EP0517277B1 - Liquid ring gas pump with overhanging impeller - Google Patents

Liquid ring gas pump with overhanging impeller Download PDF

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Publication number
EP0517277B1
EP0517277B1 EP92109682A EP92109682A EP0517277B1 EP 0517277 B1 EP0517277 B1 EP 0517277B1 EP 92109682 A EP92109682 A EP 92109682A EP 92109682 A EP92109682 A EP 92109682A EP 0517277 B1 EP0517277 B1 EP 0517277B1
Authority
EP
European Patent Office
Prior art keywords
impeller
pump
suction
ring gas
shaft
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 - Lifetime
Application number
EP92109682A
Other languages
German (de)
French (fr)
Other versions
EP0517277A1 (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

Definitions

  • the invention relates to a single-stage liquid ring gas pump with an impeller that is overhung on a shaft and a housing with a suction and / or pressure chamber as well as suction and / or pressure ports on the side of the pump remote from the drive, in which the impeller has a continuous hub bore that is used for pressure /
  • the suction chamber housing side is closed with a cover plate.
  • a gland-like seal between the shaft and the impeller hub (FR-A 1254761), in which a made of plastically deformable Material of the existing sealing ring is deformed by the axial tightening of the glasses in such a way that it not only causes tightness, but also torque transmission.
  • the glasses can be tightened using screws that interact either with the shaft or with the hub of the impeller. This arrangement does not allow axial adjustment of the impeller and also requires too much space in the axial direction.
  • the invention is therefore based on the object of creating a liquid ring gas pump of the type mentioned, in which both the sealing of the hub bore and the axial adjustability of the impeller are made possible with simple means without any significant additional space requirement.
  • a cover plate seals the hub bore from the suction or pressure chamber of the pump, is attached to the impeller hub by means of screws and is connected to the shaft via a screw for adjusting the axial position of the impeller.
  • Fig. I shows in section a liquid ring gas pump which is flanged to an electric motor 1 as a block pump.
  • 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 it is sealed by a cover plate 8 which is firmly connected to the impeller hub by means of screws 9.
  • 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 space 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 only cause corrosion on the shaft.
  • the axial position of the impeller 3 can be fixed between the control disk 6 and the rear wall of the central body 2 by means of the screw 14. This means that the play between the impeller, control disc and rear wall of the center body can be adjusted exactly.

Landscapes

  • 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 Erfindung betrifft eine einstufige Flüssigkeitsringgaspumpe mit auf einer Welle fliegend gelagertem Flügelrad und einem Gehäuse mit Saug- und/oder Druckraum sowie Saug- und/oder Druckstutzen an der antriebsfernen Seite der Pumpe, bei der das Flügelrad eine durchgehende Nabenbohrung besitzt, die zur Druck-/Saugraumgehäuseseite hin mit einer Abdeckplatte verschlossen ist.The invention relates to a single-stage liquid ring gas pump with an impeller that is overhung on a shaft and a housing with a suction and / or pressure chamber as well as suction and / or pressure ports on the side of the pump remote from the drive, in which the impeller has a continuous hub bore that is used for pressure / The suction chamber housing side is closed with a cover plate.

Bei einer bekannten Pumpe dieser Art (DE-B 1083484) ist die Nabenbohrung nicht hinreichend gegenüber der im Gehäuse enthaltenen Flüssigkeit abgedichtet. Dies ist jedoch erforderlich, weil es anderenfalls zu Rostschäden an der Welle und aufgrund von Korrosion zur Zerstörung des Paßsitzes des Flügelrads kommen kann. Es kann auch zu Spaltkorrosion und zum Festrosten des Flügelrads kommen, das dann bei einer später notwendigen Montage nicht mehr von der Welle zu lösen ist. Bei kleinen Pumpen kann ein eingeklemmter oder eingeschrumpfter Verschlußdeckel ausreichende Dichtheit gewährleisten. Bei größeren Pumpen ist diese Art der Nabenbohrungsabdichtung jedoch nicht sicher genug und in den Fällen, in denen eine genaue axiale Fixierung des Flügelrads gegenüber der Welle erforderlich ist, auch nicht anwendbar. Bekannt ist auch eine stopfbüchsenartige Abdichtung zwischen Welle und Flügelradnabe (FR-A 1254761), bei der ein aus plastisch verformbarem Material bestehender Dichtring durch den axialen Anzug der Brille so verformt wird, daß er nicht nur Dichtheit bewirkt, sondern auch die Drehmomentübertragung. Dabei kann der Anzug der Brille mittels Schrauben erfolgen, die entweder mit der Welle oder mit der Nabe des Flügelrads zusammenwirken. Diese Anordnung erlaubt keine axiale Einstellung des Flügelrads und hat in axialer Richtung auch einen zu großen Platzbedarf.In a known pump of this type (DE-B 1083484), the hub bore is not sufficiently sealed against the liquid contained in the housing. However, this is necessary because otherwise damage to the shaft due to rust and corrosion can destroy the fit of the impeller. There may also be crevice corrosion and rusting of the impeller, which can then no longer be removed from the shaft if it is necessary to install it later. With small pumps, a clamped or shrunk-on sealing cap can ensure sufficient tightness. In the case of larger pumps, however, this type of hub bore seal is not secure enough and cannot be used in cases in which an exact axial fixation of the impeller with respect to the shaft is required. Also known is a gland-like seal between the shaft and the impeller hub (FR-A 1254761), in which a made of plastically deformable Material of the existing sealing ring is deformed by the axial tightening of the glasses in such a way that it not only causes tightness, but also torque transmission. The glasses can be tightened using screws that interact either with the shaft or with the hub of the impeller. This arrangement does not allow axial adjustment of the impeller and also requires too much space in the axial direction.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Flüssigkeitsringgaspumpe der eingangs genannten Art zu schaffen, bei der sowohl die Abdichtung der Nabenbohrung als auch die axiale Einstellbarkeit des Flügelrads mit einfachen Mitteln ohne wesentlichen zusätzlichen Platzbedarf ermöglicht werden.The invention is therefore based on the object of creating a liquid ring gas pump of the type mentioned, in which both the sealing of the hub bore and the axial adjustability of the impeller are made possible with simple means without any significant additional space requirement.

Die erfindungsgemäße Lösung besteht darin, daß eine Abdeckplatte die Nabenbohrung gegenüber dem Saug- bzw. Druckraum der Pumpe abdichtet, mittels Schrauben an der Flügelradnabe befestigt ist und mit der Welle über eine Schraube zur Einstellung der axialen Stellung des Flügelrads verbunden ist.The solution according to the invention is that a cover plate seals the hub bore from the suction or pressure chamber of the pump, is attached to the impeller hub by means of screws and is connected to the shaft via a screw for adjusting the axial position of the impeller.

Die Erfindung wird im folgenden anhand der Zeichnung beispielsweise beschrieben.The invention is described below with reference to the drawing, for example.

Fig. 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 sie durch eine Deckplatte 8 abgedichtet, die mittels Schrauben 9 fest mit der Flügelradnabe verbunden ist.Fig. 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 it 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. Mittels der Schraube 14 kann die axiale Stellung des Flügelrades 3 zwischen der Steuerscheibe 6 und der Rückwand des Mittelkörpers 2 fixiert werden. 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 space 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 only cause corrosion on the shaft. The axial position of the impeller 3 can be fixed between the control disk 6 and the rear wall of the central body 2 by means of the screw 14. This means that the play between the impeller, control disc and rear wall of the center body can be adjusted exactly.

Claims (1)

  1. A single-stage liquid ring gas pump with an impeller (3) mounted overhung on a shaft (4) and with a housing (7) having a suction chamber and/or delivery chamber, as well as a suction connection and/or pressure connection on the side of the pump remote from the drive, in which the impeller (3) has a continuous hub bore (13) which is closed by a cover plate (8) towards the delivery/suction chamber housing side, characterised in that the cover plate (8) seals the hub bore (13) with respect to the suction chamber and/or delivery chamber of the pump, is fastened by means of screws (9) to the impeller hub and is connected to the shaft (4) via a screw (14) for adjusting the axial position of the impeller (3).
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 EP0517277A1 (en) 1992-12-09
EP0517277B1 true 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)

Families Citing this family (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
DE19812976C2 (en) 1998-03-24 2000-05-04 Siemens Ag Liquid ring compressor
NO318776B1 (en) * 2003-05-07 2005-05-02 Jets As Screw-type liquid pump pump device
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

Family Cites Families (4)

* 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
DE2022104C3 (en) * 1969-05-09 1979-02-08 The Nash Engineering Co., Norwalk, Conn. (V.St.A.) Motor-driven liquid ring pump

Also Published As

Publication number Publication date
ES2088047T3 (en) 1996-08-01
DE4118844A1 (en) 1992-12-10
ATE138161T1 (en) 1996-06-15
EP0517277A1 (en) 1992-12-09
GR3020531T3 (en) 1996-10-31
DK0517277T3 (en) 1996-09-30
DE59206273D1 (en) 1996-06-20

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