EP0245626A2 - Liquid-ring machine - Google Patents

Liquid-ring machine Download PDF

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Publication number
EP0245626A2
EP0245626A2 EP87104438A EP87104438A EP0245626A2 EP 0245626 A2 EP0245626 A2 EP 0245626A2 EP 87104438 A EP87104438 A EP 87104438A EP 87104438 A EP87104438 A EP 87104438A EP 0245626 A2 EP0245626 A2 EP 0245626A2
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EP
European Patent Office
Prior art keywords
slot
groove
liquid ring
opening
partial
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
EP87104438A
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German (de)
French (fr)
Other versions
EP0245626A3 (en
EP0245626B1 (en
Inventor
Peter Dipl.-Ing. Trimborn
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
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0245626A2 publication Critical patent/EP0245626A2/en
Publication of EP0245626A3 publication Critical patent/EP0245626A3/en
Application granted granted Critical
Publication of EP0245626B1 publication Critical patent/EP0245626B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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 ring machine with an eccentrically arranged within a housing, rotating in engagement with a rotating liquid ring, the shaft of which is rotatably mounted in bearing plates arranged on both sides of the housing and at least one bearing plate as with inlets and outlets for the medium to be conveyed and with Connections for the liquid ring additionally supplied operating fluids is formed according to the preamble of claim 1.
  • Such a liquid ring machine is known from DE-AS 10 27 358, in which correspondingly heated partial liquid is drained from the rotating liquid ring behind the end of the pressure slot via an opening in the control disk and is supplied via a radial transverse groove to a shaft-concentric ring groove covered by the impeller hub, from which this partial liquid flows again radially over the entire circumference of the annular groove as a sealing gap liquid to the rotating liquid ring.
  • a second, colder portion of the operating fluid which replaces the fluid ring losses, is supplied to the fluid ring from the outside at a lower pressure via an opening not covered by the impeller hub between the end of the suction slot and the beginning of the pressure slot, for example from a fluid separator arranged downstream of the outlet of the control plate.
  • the amount of operating fluid flowing into the rotating liquid ring is warmer than the coolest partial liquid, which worsens the condensation effect in the case of moisture or water vapor extraction and increases evaporation when conveying dry air.
  • the invention has for its object to improve the condensation effect in liquid ring machines, in particular in pumps of the type mentioned, to reduce the evaporation when conveying dry air and thus to increase the pumping speed of the machine.
  • a known double-flow liquid ring machine is shown in an exploded view, in which the mixture of warmer and colder operating liquid portions takes place in the respective side plate 1 and the mixture of both through the passage 2 in the respective control disc 3 in the gap between the control disc 3 and paddle wheel 4th flows.
  • control disk is designed according to an exemplary embodiment, which is shown in FIG. 2 as a top view of the inside facing the paddle wheel and in FIG. 3 as a section along the line III-III of FIG. 2.
  • a partial annular groove 8 is provided, which is connected to at least one opening 9, 9 ⁇ and this opening 9 opens into a separate chamber in the side plate, which chamber is connected only to a coolant inlet to the a fresh water line or a liquid separator is connected via a recooler behind the outlet grooves in the side plate.
  • the partial ring groove 8 extends at least over the entire area of the suction slot 5 and can be led out of the impeller hub area at one end 8A behind the end of the suction slot. Furthermore, the partial ring groove can be extended beyond the beginning of the suction slot and optionally, as shown in broken lines, can be guided out of the paddle wheel hub area and connected there with an opening 9 ⁇ réelle.
  • the one or more openings 9, 9 ⁇ , 9 ⁇ can advantageously be provided at said end 8A of the partial annular groove 8, so that a cold, evenly distributed cold fissure liquid portion flows over the entire suction slot 5 in the direction of the paddle wheel rotation and optimizes the condensation effect.
  • a separate ring groove 10, 10 ⁇ is provided, which is at least least from the beginning of the pressure slot 6 to at most before the end of the same, in particular up to controllable partial areas and with at least one opening 11, 11 ⁇ is connected, which opens into a separate chamber in the side plate, a separator or the rotating liquid ring, through which in known Way warmer liquid flows into the liquid ring, so that from this chamber via the opening 11 and the partial ring groove 10, 10 ⁇ the gap sealing liquids are returned to the liquid ring.
  • the opening 11 is covered by the impeller hub and can be connected to a recess 11A which extends radially outward beyond the impeller hub.

Abstract

Zur Verbesserung des Kondensationseffektes, insbesondere bei Flüssigkeitsringpumpen wird spaltabdichtende Flüssigkeit im Bereich der Saug- und Druckschlitze (5, 6) durch gesonderte Teilringnuten (8, 10) zwischen den Schlitzen (5, 6) und dem Wellendurchlaß (7) in jeder Steuerscheibe (3) getrennt zugeführt, wobei kalte Betriebsflüssigkeit im Bereich des Saugschlitzes über mindestens eine Öffnung (9, 9', 9") in der Steuerscheibe (3) der Teilringnut (8) und wärmere Betriebsflüssigkeit aus dem Sumpf im Seitenschild oder einem Flüssigkeitsabscheider der Teilringnut (10, 10') zuströmt.To improve the condensation effect, especially in liquid ring pumps, gap-sealing liquid in the area of the suction and pressure slots (5, 6) is separated by separate partial ring grooves (8, 10) between the slots (5, 6) and the shaft passage (7) in each control disc (3 ) fed separately, cold operating fluid in the area of the suction slot via at least one opening (9, 9 ', 9 ") in the control disk (3) of the partial ring groove (8) and warmer operating fluid from the sump in the side plate or a liquid separator of the partial ring groove (10 , 10 ') flows in.

Description

Die Erfindung betrifft eine Flüssigkeitsringmaschine mit einem innerhalb eines Gehäuses exzentrisch angeord­neten, in Eingriff mit einem rotierenden Flüssigkeits­ring umlaufenden Schaufelrad, dessen Welle in beider­seits des Gehäuses angeordneten Lagerschilden drehbar gelagert ist und wenigstens ein Lagerschild als mit Ein- und Auslässen für das zu fördernde Medium sowie mit Anschlüssen für den Flüssigkeitsring ergänzend zu­geführte Betriebsflüssigkeiten ausgebildet ist ent­sprechend dem Oberbegriff des Patentanspruches 1.The invention relates to a liquid ring machine with an eccentrically arranged within a housing, rotating in engagement with a rotating liquid ring, the shaft of which is rotatably mounted in bearing plates arranged on both sides of the housing and at least one bearing plate as with inlets and outlets for the medium to be conveyed and with Connections for the liquid ring additionally supplied operating fluids is formed according to the preamble of claim 1.

Eine solche Flüssigkeitsringmaschine ist aus der DE-AS 10 27 358 bekannt, bei der aus dem rotierenden Flüssigkeitsring hinter dem Ende des Druckschlitzes über eine Öffnung in der Steuerscheibe entsprechend erwärmte Teilflüssigkeit abgeleitet und über eine radiale Quernut einer von der Schaufelradnabe über­deckten wellenkonzentrischen Ringnut zugeleitet wird, von der aus über den ganzen Umfang der Ringnut radial diese Teilflüssigkeit als dichtende Spaltflüssigkeit wieder dem rotierenden Flüssigkeitsring zuströmt. Eine zweite, die Flüssigkeitsringverluste ersetzende kältere Teilmenge der Betriebsflüssigkeit wird von außen her mit niedrigerem Druck über eine von der Schaufelrad­nabe nicht überdeckte Öffnung zwischen dem Ende des Saugschlitzes und den Anfang des Druckschlitzes dem Flüssigkeitsring zugeführt, z.B. aus einem dem Auslaß des Steuerschildes nachgeordneten Flüssigkeitsab­scheider.Such a liquid ring machine is known from DE-AS 10 27 358, in which correspondingly heated partial liquid is drained from the rotating liquid ring behind the end of the pressure slot via an opening in the control disk and is supplied via a radial transverse groove to a shaft-concentric ring groove covered by the impeller hub, from which this partial liquid flows again radially over the entire circumference of the annular groove as a sealing gap liquid to the rotating liquid ring. A second, colder portion of the operating fluid, which replaces the fluid ring losses, is supplied to the fluid ring from the outside at a lower pressure via an opening not covered by the impeller hub between the end of the suction slot and the beginning of the pressure slot, for example from a fluid separator arranged downstream of the outlet of the control plate.

Bei anderen bekannten Pumpenausführungen (US-PS 4 545 730) wird im Seitenschild die von außen zugeführte kältere Betriebsflüssigkeitsteilmenge mit der im Sumpf des Sei­tenschildes sich sammelnden wärmeren Teilmenge aus dem Flüssigkeitsring gemischt und gemeinsam über einen ent­sprechenden Durchlaß in der Steuerscheibe dem rotieren­den Flüssigkeitsring im Gehäuse wieder zugeführt, wobei der besagte Durchlaß im Bereich zwischen Ende des Saug­schlitzes und Anfang des Druckschlitzes liegt.In other known pump designs (US Pat. No. 4,545,730), the colder operating liquid portion supplied from the outside is mixed in the side plate with the warmer part amount collecting in the sump of the side plate from the liquid ring and together via a corresponding passage in the control disk the rotating liquid ring in the housing again supplied, said passage being in the range between the end of the suction slot and the beginning of the pressure slot.

In beiden Fällen ist zumindest im Abschnitt des Saug­schlitzes die dem rotierenden Flüssigkeitsring zuge­strömte Betriebsflüssigkeitsmenge wärmer als die kühl­ste Teilflüssigkeit, was den Kondensationseffekt bei Feuchtigkeits- bzw. Wasserdampfabsaugung verschlechtert und die Ausdampfung bei Trockenluftförderung erhöht.In both cases, at least in the section of the suction slot, the amount of operating fluid flowing into the rotating liquid ring is warmer than the coolest partial liquid, which worsens the condensation effect in the case of moisture or water vapor extraction and increases evaporation when conveying dry air.

Der Erfindung liegt die Aufgabe zugrunde, bei Flüssig­keitsringmaschinen, insb. bei Pumpen der eingangs ge­nannten Art den Kondensationseffekt zu verbessern, die Ausdampfung bei Trockenluftförderung herabzusetzen und damit das Saugvermögen der Maschine zu erhöhen.The invention has for its object to improve the condensation effect in liquid ring machines, in particular in pumps of the type mentioned, to reduce the evaporation when conveying dry air and thus to increase the pumping speed of the machine.

Die Lösung der Aufgabe gelingt mit den kennzeichnenden Merkmalen des Anspruches 1.The problem is solved with the characterizing features of claim 1.

In Fig. 1 ist in explodierter Darstellung eine bekannte zweiflutige Flüssigkeitsringmaschine dargestellt, bei der die Mischung von wärmeren und kälteren Betriebs­flüssigkeitsanteilen im jeweiligen Seitenschild 1 statt­findet und die Mischung beider durch den Durchlaß 2 in der jeweiligen Steuerscheibe 3 in den Spalt zwischen Steuerscheibe 3 und Schaufelrad 4 strömt.In Fig. 1, a known double-flow liquid ring machine is shown in an exploded view, in which the mixture of warmer and colder operating liquid portions takes place in the respective side plate 1 and the mixture of both through the passage 2 in the respective control disc 3 in the gap between the control disc 3 and paddle wheel 4th flows.

Zur Erzielung des angestrebten Effektes ist die Steuer­scheibe gemäß einem Ausführungsbeispiel ausgebildet, das in Fig. 2 als Draufsicht auf die dem Schaufelrad zuge­wandte Innenseite und in Fig. 3 als Schnitt nach der Linie III-III der Fig. 2 dargestellt ist.In order to achieve the desired effect, the control disk is designed according to an exemplary embodiment, which is shown in FIG. 2 as a top view of the inside facing the paddle wheel and in FIG. 3 as a section along the line III-III of FIG. 2.

Im Bereich zwischen einem einteiligen Saugschlitz 5 und einem Wellendurchlaß 7 ist eine Teilringnut 8 vorge­sehen, die mit mindestens einer Öffnung 9, 9ʺ in Ver­bindung steht und diese Öffnung 9 in eine getrennte Kammer im Seitenschild mündet, welche Kammer ausschließ­lich mit einem Kühlflüssigkeitseinlaß verbunden, an den eine Frischwasserleitung oder ein Flüssigkeitsabscheider über einen Rückkühler hinter den Auslaßnuten im Seiten­schild angeschlossen ist.In the area between a one-piece suction slot 5 and a shaft passage 7, a partial annular groove 8 is provided, which is connected to at least one opening 9, 9ʺ and this opening 9 opens into a separate chamber in the side plate, which chamber is connected only to a coolant inlet to the a fresh water line or a liquid separator is connected via a recooler behind the outlet grooves in the side plate.

Die Teilringnut 8 erstreckt sich mindestens über den gesamten Bereich des Saugschlitzes 5 und kann am einem Ende 8A hinter dem Ende des Saugschlitzes aus dem Schaufelradnabenbereich herausgeführt sein. Weiterhin kann die Teilringnut über den Anfang des Saugschlitzes verlängert und gegebenenfalls wie gestrichelt darge­stellt aus dem Schaufelradnabenbereich geführt und dort mit einer Öffnung 9ʹ verbunden sein. Der oder die Öff­nungen 9, 9ʹ, 9ʺ können vorteilhafterweise am besagten Ende 8A der Teilringnut 8 vorgesehen sein, damit über den ganzen Saugschlitz 5 in Richtung der Schaufelrad­drehung und nach außen ein möglichst gleichmäßig ver­teilter kalter Spaltflüssigkeitsanteil strömt, der den Kondensationseffekt optimiert.The partial ring groove 8 extends at least over the entire area of the suction slot 5 and can be led out of the impeller hub area at one end 8A behind the end of the suction slot. Furthermore, the partial ring groove can be extended beyond the beginning of the suction slot and optionally, as shown in broken lines, can be guided out of the paddle wheel hub area and connected there with an opening 9 Öffnung. The one or more openings 9, 9ʹ, 9ʺ can advantageously be provided at said end 8A of the partial annular groove 8, so that a cold, evenly distributed cold fissure liquid portion flows over the entire suction slot 5 in the direction of the paddle wheel rotation and optimizes the condensation effect.

Zwischen einem ein- oder wie dargestellt mehrteiligem Druckschlitz 6 und dem Wellendurchlaß 7 ist eine geson­derte Teilringnut 10, 10ʹ vorgesehen, die sich minde­ stens von Anfang des Druckschlitzes 6 bis höchstens vor dem Ende derselben insbesondere bis zu steuerbaren Teil­bereichen erstreckt und mit mindestens einer Öffnung 11, 11ʹ in Verbindung steht, die in eine gesonderte Kammer im Seitenschild, einem Abscheider oder den rotierenden Flüssigkeitsring mündet, durch welche in bekannter Weise wärmere Flüssigkeit in den Flüssigkeitsring fließt, so daß von dieser Kammer über die Öffnung 11 und die Teilringnut 10, 10ʹ die Spaltabdichtflüssigkeiten wieder in den Flüssigkeitsring zurückgeführt werden.Between a one-part or as shown multi-part pressure slot 6 and the shaft passage 7, a separate ring groove 10, 10ʹ is provided, which is at least least from the beginning of the pressure slot 6 to at most before the end of the same, in particular up to controllable partial areas and with at least one opening 11, 11ʹ is connected, which opens into a separate chamber in the side plate, a separator or the rotating liquid ring, through which in known Way warmer liquid flows into the liquid ring, so that from this chamber via the opening 11 and the partial ring groove 10, 10ʹ the gap sealing liquids are returned to the liquid ring.

Die Öffnung 11 ist von der Schaufelradnabe überdeckt und kann mit einer Nische 11A in Verbindung stehen, die sich über die Schaufelradnabe hinaus radial nach außen erstreckt.The opening 11 is covered by the impeller hub and can be connected to a recess 11A which extends radially outward beyond the impeller hub.

Claims (6)

1) Flüssigkeitsringmaschine mit einem innerhalb eines Gehäuses exzentrisch angeordneten in Eingriff mit einem rotierenden Flüssigkeitsring umlaufenden Schaufelrad, dessen Welle in beiderseits des Gehäuses angeordneten Lagerschilden drehbar gelagert ist und wenigstens ein Lagerschild als mit Ein- und Auslässen für das zu för­dernde Medium sowie mit Anschlüssen für dem Flüssig­keitsring ergänzend zugeführte Betriebsflüssigkeiten ausgebildet ist und zwischen ihm und dem Gehäuse eine mit Saug- und Druckschlitzen sowie Öffnungen für die getrennte Zuführung von unterschiedlich warmen Betriebs­flüssigkeiten versehene Steuerscheibe abgedichtet ange­ordnet ist, wobei die Öffnung für die Zuführung der wärmeren Betriebsflüssigkeiten in eine von der Schaufel­radnabe überdeckte, konzentrisch zwischen Welle und Druckschlitz angeordnete Nut mündet und konzentrisch zwischen dem Saugschlitz und der Welle eine ebenfalls von der Schaufelradnabe überdeckte Nut vorgesehen ist,
dadurch gekennzeichnet,
daß beide Nuten (8, 10) als voneinander getrennte Nuten ausgebildet und die dem Saugschlitz (5) benachbarte Nut (8) mit mindestens einer über den Seitenschild von kal­ter Betriebsflüssigkeit beaufschlagten Öffnung (9, 9ʹ, 9ʺ) und die dem Druckschlitz (6) benachbarte Nut (10, 10ʹ) mit mindestens einer über den Seitenschild von er­wärmter Betriebsflüssigkeit beaufschlagten Öffnung in Verbindung steht, so daß dem Saugschlitz (5) ausschließ­lich kalte und dem Druckschlitz (6) ausschließlich er­wärmte Betriebsflüssigkeit als Spaltflüssigkeit zu­strömt.1) Liquid ring machine with an eccentrically arranged within a housing in engagement with a rotating liquid ring rotating blade wheel, the shaft of which is rotatably mounted in bearing plates arranged on both sides of the housing and at least one bearing plate as with inlets and outlets for the medium to be conveyed and with connections for the Liquid ring supplementary supplied operating fluids is formed and between it and the housing is arranged sealed with suction and pressure slots and openings for the separate supply of different warm operating fluids control disc, the opening for the supply of warmer operating fluids in a covered by the paddle wheel hub, The groove arranged concentrically between the shaft and the pressure slot opens and a groove is also provided concentrically between the suction slot and the shaft, which is also covered by the impeller hub.
characterized by
that both grooves (8, 10) are formed as separate grooves and the groove (8) adjacent to the suction slot (5) has at least one opening (9, 9ʹ, 9ʺ) which is exposed to cold operating fluid via the side plate and the pressure slot (6) Adjacent groove (10, 10ʹ) communicates with at least one opening acted upon by the side plate of heated operating fluid, so that only cold operating fluid flows into the suction slot (5) and heated operating fluid flows exclusively as the cracking fluid (6). 2) Flüssigkeitsringmaschine nach Anspruch 1,
dadurch gekennzeichnet,
daß die Nuten (8, 10, 10ʹ) als Teilringnuten ausgebildet und zumindest über einen Teil der Länge der benachbarten Schlitze (5, 6) erstreckt sind.2) liquid ring machine according to claim 1,
characterized by
that the grooves (8, 10, 10ʹ) are designed as partial ring grooves and extend over at least part of the length of the adjacent slots (5, 6). 3) Flüssigkeitsringmaschine nach Anspruch 2,
dadurch gekennzeichnet,
daß die dem Saugschlitz (5) benachbarte Teilringnut (8) am Saugschlitzende (8A) nach außen aus dem Schaufelrad­nabenbereich ragend abgebogen ist.3) liquid ring machine according to claim 2,
characterized by
that the partial annular groove (8) adjacent to the suction slot (5) is bent outward at the end of the suction slot (8A) and protrudes outward from the impeller hub area. 4) Flüssigkeitsringmaschine nach Anspruch 2 oder 3,
dadurch gekennzeichnet,
daß sich die Teilringnut über den Saugschitzanfang hin­aus erstreckt und nach außen aus dem Schaufelradnaben­bereich ragend abgebogen und dort mit der Öffnung (9ʹ) verbunden ist.4) liquid ring machine according to claim 2 or 3,
characterized by
that the partial ring groove extends beyond the beginning of the suction port and is bent outwards from the paddle wheel hub area, where it is connected to the opening (9ʹ). 5) Flüssigkeitsringmaschine nach Anspruch 2,
dadurch gekennzeichnet,
daß sich die dem Druckschlitz (6) benachbarte Teilring­nut (10, 10ʹ) über den Druckschlitzanfang hinaus in Richtung Saugschlitz erstreckt und mit einer Öffnung (11) zur Zuführung der wärmeren Betriebsflüssigkeit verbunden ist, die mit einer kommunizierenden Nische (11A) radial über die Schaufelradnabe vorragt.5) liquid ring machine according to claim 2,
characterized by
that the partial groove (10, 10 Teil) adjacent to the pressure slot (6) extends beyond the beginning of the pressure slot in the direction of the suction slot and is connected to an opening (11) for supplying the warmer operating fluid, which communicates radially over the impeller hub with a communicating recess (11A) protrudes. 6) Flüssigkeitsringmaschine nach Anspruch 1 bis 5 mit einem in steuerbare Teilbereiche unterteilten Druck­schlitz,
dadurch gekennzeichnet,
daß die Teilringnut (10, 10ʹ) sich von der Öffnung (11, 11ʹ) höchstens nur bis zum Ende der Teilbereiche des Druckschlitzes (6) erstreckt.6) liquid ring machine according to claim 1 to 5 with a pressure slot divided into controllable partial areas,
characterized by
that the partial ring groove (10, 10ʹ) extends from the opening (11, 11ʹ) at most only to the end of the partial areas of the pressure slot (6).
EP87104438A 1986-05-14 1987-03-25 Liquid-ring machine Expired - Lifetime EP0245626B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3616298 1986-05-14
DE3616298 1986-05-14

Publications (3)

Publication Number Publication Date
EP0245626A2 true EP0245626A2 (en) 1987-11-19
EP0245626A3 EP0245626A3 (en) 1988-09-28
EP0245626B1 EP0245626B1 (en) 1990-01-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104438A Expired - Lifetime EP0245626B1 (en) 1986-05-14 1987-03-25 Liquid-ring machine

Country Status (3)

Country Link
US (1) US4755107A (en)
EP (1) EP0245626B1 (en)
DE (1) DE3761581D1 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO1993022562A1 (en) * 1992-05-06 1993-11-11 Siemens Aktiengesellschaft Liquid ring machine

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GB8816296D0 (en) * 1988-07-08 1988-08-10 Caradon Mira Ltd Pump
DE3867068D1 (en) * 1988-11-07 1992-01-30 Siemens Ag LIQUID RING PUMP.
US5345771A (en) * 1993-03-25 1994-09-13 John Zink Company, A Division Of Koch Engineering Company, Inc. Process for recovering condensable compounds from inert gas-condensable compound vapor mixtures
DE9406597U1 (en) * 1994-04-20 1995-08-24 Sihi Gmbh & Co Kg Liquid ring gas pump
CN1079503C (en) * 1995-08-16 2002-02-20 西门子公司 Ring liquid compression engine
US6106239A (en) * 1997-11-14 2000-08-22 Vooner Vacuum Pumps, Inc. Air flow apparatus for liquid ring vacuum pump
FR2979659A1 (en) * 2011-09-01 2013-03-08 Rene Snyders Rotor for use in rotary volumetric machine, has hub that is defined on its two sides by obturators, where each obturator includes inlet and outlet openings for allowing passage of fluid to distribute axial loads on two sides of rotor
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
KR20170108031A (en) * 2015-01-08 2017-09-26 가드너 덴버 내쉬 엘엘씨 Compressor Type Low Pressure Seal Liquid Inlet Area of Liquid Ring Pump
CN109356850A (en) * 2018-12-17 2019-02-19 武汉艾德沃泵阀有限公司 A kind of novel water ring vacuum pump

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DE1027358B (en) * 1955-02-08 1958-04-03 Siemens Ag Liquid ring pump
US4545730A (en) * 1981-06-24 1985-10-08 Siemens Aktiengesellschaft Liquid ring vacuum pump for gaseous media

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US2195174A (en) * 1935-12-30 1940-03-26 Irving C Jennings Pump
US2195375A (en) * 1935-12-30 1940-03-26 Nash Engineering Co Pump
GB1509661A (en) * 1976-02-11 1978-05-04 Grayden Pty Ltd P Water ring vacuum pumps
US4254305A (en) * 1979-02-07 1981-03-03 International Telephone And Telegraph Corporation Current limited subscriber line feed circuit
SU1121500A1 (en) * 1983-06-29 1984-10-30 Предприятие П/Я А-3605 Fluid-ring machine
JPS6131686A (en) * 1984-07-23 1986-02-14 Fuji Electric Co Ltd Water sealing pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1027358B (en) * 1955-02-08 1958-04-03 Siemens Ag Liquid ring pump
US4545730A (en) * 1981-06-24 1985-10-08 Siemens Aktiengesellschaft Liquid ring vacuum pump for gaseous media

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993022562A1 (en) * 1992-05-06 1993-11-11 Siemens Aktiengesellschaft Liquid ring machine

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Publication number Publication date
US4755107A (en) 1988-07-05
DE3761581D1 (en) 1990-03-08
EP0245626A3 (en) 1988-09-28
EP0245626B1 (en) 1990-01-31

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