GB2064002A - Liquid Ring Vacuum Pumps - Google Patents

Liquid Ring Vacuum Pumps Download PDF

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Publication number
GB2064002A
GB2064002A GB8037608A GB8037608A GB2064002A GB 2064002 A GB2064002 A GB 2064002A GB 8037608 A GB8037608 A GB 8037608A GB 8037608 A GB8037608 A GB 8037608A GB 2064002 A GB2064002 A GB 2064002A
Authority
GB
United Kingdom
Prior art keywords
port
auxilliary
ports
liquid ring
pump
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Withdrawn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
GB8037608A
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.)
Graham Precision Pumps Ltd
Original Assignee
Graham Precision Pumps 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 Graham Precision Pumps Ltd filed Critical Graham Precision Pumps Ltd
Priority to GB8037608A priority Critical patent/GB2064002A/en
Publication of GB2064002A publication Critical patent/GB2064002A/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Withdrawn legal-status Critical Current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
    • 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
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
    • F04C29/128—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type of the elastic type, e.g. reed valves
    • 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
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • F04C19/005—Details concerning the admission or discharge
    • F04C19/007—Port members in the form of side plates

Abstract

A liquid ring vacuum pump of either a single or multiple stage construction comprises a main discharge port 5, a relatively larger suction port 5' and one or more auxiliary discharge ports 4,4' positioned downstream of the main discharge port and each fitted with a flap valve 2, 3 to enable a compression ratio of 35 to 1 to be obtained. <IMAGE>

Description

SPECIFICATION Improvements in Vacuum Pumps The invention comprises a liquid ring vacuum pump of either single or multi stage construction having two or more port plates and incorporating a main discharge port, a relatively larger suction port and one or more auxilliary discharge ports each fitted with an independent flap valve to prevent reverse flow of air or other fluid, the auxilliary port or ports being positioned down stream of the main discharge port to enable a compression ratio in the range of 35 to 1 to be obtained.
The invention will be described with reference to the accompanying drawings.
Fig. 1 is a vertical section through a liquid ring gas pump; Fig. 2 is a front view of a valve plate partly broken away; Fig. 3 is a section on line 3-3 Fig. 2; Fig. 4 is a front view of the valve plate to a smailer scale.
A liquid ring gas pump A having a bearing pedestal B comprises a control disc 1 having a series of two or more valve plates or flap valves two plates, 2, 3 being illustrated for controlling suction and discharge ports therein masked by the valve plates and one or more auxilliary discharge ports 4,41, positioned down stream of the main discharge port 5, the main discharge port 5 being small relatively to the suction port 51.
At low vacuum the level of sealant or water in the pump is at a low level so that the auxilliary ports 4, 41 which are fitted with the flap valves 2, 3 are open and allow the passage of large volumes of air or gas.
The flap valves 2, 3 are secured to the control disc 1 by screws 8. In the medium vacuum range when the pump begins to draw more sealant the first auxilliary port 4 remains closed and the air or gas is discharged through a second auxilliary port 41 and the main discharge port 5.
At high vacuum when the compression ratio approaches 30/35 to 1 both of the auxilliary ports 4, 4' are closed and the air or gas is discharged through the main discharge port 5.
In this way the compression ratio becomes self regulating by means of the opening and partial opening of the flap valves 2, 3 so that the pump will operate efficiently in the low and medium vacuum ranges.
Claims
1. A liquid ring vacuum pump of either a single or multi stage construction having two or more port plates and incorporating a main discharge port, a relatively larger suction port and one or more auxiliary discharge ports each fitted with an independant flap valve to prevent reverse flow of air or other fluid, the auxilliary port or ports being positioned down stream of the main discharge port to enable a compression ratio in the range of 35 to 1 to be obtained.
2. A liquid ring vacuum pump as in claim 1 in which each of the auxilliary discharge ports are fitted with an independant flap valve to prevent reverse flow of liquid or gas.
3. A liquid ring vacuum pump as in claim 1 in which at high vacuum both auxilliary ports are closed and discharge is through the main port.
4. A liquid ring vacuum pump as in claim 1 in which, in the medium vacuum range an auxilliary discharge port remains closed and discharge is through a second auxilliary port and the main port.
5. A liquid ring vacuum pump substantially as described with reference to the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in Vacuum Pumps The invention comprises a liquid ring vacuum pump of either single or multi stage construction having two or more port plates and incorporating a main discharge port, a relatively larger suction port and one or more auxilliary discharge ports each fitted with an independent flap valve to prevent reverse flow of air or other fluid, the auxilliary port or ports being positioned down stream of the main discharge port to enable a compression ratio in the range of 35 to 1 to be obtained. The invention will be described with reference to the accompanying drawings. Fig. 1 is a vertical section through a liquid ring gas pump; Fig. 2 is a front view of a valve plate partly broken away; Fig. 3 is a section on line 3-3 Fig. 2; Fig. 4 is a front view of the valve plate to a smailer scale. A liquid ring gas pump A having a bearing pedestal B comprises a control disc 1 having a series of two or more valve plates or flap valves two plates, 2, 3 being illustrated for controlling suction and discharge ports therein masked by the valve plates and one or more auxilliary discharge ports 4,41, positioned down stream of the main discharge port 5, the main discharge port 5 being small relatively to the suction port 51. At low vacuum the level of sealant or water in the pump is at a low level so that the auxilliary ports 4, 41 which are fitted with the flap valves 2, 3 are open and allow the passage of large volumes of air or gas. The flap valves 2, 3 are secured to the control disc 1 by screws 8. In the medium vacuum range when the pump begins to draw more sealant the first auxilliary port 4 remains closed and the air or gas is discharged through a second auxilliary port 41 and the main discharge port 5. At high vacuum when the compression ratio approaches 30/35 to 1 both of the auxilliary ports 4, 4' are closed and the air or gas is discharged through the main discharge port 5. In this way the compression ratio becomes self regulating by means of the opening and partial opening of the flap valves 2, 3 so that the pump will operate efficiently in the low and medium vacuum ranges. Claims
1. A liquid ring vacuum pump of either a single or multi stage construction having two or more port plates and incorporating a main discharge port, a relatively larger suction port and one or more auxiliary discharge ports each fitted with an independant flap valve to prevent reverse flow of air or other fluid, the auxilliary port or ports being positioned down stream of the main discharge port to enable a compression ratio in the range of 35 to 1 to be obtained.
2. A liquid ring vacuum pump as in claim 1 in which each of the auxilliary discharge ports are fitted with an independant flap valve to prevent reverse flow of liquid or gas.
3. A liquid ring vacuum pump as in claim 1 in which at high vacuum both auxilliary ports are closed and discharge is through the main port.
4. A liquid ring vacuum pump as in claim 1 in which, in the medium vacuum range an auxilliary discharge port remains closed and discharge is through a second auxilliary port and the main port.
5. A liquid ring vacuum pump substantially as described with reference to the accompanying drawings.
GB8037608A 1979-11-22 1980-11-24 Liquid Ring Vacuum Pumps Withdrawn GB2064002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8037608A GB2064002A (en) 1979-11-22 1980-11-24 Liquid Ring Vacuum Pumps

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7940488 1979-11-22
GB8037608A GB2064002A (en) 1979-11-22 1980-11-24 Liquid Ring Vacuum Pumps

Publications (1)

Publication Number Publication Date
GB2064002A true GB2064002A (en) 1981-06-10

Family

ID=26273651

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8037608A Withdrawn GB2064002A (en) 1979-11-22 1980-11-24 Liquid Ring Vacuum Pumps

Country Status (1)

Country Link
GB (1) GB2064002A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061626A1 (en) * 1981-03-24 1982-10-06 Siemens Aktiengesellschaft Liquid-ring pump with a control disc mounted between an impeller casing and a cover comprising the fluid connexions
US4498844A (en) * 1983-08-08 1985-02-12 The Nash Engineering Company Liquid ring pump with conical or cylindrical port member
US4521161A (en) * 1983-12-23 1985-06-04 The Nash Engineering Company Noise control for conically ported liquid ring pumps
US4551070A (en) * 1983-12-23 1985-11-05 The Nash Engineering Company Noise control for conically ported liquid ring pumps
US4565498A (en) * 1983-10-18 1986-01-21 Siemens Aktiengesellschaft Rotary gas compressor
US4634348A (en) * 1984-10-01 1987-01-06 Sihi Gmbh & Co. Kg Liquid ring compressor having a passageway in discharge port for introducing air
WO1989012168A1 (en) * 1988-06-08 1989-12-14 Pentamo Oy Liquid ring compressor
US5211543A (en) * 1991-05-17 1993-05-18 Siemens Aktiengesellschaft Liquid-ring pump with pressure chamber valve plate
US5356268A (en) * 1993-09-29 1994-10-18 The Nash Engineering Company Check valve structures for liquid ring pumps
US6641369B2 (en) * 1999-05-19 2003-11-04 Robuschi & C. S.P.A. Liquid ring compressor with thin distribution plate

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061626A1 (en) * 1981-03-24 1982-10-06 Siemens Aktiengesellschaft Liquid-ring pump with a control disc mounted between an impeller casing and a cover comprising the fluid connexions
US4498844A (en) * 1983-08-08 1985-02-12 The Nash Engineering Company Liquid ring pump with conical or cylindrical port member
US4565498A (en) * 1983-10-18 1986-01-21 Siemens Aktiengesellschaft Rotary gas compressor
US4610602A (en) * 1983-10-18 1986-09-09 Siemens Aktiengesellschaft Rotary gas compressor
US4521161A (en) * 1983-12-23 1985-06-04 The Nash Engineering Company Noise control for conically ported liquid ring pumps
US4551070A (en) * 1983-12-23 1985-11-05 The Nash Engineering Company Noise control for conically ported liquid ring pumps
US4634348A (en) * 1984-10-01 1987-01-06 Sihi Gmbh & Co. Kg Liquid ring compressor having a passageway in discharge port for introducing air
WO1989012168A1 (en) * 1988-06-08 1989-12-14 Pentamo Oy Liquid ring compressor
US5122035A (en) * 1988-06-08 1992-06-16 Pentamo Oy Liquid ring compressor
US5211543A (en) * 1991-05-17 1993-05-18 Siemens Aktiengesellschaft Liquid-ring pump with pressure chamber valve plate
US5356268A (en) * 1993-09-29 1994-10-18 The Nash Engineering Company Check valve structures for liquid ring pumps
US6641369B2 (en) * 1999-05-19 2003-11-04 Robuschi & C. S.P.A. Liquid ring compressor with thin distribution plate

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)