EP0227880A1 - Compresseur avec plaque de butée positionnée à l'extérieur - Google Patents

Compresseur avec plaque de butée positionnée à l'extérieur Download PDF

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Publication number
EP0227880A1
EP0227880A1 EP19860108252 EP86108252A EP0227880A1 EP 0227880 A1 EP0227880 A1 EP 0227880A1 EP 19860108252 EP19860108252 EP 19860108252 EP 86108252 A EP86108252 A EP 86108252A EP 0227880 A1 EP0227880 A1 EP 0227880A1
Authority
EP
European Patent Office
Prior art keywords
compressor
crankshaft
end plate
cylinder
bearing
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Withdrawn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
EP19860108252
Other languages
German (de)
English (en)
Inventor
Mark W. Wood
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.)
Tecumseh Products Co
Original Assignee
Tecumseh Products Co
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 Tecumseh Products Co filed Critical Tecumseh Products Co
Publication of EP0227880A1 publication Critical patent/EP0227880A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F04C29/023—Lubricant distribution through a hollow driving shaft

Definitions

  • This invention relates to hermetic compressors and in particular to the construction of an outboard thrust plate for a rotary hermetic compressor.
  • the crankshaft is generally journalled in one or more bearings which may be secured to either the housing or the compressor cylinder.
  • more than one bearing is used for journalling the crankshaft, there is provided a main bearing and an outboard bearing and the cylinder is sandwiched between these two bearings.
  • the outboard bearing also serves as an end plate for sealing off the cylinder bore which forms the compression chamber.
  • a single bearing is used and an end plate is provided whose only function is to provide a end wall for the compressor cylinder bore.
  • U.S. Patent No. 2,458,018 One Example of such construction is shown in U.S. Patent No. 2,458,018.
  • the end portion of the compressor crankshaft generally includes an oil pump.
  • the end portion of the crankshaft is disposed in the compressor oil sump which is conventionally located in a bottom portion of the housing.
  • this pumping arrangement is not feasible and alternative lubricant pumping arrangements must be provided, thereby adding to the cost of the compressor.
  • hermetic rotary compressors An additional problem in hermetic rotary compressors is the provision of adequate cooling arrangements for the compressor since a great deal of heat is generated in the compressor which must be dissipated.
  • special arrangements must be provided for cooling the working parts. Generally this is accomplished by dripping or spraying lubricant over the working parts and then causing the lubricant to contact the housing shell whereby excess heat is dissipated through the housing shell.
  • Such arrangements are costly and it is therefore desired to provide an economical, compact compressor including an effective lubrication system wherein heat generated by the compressor is more readily dissipated and wherein the connection of the suction line to the compressor chamber is more easily accomplished.
  • the present invention overcomes the disadvantages of the above described hermetic rotary compressors by providing an improved hermetic rotary compressor therefor.
  • the hermetic rotary compressor of the present invention includes a bell shaped casing, an end portion of which forms the outboard or end thrust plate of the compressor.
  • the hermetic rotary compressor includes an open ended shell member, an electric motor including a rotor and a stator, a rotatable horizontal or vertical crankshaft driven by the rotor and journalled in a main bearing, a compressor cylinder including a compression chamber and means driven by the crankshaft and disposed in the compression chamber for compressing a gas therein.
  • a compressor outboard or end thrust plate is provided for supporting the compressor cylinder and forming an end wall of the housing, the end thrust plate being sealingly secured to the housing shell member.
  • the end plate includes a suction aperture which communicates with the compression chamber of the cylinder.
  • the invention eliminates the need for the conventional prior art end wall member of the compressor housing and provides a compact compressor structure since the compressor outboard thrust plate forms part of the compressor housing.
  • the compressor lubrication system is substantially simplified since it comprises a very simple arrangement of passages in existing parts of the compressor such as the crankshaft and outboard thrust plate.
  • the compressor end thrust plate also forms part of the housing, cooling of the compressor is substantially improved over conventional cooling arrangements.
  • the compressor is more compact, economical and lower in weight.
  • the invention in one form thereof, still further provides a rotary hermetic compressor comprising a horizontally disposed crankshaft, and an electric motor including a stator and a rotor with the rotor drivingly secured to the crankshaft.
  • the compressor further includes a compressor cylinder including a compressor chamber and a roller disposed in the chamber for compressing refrigerant therein. The roller is driven by the crankshaft and the crankshaft is journalled in a bearing.
  • a bell shaped housing shell having an open side encloses the motor, the bearing, the compressor cylinder and the roller.
  • An end wall is provided for forming a closure member for the shell, the end wall being sealingly secured to the shell.
  • a still further object of the invention is to provide a simplified lubrication arrangement for a compressor.
  • An additional object of the present invention is to provide an effectively cooled hermetic compressor.
  • a compressor assembly 10 including a housing bell or shell 12 having a cylindrical portion 14 and an end bell portion 16. Cylindrical portion 14 and end bell portion 16 are sealingly secured to each other such as by welding. A pair of mounting brackets 15 is provided for mounting the compressor.
  • An electric motor 18 is disposed inside housing bell 12 and includes a stator 20 having a stack of stator laminations 22 and stator windings 24. Stator 20 is secured to housing shell 12 in any convenient manner such as by an interference fit . Stator 20 includes two flat portions on its circumference whereby clearance is provided between a portion of stator lamination stack 22 at 23 and housing shell 12 as shown in Fig. 1.
  • An electrical connector 25 is secured to shell end portion 16 for connection to a source of electrical supply.
  • the rotor of the electric motor 26 is provided with a counterweight 28 for balancing the rotor and crankshaft 30 which includes an eccentric portion 31.
  • Crankshaft 30, as best seen in Fig. 3, also includes a portion 40 which is secured inside a bore 41 of rotor 26 such as by press fitting or the like.
  • Crankshaft 30 also includes two bearing portions 42a and 42b and an undercut portion 46.
  • Bearing portion 42a is provided with a helical passageway in its outer surface for lubrication purposes as further explained hereinafter.
  • crankshaft 30 While in the illustrated preferred embodiment an undercut portion 46 is provided in crankshaft 30, this undercut portion 46 could be eliminated so that helical passageway 44 could be extended to run the length of portions 42a and 46.
  • Crankshaft 30 also includes an end thrust bearing surface 50 on eccentric 31. Eccentric 31 is provided with an oil groove 52. Bearing portion 42b is provided with an oil groove 54.
  • Crankshaft 30 also includes an axial bore 56 which communicates with a radial oil passage 58 in portion 46.
  • a bearing 64 is provided for journalling crankshaft 30.
  • Undercut portion 46 of crankshaft 30 forms an annular chamber 66 with bearing 64 whereby a continuous lubrication circuit is provided from axial bore 56 through radial passage 58 and annular chamber 66 to helical passageway 44..
  • refrigerant or another suitable gas flows through suction tube 88 and aperture 90 into compression chamber 70 to be compressed therein by means of the operation of roller 72 and the sliding vane (not shown), whereafter the compressed gas is discharged via a discharge valve (not shown) into discharge muffler 94. From discharge muffler 94 the gas passes through apertures . 92 into the compressor housing. The compressed refrigerant will flow out of housing 10 through discharge tube 84 to the condenser of a refrigeration circuit in a conventional manner.
  • end plate 80 also includes a radial passage 100 and two axial passages 102 and 104.
  • Axial passage 102 is aligned with axial bore 56.
  • Axial passage 104 communicates with oil sump 106 in the bottom portion of housing bell 12 by means of an axial passage 106 in.cylinder 68. Therefore, in operation, as crankshaft 30 is rotated by motor 18, oil is drawn upwardly from sump 106, due to the suction pressure generated by the rotation of helical oil groove 44 in crankshaft 30. Oil flows through axial passage 104, radial passage 100, axial passage 102, axial bore 56, and radial passage 58 to annular chamber 66, whereby the bearings of crankshaft 30 will be lubricated.
  • End thrust plate 80 is preferably constructed of a weldable material such as steel whereby the end plate will not be distorted as suction tube 88 is forced into suction aperture 90 or as end plate 80 is welded to housing bell 12.
  • the thrust bearing surface 50 of crankshaft 30 bears against the end thrust plate 80 for bearing support thereby.
  • compressor cylinder 68 is in intimate contact with end plate 80, and since end plate 80 is exposed to the ambient air, cooling of the compressor is substantially improved over conventional designs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
EP19860108252 1985-10-25 1986-06-18 Compresseur avec plaque de butée positionnée à l'extérieur Withdrawn EP0227880A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US79132585A 1985-10-25 1985-10-25
US791325 1985-10-25

Publications (1)

Publication Number Publication Date
EP0227880A1 true EP0227880A1 (fr) 1987-07-08

Family

ID=25153370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860108252 Withdrawn EP0227880A1 (fr) 1985-10-25 1986-06-18 Compresseur avec plaque de butée positionnée à l'extérieur

Country Status (5)

Country Link
EP (1) EP0227880A1 (fr)
JP (1) JPS62101897A (fr)
CN (1) CN1003726B (fr)
AU (1) AU568983B2 (fr)
BR (1) BR8603503A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015172895A1 (fr) * 2014-05-16 2015-11-19 Danfoss Commercial Compressors Compresseur à spirale
US9587638B2 (en) 2011-03-31 2017-03-07 Magna Powertrain Bad Homburg GmbH Drive unit for a submersible oil pump, with a fluid passage allowing the fluid in the motor housing to be discharged to the ambient enviroment
DE102019200560A1 (de) * 2018-09-14 2020-03-19 Magna Powertrain Bad Homburg GmbH Gerotorpumpe und Verfahren zur Herstellung eines Druckausgleichs in einer Gerotorpumpe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2708785B2 (ja) * 1988-06-22 1998-02-04 三菱電機株式会社 密閉形電動圧縮機

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1925166A (en) * 1930-08-21 1933-09-05 Climax Engineering Company Compression unit for refrigerating systems
DE822393C (de) * 1948-10-02 1951-11-26 Siemens Schuckertwerke A G Gekapselte Verdichtungskaeltemaschine
US2598216A (en) * 1952-05-27 Bousky
US2612311A (en) * 1949-01-26 1952-09-30 Borg Warner Compressor-motor assembly
DE1057282B (de) * 1956-04-16 1959-05-14 Gen Electric Einrichtung zur Schmierung und Abdichtung eines hermetisch abgedichteten Drehkolbenverdichters
DE1403016A1 (de) * 1959-07-11 1970-02-05 Bbc Brown Boveri & Cie Gekapselter Motorverdichter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6088888A (ja) * 1983-10-20 1985-05-18 Mitsubishi Electric Corp 回転式圧縮機のストレ−ナ装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2598216A (en) * 1952-05-27 Bousky
US1925166A (en) * 1930-08-21 1933-09-05 Climax Engineering Company Compression unit for refrigerating systems
DE822393C (de) * 1948-10-02 1951-11-26 Siemens Schuckertwerke A G Gekapselte Verdichtungskaeltemaschine
US2612311A (en) * 1949-01-26 1952-09-30 Borg Warner Compressor-motor assembly
DE1057282B (de) * 1956-04-16 1959-05-14 Gen Electric Einrichtung zur Schmierung und Abdichtung eines hermetisch abgedichteten Drehkolbenverdichters
DE1403016A1 (de) * 1959-07-11 1970-02-05 Bbc Brown Boveri & Cie Gekapselter Motorverdichter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9587638B2 (en) 2011-03-31 2017-03-07 Magna Powertrain Bad Homburg GmbH Drive unit for a submersible oil pump, with a fluid passage allowing the fluid in the motor housing to be discharged to the ambient enviroment
WO2015172895A1 (fr) * 2014-05-16 2015-11-19 Danfoss Commercial Compressors Compresseur à spirale
FR3021075A1 (fr) * 2014-05-16 2015-11-20 Danfoss Commercial Compressors
US10294943B2 (en) 2014-05-16 2019-05-21 Danfoss Commercial Compressors Scroll compressor with a lubrication arrangement
DE102019200560A1 (de) * 2018-09-14 2020-03-19 Magna Powertrain Bad Homburg GmbH Gerotorpumpe und Verfahren zur Herstellung eines Druckausgleichs in einer Gerotorpumpe

Also Published As

Publication number Publication date
BR8603503A (pt) 1987-06-02
CN1003726B (zh) 1989-03-29
JPS62101897A (ja) 1987-05-12
CN86105344A (zh) 1987-04-29
AU568983B2 (en) 1988-01-14
AU5899086A (en) 1987-04-30

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Inventor name: WOOD, MARK W.