur à tourbillon
CN111788394A (zh) * 2018-03-05 2020-10-16 三菱电机株式会社 压缩机
CN114754001A (zh) * 2022-05-20 2022-07-15 重庆超力高科技股份有限公司 双型线压缩机动涡盘防自转结构和涡旋压缩机
CN114754001B (zh) * 2022-05-20 2024-04-16 重庆超力高科技股份有限公司 双型线压缩机动涡盘防自转结构和涡旋压缩机
WO2024027987A1 (fr) * 2022-08-02 2024-02-08 OET GmbH Compresseur à spirale

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