JPH0436091A - Oil-sealed rotary vacuum pump - Google Patents

Oil-sealed rotary vacuum pump

Info

Publication number
JPH0436091A
JPH0436091A JP14050690A JP14050690A JPH0436091A JP H0436091 A JPH0436091 A JP H0436091A JP 14050690 A JP14050690 A JP 14050690A JP 14050690 A JP14050690 A JP 14050690A JP H0436091 A JPH0436091 A JP H0436091A
Authority
JP
Japan
Prior art keywords
pump chamber
oil
oil feed
forced
load
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
JP14050690A
Other languages
Japanese (ja)
Inventor
Teru Sakazaki
Original Assignee
Shimadzu 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 Shimadzu Corp filed Critical Shimadzu Corp
Priority to JP14050690A priority Critical patent/JPH0436091A/en
Publication of JPH0436091A publication Critical patent/JPH0436091A/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
    • F04C28/24Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F04C28/26Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
    • 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
    • F04C18/00Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • 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
    • F04C23/00Combinations 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
    • F04C23/001Combinations 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 of similar working principle
    • 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
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02Lubrication; Lubricant separation
    • F04C29/021Control systems for the circulation of the lubricant
    • 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
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02Lubrication; Lubricant separation
    • F04C29/025Lubrication; Lubricant separation using a lubricant pump

Abstract

PURPOSE: To prevent an oil-sealed rotary vacuum pump from seizure and so forth during operation under load and from lowering its performance during operation under no load, by connecting a forced oil supply means to a first stage pump chamber by way of a valve adapted to be opened and closed in accordance with a pressure at the suction port the first stage pump chamber.
CONSTITUTION: A second stage pump chamber P2 connected thereto with a forced oil feed means 7 is connected to a first pump chamber P1 through a differential pressure oil feed passage 8. The forced oil feed means 7 is connected to the first pump chamber P1 by way of a valve 11 which is adapted to be opened and closed in accordance with a pressure at the suction port 41 of the first pump chamber P1. With this arrangement in which a large volume of oil can be introduced into the first pump chamber 1 from the forced oil feed means 7 during operation under load, the lubrication for the first pump chamber P1 is sufficiently made so as to prevent seizure or the like. Further, since the forced oil feed means 7 is shut off so that the operating mode is shifted into a differential pressure oil feed mode during operation under no load, i is possible of prevent the performance from lowering in a case such as oil being fed after deaeration in order to carry out high vacuum discharge.
COPYRIGHT: (C)1992,JPO&Japio
JP14050690A 1990-05-29 1990-05-29 Oil-sealed rotary vacuum pump Pending JPH0436091A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14050690A JPH0436091A (en) 1990-05-29 1990-05-29 Oil-sealed rotary vacuum pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14050690A JPH0436091A (en) 1990-05-29 1990-05-29 Oil-sealed rotary vacuum pump

Publications (1)

Publication Number Publication Date
JPH0436091A true JPH0436091A (en) 1992-02-06

Family

ID=15270234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14050690A Pending JPH0436091A (en) 1990-05-29 1990-05-29 Oil-sealed rotary vacuum pump

Country Status (1)

Country Link
JP (1) JPH0436091A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0597730A1 (en) * 1992-11-13 1994-05-18 The BOC Group plc Two stage vacuum pump
EP1536140A1 (en) * 2003-11-27 2005-06-01 Aisin Seiki Kabushiki Kaisha Multistage dry vacuum pump
US7670119B2 (en) * 2004-04-21 2010-03-02 Alcatel Multistage vacuum pump and a pumping installation including such a pump
JP2017523339A (en) * 2014-06-27 2017-08-17 アテリエ ビスク ソシエテ アノニムAtelier Busch SA Vacuum pumping method and vacuum pump system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0597730A1 (en) * 1992-11-13 1994-05-18 The BOC Group plc Two stage vacuum pump
US5573387A (en) * 1992-11-13 1996-11-12 The Boc Group Plc Vacuum pumps
EP1536140A1 (en) * 2003-11-27 2005-06-01 Aisin Seiki Kabushiki Kaisha Multistage dry vacuum pump
US7670119B2 (en) * 2004-04-21 2010-03-02 Alcatel Multistage vacuum pump and a pumping installation including such a pump
JP2017523339A (en) * 2014-06-27 2017-08-17 アテリエ ビスク ソシエテ アノニムAtelier Busch SA Vacuum pumping method and vacuum pump system

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