EP0061626B1 - Liquid-ring pump with a control disc mounted between an impeller casing and a cover comprising the fluid connexions - Google Patents

Liquid-ring pump with a control disc mounted between an impeller casing and a cover comprising the fluid connexions Download PDF

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Publication number
EP0061626B1
EP0061626B1 EP82102023A EP82102023A EP0061626B1 EP 0061626 B1 EP0061626 B1 EP 0061626B1 EP 82102023 A EP82102023 A EP 82102023A EP 82102023 A EP82102023 A EP 82102023A EP 0061626 B1 EP0061626 B1 EP 0061626B1
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EP
European Patent Office
Prior art keywords
cover
control disk
valve
ring pump
liquid
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
EP82102023A
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German (de)
French (fr)
Other versions
EP0061626A1 (en
Inventor
Benedikt Bentele
Siegfried Schönwald
Norbert Schmid
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
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT82102023T priority Critical patent/ATE13934T1/en
Publication of EP0061626A1 publication Critical patent/EP0061626A1/en
Application granted granted Critical
Publication of EP0061626B1 publication Critical patent/EP0061626B1/en
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
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
    • F04C29/128—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type of the elastic type, e.g. reed valves
    • 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
    • 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
    • F04C27/005—Axial sealings for working fluid

Definitions

  • the invention relates to a liquid ring pump with a control disc arranged between an impeller housing and a cover provided with connecting piece, a seal being inserted between the cover and the control disc, which is pressed against the control disc by a bearing edge of the cover and also a pressure formed in the cover. and suction chamber separating central web, and which pump is further sealed to the outside of the impeller housing on the front edge abutting the control disk.
  • Such a liquid ring pump is known from prior public use (Siemens vacuum pump type 2BV1).
  • a disc-shaped seal is inserted between the cover and the control disc.
  • the impeller housing is sealed off from the outside by inserting a sealing compound between the control disk and the front edge of the impeller housing.
  • the invention has for its object to design the design of the pump and seal so that the seal between the cover and control disk and between the impeller housing and the outside can be done by a one-piece seal.
  • the seal is pot-shaped and has a radially outwardly projecting bead at the free end of its peripheral wall, which for sealing the spur gear by an axially overlapping the peripheral wall of the edge of the cover against the front edge of the Impeller housing is pressed.
  • the sealing of the two spatially separated points can thus be accomplished in one operation.
  • the control disk and the seal can be brought into the correct position with respect to one another in a simple manner.
  • the two parts are kept in the correct position relative to each other during further assembly.
  • the correct installation position relative to the cover is ensured by the fact that interlocking elevations and depressions are provided on mutually facing sides of the sealing base and the cover.
  • valve tongues are formed in the bottom of the cup-shaped seal and on the cover the valve tongues ge opposite a stop member is formed.
  • Fig. 1 is an impeller housing, in which an arranged on a drive shaft 2 impeller 3 is rotatably arranged.
  • the drive shaft 2 is net eccentrically with respect to the central axis of the impeller housing 1.
  • On the impeller housing 1 is provided with a connection piece 4 to cover 5 and connected by screws 6 to the impeller housing 1.
  • a control disk 7 is added.
  • the control disk 7 is in turn inserted into a cup-shaped seal 8.
  • a radially outwardly projecting bead 10 is formed at the free end of the peripheral wall 9 of the cup-shaped seal 8, a radially outwardly projecting bead 10 is formed. This bead 10 is pressed against the end edge 12 of the impeller housing by an edge 11 of the cover 5 which extends axially over the peripheral wall 9.
  • knob-shaped elevations 14 are provided which engage in corresponding recesses 15 of the control disc 7.
  • the pot-shaped seal 8 and the control disk 7 are positio ned to each other in their mutual position.
  • the cup-shaped seal 8 has a first recess 16 and a second recess 17 in its bottom.
  • the first recess 16 is located in the area of the intake manifold and the suction slot and releases access to the medium to be sealed. From the second saving 17, the compressed medium from the pressure slot of the control disk in the letting nozzle can enter.
  • a central web 18 located between the two recesses serves to separate the suction formed in the cover and pressure room.
  • the knob-shaped elevations 14 are formed on the central web 18. In the central web 18 there are also openings 19 which serve to supply and discharge the operating fluid. These openings 19 coincide with corresponding openings in the control disc 7 and in the cover 5.
  • a pin 20 is also formed, which engages in a corresponding opening of a valve plate 21 and a catch plate 22, such as 4 can be seen.
  • the valve plate 21 has valve tongues 23 which cover passages 24 provided in the control disk 7.
  • the catch plate 22 serves to limit the lifting movement of the valve tongues 23.
  • the valve plate 21 becomes through the pin 20, which engages in a corresponding bore 25 in the control disk 7, and through lugs on the catch plate, which engage in recesses in the valve plate and the control disk and the catch plate 22 secured in position.
  • the seal is pressed against the catch plate 22 and the valve plate 21 by a rib 26 formed on the cover 5. As a result, these plates are held in their installed position without additional fastening parts being required.
  • the cup-shaped seal 8 has on its bottom side facing the cover a support rib 27 which rests against a correspondingly shaped separating rib of the cover 5 lying between the pressure and suction space and thus pushes it away of the central web 18 to the suction side prevented.
  • the wall thickness is made weaker on the peripheral wall 9.
  • the peripheral wall 9 can be stretched more easily in the axial direction, which is necessary to compensate for length tolerances when installing the pump.
  • the thickness of the bottom of the cup-shaped seal 8 can be selected in accordance with the elasticity of the material of the seal so that manufacturing tolerances of the individual parts to be assembled can be compensated for. Since the control disk 7 is largely enclosed by the cup-shaped seal 8, there is also protection against mechanical damage during assembly and disassembly of the control disk.

Abstract

A liquid ring pump having a control disk interposed between the impeller housing and a cover provided with connecting stubs is disclosed. A seal is interposed between the cover and the control disk and pressed against the control disk by a supporting edge of the cover. The seal further has a central web separating the pressure and the suction spaces formed in the cover. The interior of the impeller housing is sealed from the exterior thereof at the edge resting against the control disk. Sealing at two spaced locations, i.e. at the edge of the housing and between the cover and the control disk, is accomplished with a one-piece seal in accordance with the invention by providing a cup-shaped seal which has at the free end of its circumferential wall a radially outward-extending bead which is pressed against the rim of the impeller housing by an edge of the cover which axially extends beyond the circumferential wall.

Description

Die Erfindung betrifft eine Flüssigkeitsringpumpe mit einer zwischen einem Laufradgehäuse und einem mit Anschlußstutzen versehenen Deckel angeordneten Steuerscheibe, wobei zwischen dem Deckel und der Steuerscheibe eine Dichtung eingefügt ist, die durch einen Auflagerand des Deckels gegen die Steuerscheibe gepreßt ist und außerdem einen im Deckel ausgebildeten Druck- und Saugraum trennenden Mittelsteg aufweist, und wobei welcher Pumpe ferner das Laufradgehäuse an dem an der Steuerscheibe anliegenden Stirnrand nach außen abgedichtet ist.The invention relates to a liquid ring pump with a control disc arranged between an impeller housing and a cover provided with connecting piece, a seal being inserted between the cover and the control disc, which is pressed against the control disc by a bearing edge of the cover and also a pressure formed in the cover. and suction chamber separating central web, and which pump is further sealed to the outside of the impeller housing on the front edge abutting the control disk.

Eine solche Flüssigkeitsringpumpe ist durch offenkundige Vorbenutzung bekannt (Siemens-Vakuumpumpe Typ 2BV1). Bei dieser Pumpe ist zwischen dem Deckel und der Steuerscheibe eine scheibenförmige Dichtung eingefügt. Die Abdichtung des Laufradgehäuses gegenüber dem Außenraum erfolgt durch Einfügen einer Abdichtmasse zwischen der Steuerscheibe und dem Stirnrand des Laufradgehäuses.Such a liquid ring pump is known from prior public use (Siemens vacuum pump type 2BV1). In this pump, a disc-shaped seal is inserted between the cover and the control disc. The impeller housing is sealed off from the outside by inserting a sealing compound between the control disk and the front edge of the impeller housing.

Der Erfindung liegt die Aufgabe zugrunde, die Ausführung der Pumpe und Dichtung so zu gestalten, daß die Abdichtung zwischen Deckel und Steuerscheibe sowie zwischen dem Laufradgehäuse und dem Außenraum durch eine einteilige Dichtung erfolgen kann.The invention has for its object to design the design of the pump and seal so that the seal between the cover and control disk and between the impeller housing and the outside can be done by a one-piece seal.

Die Lösung der gestellten Aufgabe gelingt nach der Erfindung dadurch, daß die Dichtung topfförmig ausgebildet ist und an dem freien Ende ihrer Umfangswand einen radial nach außen ragenden Wulst aufweist, der zur Abdichtung des Stirnrades durch einen die Umfangswand axial übergreifenden Rand des Deckels gegen den Stirnrand des Laufradgehäuses gepreßt ist. Die Abdichtung von den beiden räumlich getrennten Stellen kann somit in einem Arbeitsgang bewerkstelligt werden.The object is achieved according to the invention in that the seal is pot-shaped and has a radially outwardly projecting bead at the free end of its peripheral wall, which for sealing the spur gear by an axially overlapping the peripheral wall of the edge of the cover against the front edge of the Impeller housing is pressed. The sealing of the two spatially separated points can thus be accomplished in one operation.

Dadurch, daß auf einander zugekehrten Seiten des Dichtungsbodens und der Steuerscheibe ineinandergreifende Erhebungen und Vertiefungen vorgesehen sind, lassen sich die Steuerscheibe und die Dichtung auf einfache Weise in die richtige Lage zueinander bringen. Außerdem werden die beiden Teile dadurch während der weiteren Montage in der richtigen Lage zueinander gehalten. Die richtige Einbaulage gegenüber dem Deckel wird dadurch sichergestellt, daß auf einander zugekehrten Seiten des Dichtungsbodens und des Deckels ineinandergreifende Erhebungen und Vertiefungen vorgesehen sind.Because intermeshing elevations and depressions are provided on mutually facing sides of the sealing base and the control disk, the control disk and the seal can be brought into the correct position with respect to one another in a simple manner. In addition, the two parts are kept in the correct position relative to each other during further assembly. The correct installation position relative to the cover is ensured by the fact that interlocking elevations and depressions are provided on mutually facing sides of the sealing base and the cover.

Bei Flüssigkeitsringpumpen mit durch Ventilzungen einer Ventilplatte druckabhängig steuerbaren Durchlaßöffnungen läßt sich eine einfache Montage der Ventilplatte und der ihr zugeordneten Fangplatte dadurch erreichen, daß auf der der Steuerscheibe zugekehrten Seite des Dichtungsbodens eine die Fangplatte und die Ventilplatte in ihrer Lage sichernde Positioniervorrichtung ausgebildet ist und der Deckel eine die Fang- und Ventilplatte gegen die Steuerscheibe pressende Rippe aufweist.In the case of liquid ring pumps with passage openings which can be controlled in a pressure-dependent manner by valve tongues of a valve plate, simple mounting of the valve plate and the catch plate assigned to it can be achieved in that a positioning device securing the catch plate and the valve plate in its position is formed on the side of the sealing base facing the control disk, and the cover has a rib pressing the catch and valve plate against the control disk.

Eine gesonderte Herstellung und Montage der Ventil- und Fangplatte wird nach einer weiteren Ausgestaltung dadurch erübrigt, daß die Ventil zungen im Boden der topfförmigen Dichtung ausgeformt und am Deckel den Ventilzungen ge genüberliegend ein Anschlagglied ausgebildet ist.A separate manufacture and assembly of the valve and catch plate is unnecessary in a further embodiment in that the valve tongues are formed in the bottom of the cup-shaped seal and on the cover the valve tongues ge opposite a stop member is formed.

Anhand eines in der Zeichnung dargestellen Ausführungsbeispiels wird der Anmeldungsge genstand nachfolgend näher beschrieben. Es zeigt

  • Fig. 1 eine Flüssigkeitsringpumpe im Schnitt,
  • Fig. 2 eine topfförmige Dichtung in Draufsicht,
  • Fig.3 eine topfförmige Dichtung im Schnitt und
  • Fig.4 eine Anordnung der Ventil- und Fang platte im Detailschnitt.
Based on an embodiment shown in the drawing, the subject of registration is described in more detail below. It shows
  • 1 is a liquid ring pump in section,
  • 2 is a cup-shaped seal in plan view,
  • 3 shows a cup-shaped seal in section and
  • 4 shows an arrangement of the valve and catch plate in a detailed section.

Mit 1 ist in Fig. 1 ein Laufradgehäuse bezeichnet, in dem ein auf einer Antriebswelle 2 angeordnetes Laufrad 3 drehbar angeordnet ist Die Antriebswelle 2 ist gegenüber der Mittelachse des Laufradgehäuses 1 exzentrisch angeord net. Auf das Laufradgehäuse 1 ist ein mit An schlußstutzen 4 versehener Deckel 5 aufgesetzt und durch Schrauben 6 mit dem Laufradgehäuse 1 verbunden. Zwischen dem Deckel 5 und dem Laufradgehäuse 1 ist eine Steuerscheibe 7 ein gefügt. Die Steuerscheibe 7 ist wiederum in eine topfförmige Dichtung 8 eingesetzt. An dem frei en Ende der Umfangswand 9 der topfförmigen Dichtung 8 ist ein radial nach außen ragender Wulst 10 ausgebildet. Dieser Wulst 10 wird durch einen die Umfangswand 9 axial übergreifenden Rand 11 des Deckels 5 gegen den Stirnrand 12 des Laufradgehäuses gepreßt. Hierdurch wird das Laufradgehäuse gegenüber dem Außenraum abgedichtet. Mit ihrem Boden liegt die topfförmige Dichtung 8 auf einem Auflagerand 13 des Deckels 5 auf. Durch diesen Auflagerand 13 wird die topfförmige Dichtung 8 an ihrem Bo den gegen die Steuerscheibe 7 gedrückt und so mit eine Dichtung zwischen dem Deckel und der Steuerscheibe bewirkt.1 in Fig. 1 is an impeller housing, in which an arranged on a drive shaft 2 impeller 3 is rotatably arranged. The drive shaft 2 is net eccentrically with respect to the central axis of the impeller housing 1. On the impeller housing 1 is provided with a connection piece 4 to cover 5 and connected by screws 6 to the impeller housing 1. Between the cover 5 and the impeller housing 1, a control disk 7 is added. The control disk 7 is in turn inserted into a cup-shaped seal 8. At the free end of the peripheral wall 9 of the cup-shaped seal 8, a radially outwardly projecting bead 10 is formed. This bead 10 is pressed against the end edge 12 of the impeller housing by an edge 11 of the cover 5 which extends axially over the peripheral wall 9. This seals the impeller housing from the outside. The bottom of the cup-shaped seal 8 rests on a support edge 13 of the cover 5. Through this support edge 13, the cup-shaped seal 8 is pressed against the control disk 7 at its bo and thus causes a seal between the cover and the control disk.

Auf der der Steuerscheibe zugekehrten Seite des Bodens der topfförmigen Dichtung 8 sind noppenförmige Erhebungen 14 vorgesehen, die in entsprechende Vertiefungen 15 der Steuer scheibe 7 eingreifen. Dadurch werden die topf förmige Dichtung 8 und die Steuerscheibe 7 in ihrer gegenseitigen Lage zueinander positio niert.On the side facing the control disc of the bottom of the cup-shaped seal 8, knob-shaped elevations 14 are provided which engage in corresponding recesses 15 of the control disc 7. As a result, the pot-shaped seal 8 and the control disk 7 are positio ned to each other in their mutual position.

Aus der Darstellung nach Fig. 2 ist zu erken nen, daß die topfförmige Dichtung 8 in ihrem Boden eine erste Aussparung 16 und eine zweite Aussparung 17 aufweist. Die erste Aussparung 16 liegt im Bereich des Ansaugstutzens und des Saugschlitzes und gibt den Zutritt des zu ver dichtenden Mediums frei. Durch die zweite Aus sparung 17 kann das verdichtete Medium aus dem Druckschlitz der Steuerscheibe in den Aus laßstutzen eintreten. Ein zwischen den beiden Aussparungen liegender Mittelsteg 18 dient zur Trennung des im Deckel ausgebildeten Saug und Druckraumes. An dem Mittelsteg 18 sind die noppenförmigen Erhebungen 14 angeformt. Im Mittelsteg 18 befinden sich außerdem noch Öffnungen 19, die zum Zu- und Abführen der Betriebsflüssigkeit dienen. Diese Öffnungen 19 decken sich mit entsprechenden Öffnungen in der Steuerscheibe 7 und im Deckel 5. Auf der der Steuerscheibe 7 zugekehrten Bodenseite der topfförmigen Dichtung 8 ist ferner ein Zapfen 20 ausgebildet, der in eine entsprechende Öffnung einer Ventilplatte 21 und einer Fangplatte 22 eingreift, wie aus Fig. 4 zu ersehen ist. Die Ventilplatte 21 weist bekannterweise Ventilzungen 23 auf, die in der Steuerscheibe 7 vorgesehene Durchlässe 24 abdecken. Zur Begrenzung der Abhebbewegung der Ventilzungen 23 dient die Fangplatte 22. Durch den Zapfen 20, der in eine entsprechende Bohrung 25 in der Steuerscheibe 7 eingreift, sowie durch Nasen an der Fangplatte, die in Aussparungen der Ventilplatte und der Steuerscheibe eingreifen, werden die Ventilplatte 21 und die Fangplatte 22 in ihrer Lage gesichert. Durch eine an dem Deckel 5 ausgebildete Rippe 26 wird die Dichtung gegen die Fangplatte 22 und die Ventilplatte 21 gedrückt. Diese Platten werden dadurch in ihrer Einbaulage gehalten, ohne daß zusätzliche Befestigungsteile erforderlich sind.2 it can be seen that the cup-shaped seal 8 has a first recess 16 and a second recess 17 in its bottom. The first recess 16 is located in the area of the intake manifold and the suction slot and releases access to the medium to be sealed. From the second saving 17, the compressed medium from the pressure slot of the control disk in the letting nozzle can enter. A central web 18 located between the two recesses serves to separate the suction formed in the cover and pressure room. The knob-shaped elevations 14 are formed on the central web 18. In the central web 18 there are also openings 19 which serve to supply and discharge the operating fluid. These openings 19 coincide with corresponding openings in the control disc 7 and in the cover 5. On the bottom of the cup-shaped seal 8 facing the control disc 7, a pin 20 is also formed, which engages in a corresponding opening of a valve plate 21 and a catch plate 22, such as 4 can be seen. As is known, the valve plate 21 has valve tongues 23 which cover passages 24 provided in the control disk 7. The catch plate 22 serves to limit the lifting movement of the valve tongues 23. The valve plate 21 becomes through the pin 20, which engages in a corresponding bore 25 in the control disk 7, and through lugs on the catch plate, which engage in recesses in the valve plate and the control disk and the catch plate 22 secured in position. The seal is pressed against the catch plate 22 and the valve plate 21 by a rib 26 formed on the cover 5. As a result, these plates are held in their installed position without additional fastening parts being required.

Aus der Schnittdarstellung der Fig. 3 ist zu erkennen, daß die topfförmige Dichtung 8 an ihrer dem Deckel zugekehrten Bodenseite eine Abstützrippe 27 aufweist, die sich an eine entsprechend geformte, zwischen dem Druck- und Saugraum liegende Trennrippe des Deckels 5 anlegt und so ein Wegschieben des Mittelsteges 18 zur Saugseite hin verhindert. An der Umfangswand 9 ist in einem Bereich 28 die Wandstärke schwächer ausgebildet. Infolge dieser geringeren Wandstärke kann die Umfangswand 9 leichter in axialer Richtung gedehnt werden, was zum Ausgleich von Längentoleranzen bei der Montage der Pumpe notwendig ist. Außerdem kann die Stärke des Bodens der topfförmigen Dichtung 8 entsprechend der Elastizität des Materials der Dichtung so gewählt werden, daß Fertigungstoleranzen der einzelnen zu montierenden Teile ausgeglichen werden können. Da die Steuerscheibe 7 durch die topfförmige Dichtung 8 weitgehend umschlossen ist, besteht außerdem ein Schutz gegen mechanische Beschädigung bei Montage und Demontage der Steuerscheibe.From the sectional view of FIG. 3 it can be seen that the cup-shaped seal 8 has on its bottom side facing the cover a support rib 27 which rests against a correspondingly shaped separating rib of the cover 5 lying between the pressure and suction space and thus pushes it away of the central web 18 to the suction side prevented. In a region 28, the wall thickness is made weaker on the peripheral wall 9. As a result of this smaller wall thickness, the peripheral wall 9 can be stretched more easily in the axial direction, which is necessary to compensate for length tolerances when installing the pump. In addition, the thickness of the bottom of the cup-shaped seal 8 can be selected in accordance with the elasticity of the material of the seal so that manufacturing tolerances of the individual parts to be assembled can be compensated for. Since the control disk 7 is largely enclosed by the cup-shaped seal 8, there is also protection against mechanical damage during assembly and disassembly of the control disk.

Claims (5)

1. A liquid-ring pump having a control disk (7) disposed between an impeller casing (1) and a cover (5) provided with connection fittings (4) and wherein a gasket (8) is inserted between the cover (5) and the control disk (7) and is pressed against the control disk (7) by a bearing edge (13) on the cover (5) and also has a central bridge portion (18) dividing the pressure and suction chambers formed in the cover (5), and wherein, moreover, the impeller casing (1) is sealed to the outside at the front edge (12) resting against the control disk (7), characterised in that the gasket (8) is cup-shaped and at the free end of its peripheral wall (9) has a bead (10) which projects radially outwards and is pressed against the front edge (12) of the impeller casing (1) by an edge (11) on the cover (5) engaging axially over the peripheral wall (9) so as to seal the front edge (12).
2. A liquid-ring pump as claimed in Claim 1, characterised in that projections (14) and recesses (15) which engage with one another are provided on the sides of the base of the gasket and the control disk (7) which face one another.
3. A liquid-ring pump as claimed in Claim 1 or Claim 2, characterised in that projections and recesses which engage with one another are provided on the sides of the base of the gasket and the cover (5) which face one another.
4. A liquid-ring pump as claimed in Claim 1, 2 or 3, in which, in addition to a pressure slot, the control disk (7) also has passages (24) which can be opened in dependence on pressure by means of the valve tongues (23) of a valve plate (21), the lifting movement of which is limited by a stop plate (22), and wherein the valve and stop plates (21 and 22) are held in position relative to one another by elements engaging wiht one another in a form-locking manner, characterised in that a positioning device holding the stop plate (22) and the valve plate (21) in their positions is formed on the side of the base of the gasket facing the control disk (7); and that the cover (5) has a rib (26) which presses the stop and valve plates (22 and 21) against the control disk (7).
5. A liquid-ring pump as claimed in Claim 1, 2 or 3, in which, in addition to a pressure slot, the control disk (7) also has passages (24) which can be opened in dependence on pressure by means of the valve tongues (23) of a valve plate (21) the lifting movement of which is limited by a stop, characterised in that the valve tongues (23) are formed in the base of the cupshaped gasket (8); and that a stop element is formed on the cover (5) opposite the valve tongues (23).
EP82102023A 1981-03-24 1982-03-12 Liquid-ring pump with a control disc mounted between an impeller casing and a cover comprising the fluid connexions Expired EP0061626B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82102023T ATE13934T1 (en) 1981-03-24 1982-03-12 LIQUID RING PUMP WITH A CONTROL DISC BETWEEN AN IMPELLER HOUSING AND A PORTED COVER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3111538 1981-03-24
DE19813111538 DE3111538A1 (en) 1981-03-24 1981-03-24 LIQUID RING PUMP WITH A CONTROL DISC ARRANGED BETWEEN THE IMPELL WHEEL HOUSING AND THE LID PROVIDED WITH CONNECTORS

Publications (2)

Publication Number Publication Date
EP0061626A1 EP0061626A1 (en) 1982-10-06
EP0061626B1 true EP0061626B1 (en) 1985-06-19

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Application Number Title Priority Date Filing Date
EP82102023A Expired EP0061626B1 (en) 1981-03-24 1982-03-12 Liquid-ring pump with a control disc mounted between an impeller casing and a cover comprising the fluid connexions

Country Status (5)

Country Link
US (1) US4443158A (en)
EP (1) EP0061626B1 (en)
JP (1) JPS57168083A (en)
AT (1) ATE13934T1 (en)
DE (2) DE3111538A1 (en)

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DE19727719C1 (en) * 1997-06-30 1998-06-25 Siemens Ag Rotary fluid pump for miniature vacuum pump
US6315524B1 (en) 1999-03-22 2001-11-13 David Muhs Pump system with vacuum source
US6692234B2 (en) * 1999-03-22 2004-02-17 Water Management Systems Pump system with vacuum source
US6405748B1 (en) * 1999-03-22 2002-06-18 David Muhs Trailer and fuel tank assembly
US6390768B1 (en) 1999-03-22 2002-05-21 David Muhs Pump impeller and related components
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US8998586B2 (en) * 2009-08-24 2015-04-07 David Muhs Self priming pump assembly with a direct drive vacuum pump
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Also Published As

Publication number Publication date
DE3264204D1 (en) 1985-07-25
US4443158A (en) 1984-04-17
DE3111538A1 (en) 1982-10-21
EP0061626A1 (en) 1982-10-06
JPS57168083A (en) 1982-10-16
ATE13934T1 (en) 1985-07-15

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