EP0517277A1 - Liquid ring gas pump with overhanging impeller - Google Patents

Liquid ring gas pump with overhanging impeller Download PDF

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Publication number
EP0517277A1
EP0517277A1 EP92109682A EP92109682A EP0517277A1 EP 0517277 A1 EP0517277 A1 EP 0517277A1 EP 92109682 A EP92109682 A EP 92109682A EP 92109682 A EP92109682 A EP 92109682A EP 0517277 A1 EP0517277 A1 EP 0517277A1
Authority
EP
European Patent Office
Prior art keywords
impeller
pump
suction
ring gas
hub bore
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
EP92109682A
Other languages
German (de)
French (fr)
Other versions
EP0517277B1 (en
Inventor
Udo Segebrecht
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.)
Sihi GmbH and Co KG
Original Assignee
Sihi GmbH and Co KG
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 Sihi GmbH and Co KG filed Critical Sihi GmbH and Co KG
Publication of EP0517277A1 publication Critical patent/EP0517277A1/en
Application granted granted Critical
Publication of EP0517277B1 publication Critical patent/EP0517277B1/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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/086—Sealings especially adapted for liquid pumps
    • 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
    • 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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention relates to a single-stage liquid-ring gas pump with an overhung impeller (3) and a casing (7) with a suction and a discharge chamber, and suction and discharge connections on the side of the pump facing away from the drive. The continuous hub bore (13) of the impeller (3) in this arrangement is closed and sealed on the side facing away from the motor by appropriate measures, as a result of which the shaft connection can no longer be wetted by the hydraulic fluid of the pump or by the pump medium and corrosion is thus precluded. <IMAGE>

Description

Die Neuerung bezieht sich auf eine einstufige Flüssigkeitsringgaspumpe mit fliegend gelagertem Flügelrad und einem Gehäuse mit Saug- und Druckraum sowie Saug- und Druckstutzen an der antriebsfernen Seite der Pumpe.The innovation relates to a single-stage liquid ring gas pump with a floating impeller and a housing with suction and pressure chamber as well as suction and pressure ports on the side of the pump that is remote from the drive.

Bei diesen Pumpen ist das Flügelrad auf einen Motorwellenstumpf aufgesetzt und bei kleineren Pumpen schwimmend, d. h. axial beweglich angeordnet. Bei größeren Pumpen empfiehlt es sich, das Flügelrad festzusetzen, um eine genaue axiale Fixierung zwischen den Steuerscheiben bzw. zwischen Steuerscheibe und Pumpengehäusewand zu gewährleisten. Da bei den normalen Fertigungsmethoden die Nabenbohrung des Flügelrades durchgehend ist und der Motorwellenstumpf normalerweise aus rostanfälligem Material besteht, ist die Notwendigkeit gegeben, auf der antriebsfernen Seite die Flügelradbohrung dichtzusetzen. Üblicherweise geschieht das durch einen eingeklemmten oder eingeschrumpften Verschlußdeckel, der bei kleineren Pumpen eine ausreichende Dichtheit gewährleistet, so daß keine Flüssigkeit von der antriebsfernen Seite über diesen Verschluß an die Motor- bzw. kombinierte Motorpumpenwelle gelangen kann.In these pumps, the impeller is placed on a motor shaft stub and floating in smaller pumps, i. H. axially movable. For larger pumps it is advisable to fix the impeller in order to ensure an exact axial fixation between the control discs or between the control disc and the pump housing wall. Since the hub bore of the impeller is continuous in the normal production methods and the motor shaft stump is usually made of rust-prone material, there is a need to seal the impeller bore on the side remote from the drive. This is usually done by a clamped or shrunk-in closure cap, which ensures sufficient tightness in smaller pumps, so that no liquid can reach the motor or combined motor pump shaft from the drive-distant side via this closure.

Bei größeren Pumpen jedoch ist diese Art der Nabenbohrungsabdichtung problematisch bzw. nicht ausreichend oder sicher genug, so daß Flüssigkeit durch die Nabenbohrungsabdeckung hindurch an den Wellenstumpf gelangt, hier zu Rostschäden führt und die Welle beschädigt bzw. durch Korrosion zur Zerstörung des Paßsitzes des Flügelrades führt und letztendlich zum Ausfall der Pumpe. Es kann auch durch Spaltkorrosion zum Festrosten des Flügelrades kommen, das bei einer später notwendigen Demontage dann nicht mehr von der Welle zu lösen ist.With larger pumps, however, this type of hub bore seal is problematic or insufficient or safe enough so that liquid gets through the hub bore cover to the stub shaft, here leads to rust damage and damages the shaft or leads to destruction of the fit of the impeller by corrosion and ultimately to the failure of the pump. Crevice corrosion can also cause the impeller to rust, which can then no longer be removed from the shaft if it is necessary to dismantle it later.

Aufgabe der Erfindung ist es, für solche Pumpen eine Abdichtung der Nabenbohrung des Flügelrades zur antriebsfernen Seite hin eine ausreichende und dichte Abdeckung zu schaffen, die eine Beschädigung des Wellenstumpfes durch Flüssigkeit oder Medium der Flüssigkeitsringgaspumpe ausschließt.The object of the invention is to provide for such pumps a seal of the hub bore of the impeller to the drive-remote side a sufficient and tight cover that excludes damage to the stub shaft by liquid or medium of the liquid ring gas pump.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß das Flügelrad mit durchgehender Nabenbohrung zur Saug- und Druckraumgehäuseseite der Flüssigkeitsringgaspumpe hin mit einer Abdeckplatte verschlossen ist, die mittels einer Dichtung den Innenraum der Nabenbohrung gegenüber dem Saug- und Druckraum der Pumpe abdichtet und die mittels Schrauben an der Flügelradnabe befestigt ist. Dabei muß die Dichtung dieser Abdeckplatte sowohl am radial äußeren Umfang, vorzugsweise mit flüssiger Dichtung, sowie auch flächenmäßig mittels flüssiger Dichtung oder Papierdichtung gegenüber dem Wellenstumpfende des Motors vorgenommen werden. Durch die absolut feste Verbindung mittels Verschraubung der Dichtplatte im Wellenstumpf erreicht man, daß auch bei längerer Betriebszeit diese Abdeckplatte in der Nabenbohrung des Flügelrades die Dichtheit vom Pumpendruck-/Saugraumgehäuse zum Wellenstumpf gesichert bleibt und eine Korrosion des Wellenstumpfes durch die Betriebsflüssigkeit oder aber das Fördermedium vermieden wird.According to the invention, this object is achieved in that the impeller with a continuous hub bore to the suction and pressure chamber housing side of the liquid ring gas pump is closed with a cover plate which seals the interior of the hub bore against the suction and pressure chamber of the pump by means of a seal and which by means of screws on the Impeller hub is attached. The cover plate must be sealed both on the radially outer circumference, preferably with a liquid seal, and also in terms of area by means of a liquid seal or paper seal relative to the stub shaft end of the motor. Due to the absolutely firm connection by screwing the sealing plate into the stub shaft, this cover plate remains sealed in the hub bore of the impeller, even with a longer operating time, the tightness from the pump pressure / suction chamber housing to the stub shaft is prevented and corrosion of the stub shaft by the operating fluid or the pumped medium is avoided becomes.

Anhand der beigefügten Zeichnung sei die Erfindung beispielsweise dargestellt.The invention is illustrated, for example, with reference to the accompanying drawing.

Figur I zeigt im Schnitt eine Flüssigkeitsringgaspumpe, die an einen Elektromotor 1 als Blockpumpe angeflanscht ist. Im Pumpenmittelkörper 2 rotiert das Flügelrad 3, das auf der Pumpenwelle 4 befestigt ist. Der Wellendurchtritt durch das Pumpengehäuse wird durch die Gleitringdichtung 5 abgedichtet. Zur motorfernen Seite hin liegt die Steuerscheibe 6 und daran anschließend das Pumpengehäuse 7, das Lauf- und Druckstutzen sowie Saug- und Druckraum und auch die Pumpenfüße enthält. Die Nabenbohrung des Flügelrades geht durch das ganze Flügelrad hindurch und auf der zum Deckel 7 hin offenen Seite ist diese Nabenbohrung durch eine Deckplatte 8 abgedichtet, die mittels Schrauben 9 fest mit der Flügelradnabe verbunden ist.Figure I shows in section a liquid ring gas pump which is flanged to an electric motor 1 as a block pump. The impeller 3, which is fastened on the pump shaft 4, rotates in the pump center body 2. The shaft passage through the pump housing is sealed by the mechanical seal 5. The control disk 6 is located on the side remote from the motor, and then the pump housing 7, which contains the running and pressure ports as well as the suction and pressure chamber and also the pump feet. The hub bore of the impeller passes through the entire impeller and on the side open towards the cover 7 this hub bore is sealed by a cover plate 8 which is firmly connected to the impeller hub by means of screws 9.

An den Anlageflächen 10, 11 und 12 sind Dichtungen vorgesehen, in diesem Falle vorzugsweise flüssige Dichtmassen, die an diesen Stellen verhindern, daß Betriebsflüssigkeit oder Fördermedium aus irgendwelchen Räumen des Gehäusedeckels 7 in die Nabenbohrung 13 des Flügelrades 3 hineingelangen und hier zwischen Wellenstumpf und Flügelrad bzw. an der Welle allein Korrosion verursachen können. Der Vollständigkeit halber sei nur noch erwähnt, daß mittels der Schraube 14 die axiale Stellung des Flügelrades 3 zwischen Steuerscheibe 6 und der Rückwand des Mittelkörpers 2 fixiert werden kann, d. h., daß das Spiel zwischen Flügelrad, Steuerscheibe und Mittelkörperrückwand genau einstellbar ist.Seals are provided on the contact surfaces 10, 11 and 12, in this case preferably liquid sealing compounds, which at these points prevent operating fluid or pumped medium from entering any spaces in the housing cover 7 into the hub bore 13 of the impeller 3 and here between the stub shaft and the impeller or can cause corrosion on the shaft alone. For the sake of completeness, it should only be mentioned that the axial position of the impeller 3 between the control disk 6 and the rear wall of the central body 2 can be fixed by means of the screw 14, i. That is, that the game between the impeller, control disc and center body rear wall is precisely adjustable.

Die Erfindung ist nicht auf die beispielsweise dargestellte Ausführungsform beschränkt. Es sind auch Varianten und Abarten möglich.The invention is not limited to the embodiment shown as an example. Variants and varieties are also possible.

Claims (1)

Einstufige Flüssigkeitringgaspumpe mit fliegend gelagertem Flügelrad (3) und einem Gehäuse (7) mit Saug- und Druckraum sowie Saug- und Druckstutzen an der antriebsfernen Seite der Pumpe,

dadurch gekennzeichnet,

daß das Flügelrad (3) eine durchgehende Nabenbohrung (13) besitzt und diese Nabenbohrung zur Druck-/Saugraumgehäuseseite hin mit einer Abdeckplatte (8) verschlossen ist, die mittels einer Dichtung den Innenraum der Nabenbohrung (13) gegenüber dem Saug- und Druckraum der Pumpe abdichtet und die mittels Schrauben (9) an der Flügelradnabe befestigt ist.Single-stage liquid ring gas pump with a floating impeller (3) and a housing (7) with suction and pressure chamber as well as suction and pressure ports on the side of the pump remote from the drive,

characterized,

that the impeller (3) has a continuous hub bore (13) and this hub bore is closed towards the pressure / suction chamber housing side with a cover plate (8) which seals the interior of the hub bore (13) with respect to the suction and pressure chamber of the pump seals and which is attached to the impeller hub by means of screws (9).
EP92109682A 1991-06-07 1992-06-09 Liquid ring gas pump with overhanging impeller Expired - Lifetime EP0517277B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4118844 1991-06-07
DE4118844A DE4118844A1 (en) 1991-06-07 1991-06-07 LIQUID RING GAS PUMP WITH FLY BEARING WHEEL

Publications (2)

Publication Number Publication Date
EP0517277A1 true EP0517277A1 (en) 1992-12-09
EP0517277B1 EP0517277B1 (en) 1996-05-15

Family

ID=6433468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92109682A Expired - Lifetime EP0517277B1 (en) 1991-06-07 1992-06-09 Liquid ring gas pump with overhanging impeller

Country Status (6)

Country Link
EP (1) EP0517277B1 (en)
AT (1) ATE138161T1 (en)
DE (2) DE4118844A1 (en)
DK (1) DK0517277T3 (en)
ES (1) ES2088047T3 (en)
GR (1) GR3020531T3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19727719C1 (en) * 1997-06-30 1998-06-25 Siemens Ag Rotary fluid pump for miniature vacuum pump
EP0945621A1 (en) 1998-03-24 1999-09-29 Siemens Aktiengesellschaft Liquid ring compressor
CN100414107C (en) * 2003-05-07 2008-08-27 喷射器股份有限公司 Screw type liquid ring pump
WO2015035625A1 (en) * 2013-09-15 2015-03-19 Gao Hanwen Sealing ring maintaining gap
CN105464979A (en) * 2015-12-28 2016-04-06 昂伯（上海）真空设备有限公司 Single-stage water ring type vacuum pump

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758446C (en) * 1941-03-30 1953-02-16 Wesselinger Gusswerk Rheinguss Device for fastening a centrifugal pump impeller made of corrosion-resistant material, in particular high-percentage cast silicon, on the shaft
DE1083484B (en) * 1956-07-27 1960-06-15 Nash Engineering Co Liquid ring pump or compressor
FR1254761A (en) * 1960-04-22 1961-02-24 Basf Ag Assembly of machine parts with shafts or axes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2022104C3 (en) * 1969-05-09 1979-02-08 The Nash Engineering Co., Norwalk, Conn. (V.St.A.) Motor-driven liquid ring pump

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758446C (en) * 1941-03-30 1953-02-16 Wesselinger Gusswerk Rheinguss Device for fastening a centrifugal pump impeller made of corrosion-resistant material, in particular high-percentage cast silicon, on the shaft
DE1083484B (en) * 1956-07-27 1960-06-15 Nash Engineering Co Liquid ring pump or compressor
FR1254761A (en) * 1960-04-22 1961-02-24 Basf Ag Assembly of machine parts with shafts or axes

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19727719C1 (en) * 1997-06-30 1998-06-25 Siemens Ag Rotary fluid pump for miniature vacuum pump
WO1999001668A1 (en) 1997-06-30 1999-01-14 Siemens Aktiengesellschaft Liquid ring pump
US6287082B1 (en) 1997-06-30 2001-09-11 Siemens Aktiengesellschaft Liquid ring pump
EP0945621A1 (en) 1998-03-24 1999-09-29 Siemens Aktiengesellschaft Liquid ring compressor
DE19812976A1 (en) * 1998-03-24 1999-09-30 Siemens Ag Liquid ring compressor
DE19812976C2 (en) * 1998-03-24 2000-05-04 Siemens Ag Liquid ring compressor
CN100414107C (en) * 2003-05-07 2008-08-27 喷射器股份有限公司 Screw type liquid ring pump
WO2015035625A1 (en) * 2013-09-15 2015-03-19 Gao Hanwen Sealing ring maintaining gap
CN105464979A (en) * 2015-12-28 2016-04-06 昂伯（上海）真空设备有限公司 Single-stage water ring type vacuum pump

Also Published As

Publication number Publication date
DK0517277T3 (en) 1996-09-30
DE4118844A1 (en) 1992-12-10
ATE138161T1 (en) 1996-06-15
ES2088047T3 (en) 1996-08-01
DE59206273D1 (en) 1996-06-20
EP0517277B1 (en) 1996-05-15
GR3020531T3 (en) 1996-10-31

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