EP0138182A2 - Pompe à anneau liquide - Google Patents

Pompe à anneau liquide Download PDF

Info

Publication number
EP0138182A2
EP0138182A2 EP84112033A EP84112033A EP0138182A2 EP 0138182 A2 EP0138182 A2 EP 0138182A2 EP 84112033 A EP84112033 A EP 84112033A EP 84112033 A EP84112033 A EP 84112033A EP 0138182 A2 EP0138182 A2 EP 0138182A2
Authority
EP
European Patent Office
Prior art keywords
pressure
liquid ring
ring pump
hollow line
housing cover
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
EP84112033A
Other languages
German (de)
English (en)
Other versions
EP0138182B1 (fr
EP0138182A3 (fr
Inventor
Norbert Dipl.-Ing. Schmid
Siegfried Schönwald
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens 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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0138182A2 publication Critical patent/EP0138182A2/fr
Publication of EP0138182A3 publication Critical patent/EP0138182A3/xx
Application granted granted Critical
Publication of EP0138182B1 publication Critical patent/EP0138182B1/fr
Expired legal-status Critical Current

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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
    • F04C29/122—Arrangements for supercharging the working space
    • 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

Definitions

  • the invention relates to a liquid ring pump with a control disc arranged between the impeller housing and the housing cover provided with a pressure port, in which pump a hollow line serving to supply ballast gas is also connected in the pressure chamber to an opening provided in addition to the pressure slot on the control disc.
  • Such a liquid ring pump is known from DE-PS 284 674.
  • a pipe is connected in the pressure chamber to an opening provided on the control disk, through which ballast gas can be introduced into the wheel cells under certain pressure conditions, so that a pressure corresponding to the atmospheric pressure is achieved at the pressure slot if possible. Since the gas to be pumped reaches a pressure exceeding the atmospheric pressure considerably before the pressure slot is reached even with a low vacuum at the intake port, part of the gas to be pumped and possibly also liquid would escape through the pipe. For this reason, an automatically acting check valve is installed in the pipe, which prevents such escape.
  • the invention has for its object to develop a liquid ring pump of the type described above so that a check valve, which ultimately also represents an additional source of interference, for the hollow line can be dispensed with.
  • the object is achieved according to the invention in that the hollow line with its free end on a essentially from the gas to be pumped, located above the liquid level, opens out in the pressure range.
  • gas and possibly also liquid are expelled into the pump circuit via the hollow line. If there is a negative pressure in the area of the opening, gas is drawn in from the circuit and fed to the pump wheel as ballast gas.
  • the opening itself fulfills a double function. It serves as a pressure opening during a certain operating state and otherwise as a bypass opening for introducing the ballast gas.
  • a structurally particularly simple solution is that a niche is provided on the housing cover, which is designed and arranged according to the operating position of the pump such that a gas bubble forms in the niche above the liquid level during operation of the pump and that the hollow line over the Liquid level flows into the niche.
  • this hollow line can already be arranged in the pressure chamber during the manufacture of the pump, so that no subsequent connection work at the place of use of the pump is necessary.
  • the hollow line opens into the pressure line connected to the pressure connection or into a liquid separator connected downstream of the pump, pumps which have already been installed can be retrofitted with a hollow line without any design changes.
  • liquid ring pumps with pressure openings additionally controlled by valves it is possible to connect the hollow line to one of these pressure openings by omitting the valve.
  • the connection of the waveguide is simplified in that a nipple is inserted into the corresponding pressure opening and the hollow line is attached to this nipple.
  • a secure attachment of the nipple without the need for separate fastening parts is possible in that the nipple is supported on the catch plate of the valves designed as elastic tongues.
  • FIGS. 1 and 2 designates a housing cover on which a suction nozzle 2 and a pressure nozzle 3 are formed.
  • a control disk 4 is inserted, which has a suction slot 5 and a pressure slot 6.
  • additional pressure openings 7 are provided in front of the pressure slot, which are covered by elastic tongues 8.
  • These elastic tongues 8 thus form valves for these additional pressure openings 7.
  • the elastic tongues 8 are supported by a catch plate 17 arranged above them, which is shown in FIGS. 1 and 2 for the sake of clarity is not shown.
  • a hollow line 9 is connected to one of the pressure openings 7 and opens with its free end 10 into a niche 11 provided in the housing cover.
  • the niche 11 is formed by an extension 12 of one side wall of the pressure port 3.
  • ballast gas can flow into the pump chamber via the hollow line 9 and the corresponding pressure opening 7, which is not provided with a valve. If, on the other hand, there is overpressure in the area of the corresponding pressure opening 7 in a certain operating state of the pump, then gas and possibly also liquid are expelled via this pressure opening 7. The gas collects in the niche 11 and the ejected liquid reaches the liquid present in the pressure chamber. There is therefore no need to close the hollow pipe by means of a check valve.
  • FIG. 2 differs from that shown in FIG. 1 in that the hollow line 9 is guided into a liquid separator 13 connected downstream of the liquid ring pump.
  • the free end 10 of the hollow line 9 is arranged above the liquid level 14, so that ballast gas can flow into the pump chamber via the hollow line 9 under appropriate pressure conditions at the liquid ring pump.
  • gas and possibly also liquid can in turn be expelled into the liquid separator 13 via the hollow line 9. Since the attachment of the hollow line 9 does not require any structural changes apart from a possible shortening of the elastic tongue 8 assigned to the corresponding pressure opening 7, the hollow line 9 can also be attached at any time even with already installed liquid ring pumps.
  • FIGS. 3 and 4 show in particular a possibility of connecting the hollow line 9 to the pressure opening 7.
  • a nipple 15 is inserted, which has a tube extension 16 onto which the hollow line 9 is attached.
  • the nipple 15 is clamped under the catch plate 17 provided for the elastic tongues 8.
  • the nipple 15 can therefore not be pressed out of the pressure opening 7.
  • 4 also shows the separating web 18 formed on the housing cover 1, by means of which the suction space 19 provided in the housing cover is separated from the pressure space 20 also provided in the housing cover.
  • FIG. 5 another connection possibility of the hollow line 9 is shown.
  • a bushing 21 is mounted on the housing cover 1 and has on the inside of the housing cover 1 an extension designed as a tube piece 22, the end 23 of which is inserted into a pressure opening 7 of the control disk 4.
  • the hollow line 9 is plugged onto the end 24 of the bushing 21 located on the outside of the housing cover 1. From here, the hollow line 9 is then guided to a point above the liquid level. Because of this outside Connection point for the hollow line 9, this can be laid in a simple manner outside the pump and the pipelines, which means that installation is considerably easier, in particular in the case of a subsequent installation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Mechanical Sealing (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
EP84112033A 1983-10-18 1984-10-08 Pompe à anneau liquide Expired EP0138182B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3337837 1983-10-18
DE19833337837 DE3337837A1 (de) 1983-10-18 1983-10-18 Fluessigkeitsringpumpe

Publications (3)

Publication Number Publication Date
EP0138182A2 true EP0138182A2 (fr) 1985-04-24
EP0138182A3 EP0138182A3 (fr) 1985-06-19
EP0138182B1 EP0138182B1 (fr) 1988-03-09

Family

ID=6212123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112033A Expired EP0138182B1 (fr) 1983-10-18 1984-10-08 Pompe à anneau liquide

Country Status (5)

Country Link
US (2) US4565498A (fr)
EP (1) EP0138182B1 (fr)
JP (1) JPS60108583A (fr)
AU (1) AU562688B2 (fr)
DE (2) DE3337837A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4992028A (en) * 1988-11-07 1991-02-12 Siemens Aktiengesellschaft Liquid ring pump
WO2019175821A1 (fr) * 2018-03-14 2019-09-19 Edwards Technologies Vacuum Engineering (Qingdao) Co Ltd Collecteur de pompe à anneau liquide

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3436022A1 (de) * 1984-10-01 1986-04-03 Sihi Gmbh & Co Kg, 2210 Itzehoe Fluessigkeitsring-verdichter
FI882712A7 (fi) * 1988-06-08 1989-12-09 Pentamo Oy Vaetskeringkompressor.
DE3935247C2 (de) * 1988-11-07 1994-08-11 Siemens Ag Flüssigkeitsringpumpe
US5060759A (en) * 1990-04-13 1991-10-29 Sundstrand Corporation Compressor oil supply system
DE9106151U1 (de) * 1991-05-17 1992-09-17 Siemens AG, 8000 München Flüssigkeitsringpumpe
US5356268A (en) * 1993-09-29 1994-10-18 The Nash Engineering Company Check valve structures for liquid ring pumps
DE10040235C2 (de) * 2000-08-17 2003-04-24 Siemens Ag Flüssigkeitsringpumpe
SE519641C2 (sv) * 2001-08-08 2003-03-25 Metso Paper Inc Kombinerad centrifugal- och vakuumpump för pumpning av massa
KR20100128926A (ko) * 2009-05-29 2010-12-08 두산중공업 주식회사 극저온 액냉매 공급용 펌프
CN105545740B (zh) * 2009-06-26 2018-03-16 佶缔纳士机械有限公司 转换具有密封液体排放的液体环式泵的方法
US8794941B2 (en) 2010-08-30 2014-08-05 Oscomp Systems Inc. Compressor with liquid injection cooling
US9267504B2 (en) 2010-08-30 2016-02-23 Hicor Technologies, Inc. Compressor with liquid injection cooling
US9541086B2 (en) * 2013-10-01 2017-01-10 Gardner Denver Nash Llc Liquid ring pump with modular construction, an inter-stage bypass and overload protection
GB2571970B (en) * 2018-03-14 2020-09-16 Edwards Tech Vacuum Engineering (Qingdao) Co Ltd A liquid ring pump manifold with integrated non-return valve

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE284674C (fr) *
DE258483C (fr) *
FR456214A (fr) * 1912-04-02 1913-08-20 Cie Generale D Electricite De Soufflerie ou pompe à roue à palettes, avec enveloppe excentrée et couronne liquide rotative formant joint
US1180613A (en) * 1913-03-19 1916-04-25 Siemens Schuckertwerke Gmbh Rotary pump.
US1418040A (en) * 1920-06-07 1922-05-30 Reuben N Trane Compressor or vacuum pump
US2256201A (en) * 1937-02-26 1941-09-16 Siemens Ag Refrigerating apparatus of the compression type
DE1098150B (de) * 1958-05-30 1961-01-26 Heraeus Gmbh W C Vakuumpumpe mit Gasballasteinrichtung
GB1284473A (en) * 1969-04-26 1972-08-09 Siemens Ag Improvements in or relating to liquid ring pumps
GB1317568A (en) * 1969-10-11 1973-05-23 Plessey Co Ltd Liquid ring pumps
DE2036295C3 (de) * 1970-07-22 1975-09-18 Siemen & Hinsch Gmbh Flüssigkeitsringverdichter
DE2401177A1 (de) * 1974-01-11 1975-07-24 Pfeiffer Vakuumtechnik Vorrichtung zur geraeuschdaempfung bei drehschieberpumpen
SU779643A1 (ru) * 1975-12-30 1980-11-15 Предприятие П/Я В-2964 Компрессорна установка
US4083658A (en) * 1976-09-08 1978-04-11 Siemens Aktiengesellschaft Liquid ring compressor including a calibrated gas input opening
DE2704863A1 (de) * 1977-02-05 1978-08-10 Kloeckner Humboldt Deutz Ag Rueckschlagventil fuer eine fluessigkeitsring-gaspumpe
GB2064002A (en) * 1979-11-22 1981-06-10 Graham Precision Pumps Ltd Liquid Ring Vacuum Pumps
DE3111538A1 (de) * 1981-03-24 1982-10-21 Siemens AG, 1000 Berlin und 8000 München Fluessigkeitsringpumpe mit einer zwischen dem laufradgehaeuse und dem mit anschlussstutzen versehenen deckel angeordneten steuerscheibe
DE3124867C2 (de) * 1981-06-24 1983-11-17 Siemens AG, 1000 Berlin und 8000 München Flüssigkeitsring-Vakuumpumpe für gasförmige Medien

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4992028A (en) * 1988-11-07 1991-02-12 Siemens Aktiengesellschaft Liquid ring pump
WO2019175821A1 (fr) * 2018-03-14 2019-09-19 Edwards Technologies Vacuum Engineering (Qingdao) Co Ltd Collecteur de pompe à anneau liquide
US11542943B2 (en) 2018-03-14 2023-01-03 Edwards Technologies Vacuum Engineering (Qingdao) Company Limited Liquid ring pump manifold

Also Published As

Publication number Publication date
EP0138182B1 (fr) 1988-03-09
DE3469780D1 (en) 1988-04-14
JPS60108583A (ja) 1985-06-14
AU3430084A (en) 1985-04-26
EP0138182A3 (fr) 1985-06-19
DE3337837A1 (de) 1985-04-25
AU562688B2 (en) 1987-06-18
US4610602A (en) 1986-09-09
US4565498A (en) 1986-01-21

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