US20120244026A1 - Counterweight incorporated into slider block for scroll compressor - Google Patents
Counterweight incorporated into slider block for scroll compressor Download PDFInfo
- Publication number
- US20120244026A1 US20120244026A1 US13/156,606 US201113156606A US2012244026A1 US 20120244026 A1 US20120244026 A1 US 20120244026A1 US 201113156606 A US201113156606 A US 201113156606A US 2012244026 A1 US2012244026 A1 US 2012244026A1
- Authority
- US
- United States
- Prior art keywords
- slider block
- scroll compressor
- set forth
- counterweight
- angle
- 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.)
- Abandoned
Links
Images
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
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/807—Balance weight, counterweight
-
- 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
- This application relates to a scroll compressor wherein a counterweight is incorporated into the drive connection such that it surrounds a slider block.
- a first scroll member has a base and a generally spiral wrap extending perpendicularly from the base.
- the first scroll member interfits with the wraps of a second scroll member.
- the second scroll member is driven to orbit by a drive connection relative to the first scroll member, and as it orbits, the wraps move relative to each other to entrap refrigerant, and then decrease the size of compression chambers to compress the refrigerant.
- One standard type of drive connection includes a so-called “slider block.”
- the slider block surrounds an eccentric pin on a drive shaft.
- the slider block interfits upwardly into a boss in the second scroll member.
- the eccentric pin moves eccentrically, and a relatively flat drive face on the pin engages a relatively flat drive face on the slider block to cause the wraps to be held in contact, and the wraps orbit relative to each other.
- Counterweights are also utilized in scroll compressors. It has been known to incorporate a counterweight into the area of the drive connection, such that it surrounds and is fixed to the slider block.
- a scroll compressor has a first scroll member and a second scroll member, each of having a base and a generally spiral wrap extending from their base.
- the second scroll member has a boss extending away from the base in an opposed direction to the wrap.
- a motor drives a drive shaft, which has an eccentric pin extending upwardly into a slider block.
- the slider block is received between the pin and an interior surface of the boss.
- the slider block has an inner bore which receives the eccentric pin, and a generally flat drive surface over a limited circumferential extent to be engaged by a flat drive surface on the eccentric pin.
- a counterweight is positioned on an outer periphery of the slider block.
- the counterweight has a center line defining a first plane.
- a second plane is defined parallel to the first plane and including a point on the flat drive surface of the slider block, with the flat drive surface of the slider block including a third plane, and a non-zero angle defined between the second and third planes being.
- FIG. 1 is a cross-sectional view through a scroll compressor.
- FIG. 2A is a top view of a counterweight.
- FIG. 2B is a cross-section along line A-A of FIG. 2A .
- FIG. 2C is a bottom view of a combined counterweight and slider block.
- FIG. 2D shows one graphical feature of the FIG. 2C combination.
- FIG. 3 shows an alternative feature
- a compressor 20 is illustrated in FIG. 1 having a drive motor 122 driving a shaft 24 .
- Shaft 24 is provided with an eccentric pin 26 .
- a slider block 28 has a bore surrounding the eccentric pin 26 .
- the slider block and pin each have a generally cylindrical section over a good deal of circumferential extent of the two.
- a relatively flat drive face is formed on both the eccentric pin and the slider block over a limited circumferential extent.
- These two relatively flat drive surfaces are brought into contact to cause an orbiting scroll member 21 to orbit relative to a non-orbiting scroll member 22 .
- a non-rotating coupling such as an Oldham coupling, may be positioned to cause the orbiting movement, as known. While the term “flat faces” have been utilized to describe surfaces on the eccentric pin and slider block, in practice, there may be a slight curve or barrel shape to one or both, and the term “flat” should be interpreted with this in mind.
- a counterweight 30 surrounds the slider block 28 .
- a cylindrical ring 36 on the counterweight 30 surrounds the slider block 28 , and an extending portion 34 extends upwardly such that it circumferentially surrounds a boss 32 that receives the slider block 28 and eccentric pin 26 .
- a hydrodynamic oil bearing 400 is positioned intermediate the inner periphery of the boss 32 , and the outer periphery of the slider block 28 .
- refrigerant to be compressed enters the compressor 20 through a suction tube 160 , and flows into a suction pressure chamber 101 surrounding the motor 122 . That refrigerant passes upwardly into compression chambers 105 formed between the scroll members, and is compressed and delivered into a discharge pressure chamber 102 . From the discharge pressure chamber 102 , the refrigerant flows outwardly through a tube 103 .
- FIG. 2A is a bottom view of the counterweight 30 .
- a bore 40 is formed in the interior of the counterweight, and is tightly received on the outer periphery of the slider block 28 .
- the counterweight 30 has a center line 59 , which is a center of weight for the counterweight.
- an angle A is defined at a ramp outer portion 50 which extends upwardly into the extending portion 34 .
- Angle A may be between 20° and 60° . In some embodiments, this angle may be omitted entirely.
- the inner periphery of the bore 40 is provided with a flat 300 , as is the outer periphery of the slider block 28 . This will ensure proper positioning of the counterweight on the slider block.
- a line 159 can be defined which is parallel to the line 59 .
- Line 159 has a point X which is on the flat drive surface 62 .
- the plane of the flat drive surface 62 , and the line 159 define an angle B.
- this angle is non-zero and may be between 6° and 40° , and more particularly between 5° and 20° , and more particularly, between 6° and 20°. In one embodiment, the angle was between 7.5° and 17.5°.
- the angle provides extra closing force, and better control to hold the wraps in contact during compression.
- the centrifugal force created by the moving elements has a part in holding the wraps in contact, and the use of the counterweight will somewhat limit that centrifugal force. As such, this angle provides additional force.
- the angle is too small, there may not be enough force, but excessive force would also be undesirable. As such, the mentioned ranges provide valuable benefits.
- FIG. 3 shows an alternative counterweight 198 , wherein the extending portion 200 and the ring 202 are generally as shown in the earlier embodiment. However, a circumferential edge 204 of the extending portion 200 is formed at an angle C relative to an upper surface of the ring portion 202 . This surface assists in directing oil flow to appropriate surfaces. In embodiments, the angle C may be between 95° and 125° , and in one embodiment was 110°.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2012100791865A CN102691663A (zh) | 2011-03-23 | 2012-03-23 | 并入到用于涡旋压缩机的滑块中的平衡重 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1152384A FR2973083B1 (fr) | 2011-03-23 | 2011-03-23 | Contrepoids incorpore dans un bloc de glissement pour compresseur a spirales |
FR11/52384 | 2011-03-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120244026A1 true US20120244026A1 (en) | 2012-09-27 |
Family
ID=44550270
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/156,606 Abandoned US20120244026A1 (en) | 2011-03-23 | 2011-06-09 | Counterweight incorporated into slider block for scroll compressor |
Country Status (2)
Country | Link |
---|---|
US (1) | US20120244026A1 (fr) |
FR (1) | FR2973083B1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019168526A1 (fr) * | 2018-02-28 | 2019-09-06 | Hitachi-Johnson Controls Air Conditioning, Inc. | Élasticité radiale dynamique dans des compresseurs à volutes |
US11028848B2 (en) * | 2016-03-30 | 2021-06-08 | Mitsubishi Electric Corporation | Scroll compressor having a fitted bushing and weight arrangement |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62271984A (ja) * | 1986-05-21 | 1987-11-26 | Hitachi Ltd | 密閉形スクロ−ル圧縮機 |
US4954057A (en) * | 1988-10-18 | 1990-09-04 | Copeland Corporation | Scroll compressor with lubricated flat driving surface |
US5199862A (en) * | 1990-07-24 | 1993-04-06 | Mitsubishi Jukogyo Kabushiki Kaisha | Scroll type fluid machinery with counter weight on drive bushing |
US6123527A (en) * | 1997-01-23 | 2000-09-26 | Mitsubishi Heavy Industries, Ltd. | Scroll hydraulic machine |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0487382U (fr) * | 1990-12-06 | 1992-07-29 | ||
JP2837019B2 (ja) * | 1992-02-27 | 1998-12-14 | 三菱重工業株式会社 | スクロール型流体機械 |
JP3105720B2 (ja) * | 1993-11-09 | 2000-11-06 | 三菱重工業株式会社 | スクロール型流体機械 |
-
2011
- 2011-03-23 FR FR1152384A patent/FR2973083B1/fr active Active
- 2011-06-09 US US13/156,606 patent/US20120244026A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62271984A (ja) * | 1986-05-21 | 1987-11-26 | Hitachi Ltd | 密閉形スクロ−ル圧縮機 |
US4954057A (en) * | 1988-10-18 | 1990-09-04 | Copeland Corporation | Scroll compressor with lubricated flat driving surface |
US5199862A (en) * | 1990-07-24 | 1993-04-06 | Mitsubishi Jukogyo Kabushiki Kaisha | Scroll type fluid machinery with counter weight on drive bushing |
US6123527A (en) * | 1997-01-23 | 2000-09-26 | Mitsubishi Heavy Industries, Ltd. | Scroll hydraulic machine |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11028848B2 (en) * | 2016-03-30 | 2021-06-08 | Mitsubishi Electric Corporation | Scroll compressor having a fitted bushing and weight arrangement |
WO2019168526A1 (fr) * | 2018-02-28 | 2019-09-06 | Hitachi-Johnson Controls Air Conditioning, Inc. | Élasticité radiale dynamique dans des compresseurs à volutes |
CN112105819A (zh) * | 2018-02-28 | 2020-12-18 | 日立江森自控空调有限公司 | 涡旋式压缩机的动态径向柔性 |
JP2021509162A (ja) * | 2018-02-28 | 2021-03-18 | 日立ジョンソンコントロールズ空調株式会社 | スクロール圧縮機における動的半径方向コンプライアンス |
US11542942B2 (en) | 2018-02-28 | 2023-01-03 | Hitachi-Johnson Controls Air Conditioning, Inc. | Dynamic radial compliance in scroll compressors |
Also Published As
Publication number | Publication date |
---|---|
FR2973083B1 (fr) | 2016-01-01 |
FR2973083A1 (fr) | 2012-09-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DANFOSS SCROLL TECHNOLOGIES LLC, ARKANSAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAHN, GREGORY W.;BONNEFOI, PATRICE;MANTRALA, RAVI;SIGNING DATES FROM 20110405 TO 20110406;REEL/FRAME:026416/0647 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |