EP0854286A2 - Taumelscheibenverdichter - Google Patents

Taumelscheibenverdichter Download PDF

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Publication number
EP0854286A2
EP0854286A2 EP98300233A EP98300233A EP0854286A2 EP 0854286 A2 EP0854286 A2 EP 0854286A2 EP 98300233 A EP98300233 A EP 98300233A EP 98300233 A EP98300233 A EP 98300233A EP 0854286 A2 EP0854286 A2 EP 0854286A2
Authority
EP
European Patent Office
Prior art keywords
swash plate
shoes
sliding surfaces
pair
treatment coating
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Withdrawn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
EP98300233A
Other languages
English (en)
French (fr)
Other versions
EP0854286A3 (de
Inventor
Katsuhiko C/O Zexel Corporation Arai
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.)
Bosch Corp
Original Assignee
Zexel 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 Zexel Corp filed Critical Zexel Corp
Publication of EP0854286A2 publication Critical patent/EP0854286A2/de
Publication of EP0854286A3 publication Critical patent/EP0854286A3/de
Withdrawn legal-status Critical Current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
    • 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
    • F04B27/1054—Actuating elements
    • 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
    • F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
    • F04B27/0878—Pistons
    • F04B27/0886—Piston shoes
    • 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
    • F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
    • F04B27/0878—Pistons
    • F04B27/0882—Pistons piston shoe retaining means
    • 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
    • F04B27/1045—Cylinders
    • 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
    • F04B27/109—Lubrication
    • 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
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0804—Non-oxide ceramics
    • F05C2203/0856—Sulfides
    • F05C2203/086—Sulfides of molybdenum
    • 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
    • F05C2251/14—Self lubricating materials; Solid lubricants
    • 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
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/12—Coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

Definitions

  • This invention relates to a swash plate compressor in which each piston is assembled with a swash plate via shoes.
  • a swash plate compressor in general, includes a drive shaft, a swash plate rotating as the drive shaft rotates, and a plurality of pistons each of which is connected to the swash plate via a pair of shoes performing relative rotation on sliding surfaces of the swash plate, respectively, with respect to the swash plate, and reciprocates within a cylinder bore as the swash plate rotates.
  • Torque of an engine installed on an automotive vehicle is transmitted to the drive shaft to rotate the same.
  • Torque of the drive shaft is transmitted to the swash plate to cause rotation of the swash plate.
  • each pair of shoes perform relative rotation on the sliding surfaces of the swash plate, whereby torque transmitted from the swash plate is converted into reciprocating motion of the piston.
  • the piston reciprocates within the cylinder bore, the volume of a compression chamber within the cylinder bore changes, whereby suction, compression and delivery of refrigerant gas are carried out sequentially.
  • the conventional swash plate compressor when pistons are assembled with a swash plate, it is required to select a seemingly suitable pair of shoes out of various types of shoes different in thickness, actually assemble the selected pair of shoes with the piston and the swash plate, and then measure an actual gap (shoe gap) between each sliding surface of the swash plate and a corresponding one of the shoes.
  • the adjustment work of setting the shoe gap to a proper value is carried out repeating the above assembly procedure until the measured shoe gap becomes equal to the proper value.
  • shoe gaps are really troublesome to carry out, so that it takes a lot of time to obtain proper or suitable shoe gaps.
  • the need to adjust shoe gaps is one of the factors which make the assemblage of swash plate compressors an effort-demanding and time-consuming work.
  • the present invention provides a swash plate compressor including a drive shaft, a swash plate having a base material and opposite sliding surfaces and rotating as the drive shaft rotates, a cylinder block formed therethrough with a plurality of cylinder bores, and a plurality of pistons each of which is connected to the swash plate via a pair of shoes performing relative rotation on the opposite sliding surfaces of the swash plate, respectively, with respect to the swash plate, and reciprocates within a corresponding one of the cylinder bores as the swash plate rotates.
  • the swash plate compressor according to the invention is characterized in that the opposite sliding surfaces of the swash plate are each coated with a surface-treatment coating having a thickness which is set in a manner such that when the swash plate is assembled with the each of the pistons via the pair of shoes, pressure is applied from the pair of shoes on the sliding surface of the swash plate, and when initial abrasion of the surface-treatment coating is completed, the base material of the swash plate is not exposed.
  • the swash plate compressor of the invention proper shoe gaps between the sliding surfaces of the swash plate and the shoes can be obtained after initial abrasion of the surface-treatment coatings covering the sliding surfaces of the swash plate, so that it is possible to dispense with the adjustment work for setting each shoe gap to a suitable value, which contributes to reduction of time required for assemblage of the compressor.
  • the thickness of the surface-treatment coating is set to such a value that a shoe gap between each shoe of the pair of shoes and a corresponding one of the opposite sliding surfaces of the swash plate assumes a minus value when the swash plate is assembled with the each of the pistons via the pair of shoes, and becomes equal to zero when the initial abrasion of the surface-treatment coating is completed.
  • the surface-treatment coating is formed of a solid lubricant.
  • the solid lubricant is molybdenum disulfide.
  • FIG. 1 there is shown the whole arrangement of a variable capacity swash plate compressor according to an embodiment of the invention.
  • the variable capacity swash plate compressor has a cylinder block 1 having one end thereof secured to a rear head 3 via a valve plate 2 and the other end thereof secured to a front head 4.
  • the cylinder block 1 has a plurality of cylinder bores 6 formed therethrough at predetermined circumferential intervals about a drive shaft 5.
  • Each cylinder bore 6 has a piston 7 slidably received therein.
  • crankcase 8 Within the front head 4, there is formed a crankcase 8.
  • the crankcase 8 has a swash plate 10 received therein.
  • the swash plate 10 is slidably and tiltably fitted on the drive shaft 5.
  • the swash plate 10 is connected to the piston 7 via a pair of hemispherical shoes 50.
  • the shoes 50 are held at one end 7a of the piston 7 such that they can perform relative rotation on front-side and rear-side sliding surfaces 10c, 10a of the swash plate 10, respectively, with respect to the swash plate 10.
  • the rear head 3 there are formed a discharge chamber 12 and a suction chamber 13 surrounding the discharge chamber 12. Further, the rear head 3 has a suction port 3a communicating between a refrigerant outlet port, not shown, of an evaporator, not shown.
  • the drive shaft 5 has a thrust flange 40 rigidly fitted on a front-side portion thereof for transmitting torque of the drive shaft 5 to the swash plate 10.
  • the thrust flange 40 is rotatably supported on an inner wall of the front head 4 by a thrust bearing 33.
  • the thrust flange 40 and the swash plate 10 are connected with each other via a linkage 41.
  • the swash plate 10 can tilt with respect to a plane perpendicular to the drive shaft 5.
  • the sliding surfaces 10a, 10c of the swash plate 10 are each coated with a surface-treatment coating formed of a soft material such as molybdenum disulfide (MoS 2 ).
  • the surface-treatment coating has a thickness which is set such that when the swash plate 10 is assembled with the pistons via the pair of shoes 50, pressure is applied from the pair of shoes on the sliding surfaces 10a, 10c of the swash plate, or assemblage of the swash plate 10 with the piston 7 is effected in a slightly press-fitted manner, (i.e.
  • each of the shoe gaps between the pair of shoes 50 and the sliding surfaces 10a, 10c of the swash plate 10 assumes a minus value), and a base material of the swash plate 10 is not exposed when initial abrasion of the surface-treatment coating is terminated.
  • each of the surface-treatment coatings covering the sliding surfaces 10a, 10c is reduced in thickness by 5 ⁇ m due to initial abrasion thereof, so that to prevent the base material of the swash plate 10 from being exposed, it is required that the surface-treatment coatings each have a thickness of at least 6 ⁇ m, and that shoe gaps (clearances between the shoes 50 and the sliding surfaces 10a, 10c of the swash plate 10) each assume a minus value such that the swash plate 10 is assembled with the piston 7 in a slightly press-fitted manner.
  • FIG. 2 shows the relationship between depth of wear of the surface-treatment coating covering the sliding surface of the swash plate and a total time period over which the compressor has been in operation.
  • the sliding surfaces 10a, 10c of the swash plate 10 are each coated with a surface-treatment coating having a thickness of at least 6 ⁇ m such that each of the shoe gaps can be set to a minus value, so that the shoe gaps are not proper ones before the compressor is initially put into operation.
  • the depth of wear of the surface-treatment coating continues to increase sharply after the start of initial operation of the compressor until approximately 100 to 150 hours have elapsed. Then, the depth of wear gently increases until approximately 300 hours have elapsed since the start of the initial operation of the compressor, but thereafter, the depth of wear hardly increases. That is, the surface-treatment coating is reduced in thickness by abrasion by approximately 5 ⁇ m in 300 hours after the compressor was initially put into operation, and then the abrasion substantially ceases. Thereafter, there is no sharp increase of the shoe gap between each of the shoes 50 and the sliding surface 10a(10c) of the swash plate 10.
  • the sliding surfaces 10a, 10c of the swash plate 10 are each coated with a surface-treatment coating having a thickness of e.g. 6 ⁇ m, and shoe gaps are each set to a value of e.g. -10 ⁇ m before the start of the initial operation of the compressor, the surface-treatment coatings are each reduced in thickness by abrasion by approximately 5 ⁇ m in approximately 300 hours after the start of the initial operation of the compressor, whereby the shoe gaps are each decreased to approximately 0 ⁇ m (the compressor can be operated with the shoe gaps equal to or larger than -15 ⁇ m). The shoe gaps are held at 0 ⁇ m after 300 hours have elapsed since the start of the initial operation of the compressor.
  • variable capacity swash plate compressor constructed as above
  • Torque of an engine, not shown, installed on an automotive vehicle, not shown, is transmitted to the drive shaft 5 to rotate the same.
  • Torque of the drive shaft 5 is transmitted to the swash plate 10 via the thrust flange 40 and the linkage 41 to cause rotation of the swash plate 10.
  • the rotation of the swash plate 10 causes relative rotation of the shoes 50, 50 on the sliding surfaces 10a, 10c of the swash plate 10 with respect to the swash plate 10, whereby the torque transmitted from the swash plate 10 is converted into reciprocating motion of the piston 7.
  • the piston 7 reciprocates within the cylinder bore 6, the volume of a compression chamber 29 within the cylinder bore 6 changes.
  • suction, compression and delivery of refrigerant gas are sequentially carried out in the compression chamber 29, whereby high-pressure refrigerant gas is delivered from the compression chamber 29 in an amount corresponding to an inclination of the swash plate 10.
  • the suction valve 21 opens to draw low-pressure refrigerant gas from the suction chamber 13 into the compression chamber 29 within the cylinder bore 6.
  • the discharge valve 17 opens to deliver high-pressure refrigerant gas from the compression chamber 29 to the discharge chamber 12.
  • the surface-treatment coatings covering the sliding surfaces 10a, 10c of the swash plate 10 are abraded as the swash plate compressor continues to be in operation, and when the abrasion ceases, proper or suitable shoe gaps are obtained. Therefore, when the swash plate compressor is assembled, a shoe gap-adjusting step can be dispensed with, which contributes to reduction of time required for assemblage of the compressor. That is, it is not required to repeatedly carry out the adjustment work of setting a shoe gap by selecting a seemingly suitable pair of shoes out of various types of shoes different in thickness, actually assembling the selected pair with a piston and a swash plate, and then measuring actual shoe gaps between the shoes and the sliding surfaces of the swash plate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP98300233A 1997-01-17 1998-01-14 Taumelscheibenverdichter Withdrawn EP0854286A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP19737/97 1997-01-17
JP9019737A JPH10196527A (ja) 1997-01-17 1997-01-17 斜板式圧縮機

Publications (2)

Publication Number Publication Date
EP0854286A2 true EP0854286A2 (de) 1998-07-22
EP0854286A3 EP0854286A3 (de) 1999-04-07

Family

ID=12007656

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98300233A Withdrawn EP0854286A3 (de) 1997-01-17 1998-01-14 Taumelscheibenverdichter

Country Status (3)

Country Link
EP (1) EP0854286A3 (de)
JP (1) JPH10196527A (de)
KR (1) KR100274967B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1010771A1 (de) * 1998-12-17 2000-06-21 Taiho Kogyo Co., Ltd. Taumelscheibe für Taumelscheibenkomprossor
US6543333B2 (en) 2001-06-01 2003-04-08 Visteon Global Technologies, Inc. Enriched cobalt-tin swashplate coating alloy

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE533360C (de) * 1931-09-12 Lorenz Petersen Dipl Ing Gelenkige Lagerung von Taumel- oder Wackelscheiben in den Kolben von Kompressoren
US4683803A (en) * 1986-01-13 1987-08-04 General Motors Corporation Swash plate compressor having integral shoe and ball
JPH03189377A (ja) * 1989-12-18 1991-08-19 Hitachi Ltd 斜板式圧縮機
US5056417A (en) * 1988-11-11 1991-10-15 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Swash plate type compressor having a surface coating layer on the surface of swash plate
EP0631052A1 (de) * 1993-06-08 1994-12-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Kompresseur mit Wellenplatte
US5380167A (en) * 1994-02-22 1995-01-10 General Motors Corporation Swash plate compressor with unitary bearing mechanism

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE533360C (de) * 1931-09-12 Lorenz Petersen Dipl Ing Gelenkige Lagerung von Taumel- oder Wackelscheiben in den Kolben von Kompressoren
US4683803A (en) * 1986-01-13 1987-08-04 General Motors Corporation Swash plate compressor having integral shoe and ball
US5056417A (en) * 1988-11-11 1991-10-15 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Swash plate type compressor having a surface coating layer on the surface of swash plate
JPH03189377A (ja) * 1989-12-18 1991-08-19 Hitachi Ltd 斜板式圧縮機
EP0631052A1 (de) * 1993-06-08 1994-12-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Kompresseur mit Wellenplatte
US5380167A (en) * 1994-02-22 1995-01-10 General Motors Corporation Swash plate compressor with unitary bearing mechanism

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 015, no. 447 (M-1179), 14 November 1991 & JP 03 189377 A (HITACHI LTD), 19 August 1991 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1010771A1 (de) * 1998-12-17 2000-06-21 Taiho Kogyo Co., Ltd. Taumelscheibe für Taumelscheibenkomprossor
US6337141B1 (en) 1998-12-17 2002-01-08 Taiho Kogyo Co., Ltd. Swash-plate of swash-plate type compressor
US6543333B2 (en) 2001-06-01 2003-04-08 Visteon Global Technologies, Inc. Enriched cobalt-tin swashplate coating alloy

Also Published As

Publication number Publication date
KR100274967B1 (ko) 2001-01-15
EP0854286A3 (de) 1999-04-07
KR19980070587A (ko) 1998-10-26
JPH10196527A (ja) 1998-07-31

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