JPS59131791A - Screw compressor - Google Patents

Screw compressor

Info

Publication number
JPS59131791A
JPS59131791A JP685883A JP685883A JPS59131791A JP S59131791 A JPS59131791 A JP S59131791A JP 685883 A JP685883 A JP 685883A JP 685883 A JP685883 A JP 685883A JP S59131791 A JPS59131791 A JP S59131791A
Authority
JP
Japan
Prior art keywords
unload
hole
rotor casing
unload valve
valve
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.)
Pending
Application number
JP685883A
Other languages
Japanese (ja)
Inventor
Masayuki Kurahashi
Shinichi Suzuki
Isato Ikeda
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.)
Toyota Industries Corp
Original Assignee
Toyoda Jidoshokki Seisakusho KK
Toyoda Automatic Loom Works 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 Toyoda Jidoshokki Seisakusho KK, Toyoda Automatic Loom Works Ltd filed Critical Toyoda Jidoshokki Seisakusho KK
Priority to JP685883A priority Critical patent/JPS59131791A/en
Publication of JPS59131791A publication Critical patent/JPS59131791A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/10Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
    • F04C28/16Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using lift valves

Abstract

PURPOSE:To obtain a sufficient delivery capacity decreasing effect by the small moving amount of an unload valve by a method wherein an unload hole is formed on a rotor casing at a part surrounding a compression chamber while an unload valve is fitted into the hole slidably. CONSTITUTION:The unload hole 60 is opened at the inner surface of the rotor casing main body 10 so as to be communicated with the compression chamber under the initial period of compression stroke while it is also communicated with a suction chamber 40 through an unload path 62, penetrating through the rotor casing main body 10 and a front side plate 12 and arriving at a space inside of a front housing 52. The unload valve 64 is fitted into the unload hole air- tightly and slidably substantially while the unload valve 64 is advanced against the energizing force of a spring 70 when a high pressure fluid is supplied to a pressure chamber 72, and the delivery capacity decreasing effect may be obtained.
JP685883A 1983-01-19 1983-01-19 Screw compressor Pending JPS59131791A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP685883A JPS59131791A (en) 1983-01-19 1983-01-19 Screw compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP685883A JPS59131791A (en) 1983-01-19 1983-01-19 Screw compressor

Publications (1)

Publication Number Publication Date
JPS59131791A true JPS59131791A (en) 1984-07-28

Family

ID=11649931

Family Applications (1)

Application Number Title Priority Date Filing Date
JP685883A Pending JPS59131791A (en) 1983-01-19 1983-01-19 Screw compressor

Country Status (1)

Country Link
JP (1) JPS59131791A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4737082A (en) * 1986-01-31 1988-04-12 Stal Refrigeration Ab Lift valve for rotary screw compressors
EP0350426A2 (en) * 1988-07-05 1990-01-10 Carrier Corporation Common compression zone access ports for positive displacement compressor
JPH02298687A (en) * 1989-03-08 1990-12-11 Stal Refrigeration Ab Valve device for control of inner volume relation in screw type rotary compressor
JPH0318625A (en) * 1989-06-14 1991-01-28 Mazda Motor Corp Controller of engine with mechanical type supercharger
JPH0442222U (en) * 1990-08-10 1992-04-09
JPH0569388U (en) * 1992-02-24 1993-09-21 本田技研工業株式会社 Screw type pump
US5556271A (en) * 1994-11-23 1996-09-17 Coltec Industries Inc. Valve system for capacity control of a screw compressor and method of manufacturing such valves
EP0775826A1 (en) * 1995-11-23 1997-05-28 Bitzer Kühlmaschinenbau GmbH & Co. KG Screw compressor
US7993120B2 (en) * 2005-09-07 2011-08-09 Carrier Corporation Slide valve
US11306721B2 (en) * 2018-12-26 2022-04-19 Trane International Inc. Variable volume ratio screw compressor
WO2022161857A1 (en) * 2021-01-29 2022-08-04 R-718 Spindel Gbr R718* compressor with actuators for the volume ratio

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4737082A (en) * 1986-01-31 1988-04-12 Stal Refrigeration Ab Lift valve for rotary screw compressors
EP0350426A2 (en) * 1988-07-05 1990-01-10 Carrier Corporation Common compression zone access ports for positive displacement compressor
JPH02298687A (en) * 1989-03-08 1990-12-11 Stal Refrigeration Ab Valve device for control of inner volume relation in screw type rotary compressor
JPH0318625A (en) * 1989-06-14 1991-01-28 Mazda Motor Corp Controller of engine with mechanical type supercharger
JPH0442222U (en) * 1990-08-10 1992-04-09
JPH0569388U (en) * 1992-02-24 1993-09-21 本田技研工業株式会社 Screw type pump
US5556271A (en) * 1994-11-23 1996-09-17 Coltec Industries Inc. Valve system for capacity control of a screw compressor and method of manufacturing such valves
US5694682A (en) * 1994-11-23 1997-12-09 Coltec Industries Inc. Method of manufacturing valve system for capacity control of a screw compressor
USRE36281E (en) * 1994-11-23 1999-08-24 Coltec Industries Inc. Valve system for capacity control of a screw compressor and method of manufacturing such valves
USRE36274E (en) * 1994-11-23 1999-08-24 Coltec Industries Inc Method of manufacturing valve system for capacity control of a screw compressor
EP0775826A1 (en) * 1995-11-23 1997-05-28 Bitzer Kühlmaschinenbau GmbH & Co. KG Screw compressor
US7993120B2 (en) * 2005-09-07 2011-08-09 Carrier Corporation Slide valve
US11306721B2 (en) * 2018-12-26 2022-04-19 Trane International Inc. Variable volume ratio screw compressor
WO2022161857A1 (en) * 2021-01-29 2022-08-04 R-718 Spindel Gbr R718* compressor with actuators for the volume ratio

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