EP0162434A3 - Antisuckback device for rotary piston pumps - Google Patents

Antisuckback device for rotary piston pumps Download PDF

Info

Publication number
EP0162434A3
EP0162434A3 EP85106168A EP85106168A EP0162434A3 EP 0162434 A3 EP0162434 A3 EP 0162434A3 EP 85106168 A EP85106168 A EP 85106168A EP 85106168 A EP85106168 A EP 85106168A EP 0162434 A3 EP0162434 A3 EP 0162434A3
Authority
EP
European Patent Office
Prior art keywords
oil
pressure
pump
valve
pumping chamber
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Withdrawn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
EP85106168A
Other languages
German (de)
French (fr)
Other versions
EP0162434A2 (en
Inventor
Alfred H. Bornemann
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.)
SPX Corp
Original Assignee
General Signal 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
Priority to US61263184A priority Critical
Priority to US612631 priority
Application filed by General Signal Corp filed Critical General Signal Corp
Publication of EP0162434A2 publication Critical patent/EP0162434A2/en
Publication of EP0162434A3 publication Critical patent/EP0162434A3/en
Withdrawn legal-status Critical Current

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
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/28—Safety arrangements; Monitoring
    • 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
    • F04C29/021—Control systems for the circulation of the lubricant

Abstract

A rotary piston vacuum pump is provided with an oil pump in the lubricating oil circuit, a pressure relief vent con­ nected to the pumping chamber from a higher pressure source, and biased valve connected between the oil pump and the oil circuit as well as between the pressure relief vent and the first pumping chamber for controlling the flow of oil and pressure, respectively. The oil pump pressurizes the oil in the oil lubrication circuit as a function of vacuum pump operation. The valve is responsive to the oil pressure created by the oil pump. The valve is actuated to maintain the free flow of oil from the oil pump to the oil circuit when the pump is operating. When the pump is shut-off, the bias of the valve shuts off the flow of oil through the oil circuit and opens the connection between the pressure relief vent and the first pumping chamber to increase the pressure in the latter such that lubricating oil is not drawn into that pumping chamber. This increased pressure from the pressure relief vent actuates an inlet shut-off valve which isolates the first pressure cham­ ber from the operating chamber.
EP85106168A 1984-05-21 1985-05-20 Antisuckback device for rotary piston pumps Withdrawn EP0162434A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US61263184A true 1984-05-21 1984-05-21
US612631 1984-05-21

Publications (2)

Publication Number Publication Date
EP0162434A2 EP0162434A2 (en) 1985-11-27
EP0162434A3 true EP0162434A3 (en) 1986-03-05

Family

ID=24453984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85106168A Withdrawn EP0162434A3 (en) 1984-05-21 1985-05-20 Antisuckback device for rotary piston pumps

Country Status (2)

Country Link
EP (1) EP0162434A3 (en)
JP (1) JPS60249690A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63108587U (en) * 1986-12-31 1988-07-13
JPS63112294U (en) * 1987-01-14 1988-07-19
JPH0522079B2 (en) * 1988-08-19 1993-03-26 Kobe Steel Ltd
CA2090390A1 (en) * 1992-08-07 1994-02-08 Jerome C. Roach Fail safe mechanical oil shutoff arrangement for screw compressor
US5341658A (en) * 1992-08-07 1994-08-30 American Standard Inc. Fail safe mechanical oil shutoff arrangement for screw compressor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3057546A (en) * 1957-02-07 1962-10-09 Edwards High Vacuum Ltd Rotary vacuum pumps
DE1428236A1 (en) * 1961-07-13 1968-11-28 Alsacienne D Electronique Et D Rotary vacuum pump working under oil seal
DD131487A1 (en) * 1977-06-24 1978-06-28 Juergen Kaunert SHUT-OFF VALVE WITH AUTOMATIC VENTILATION DEVICE FOR VACUUM PUMPS
DE3033082A1 (en) * 1980-09-03 1982-04-08 Leybold-Heraeus GmbH, 5000 Köln Vacuum pump with oil seal - has centrifugally controlled valve to admit oil when pump runs and shut when pump stops

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3057546A (en) * 1957-02-07 1962-10-09 Edwards High Vacuum Ltd Rotary vacuum pumps
DE1428236A1 (en) * 1961-07-13 1968-11-28 Alsacienne D Electronique Et D Rotary vacuum pump working under oil seal
DD131487A1 (en) * 1977-06-24 1978-06-28 Juergen Kaunert SHUT-OFF VALVE WITH AUTOMATIC VENTILATION DEVICE FOR VACUUM PUMPS
DE3033082A1 (en) * 1980-09-03 1982-04-08 Leybold-Heraeus GmbH, 5000 Köln Vacuum pump with oil seal - has centrifugally controlled valve to admit oil when pump runs and shut when pump stops

Also Published As

Publication number Publication date
EP0162434A2 (en) 1985-11-27
JPS60249690A (en) 1985-12-10

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Effective date: 19860613

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18D Application deemed to be withdrawn

Effective date: 19871202

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BORNEMANN, ALFRED H.