US20060162546A1 - Sealing member of a compressor - Google Patents
Sealing member of a compressor Download PDFInfo
- Publication number
- US20060162546A1 US20060162546A1 US11/038,419 US3841905A US2006162546A1 US 20060162546 A1 US20060162546 A1 US 20060162546A1 US 3841905 A US3841905 A US 3841905A US 2006162546 A1 US2006162546 A1 US 2006162546A1
- Authority
- US
- United States
- Prior art keywords
- sealing member
- compressor
- coat
- rotating shaft
- coolant gas
- 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
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1036—Component parts, details, e.g. sealings, lubrication
-
- 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
- F04C2230/00—Manufacture
- F04C2230/90—Improving properties of machine parts
- F04C2230/91—Coating
Abstract
A coat of material impermeable to coolant gas is formed on the surface of a sealing member of a compressor for absorbing and compressing the coolant gas.
Description
- The present invention relates to a sealing member of a compressor for absorbing and compressing coolant gas.
- Japanese Patent Laid-Open Publication No. 2003-246976 discloses a sealing member of a carbon dioxide compressor excellent in impermeability to carbon dioxide.
- The prior art disclosed in Japanese Patent Laid-Open Publication No. 2003-246976 provides a sealing member of a compressor suitable for use with a specific coolant gas and does not provide a sealing member of a compressor suitable for use with various kinds of coolant gases.
- An object of the present invention is to provide a sealing member of a compressor suitable for use with various kinds of coolant gases.
- In accordance with the present invention, there is provided a sealing member of a compressor for absorbing and compressing coolant gas, wherein a coat of material impermeable to coolant gas is formed on the surface of the sealing member.
- A sealing member provided with a coat of material impermeable to coolant gas formed on the surface thereof, can be used in compressors for various kinds of coolant gases.
- A coat of soft metal, ceramic, amorphous hard carbon or high polymer material such as polyethylene, polytetrafluoroethylene, or the like is highly impermeable to any kind of coolant gas. Each of the materials has a specific character. Therefore, the most suitable material is desired to be used for the coat considering the working environment of the compressor, working environment of the sealing member, etc.
- In accordance with another aspect of the present invention, there is provided a compressor for absorbing and compressing coolant gas comprising a sealing member, wherein a coat of material impermeable to coolant gas is formed on the surface of the sealing member.
- When a coat of material impermeable to coolant gas is formed on the surface of the sealing member, impermeability of the sealing member is enhanced to any kind of coolant gas. Therefore, the compressor of the present invention can effectively prevent leakage of coolant gas. The compressor of the present invention can compress various kinds of coolant gases, while effectively preventing leakage of coolant gas.
- A coat of soft metal, ceramic, amorphous hard carbon or high polymer material such as polyethylene, polytetrafluoroethylene, or the like is highly impermeable to any kind of coolant gas. Each of the materials has a specific character. Therefore, the most suitable material is desirably used for the coat considering the working environment of the compressor, working environment of the sealing member, etc.
- In accordance with a preferred embodiment of the present invention, the compressor further comprises a rotating shaft, a compressing mechanism driven by the rotating shaft, a housing for accommodating the rotating shaft and the compressing mechanism, and a shaft seal member. The sealing member is the shaft seal member.
- In accordance with a preferred embodiment of the present invention, the compressor further comprises a rotating shaft, a compressing mechanism driven by the rotating shaft, and a housing for accommodating the rotating shaft and the compressing mechanism. The housing is an assembly of a plurality of partial housings. Gaskets are inserted into joints of the partial housings, and the sealing member is one of the gaskets.
- The sealing member is suitably used as a shaft seal member, a gasket, etc.
- In the drawings:
-
FIG. 1 is a sectional view of a variable delivery swash plate compressor provided with a sealing member in accordance with a preferred embodiment of the present invention. -
FIG. 2 is a fragmentary sectional view of a variable delivery swash plate compressor provided with a sealing member in accordance with a preferred embodiment of the present invention. - A variable delivery swash plate compressor provided with a sealing member in accordance with a preferred embodiment of the present invention will be described.
- As shown in
FIG. 1 , a variable delivery swash plate compressor A is provided with arotating shaft 10, arotor 11 fixed to the rotatingshaft 10 and aswash plate 12 supported by therotating shaft 10 to be variable in inclination relative to the rotatingshaft 10. Theswash plate 12 is connected to therotor 11 through alinkage 13 for allowing theswash plate 12 to vary in inclination relative to the rotatingshaft 10 and inhibiting theswash plate 12 from rotating around the rotatingshaft 10. Theswash plate 12 rotates synchronously with therotor 11 and the rotatingshaft 10. - A plurality of
pistons 15 engage theswash plate 12 through a plurality of pairs ofshoes 14 slidingly engaging the peripheral portion of theswash plate 12. Thepistons 15 are inserted incylinder bores 16 a formed in acylinder block 16. - A
front housing 18 of circular cylindrical shape forms acrank chamber 17 for accommodating the rotatingshaft 10, therotor 11 and theswash plate 12. Thefront housing 18 is closed at one end and provided with a boss 18 a at the closed end. The rotatingshaft 10 passes through the boss 18 a out of thefront housing 18 at the front end. An annular space is formed between the rotatingshaft 10 and the inner circumferential surface of the boss 18 a. - A
shaft seal 19 is disposed to seal the annular space between the rotatingshaft 10 and the inner circumferential surface of the boss 18 a. As shown inFIG. 2 , theshaft seal 19 is provided withlip seal members shaft 10 and clampingmetals lip seals lip seal 19 a disposed close to thecrank chamber 17 is a rubber molding made mainly of hydro-nitrile rubber (HNBR) and is covered by a coat of soft metal such as tin (Sn), alloy metal containing copper (Cu) and tin (Sn), alloy metal containing nickel (Ni) and tin (Sn), alloy metal containing zinc (Zn) and tin (Sn), or the like. Thelip seal 19 a is provided with a fixedportion 19 a′ clamped by theclamping metals movable portion 19 a″ slidingly contacting the circumferential side surface of the rotatingshaft 10. Thelip seal 19 b disposed close to one end of the rotatingshaft 10 projecting from thefront housing 18 is made of a synthetic resin such as polytetrafluoroethylene (PTFE). Thelip seal 19 b is provided with a fixedportion 19 b′ clamped by theclamping metals movable portion 19 b″ slidingly contacting the circumferential side surface of the rotatingshaft 10. Before theshaft seal 19 is assembled with the boss 18 a, themovable portions 19 a″ and 19 b″ extend inwardly in radial direction as indicated by phantom lines inFIG. 2 . After theshaft seal 19 has been assembled with the boss 18 a, themovable portions 19 a″ and 19 b″ are forced against the circumferential side surface of the rotatingshaft 10 to slidingly contact the circumferential side surface, thereby sealing the annular space between the rotatingshaft 10 and the inner circumferential surface of the boss 18 a. - As shown in
FIG. 1 , anelectromagnetic clutch 20 mounted on the boss 18 a of thefront housing 18 transfers rotating force from external power source not shown in the figures to the front end of the rotatingshaft 10. - A
cylinder head 21 forming aninlet chamber 21 a and anoutlet chamber 21 b is installed. - A
valve plate 22 provided withinlet holes 22 a andoutlet holes 22 b is disposed between thecylinder block 16 and thecylinder head 21. Theinlet holes 22 a and theoutlet holes 22 b communicate with thecylinder bores 16 a. - The
front housing 18, thecylinder block 16, thevalve plate 22 and thecylinder head 21 are assembled in a unit bybolts 23. - A
gasket 24 is inserted into the joint between thefront housing 18 and thecylinder block 16. Agasket 25 is inserted into the joint between thecylinder block 16 and thevalve plate 22. Agasket 26 is inserted into the joint between thevalve plate 22 and thecylinder head 21. Thegaskets - The
gaskets - The rotating
shaft 10 is rotatably supported by thefront housing 18 and thecylinder block 16. - The
rotor 11, thelinkage 13, theswash plate 12, theshoes 14 and thepistons 15 form a compressing mechanism. - The operation of the variable delivery swash plate compressor A in accordance with the present preferred embodiment will be described.
- Rotating force is transferred to the rotating
shaft 10 from the external power source not shown in the figures through theelectromagnetic clutch 20, and rotation of the rotatingshaft 10 is transferred to theswash plate 12 through therotor 11 and thelinkage 13. The rotation of theswash plate 12 causes reciprocal movement of the peripheral portion of theswash plate 12 in the longitudinal direction of therotating shaft 10. The reciprocal movement of the peripheral portion of theswash plate 12 is transferred to thepiston 15 through theshoes 14, and thepiston 15 moves reciprocally in the cylinder bore 16 a. Coolant gas enters into theinlet chamber 21 a from an external coolant circuit through an inlet port following the reciprocal movement of thepiston 15. The coolant gas is sucked into the cylinder bores 16 a through the inlet holes 22 a and inlet valves not shown in the figures to be pressurized in the cylinder bores 16 a. The pressurized coolant gas in the cylinder bores 16 a discharges into theoutlet chamber 21 b through the outlet holes 22 b and outlet valves not shown in the figures, and then discharges from theoutlet chamber 21 b into the external coolant circuit through an outlet port. - The
shaft seal 19 and thegaskets 24 to 26 prevent leakage of the coolant gas from the variable delivery swash plate compressor A. - A coat of soft metal is formed on each of the
lip seal 19 a and thegaskets 24 to 26. Therefore, they are highly impermeable to various kinds of coolant gases, such as Freon, carbon hydride, alternative Freon, carbon dioxide, ammonia, etc. Therefore, whatever kind of coolant gas is compressed by the variable delivery swash plate compressor A, leakage of the coolant gas from the variable delivery swash plate compressor A is reliably prevented. Hydro-nitrile rubber is easy to obtain because it is used as the material of sealing members of coolant gas compressors. The soft metal is suitable for use on sliding contact parts because it reduces friction resistance. - A coat of ceramic such as silicon carbide (SiC), alumina (Al2O3), silicon nitride (Si3N4), zirconia (ZrO2), etc., amorphous hard carbon (DLC), or high polymer material such as polyethylene, polytetrafluoroethylene, etc. may be formed on the surface of the
lip seal 19 a and thegaskets 24 to 26. The impermeability of the aforementioned seal members to the various coolant gases is enhanced and the ability of the coolant gas compressor to prevent leakage of coolant gas is enhanced. - Ceramic has advantages such as low apparent density, low thermal expansion coefficient, high hardness, high corrosion resistance, non-magnetism, high insulation performance, etc. Especially, silicon nitride has large flexural strength at high temperature and is suitable for use on bearings. Silicon carbide has advantages such as high hardness, large thermal conductivity, high resistance against thermal shock, etc. and is suitable for use on the shaft seal.
- Amorphous hard carbon has advantages such as high hardness, low friction coefficient, high ware resistance, high sliding ability, etc. Film thickness and surface roughness can be easily controlled when amorphous hard carbon is coated on the surface of a seal member. Therefore, finishing becomes unnecessary and coating cost decreases.
- Polyethylene has advantages such as high thermal stability, high chemical resistance, inexpensiveness, etc. Polytetrafluoroethylene has an advantage in that it decreases friction resistance and is suitable for use on sliding contact parts.
- The most suitable material is desirably used for the coat formed on the surface of a seal member considering the working environment of the compressor, working environment of the sealing member, etc.
- The present invention can be used for sealing members of any kind of coolant gas compressor.
- While the present invention has been described with reference to preferred embodiments, one of ordinary skill in the art will recognize that modifications and improvements may be made while remaining within the spirit and scope of the present invention. The scope of the invention is determined solely by the attached claims.
Claims (16)
1. A sealing member of a compressor for absorbing and compressing coolant gas, wherein a coat of material impermeable to coolant gas is formed on the surface of the sealing member.
2. A sealing member of claim 1 , wherein the material of the coat is soft metal.
3. A sealing member of claim 1 , wherein the material of the coat is ceramic.
4. A sealing member of claim 1 , wherein the material of the coat is amorphous hard carbon.
5. A sealing member of claim 1 , wherein the material of the coat is high polymer material.
6. A sealing member of claim 5 , wherein the high polymer material is polyethylene.
7. A sealing member of claim 5 , wherein the high polymer material is polytetrafluoroethylene.
8. A compressor for absorbing and compressing coolant gas comprising a sealing member, wherein a coat of material impermeable to coolant gas is formed on the surface of the sealing member.
9. A compressor of claim 8 , wherein the material of the coat is soft metal.
10. A compressor of claim 8 , wherein the material of the coat is ceramic.
11. A compressor of claim 8 , wherein the material of the coat is amorphous hard carbon.
12. A compressor of claim 8 , wherein the material of the coat is high polymer material.
13. A compressor of claim 12 , wherein the high polymer material is polyethylene.
14. A compressor of claim 12 , wherein the high polymer material is polytetrafluoroethylene.
15. A compressor of claim 8 further comprising a rotating shaft, a compressing mechanism driven by the rotating shaft, a housing for accommodating the rotating shaft and the compressing mechanism, and a shaft seal member, wherein the sealing member is the shaft seal member.
16. A compressor of claim 8 further comprising a rotating shaft, a compressing mechanism driven by the rotating shaft, and a housing for accommodating the rotating shaft and the compressing mechanism, wherein the housing is an assembly of a plurality of partial housings, gaskets are inserted into joints of the partial housings, and the sealing member is one of the gaskets.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/038,419 US20060162546A1 (en) | 2005-01-21 | 2005-01-21 | Sealing member of a compressor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/038,419 US20060162546A1 (en) | 2005-01-21 | 2005-01-21 | Sealing member of a compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060162546A1 true US20060162546A1 (en) | 2006-07-27 |
Family
ID=36695316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/038,419 Abandoned US20060162546A1 (en) | 2005-01-21 | 2005-01-21 | Sealing member of a compressor |
Country Status (1)
Country | Link |
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US (1) | US20060162546A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111433461A (en) * | 2017-12-08 | 2020-07-17 | 翰昂汽车零部件有限公司 | Electric compressor |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111433461A (en) * | 2017-12-08 | 2020-07-17 | 翰昂汽车零部件有限公司 | Electric compressor |
US11466688B2 (en) * | 2017-12-08 | 2022-10-11 | Hanon Systems | Electric compressor capable of fixing a shaft seal |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SANDEN CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HOSOI, HIDENORI;FUKUMURO, TAKASHI;REEL/FRAME:015890/0076 Effective date: 20041207 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |