EP2264319A3 - Oil free screw compressor - Google Patents

Oil free screw compressor Download PDF

Info

Publication number
EP2264319A3
EP2264319A3 EP10164131.4A EP10164131A EP2264319A3 EP 2264319 A3 EP2264319 A3 EP 2264319A3 EP 10164131 A EP10164131 A EP 10164131A EP 2264319 A3 EP2264319 A3 EP 2264319A3
Authority
EP
European Patent Office
Prior art keywords
rotors
casing
discharge port
screw compressor
oil free
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.)
Granted
Application number
EP10164131.4A
Other languages
German (de)
French (fr)
Other versions
EP2264319A2 (en
EP2264319B1 (en
Inventor
Takashi Saito
Seiji Tsuru
Toshikazu Uchida
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.)
Hitachi Industrial Equipment Systems Co Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP2264319A2 publication Critical patent/EP2264319A2/en
Publication of EP2264319A3 publication Critical patent/EP2264319A3/en
Application granted granted Critical
Publication of EP2264319B1 publication Critical patent/EP2264319B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • 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
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/086—Carter
    • 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
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/088—Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement
    • 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
    • F04C29/0021—Systems for the equilibration of forces acting on the pump
    • F04C29/0035—Equalization of pressure pulses
    • 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
    • F04C29/06—Silencing
    • F04C29/065—Noise dampening volumes, e.g. muffler chambers
    • 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
    • F04C29/06—Silencing
    • F04C29/068—Silencing the silencing means being arranged inside the pump housing
    • 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
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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
    • F04C2250/00—Geometry
    • F04C2250/10—Geometry of the inlet or outlet
    • F04C2250/102—Geometry of the inlet or outlet of the outlet

Landscapes

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

Abstract

An oil free screw compressor comprises: a pair of male and female screw rotors (1,2) in which two or more twisted teeth are formed; a casing (3) which receives both the rotors (1,2) and in which a suction port and a discharge port are formed; and bearings (11-14) which rotatably support shaft end parts of both the rotors (1,2) and are held in the casing (3). There is provided a slot (6), next to the discharge port of the casing (3), which comes into communication with the discharge port with timing where a volume of a compression chamber formed by both the rotors (1,2) and the casing (3) becomes substantially zero as both the rotors (1,2) rotate, to prevent problems such as excessive compression.
EP10164131.4A 2009-05-28 2010-05-27 Oil free screw compressor Active EP2264319B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009129389A JP5422260B2 (en) 2009-05-28 2009-05-28 Oil-free screw compressor

Publications (3)

Publication Number Publication Date
EP2264319A2 EP2264319A2 (en) 2010-12-22
EP2264319A3 true EP2264319A3 (en) 2014-05-21
EP2264319B1 EP2264319B1 (en) 2017-01-11

Family

ID=42315405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10164131.4A Active EP2264319B1 (en) 2009-05-28 2010-05-27 Oil free screw compressor

Country Status (3)

Country Link
EP (1) EP2264319B1 (en)
JP (1) JP5422260B2 (en)
CN (1) CN101900119B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102352843A (en) * 2011-09-26 2012-02-15 江西隆恒科技有限公司 Oil-free double-screw compressor
DE102012009103A1 (en) * 2012-05-08 2013-11-14 Ralf Steffens spindle compressor
JP6184837B2 (en) * 2013-10-30 2017-08-23 株式会社日立産機システム Screw compressor
EP3245405B2 (en) * 2015-01-15 2022-09-28 Atlas Copco Airpower, Naamloze Vennootschap Oil-injected vacuum pump element
CN112780551A (en) * 2021-02-26 2021-05-11 珠海格力电器股份有限公司 Rotor subassembly, compressor and air conditioner
CN116255335A (en) * 2023-03-27 2023-06-13 英格索兰技术研发(上海)有限公司 Vacuum pump

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2578196A (en) * 1946-11-30 1951-12-11 Imo Industri Ab Screw compressor
US4560333A (en) * 1984-02-07 1985-12-24 Hitachi, Ltd. Screw compressor
US5413467A (en) * 1991-01-24 1995-05-09 Hitachi, Ltd. Oil-free type screw compressor device

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB282752A (en) 1926-12-30 1928-05-31 Josef Kozousek Improvements in rotary machines for compressing and conveying liquids
US3622256A (en) 1969-10-14 1971-11-23 Alexandr Ivanovich Borisoglebs Screw-rotor machine
JPS58131388A (en) * 1982-01-29 1983-08-05 Hitachi Ltd Screw compressor
JPH06100188B2 (en) * 1984-09-05 1994-12-12 株式会社日立製作所 Oil-free screw vacuum pump
JPS6336083A (en) * 1986-07-29 1988-02-16 Mayekawa Mfg Co Ltd Pressure alleviating device for delivery port of screw type compressor
JPS6345488A (en) 1986-08-11 1988-02-26 Kobe Steel Ltd Oil-free screw compressor
JP2550066Y2 (en) * 1990-08-28 1997-10-08 本田技研工業株式会社 Screw compressor
JPH05302582A (en) * 1992-04-24 1993-11-16 Hitachi Ltd Lubrication type screw compressor
JPH05312174A (en) * 1992-05-11 1993-11-22 Hitachi Ltd Screw vacuum pump
JPH07247990A (en) * 1994-03-09 1995-09-26 Ebara Corp Screw fluid machine provided with flow dividing port
JPH09291891A (en) * 1996-04-26 1997-11-11 Hitachi Ltd Screw compressor
JPH10213085A (en) * 1997-01-28 1998-08-11 Kobe Steel Ltd Screw compressor and casing casting method therefor
JP2002013494A (en) * 2000-06-29 2002-01-18 Tochigi Fuji Ind Co Ltd Fluid machine
JP5000962B2 (en) * 2006-09-28 2012-08-15 株式会社日立産機システム Screw compressor
JP2008297944A (en) * 2007-05-30 2008-12-11 Hitachi Industrial Equipment Systems Co Ltd Screw compressor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2578196A (en) * 1946-11-30 1951-12-11 Imo Industri Ab Screw compressor
US4560333A (en) * 1984-02-07 1985-12-24 Hitachi, Ltd. Screw compressor
US5413467A (en) * 1991-01-24 1995-05-09 Hitachi, Ltd. Oil-free type screw compressor device

Also Published As

Publication number Publication date
CN101900119A (en) 2010-12-01
CN101900119B (en) 2013-10-30
JP5422260B2 (en) 2014-02-19
EP2264319A2 (en) 2010-12-22
EP2264319B1 (en) 2017-01-11
JP2010275931A (en) 2010-12-09

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