EP0071715B1 - Pompe à vide du type à anneau liquide pour fluides gazeux - Google Patents

Pompe à vide du type à anneau liquide pour fluides gazeux Download PDF

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Publication number
EP0071715B1
EP0071715B1 EP82105132A EP82105132A EP0071715B1 EP 0071715 B1 EP0071715 B1 EP 0071715B1 EP 82105132 A EP82105132 A EP 82105132A EP 82105132 A EP82105132 A EP 82105132A EP 0071715 B1 EP0071715 B1 EP 0071715B1
Authority
EP
European Patent Office
Prior art keywords
pressure
liquid
vacuum pump
liquid ring
rotor
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.)
Expired
Application number
EP82105132A
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German (de)
English (en)
Other versions
EP0071715A3 (en
EP0071715A2 (fr
Inventor
Wilfried Lübke
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
Original Assignee
Siemens AG
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 filed Critical Siemens AG
Publication of EP0071715A2 publication Critical patent/EP0071715A2/fr
Publication of EP0071715A3 publication Critical patent/EP0071715A3/de
Application granted granted Critical
Publication of EP0071715B1 publication Critical patent/EP0071715B1/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
    • 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

Definitions

  • the invention relates to a liquid vacuum pump for gaseous media with a machine housing which eccentrically surrounds an impeller and which is closed at the end by end shields for the impeller shaft, of which at least one end shield has separate inlets and outlets for the medium which pass through suction and pressure slots a plane control disc arranged between it and the machine housing with vane chambers of the impeller which are closed off from the circumference of the liquid ring, that a pressure fluid channel connected to an external pressure fluid supply line is provided in the end shield between its inlets and outlets and opens into a pressure fluid inlet provided in the control disc and the hydraulic fluid inlet corresponds to a hydraulic fluid passage located on the end face in front of the impeller hub below the shaft passage in the control disk, so that the hydraulic fluid seals the gap in the fluids tsring flows off.
  • Such vacuum pumps are from the Siemens price list P20, part I from July 1964, esp. Pages 4 to 7 and from the Siemens publication order no. E725 / 1013 "Vacuum pumps and compressors Siemens system ELMO-F " esp. Pages 2 to 5, known.
  • the known vacuum pumps each have a passage in the control disk for the supply of return liquid (also referred to as suction liquid or circulating liquid), which is removed from the liquid separator of the vacuum pump as part of the operating liquid replacing the loss in the rotating liquid ring.
  • return liquid also referred to as suction liquid or circulating liquid
  • the portion of the operating fluid required to cool the vacuum pump is supplied to the vacuum pump as fresh or recooled pressure fluid.
  • the pressure fluid can either be taken from water supply networks as fresh water or in a circuit from the liquid separator with the interposition of a heat exchanger and a pressure increasing device or from pressure-increasing scoop pipes arranged in the machine housing according to DE-A-2317 420.
  • gap losses occur in the known vacuum pumps in all operating modes up to an intake pressure of about 60 mbar, which impair the efficiency.
  • a reduction in the gap losses by reducing the axial play of the impellers can only be achieved to a very limited extent, since the operational safety of the vacuum pump is questioned if the axial play is too small.
  • liquid ring vacuum pumps of the type mentioned at the outset which are also intended to convey liquids in the region of higher suction pressures besides gaseous medium
  • this pre-separator requires a reduced efficiency when only gas is extracted.
  • the object of the invention is to make do without passages for the return liquid and without pressure-increasing devices in circular operation and, with a simpler design of the liquid ring vacuum pumps, to operate them with higher efficiency without erosion and / or cavitation damage.
  • the impeller (not shown) with blades arranged on the circumference of its impeller hub is arranged eccentrically in a machine housing (not shown).
  • the impeller shaft penetrates shaft passages 4 of plane control disks 1 covering the machine housing, for example on both sides, which are in turn covered on the outside by end shields (not shown) for the impeller shaft and which in the case of the described double-flow pump have separate inlets and outlets for the medium to be pumped.
  • These inlets or outlets are connected via suction slits 2 or pressure slits 3 in the control disks 1 to the vane chambers which are closed on the circumference by the liquid ring which rotates within the machine housing with the impeller.
  • Liquid channels are provided in the end shields between the inlets and outlets, which are connected to a hydraulic fluid supply line located outside the machine and open into hydraulic fluid inlets 5 to hydraulic fluid passages 6 in the control disks 1.
  • the pressure fluid passage 6 is formed on the side 1A as an annular groove surrounding the shaft passage 4, into which an inflow channel 7 attached on the side 1A opens from the outer circumference.
  • the inflow channel 7 deflects the gap-sealing pressure fluid in the direction of the rotating fluid ring into it in a vortex-free manner, the inflow channel 7, viewed in the direction of the impeller rotation, being arranged behind the suction slot 2 and below the shaft passage 4 parallel to a diameter axis running between the suction and pressure slot as a milling groove.
  • several inflow channels can also be provided.
  • a liquid ring vacuum pump is connected at the outlet of each end shield to a separator which is connected to the pressure fluid inlet 5 via a line (not shown) instead of, as is known, to a liquid return.

Claims (4)

1. Pompe à vide à anneau liquide, pour des milieux gazeux, comprenant un corps de machine qui entoure de manière excentrée une roue à aubes, qui est fermé du côté frontal par des flasques formant paliers pour l'arbre de la roue à aubes, l'un au moins de ces flasques formant paliers présentant des entrées et des sorties distinctes pour le milieu, qui communiquent, par des fentes d'aspiration (2) et de refoulement (3) ménagées dans un disque de commande (1) plan disposé entre ledit flasque et le corps de machine, avec des chambres à aubes de la roue à aubes fermées du côté périphérique par un anneau de liquide, un canal pour le liquide sous pression, raccordé à un conduit extérieur d'admission du liquide sous pression, étant prévu dans le flasque formant palier, entre ses entrées et sorties et débouchant dans une entrée (5) pour le liquide sous pression, prévue dans le disque de commande (1) et l'entrée (5) pour le liquide sous pression correspondant, en-dessous du passage (4) pour l'arbre ménagé dans le disque de commande (1), avec un passage (6) pour le liquide sous pression disposé du côté frontal devant le moyeu de la roue à aubes, de manière à ce que le liquide sous pression s'écoule, en assurant l'étanchéité de chemisage, dans l'anneau ee liquide, caractérisée en ce que le disque de commande (1) présente, sur la face (1A) tournée vers la roue à aubes, au moins une gouttière d'entrée (7) qui est située, si l'on regarde dans le sens de rotation de la roue à aubes, derrière la fente d'aspiration (2) et en-dessous du passage pour l'arbre (4), qui s'étend au-delà de la région du moyeu de la roue à aubes jusque dans la région des chambres à aubes et qui communique avec le passage (6) pour le liquide refoulé, et un séparateur de liquide, en aval de la sortie ménagée dans le flasque formant palier ou, dans le cas où il n'y a pas de séparateur de liquide, le puisard de la pompe à vide communique exclusivement avec le conduit d'amenée du liquide refoulé.
2. Pompe à vide à anneau liquide suivant la revendication 1, caractérisée en ce qu'une gouttière d'entrée (7) unique s'étend longitudinalement et parallèlement à un axe diamétral du disque de commande (1) se trouvant entre la fente d'aspiration (2) et la fente de refoulement (3) et est constituée sous la forme d'une gorge fraisée.
3. Pompe à vide à anneau liquide pour des milieux gazeux suivant la revendication 1 ou 2, pour refouler, au choix, des liquides, caractérisée en ce que le disque de commande (1) présente, au-dessus de la fente de refoulement (3) et au voisinage de son contour extérieur, au moins un passage de déchargement (8) supplémentaire pour l'anneau liquide qui est distinct de la fente de refoulement (3).
4. Pompe à vide à anneau liquide suivant la revendication 3, caractérisée en ce que le passage de déchargement (8) est prévu sous la forme d'un perçage au-dessus de l'extrémité de la fente de refoulement.
EP82105132A 1981-06-24 1982-06-11 Pompe à vide du type à anneau liquide pour fluides gazeux Expired EP0071715B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3124867A DE3124867C2 (de) 1981-06-24 1981-06-24 Flüssigkeitsring-Vakuumpumpe für gasförmige Medien
DE3124867 1981-06-24

Publications (3)

Publication Number Publication Date
EP0071715A2 EP0071715A2 (fr) 1983-02-16
EP0071715A3 EP0071715A3 (en) 1984-03-07
EP0071715B1 true EP0071715B1 (fr) 1986-09-10

Family

ID=6135297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82105132A Expired EP0071715B1 (fr) 1981-06-24 1982-06-11 Pompe à vide du type à anneau liquide pour fluides gazeux

Country Status (8)

Country Link
US (1) US4545730A (fr)
EP (1) EP0071715B1 (fr)
JP (1) JPS585495A (fr)
AU (1) AU552788B2 (fr)
BR (1) BR8203646A (fr)
CA (1) CA1217173A (fr)
DE (1) DE3124867C2 (fr)
IN (1) IN160801B (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3337837A1 (de) * 1983-10-18 1985-04-25 Siemens AG, 1000 Berlin und 8000 München Fluessigkeitsringpumpe
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
JPS6220445U (fr) * 1985-07-23 1987-02-06
US4756672A (en) * 1986-01-27 1988-07-12 Siemens Aktiengesellschaft Liquid-ring pump with maintenance of liquid level
US4755107A (en) * 1986-05-14 1988-07-05 Siemens Aktiengesellschaft Liquid-ring pump having additional openings in control disc for warm and cold liquid
US4679987A (en) * 1986-05-19 1987-07-14 The Nash Engineering Company Self-priming liquid ring pump methods and apparatus
DE4214960C1 (de) * 1992-05-06 1993-11-25 Siemens Ag Flüssigkeitsringmaschine
DE4301907A1 (de) * 1993-01-25 1994-07-28 Siemens Ag Flüssigkeitsringmaschine
US5464329A (en) * 1994-05-25 1995-11-07 Miura Co., Ltd. Water ring type pump with sidewall water reflux passage
GB2303879B (en) * 1995-08-01 1999-09-15 Hick Hargreaves & Co Ltd Liquid ring pump
CN1079503C (zh) * 1995-08-16 2002-02-20 西门子公司 液体环式压缩机
US6106239A (en) * 1997-11-14 2000-08-22 Vooner Vacuum Pumps, Inc. Air flow apparatus for liquid ring vacuum pump
DE29803322U1 (de) * 1998-02-25 1999-07-15 Speck Pumpen Walter Speck Kg Flüssigkeitsringmaschine
US6558131B1 (en) * 2001-06-29 2003-05-06 nash-elmo industries, l.l.c. Liquid ring pumps with automatic control of seal liquid injection
EP1855010B1 (fr) * 2006-05-11 2008-08-13 Pompetravaini S.p.A. Pompe à vide à anneau liquide monoétagée avec tubulures d'aspiration et de refoulement intégrées au corps central.
MX351024B (es) * 2011-11-22 2017-09-28 Sterling Ind Consult Gmbh Bomba de vacío de anillo líquido e impelente para una bomba de vacío de anillo líquido.
US9689387B2 (en) * 2012-10-30 2017-06-27 Gardner Denver Nash, Llc Port plate of a flat sided liquid ring pump having a gas scavenge passage therein

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2317420A1 (de) * 1973-04-06 1975-03-13 Siemens Ag Fluessigkeitsringgasverdichter

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US29747A (en) * 1860-08-21 Improved telegraphic instrument
AT63355B (de) * 1912-08-26 1914-02-10 Siemens Schuckertwerke Wien Flügelradgebläse oder -pumpe mit exzentrischem Gehäuse und abdichtendem kreisenden Flüssigkeitsring.
US1180613A (en) * 1913-03-19 1916-04-25 Siemens Schuckertwerke Gmbh Rotary pump.
US1662250A (en) * 1926-06-11 1928-03-13 Irving C Jennings Method and apparatus relating to motor-driven pumps
DE1027358B (de) * 1955-02-08 1958-04-03 Siemens Ag Fluessigkeitsringpumpe
GB1284473A (en) * 1969-04-26 1972-08-09 Siemens Ag Improvements in or relating to liquid ring pumps
DE2318538B2 (de) * 1973-04-12 1975-12-04 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verteiler für einen Flüssigkeitsringgasverdichter
DE2541050B2 (de) * 1975-09-15 1977-09-29 Siemens AG, 1000 Berlin und 8000 München Fluessigkeitsringverdichter
US4273515A (en) * 1976-04-07 1981-06-16 General Signal Corporation Liquid ring pump
US4323334A (en) * 1980-01-25 1982-04-06 The Nash Engineering Company Two stage liquid ring pump
US4392783A (en) * 1980-12-12 1983-07-12 The Nash Engineering Company Liquid ring pump employing discharged pumping liquid for discharge port control

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2317420A1 (de) * 1973-04-06 1975-03-13 Siemens Ag Fluessigkeitsringgasverdichter

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
SIEMENS DRUCKSCHRIFT Best. Nr. E725/1013 *
SIEMENS-PREISLISTE P 20(I.Teil) *

Also Published As

Publication number Publication date
EP0071715A3 (en) 1984-03-07
JPS585495A (ja) 1983-01-12
EP0071715A2 (fr) 1983-02-16
US4545730A (en) 1985-10-08
BR8203646A (pt) 1983-06-14
AU552788B2 (en) 1986-06-19
DE3124867C2 (de) 1983-11-17
CA1217173A (fr) 1987-01-27
IN160801B (fr) 1987-08-08
DE3124867A1 (de) 1983-01-13
AU8514682A (en) 1983-01-06

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