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
  • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
  • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
  • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
  • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
  • F01C21/08—Rotary pistons
  • F01C21/0809—Construction of vanes or vane holders
• • 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
  • F04C29/02—Lubrication; Lubricant separation
• • 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
  • F04C2210/00—Fluid
  • F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
  • F05B2210/00—Working fluid
  • F05B2210/10—Kind or type
  • F05B2210/14—Refrigerants with particular properties, e.g. HFC-134a
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
  • F05B2280/00—Materials; Properties thereof
  • F05B2280/10—Inorganic materials, e.g. metals
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
  • F05B2280/00—Materials; Properties thereof
  • F05B2280/50—Intrinsic material properties or characteristics
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
  • F05C2201/00—Metals
  • F05C2201/02—Light metals
  • F05C2201/021—Aluminium
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
  • F05C2201/00—Metals
  • F05C2201/04—Heavy metals
  • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
  • F05C2201/0448—Steel
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
  • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
  • F05C2251/00—Material properties

Definitions

• the present invention relates to a rotary compressor using chlorofluorocarbon as a refrigerant, and particularly relates to a refrigerant in which 1,1,1,1,2-tetrafluoroethylene is used.
• R134a relates to a rotary compressor that uses refrigeration oil as a polyol ester oil to suppress friction of sliding members of the compressor and generation of oil sludge due to hydrolysis of the oil.
• Refrigerators, vending machines and compressors for showcases have conventionally used a large amount of dichlorodifluoromethane (hereinafter referred to as R12) as a refrigerant.
• R12 dichlorodifluoromethane
• This R12 is subject to freon regulation due to the problem of depletion of the ozone layer.
• R134a has been studied for use in refrigerators (see, for example, Japanese Patent Application Laid-Open No. 11-271911).
• the refrigerant R1 34a has poor compatibility with the currently used refrigerating machine oils such as mineral oil and alkylbenzene oil, and deteriorates the return of the oil to the compressor and the refrigerant separated from the oil at the time of stagnation start. There were problems ranging from pumping up to poor lubrication of the compressor.
• the present inventors have studied a polyol ester-based oil as a refrigerating machine oil compatible with the R134a refrigerant.
• this polyol ester oil is used in a rotary compressor, it is subject to dynamic friction, especially in line contact between the vane and the roller.
• the fatty acid generated by hydrolysis by heat causes corrosion of the driving member and causes abrasion.
• the durability of the compressor was impaired, for example, the abrasion powder adversely affected organic materials such as magnet wires of electric components of the compressor.
• the inventors of the present invention have conducted repeated studies to combine a refrigerant of R134a and a refrigerating machine oil of a polyol ester type oil for use in a recuperation type compressor.
• the frictional heat of the member causes hydrolysis of the polyol ester-based oil that lubricates the sliding member, and the generated fatty acid corrodes the sliding member, thereby reducing the frictional heat generated by the sliding member.
• the inventors have found that hydrolysis of a polyol ester-based oil can be suppressed, and have completed the present invention.
• the present invention solves the above-described problems, and reduces the frictional heat of a sliding member when a polyol ester oil compatible with a refrigerant of R134a is used as a refrigerating machine oil.
• the purpose is to suppress hydrolysis of the polyol ester-based oil due to this heat.
• the present invention relates to a rotary compressor in which a rotary compression element including a sliding member such as a vane roller is housed in an airtight container, wherein 1,1,1,1,2-tetrafluoroethyl is used as a refrigerant compressed by the rotary compression element.
• a polyol ester oil composed of a polyhydric alcohol and a fatty acid is used as an oil, which is compatible with the refrigerant and slides on the sliding member of the rotary compression element.
• the vane of the driving member of the rotary compression element is made of a material having a hardness higher than that of a roller.
• the vane of the sliding member of the rotary compression element is an aluminum-based composite material containing a reinforcing material such as carbon.
• the vane of the sliding member of the rotary compression element is made of reinforced plastic.
• the present invention suppresses the temperature of the frictional heat of the driving member which is lubricated with the polyol ester oil compatible with the refrigerant of R134a, thereby reducing the polyol friction. Ester oil is difficult to be hydrolyzed.
• FIG. 1 is a longitudinal sectional view of a rotary compressor showing one embodiment of the present invention.
• FIG. 2 is a cross-sectional view of the rotary compressor of the present invention.
• FIG. 3 is a plan view of an Amsler-type testing machine.
• FIG. 1 is a longitudinal sectional view of a rotary compressor.
• FIG. 2 is a cross-sectional view of the rotary compressor of FIG. 1 taken along line AA.
• reference numeral 1 denotes a closed container, in which a motorized element 2 is driven on the upper side and a motorized element is driven on the lower side.
• Rotating compression elements 3 are housed respectively.
• the electric element 2 is composed of a stator 5 having a winding 4 insulated with an organic material and a rotor 6 provided inside the stator.
• the rotary compression element 3 includes a cylinder 7, a roller 10 that is rotated along the inner wall of the cylinder 7 by an eccentric portion 9 of the rotation ⁇ 8, and a pressure side of the roller that is in pressure contact with the peripheral surface of the cylinder 7. And the discharge side of the spring 11 and the vane 12 which is pressed by the high-pressure refrigerant and the opening of the cylinder 7 and the upper part which supports the rotating shaft 8 It consists of a bearing 13 and a lower bearing 14.
• the upper bearing 13 is provided with a discharge hole 15 communicating with the discharge side of the cylinder 7.
• the upper bearing 13 is provided with a discharge valve 16 that opens and closes the discharge hole 15 and a discharge muffler 17 that covers the discharge valve.
• Vane 12 is formed of a composite aluminum material in which molten aluminum alloy material is impregnated into a carbon powder.
• the aperture 10 is made of an iron-based alloy or an aluminum material whose surface is anodized.
• the vane 12 is made of a carbon material having a melting point higher than that of the roller 10 and is made of a hard material so that the temperature of cohesive wear with the roller 10 is increased. That is, the vane 12 of the composite aluminum material is hardly worn even when it is in line contact with the roller 10, so that the promotion of abrasion due to abrasion powder is suppressed, and the frictional heat of friction is reduced.
• Vane 12 is made of refrigerant-resistant plastic material. May be. This plastic material is formed from engineering plastics such as polyether ether ketone, polyimide, polyamide imide, polyphenylene sulfide, aromatic polyester, polyether sulfone, polyether imide, etc. I have.
• the roller 10 is formed of an iron-based material.
• the plastic vane 12 has a higher melting point than the iron-based roller 10 and contains a hard material such as carbon so that the wear resistance can be improved.
• polyol ester oil oil 18 is stored at the bottom of the hermetically sealed container. This oil lubricates the sliding surfaces of the roller 10 and the vane 12 which are the driving members of the rotary compression element 3.
• the refrigerant that flows into the cylinder 7 of the rotary compression element 3 and is compressed by the cooperation of the rollers 10 and the vanes 12 is compatible with the polyol ester oil 18. 4a is used.
• Reference numeral 19 denotes a suction pipe attached to the closed container 1, and this suction pipe guides the refrigerant to the suction side of the cylinder. 2 0
• the rotary this discharge pipe configured Ni would Yo this c are ejected compressed by rotary compression elements 3 refrigerant in the sealed container 1 outside In the compressor, the suction pipe 1
• the refrigerant of R134a flowing from 9 into the suction side of the cylinder 7 is compressed by the cooperation of the rollers 10 and the vanes 12 and opens the discharge valve 16 to discharge from the discharge holes 15 Discharged into muffler 17.
• the refrigerant in this discharge muffler is discharged through the discharge pipe via the electric element 2. 20 force, is discharged out of the closed container 1.
• the oil layer 18 is provided on the sliding surfaces of the sliding member such as the roller 10 and the vane 12 of the rotary compression element 3 to perform lubrication. Further, the refrigerant compressed in the cylinder 7 is prevented from leaking to the low pressure side via the driving surface.
• the roller 10 and the vane 12 that divide the inside of the cylinder 7 into the suction side and the discharge side form the roller with an iron-based material and the vane with a composite aluminum material containing carbon.
• the adhesive wear temperature increases, and the frictional heat generated by pressing the tip of the vane 12 against the peripheral surface of the roller 10 with the spring 11 and the internal high pressure can be reduced. I have. Therefore, even if a polyol ester oil is used, the oil 18 supplied to the contact surface between the roller 10 and the vane 12 can suppress hydrolysis of the ester oil and prevent corrosion of the driving member.
• Reference numeral 22 denotes a rotating piece corresponding to a roller, and the rotating piece is rotated for 20 hours while supplying a polyester oil 23 to a press contact portion with the fixed piece 21.
• the refrigerant compressed by the rotary compression element is 1 Polyester composed of polyhydric alcohol and fatty acid, using 1,1,1,2-tetrafluoroethane as an oil that is compatible with this coolant and lubricates the sliding member of the I ⁇ rolling element.
• the driving oil vane of the rotary compression element is made of a material having a hardness higher than that of the roller using a base oil, the adhesive wear temperature at the contact surface between the vane and the roller is increased to increase the frictional heat. Is suppressed, and the polyol ester oil, which is compatible with the 1,1,1,1,2-tetrafluoroethane refrigerant, is hydrolyzed by this heat. Rot Prevents erosion and wear

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Applications Or Details Of Rotary Compressors (AREA)

Priority Applications (3)

Applications Claiming Priority (4)

Publications (1)

Family

ID=26423462

Family Applications (1)

Country Status (4)

Cited By (3)

Families Citing this family (10)

Citations (4)

Family Cites Families (3)

• 1992
  • 1992-04-13 DE DE69216337T patent/DE69216337T2/de not_active Expired - Fee Related
  • 1992-04-13 EP EP92908527A patent/EP0533957B1/de not_active Expired - Lifetime
  • 1992-04-13 WO PCT/JP1992/000461 patent/WO1992018772A1/ja active IP Right Grant
  • 1992-04-13 KR KR1019920703223A patent/KR0180894B1/ko not_active IP Right Cessation

Patent Citations (4)

Non-Patent Citations (1)

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