US3804202A - Compressor lubrication system - Google Patents

Compressor lubrication system Download PDF

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Publication number
US3804202A
US3804202A US00277323A US27732372A US3804202A US 3804202 A US3804202 A US 3804202A US 00277323 A US00277323 A US 00277323A US 27732372 A US27732372 A US 27732372A US 3804202 A US3804202 A US 3804202A
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US
United States
Prior art keywords
oil
passage
outlet
inlet
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.)
Expired - Lifetime
Application number
US00277323A
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English (en)
Inventor
L Funke
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.)
Whirlpool Corp
Original Assignee
Whirlpool 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 Whirlpool Corp filed Critical Whirlpool Corp
Priority to US00277323A priority Critical patent/US3804202A/en
Priority to CA167,137A priority patent/CA991425A/en
Priority to AU55876/73A priority patent/AU469326B2/en
Priority to BR5818/73A priority patent/BR7305818D0/pt
Priority to JP48085914A priority patent/JPS5223401B2/ja
Application granted granted Critical
Publication of US3804202A publication Critical patent/US3804202A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F04B39/023—Hermetic compressors
    • F04B39/0238—Hermetic compressors with oil distribution channels
    • F04B39/0246—Hermetic compressors with oil distribution channels in the rotating shaft

Definitions

  • ABSTRACT A rotary compressor having improved means for re- 52 us. c1 184/6.16, 184/618, 417/372 moving gasses from the lubricating Oil to prevent scor- 51 1m. (:1. F04b 17/00, FO4b 39/02, FOlm 1/00 s and gallihg 9f the rotor bearmgs The g [58] Field of Search 184/616, 6.18, 6.23; removing means Separates the bulk of any s carried 417/372, 418/91, 97, 99 in the lubricating oil prior to the delivery thereof to the bearings.
  • a supplemental gas-removing means is 5 References Cited provided for removing further gas developed in the oil UNITED STATES PATENTS by vaporization of the gas-forming liquid in the oil as 2 738 919 3/1956 R h t 1 417/372 an incident of heating thereof by the relatively high use 1: a. 3,285,504 11/1966 Smith 1. 417/372 temperature bearmgs' 3,182,901 5/1965 Solomon 417/372 10 Claims, 3 Drawing Figures BACKGROUND OF THE INVENTION 1.
  • This invention relates to compressors and in particular to rotary compressors having means for circulating oil to the bearings thereof.
  • compressor for use in compressingrefrigerant fluid in a refrigeration system
  • the refrigerant is compressed by a rotor carried on a shaft rotatably journalled in suitable bearings.
  • the rotor bearings are lubricated by a pumping system which draws the collected oil from a sump and urges it between the shaft and bearings in a recirculating manner.
  • a centrifugal pumping means is employed to'cause the oil to flow upwardly to the bearing surfaces from the collecting sump.
  • the oiland refrigerant are centrifuged by the rotary action of the rotor shaft so that the oil flows radially outwardly through a port at the upper 30 end of the delivery passage into the main bearing oil groove and the lighter refrigerant is forced inwardly through the shaft to the axis thereof and thence, outwardly to a refrigerant receiving passage opening into and means for causing separation of refrigerant gas from the lubricating oil and delivering of the separated gas to the inlet for flow through the axial passage to the outlet, the improvement comprising means for conducting refrigerant gas, separating from the oil in the oil passage means intermediate the inlet and the outlet, to the axial passage intermediate the inlet and the outlet for flow to the outlet with the refrigerant gas separated from the lubricating oil and delivered to the axial l0 passage inlet.
  • the gas-conducting means may comprise a plurality of flow passages communicating with the axial passage at axially spaced positions.
  • the bearing means may comprise different diameter bearings with a gas vent passage in the shaft communieating with the bearings at the juncture between the different diameter portions.
  • Dubberley shows the provision of a vapor relief vent at the top of the oil groove communicating with the primary refrigerant vapor relief passage.
  • the present invention comprehends an improved rotary compressor structure provided with means for removing vaporized gas from the lubricating oil from one or more intermediate portions of the bearing, i.e., between the inlet and outlet of the oil lubricating passage thereto.
  • the present invention comprehends an improved lubricating means in such a rotary compressor wherein vaporized gas is removed from the lubricating oil substantially at the portion of the system wherein it is generated to provide an improved gas lock-free lubrication of the compressor bearings.
  • the present invention comprehends the provision in such a rotary compressor having a rotor rotatably journalled in a bearing means,oil passage means for conducting lubricating oil from an inlet, between the rotor and bearing means, and to an outlet, means for causing flow of the lubricating oil through said oil passage means, an axial passage in the rotor for conducting refrigerant gas from the inlet to the outlet,
  • FIG. 2 is a'fragmentary horizontal section thereof taken substantially along the line 2--2 of FIG. 1;
  • FIG. 3 is a schematic view of the refrigeration system.
  • a compressor generally designated 10 is shown to comprise a rotary compressor having a rotor 11 including a drive shaft 12 driven by an I pressed refrigerant gas is delivered through adischarge tube 16 to a precooler 17andreturned to the housing 14 through a return tube 18,
  • the high pressure gas is then delivered through a discharge tube' 19 to a series connection of a condenser 20, a flow restricting capillary 21, and an evaporator 22 wherein the compressed refrigerant vapor expands to effect the desired cooling operation.
  • the expanded refrigerant is then delivered back to the compressor through a return tube 23 to be recompressed by the rotor 11.
  • Housing 14 defines a lower sump portion 24 wherein lubricating oil 25 is collected for circulation to the compressor bearings.
  • the oil is delivered upwardly from the sump 24 through an oil conduit means 26 extending upwardly through the rear head 27 of the compressor.
  • the rotor is provided with a pair of vertical oil passages 28 opening at their lower ends into the lower face 29 of the rotor confronting the upper face 30 of the rear head. At the upper end, the passages 28 open through the upper face 31 of the rotor to an annular groove 32 therein.
  • Shaft 12 is provided with an axial bore 33 which extends through the rotor to open at its lower end through the lower face 29 in communication with the upper end of the oil conduit 26.
  • Shaft 12 includes a large diameter lower end portion 34 and a smaller diameter upper portion 35 connected by a frustoconicalconnecting portion 36.
  • a suitable annular bearing 37 is provided in a large diameter lower recess 38 of the front head 39 for rotatably journalling the shaft portion 34.
  • a spiral oil groove 40 is provided on the outer surface of shaft portion 34 for conducting the lubricating oil to the inner surface of the bearing 37. At its upper end, the oil groove 40 opens into an annular chamber 41 extending about the connecting portion 36 of the shaft and opening at its upper end to the space 42 between the upper shaft portion 35 and an upper tubular extension 43 of the front head.
  • the upper shaft portion 35 further defines an outwardly opening annular groove 44 adjacent shaft connecting portion 36 and a motor journal oil groove 45 is provided in the outer surface of shaft portion 35 extending upwardly from groove 44 to an annular space 46 in the motor armature 47 above the upper end of the bearing extension 43.
  • Shaft portion 35 is provided with radial passages 48 communicating between v the upper end of the axial bore 33 and annular space 46.
  • Clearance 49 is provided between armature 47 and the radially outer surface of the bearing extension 43 opening downwardly from annular space 46 to the head pressure space 50 within housing 14.
  • the rotor 11 is provided with a blade 51 received in the pumping chamber 52 of a cylinder 53 to define the high pressure pump means of the compressor.
  • the centrifugal forces generated on the lubricating oil by the rotation of the blade 51 in the chamber52 as the oil is delivered thereto effectively circulates the oil upwardly from the sump 24.
  • rotor 11 defines a downwardly opening plenum chamber 54 at the upper end of the oil delivery conduit 26.
  • the oil is conducted upwardly therefrom by the oil grooves 40 for lubricating the bearing 37 and for delivering oil upwardly to the motor bearing grooves 45 for lubricating the upper bearing portion 43.
  • the oil overflows the upper end of grooves 45 into annular space 46 and thence downwardly through clearance 49 to return to the sump 24 for recirculation.
  • Shaft 12 is provided with radial passages 56 communicating between chamber 41 and axial bore 33 for conducting the vaporized refrigerant from chamber 41 also into the axial bore 33.
  • the lubricating oil delivered to the upper bearing 43 by the oil passages 45 is relatively free of vaporized refrigerant fluid thereby assuring that the entire bearing means of the rotor shaft is efficiently lubricated with gas-lock thereof by the refrigerant vapor being effectively precluded.
  • the radial passages 48 at the upper end of the axial bore 33 serve as centrifugal gas pumps forcing the refrigerant vapor radially outwardly from the bore 33 to flow downwardly through clearance 49 into the head space of the housing 14.
  • This centrifugal pumping action maintains the axial bore 33 and the radial passages and 56 under a suction pressure tending to facilitate the withdrawal of the vaporized refrigerant fluid at all times during the operation of the compressor thereby further effectively assuring gasfree lubrication of the compressor bearings.
  • refrigerant gas may also flow to the center passage 33 through the blade slot 57 in the rotor in which the blade 51 is slidably carried.
  • the present invention comprehends an improved lubrication system for a rotary compressor wherein refrigerant fluid dissolved in the lubricating oil is separated therefrom and caused to follow a separate flow path from the flow path of the lubricating oilin lubricating the compressor bearings.
  • the rotary motion of a number ofcompressor portions is utilized to effect centrifugal separation and forced flow of the vaporized refrigerant to effectively preclude gas lock? in the compressor bearings and provide improved gall-free operation.
  • the lubrication system is extremely simple and economical of construction while yet providing the improved lubrication function.
  • the rotary compressor means of claim 1 wherein said rotor includes a first shaft portion adjacent said outlet and a second shaft portion having a diameter larger than the diameter of said first shaft portion and extending axially away from said first shaft portion toward said inlet, said shaft portions being journalled in said bearing means and said means for conducting refrigerant gas separating from the oil in said oil passage means intermediate said inlet and said outlet, to said axial passage intermediate said inlet and said outlet comprises passage means extending radially through said rotor including a first passage extending through said rotor at the juncture of said first and second shaft portions and a second passage extending through said rotor at the end of said second shaft portion remote from said first shaft portion.
  • a rotary apparatus having a rotor rotatably journalled in a bearing means, oil passage means for conducting lubricating oil from an inlet, between the rotor and bearing means, and to an outlet, means for causing flow of the lubricating oil through said oil passage means, means defining a gas flow passage for conducting gas from said inlet to said outlet, and means for causing separation of vaporizable gas from the lubricating oil and delivery of said separated gas to said inlet for flow through said gas flow passage to said outlet, the improvement comprising means for conducting additional gas, separating from the oil in said oil passage means intermediate said inlet and said outlet, to said gas flow passage intermediate said inlet and said outlet for flow to said outlet with the gas previously separated from the lubricating oil and delivered to the gas flow passage inlet.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
US00277323A 1972-08-02 1972-08-02 Compressor lubrication system Expired - Lifetime US3804202A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US00277323A US3804202A (en) 1972-08-02 1972-08-02 Compressor lubrication system
CA167,137A CA991425A (en) 1972-08-02 1973-03-27 Compressor lubrication system
AU55876/73A AU469326B2 (en) 1972-08-02 1973-05-18 Rotor bearing lubrication system
BR5818/73A BR7305818D0 (pt) 1972-08-02 1973-07-31 Aperfeicoamentos em compressor rotativo e aparelhorotativo
JP48085914A JPS5223401B2 (hu) 1972-08-02 1973-08-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00277323A US3804202A (en) 1972-08-02 1972-08-02 Compressor lubrication system

Publications (1)

Publication Number Publication Date
US3804202A true US3804202A (en) 1974-04-16

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ID=23060355

Family Applications (1)

Application Number Title Priority Date Filing Date
US00277323A Expired - Lifetime US3804202A (en) 1972-08-02 1972-08-02 Compressor lubrication system

Country Status (5)

Country Link
US (1) US3804202A (hu)
JP (1) JPS5223401B2 (hu)
AU (1) AU469326B2 (hu)
BR (1) BR7305818D0 (hu)
CA (1) CA991425A (hu)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922114A (en) * 1974-07-19 1975-11-25 Dunham Bush Inc Hermetic rotary helical screw compressor with improved oil management
US3948354A (en) * 1974-09-18 1976-04-06 Hydrotile Machinery Company Lubricator for concrete pipe vibrators
US4629403A (en) * 1985-10-25 1986-12-16 Tecumseh Products Company Rotary compressor with vane slot pressure groove
US4640669A (en) * 1984-11-13 1987-02-03 Tecumseh Products Company Rotary compressor lubrication arrangement
US5038891A (en) * 1990-04-12 1991-08-13 Copeland Corporation Refrigerant compressor
US7044717B2 (en) 2002-06-11 2006-05-16 Tecumseh Products Company Lubrication of a hermetic carbon dioxide compressor
US20100092316A1 (en) * 2008-05-27 2010-04-15 Danfoss A/S Refrigerant compressor
US20160032931A1 (en) * 2014-07-29 2016-02-04 Hyundai Motor Company Cooling unit of air compressor for fuel cell vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6136797Y2 (hu) * 1981-04-04 1986-10-24
JPS61125803U (hu) * 1985-01-28 1986-08-07

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738919A (en) * 1951-03-14 1956-03-20 Gibson Refrigerator Co Compressor and lubricating means therefor
US3182901A (en) * 1963-11-12 1965-05-11 Westinghouse Electric Corp Compressor
US3285504A (en) * 1964-12-10 1966-11-15 Gen Motors Corp Refrigerant apparatus
US3674382A (en) * 1970-06-25 1972-07-04 Tokyo Shibaura Electric Co Hermetically sealed electric compressor
US3692435A (en) * 1970-03-25 1972-09-19 Tokyo Shibaura Electric Co Hermetically sealed electric compressor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738919A (en) * 1951-03-14 1956-03-20 Gibson Refrigerator Co Compressor and lubricating means therefor
US3182901A (en) * 1963-11-12 1965-05-11 Westinghouse Electric Corp Compressor
US3285504A (en) * 1964-12-10 1966-11-15 Gen Motors Corp Refrigerant apparatus
US3692435A (en) * 1970-03-25 1972-09-19 Tokyo Shibaura Electric Co Hermetically sealed electric compressor
US3674382A (en) * 1970-06-25 1972-07-04 Tokyo Shibaura Electric Co Hermetically sealed electric compressor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922114A (en) * 1974-07-19 1975-11-25 Dunham Bush Inc Hermetic rotary helical screw compressor with improved oil management
US3948354A (en) * 1974-09-18 1976-04-06 Hydrotile Machinery Company Lubricator for concrete pipe vibrators
US4640669A (en) * 1984-11-13 1987-02-03 Tecumseh Products Company Rotary compressor lubrication arrangement
US4629403A (en) * 1985-10-25 1986-12-16 Tecumseh Products Company Rotary compressor with vane slot pressure groove
US5038891A (en) * 1990-04-12 1991-08-13 Copeland Corporation Refrigerant compressor
US7044717B2 (en) 2002-06-11 2006-05-16 Tecumseh Products Company Lubrication of a hermetic carbon dioxide compressor
US20100092316A1 (en) * 2008-05-27 2010-04-15 Danfoss A/S Refrigerant compressor
US8079830B2 (en) 2008-05-27 2011-12-20 Danfoss A/S Refrigerant compressor
US20160032931A1 (en) * 2014-07-29 2016-02-04 Hyundai Motor Company Cooling unit of air compressor for fuel cell vehicle
US9863430B2 (en) * 2014-07-29 2018-01-09 Hyundai Motor Company Cooling unit of air compressor for fuel cell vehicle

Also Published As

Publication number Publication date
CA991425A (en) 1976-06-22
AU5587673A (en) 1974-11-21
AU469326B2 (en) 1976-02-12
JPS4967210A (hu) 1974-06-29
JPS5223401B2 (hu) 1977-06-24
BR7305818D0 (pt) 1974-06-27

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