EP0662197B1 - Bearing arrangement - Google Patents

Bearing arrangement Download PDF

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Publication number
EP0662197B1
EP0662197B1 EP93919317A EP93919317A EP0662197B1 EP 0662197 B1 EP0662197 B1 EP 0662197B1 EP 93919317 A EP93919317 A EP 93919317A EP 93919317 A EP93919317 A EP 93919317A EP 0662197 B1 EP0662197 B1 EP 0662197B1
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EP
European Patent Office
Prior art keywords
bearing
bearing shell
holding element
housing
pump
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
EP93919317A
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German (de)
French (fr)
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EP0662197A1 (en
Inventor
Jörg Urban
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KSB AG
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KSB AG
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Publication date
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Publication of EP0662197B1 publication Critical patent/EP0662197B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/047—Bearings hydrostatic; hydrodynamic

Definitions

  • the invention relates to a bearing for centrifugal pumps, consisting of a bearing shell arranged in the pump housing and a centrifugal pump impeller mounted within the bearing shell with the suction opening.
  • a generic construction is known from GB-PS 805 825.
  • a bearing shell of a hydrostatic bearing is pressed into the pump housing, into which an impeller with an extended suction mouth is immersed.
  • This type of construction is very complex, since very precise machining of the inside of the housing is necessary to prevent misalignment during later assembly.
  • the construction of DE-OS 30 11 380 shows something similar, in which a double-flow impeller with its two inlet openings is mounted directly in corresponding bearing shells.
  • suction opening of an impeller can also be designed as a rotor of an electric motor is known from the construction according to GB-PS 909 550.
  • FR-A 752 783 shows a mounting of a bearing shell corresponding to GB-PS 805 825.
  • DE-A-34 19 038 shows a grease-lubricated shaft bearing of a screw pump, with which tilting of a bearing is to be achieved.
  • US-A 3 659 910 shows the arrangement of a tilting receptacle for a shaft bearing.
  • the invention is based on the problem of easy-to-assemble and checkable with very little effort for centrifugal pumps of the generic type develop.
  • the solution to this problem is given in the characterizing part of the main claim. This makes it possible to have the machining of the receiving surfaces for the bearing shell and the mounting of the bearing shell itself carried out from the outside of the pump housing. In addition to the better accessibility, this means a considerable reduction in the processing effort. Furthermore, by simply removing it a connected pipeline, e.g. the suction line, the condition of the bearing can be checked. The dismantling of the pumps that was previously necessary for this is completely eliminated.
  • the holding element can be sealed off from the flange and the housing by means of proven sealing elements, such as O-rings, flat seals or the like.
  • the sealing elements are selected in accordance with the operating conditions of the pump.
  • Anti-rotation elements prevent any rotation of the bearing shell.
  • the bearing shell is arranged so that it can be tilted. This can e.g. by means of an outwardly facing narrow edge or collar with which the bearing shell is guided centrally in the housing.
  • Two projections can be attached to the bearing shell or the collar, which ensure tiltable support of the bearing shell on the holding element. This configuration is useful for pumps with high internal pressures. This is because these can assume orders of magnitude which would overwhelm an elastic element which ensures tilting mobility.
  • This design of the bearing allows easy replacement if the bearing shell wears out.
  • the shortest overall length of a pump is obtained when the flange of a pipeline to be connected to the pump acts directly on a holding element.
  • the flange screws thus fix the pump bearing within the housing in the simplest manner with the interposition of the holding element.
  • This solution can be used for both single-stage and multi-stage centrifugal pumps.
  • the overall length of the pump can be reduced and the rigidity of the rotating part can be significantly improved.
  • FIG. 1 shows an impeller 1 of a single-stage or the first impeller of a multi-stage centrifugal pump, which is fastened to a shaft 3 with a screw 2.
  • a bearing shell 5 is inserted into the housing 4 from the outside, which is supported with a narrow collar 15 so that it can tilt with the interposition of elastic sealing rings 6.
  • the holding element 7 is sealed by a sealing ring 8 with respect to the housing 4 and by a sealing ring 9 with respect to a flange 10 of a line leading the pumping medium to the pump.
  • the flange 10 is pulled against the housing 4 by conventional fastening means, here screws 11, and thereby presses the holding element 7 and the bearing shell 5 lying against it into the housing 4.
  • An anti-rotation device 12 prevents rotation of the bearing shell 5.
  • the impeller is on the suction mouth 13 equipped with a race 14 which is slidably mounted within the bearing shell 5.
  • FIG. 3 is an enlarged illustration from the circle of FIG. 2.
  • the collar 16 is provided with two projections 16 at two points located in a horizontal plane and opposite one another with respect to the diameter. These rest directly on the holding element 7 and transmit those axial pressure forces which act on the end face of the bearing shell 5 located therein due to the pressure in the suction-side wheel side space.
  • the contact surface of the projections 16 is dimensioned and designed such that the permissible surface pressure is not exceeded and, on the other hand, the tilting movement around the two projections 16 is ensured.
  • FIG. 4 shows an enlarged side view of a projection 16 on the collar 15 and
  • FIG. 5 shows an end view of a bearing shell 5 with molded projections 16.
  • These projections can, for example, be molded on, pressed on, cast on and by means of other known ones mechanical processing methods are created.
  • This type of impeller or shaft bearing allows access to the bearing for inspection or control purposes in the simplest way.
  • the pipeline which is designed here as a suction line
  • the bearing can be inspected immediately and replaced in the shortest possible time in the event of a possible damage.
  • the complete disassembly of the pump that has been usual up to now is no longer necessary.
  • An operator of a centrifugal pump designed according to the invention can thus carry out an inspection or repair without any problems and has the additional advantage of an extremely low loss of production.
  • the overall length of the pump can be considerably shortened by this design. This is because the frequently used shaft bearing in a bearing star arranged within the inlet cross section can have a very disadvantageous influence on the vibration behavior and the overall length.

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

Abstract

The invention relates to a bearing arrangement at the intake aperture of a centrifugal pump impeller in which a bearing shell (5) arranged in the housing (4) can be fitted from outside the pump. The bearing shell (5) is positioned by a retainer (7) and the flange (10) of a pipe to be connected thereto.

Description

Die Erfindung betrifft eine Lagerung für Kreiselpumpen, bestehend aus einer im Pumpengehäuse angeordneten Lagerschale und einem innerhalb der Lagerschale mit der Saugöffnung gelagerten Kreiselpumpenlaufrad.The invention relates to a bearing for centrifugal pumps, consisting of a bearing shell arranged in the pump housing and a centrifugal pump impeller mounted within the bearing shell with the suction opening.

Eine gattungsgemäße Konstruktion ist aus der GB-PS 805 825 bekannt. In das Pumpengehäuse ist eine Lagerschale eines hydrostatischen Lagers eingepreßt, in die ein Laufrad mit einem verlängerten Saugmund lagernd eintaucht. Diese Bauart ist sehr aufwendig, da hier eine sehr genaue Bearbeitung des Gehäuseinnern notwendig ist, um Fluchtungsfehler bei der späteren Montage zu verhindern. Etwas ähnliches zeigt die Konstruktion der DE-OS 30 11 380, bei der ein doppelflutiges Laufrad mit seinen beiden Eintrittsöffnungen in entsprechenden Lagerschalen direkt gelagert ist.A generic construction is known from GB-PS 805 825. A bearing shell of a hydrostatic bearing is pressed into the pump housing, into which an impeller with an extended suction mouth is immersed. This type of construction is very complex, since very precise machining of the inside of the housing is necessary to prevent misalignment during later assembly. The construction of DE-OS 30 11 380 shows something similar, in which a double-flow impeller with its two inlet openings is mounted directly in corresponding bearing shells.

Daß die Saugöffnung eines Laufrades gleichzeitig auch als Rotor eines Elektromotors ausgebildet sein kann, ist durch die Konstruktion gemäß der GB-PS 909 550 bekannt.That the suction opening of an impeller can also be designed as a rotor of an electric motor is known from the construction according to GB-PS 909 550.

Die FR-A 752 783 zeigt eine der GB-PS 805 825 entsprechende Befestigung einer Lagerschale. In der DE-A- 34 19 038 ist ein fettgeschmiertes Wellenlager einer Schraubenpumpe gezeigt, mit dem eine Kippbeweglichkeit einer Lagerung erreicht werden soll. Und die US-A 3 659 910 zeigt die Anordnung einer kippbeweglichen Aufnahme für eine Wellenlagerung.FR-A 752 783 shows a mounting of a bearing shell corresponding to GB-PS 805 825. DE-A-34 19 038 shows a grease-lubricated shaft bearing of a screw pump, with which tilting of a bearing is to be achieved. And US-A 3 659 910 shows the arrangement of a tilting receptacle for a shaft bearing.

Der Erfindung liegt das Problem zugrunde, für gattungsgemäß ausgerüstete Kreiselpumpen eine einfach zu montierende und mit sehr geringem Aufwand zu kontrollierende Lagerung zu entwickeln. Die Lösung dieses Problems ist im kennzeichnenden Teil des Hauptanspruches wiedergegeben. Damit ist es möglich, die Bearbeitung der Aufnahmeflächen für die Lagerschale sowie die Montage der Lagerschale selbst von der Außenseite des Pumpengehäuses vornehmen zu lassen. Dies bedeutet neben der besseren Zugänglichkeit eine erhebliche Verminderung im Bearbeitungsaufwand. Des weiteren kann durch bloßes Entfernen einer angeschlossenen Rohrleitung, z.B. der Saugleitung, das Lager auf seinen Zustand überprüft werden. Die bisher dazu notwendige Demontage der Pumpen entfällt damit völlig.The invention is based on the problem of easy-to-assemble and checkable with very little effort for centrifugal pumps of the generic type develop. The solution to this problem is given in the characterizing part of the main claim. This makes it possible to have the machining of the receiving surfaces for the bearing shell and the mounting of the bearing shell itself carried out from the outside of the pump housing. In addition to the better accessibility, this means a considerable reduction in the processing effort. Furthermore, by simply removing it a connected pipeline, e.g. the suction line, the condition of the bearing can be checked. The dismantling of the pumps that was previously necessary for this is completely eliminated.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen beschrieben. So kann die Abdichtung des Halteelementes gegenüber dem Flansch und dem Gehäuse mittels bewährter Dichtelemente, wie O-Rinqen, Flachdichtungen oder dgl. erfolgen. Die Dichtelemente sind entsprechend den Einsatzbedingungen der Pumpe ausgewählt. Verdrehsicherungselemente unterbinden eine eventuelle Rotation der Lagerschale. Zum Ausgleich von Fertigungstoleranzen, Wellendurchbiegung oder zur Schwingungsdämpfung des rotierenden Teiles ist die Lagerschale kippbeweglich angeordnet. Dies kann z.B. mittels eines nach außen weisenden schmalen Randes oder Bundes erfolgen, mit dem die Lagerschale im Gehäuse zentrisch geführt ist. An der Lagerschale oder dem Bund sind zwei Vorsprünge anbringbar, die eine kippbewegliche Abstützung der Lagerschale am Halteelement gewährleisten. Diese Ausgestaltung ist sinnvoll bei Pumpen mit hohen Innendrücken. Denn diese können Größenordnungen annehmen, die ein die Kippbeweglichkeit gewährleistendes elastisches Element überfordern würden.Further advantageous embodiments of the invention are described in the subclaims. For example, the holding element can be sealed off from the flange and the housing by means of proven sealing elements, such as O-rings, flat seals or the like. The sealing elements are selected in accordance with the operating conditions of the pump. Anti-rotation elements prevent any rotation of the bearing shell. In order to compensate for manufacturing tolerances, shaft deflection or to dampen the vibration of the rotating part, the bearing shell is arranged so that it can be tilted. This can e.g. by means of an outwardly facing narrow edge or collar with which the bearing shell is guided centrally in the housing. Two projections can be attached to the bearing shell or the collar, which ensure tiltable support of the bearing shell on the holding element. This configuration is useful for pumps with high internal pressures. This is because these can assume orders of magnitude which would overwhelm an elastic element which ensures tilting mobility.

Diese Gestaltung der Lagerung erlaubt bei einem eventuellen Verschleiß der Lagerschale einen bequemen Austausch. Die kürzeste Baulänge einer Pumpe ergibt sich, wenn der Flansch einer an die Pumpe anzuschließenden Rohrleitung direkt auf ein Halteelement einwirkt. Somit fixieren die Flanschschrauben unter Zwischenschaltung des Halteelementes in einfachster Weise das Pumpenlager innerhalb des Gehäuses. Diese Lösung ist sowohl für einstufige als auch für mehrstufige Kreiselpumpen verwendbar. Bei Verwendung dieser Lagerbauart läßt sich die gesamte Pumpenbaulänge reduzieren und die Steifigkeit des rotierenden Teiles erheblich verbessern.This design of the bearing allows easy replacement if the bearing shell wears out. The shortest overall length of a pump is obtained when the flange of a pipeline to be connected to the pump acts directly on a holding element. The flange screws thus fix the pump bearing within the housing in the simplest manner with the interposition of the holding element. This solution can be used for both single-stage and multi-stage centrifugal pumps. When using this type of bearing, the overall length of the pump can be reduced and the rigidity of the rotating part can be significantly improved.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher beschrieben. Dabei zeigen die

Fig. 1
einen Schnitt durch das erste Laufrad einer Pumpe, die
Fig. 2
einen Schnitt durch die Horizontalebene einer pumpe mit höherem Druckniveau, die
Fig. 3
eine Vergrößerung einer Einzelheit von Fig. 2 und die
Fig. 4 und 5
in vergrößerter Darstellung eine Seitenansicht und Draufsicht von einem Vorsprung.
An embodiment of the invention is shown in the drawings and will be described in more detail below. The show
Fig. 1
a section through the first impeller of a pump, the
Fig. 2
a section through the horizontal plane of a pump with a higher pressure level, the
Fig. 3
an enlargement of a detail of Fig. 2 and
4 and 5
an enlarged side view and top view of a projection.

In der Fig. 1 ist ein Laufrad 1 einer einstufigen oder das erste Laufrad einer mehrstufigen Kreiselpumpe gezeigt, welches mit einer Schraube 2 an einer Welle 3 befestigt ist. In das Gehäuse 4 ist von der Außenseite her eine Lagerschale 5 eingeschoben, die unter Zwischenschaltung von elastischen Dichtungsringen 6 mit einem schmalen Bund 15 kippbeweglich gelagert ist. Ein ebenfalls von der Außenseite her montierbares Halteelement 7 hält die Lagerschale 5 in ihrer Position. Von der Funktionsweise her, ist hier das Halteelement 7 als Druckring ausgebildet. Das Halteelement 7 ist durch einen Dichtring 8 gegenüber dem Gehäuse 4 und durch einen Dichtring 9 gegenüber einem Flansch 10 einer das Fördermedium an die Pumpe heranführenden Leitung abgedichtet. Der Flansch 10 wird durch übliche Befestigungsmittel, hier Schrauben 11, gegen das Gehäuse 4 gezogen und preßt dabei das Halteelement 7 sowie die daran anliegende Lagerschale 5 in das Gehäuse 4. Eine Verdrehsicherung 12 verhindert eine Rotation der Lagerschale 5. Das Laufrad ist am Saugmund 13 mit einem Laufring 14 ausgestattet, welcher innerhalb der Lagerschale 5 gleitend gelagert ist.1 shows an impeller 1 of a single-stage or the first impeller of a multi-stage centrifugal pump, which is fastened to a shaft 3 with a screw 2. A bearing shell 5 is inserted into the housing 4 from the outside, which is supported with a narrow collar 15 so that it can tilt with the interposition of elastic sealing rings 6. A holding element 7, which can also be mounted from the outside, holds the bearing shell 5 in its position. In terms of the mode of operation, the holding element 7 is designed as a pressure ring. The holding element 7 is sealed by a sealing ring 8 with respect to the housing 4 and by a sealing ring 9 with respect to a flange 10 of a line leading the pumping medium to the pump. The flange 10 is pulled against the housing 4 by conventional fastening means, here screws 11, and thereby presses the holding element 7 and the bearing shell 5 lying against it into the housing 4. An anti-rotation device 12 prevents rotation of the bearing shell 5. The impeller is on the suction mouth 13 equipped with a race 14 which is slidably mounted within the bearing shell 5.

Die Fig. 2 zeigt für diejenigen Anwendungsfälle, bei denen im Radseitenraum des Laufrades 1 ein sehr hoher Druck vorherrscht, eine Lösung, bei der am Bund 15 zwei in axialer Richtung vorstehende, in der horizontalen Ringebene angeordnete Vorsprünge 16 angebracht sind. Der hier gezeigte Schnitt entspricht einem horizontalen Schnitt durch die Saugseite einer Pumpe. Aufgrund der Druckkräfte im saugseitigen Radseitenraum wird die Lagerschale 5 nach vorn, d. h. gegen die Zuströmrichtung gepreßt und stützt sich am Halteelement 7 ab. Infolge der zwei in horizontaler Ebene angebrachten Vorsprüngen 16 ist eine Kippbeweglichkeit bei eventuellen Wellendurchbiegungen gewährleistet. Anstelle der in Fig. 1 gezeigten zwei elastischen Dichtungsrippen 6 findet hier nur noch ein einzelner Dichtungsring 6 Verwendung.2 shows a solution for those applications in which a very high pressure prevails in the wheel side space of the impeller 1, in which two projections 16, which protrude in the axial direction and are arranged in the horizontal ring plane, are attached to the collar 15. The section shown here corresponds to a horizontal section through the suction side of a pump. Due to the pressure forces in the suction side wheel side space, the bearing shell 5 is forward, d. H. pressed against the inflow direction and is supported on the holding element 7. As a result of the two projections 16 mounted in the horizontal plane, a tilting movement is ensured in the event of shaft deflections. Instead of the two elastic sealing ribs 6 shown in FIG. 1, only a single sealing ring 6 is used here.

Die Fig. 3 ist eine vergrößerte Darstellung aus dem Kreis von Fig. 2. Bei dem hier gezeigten Beispiel ist der Bund 16 an zwei in horizontaler Ebene befindlichen, in bezug auf den Durchmesser einander gegenüberliegenden Stellen mit zwei Vorsprüngen 16 versehen. Diese liegen direkt am Halteelement 7 an und übertragen diejenigen axialen Druckkräfte, die aufgrund des Druckes im saugseitigen Radseitenraum auf die darin befindliche Stirnseite der Lagerschale 5 wirken. Die anliegende Fläche der Vorsprünge 16 ist so bemessen und gestaltet, daß die zulässige Flächenpressung nicht überschritten und zum anderen die Kippbeweglichkeit um die beiden Vorsprünge 16 gewährleistet ist.FIG. 3 is an enlarged illustration from the circle of FIG. 2. In the example shown here, the collar 16 is provided with two projections 16 at two points located in a horizontal plane and opposite one another with respect to the diameter. These rest directly on the holding element 7 and transmit those axial pressure forces which act on the end face of the bearing shell 5 located therein due to the pressure in the suction-side wheel side space. The contact surface of the projections 16 is dimensioned and designed such that the permissible surface pressure is not exceeded and, on the other hand, the tilting movement around the two projections 16 is ensured.

In der Fig. 4 ist als Vergrößerung eine seitliche Ansicht auf einen Vorsprung 16 am Bund 15 gezeigt und die Fig. 5 zeigt eine stirnseitige Draufsicht auf eine Lagerschale 5 mit angeformten Vorsprüngen 16. Diese Vorsprünge können beispielsweise angeformt, angepreßt, angegossen und mittels anderer bekannter mechanischer Bearbeitungsmethoden erstellt werden.4 shows an enlarged side view of a projection 16 on the collar 15 and FIG. 5 shows an end view of a bearing shell 5 with molded projections 16. These projections can, for example, be molded on, pressed on, cast on and by means of other known ones mechanical processing methods are created.

Diese Art der Laufrad- bzw. Wellenlagerung ermöglicht den Zugang zum Lager für Revisions- bzw. Kontrollzwecke in einfachster Weise. Durch bloßes Entfernen der hier als Saugleitung ausgebildeten Rohrleitung kann das Lager sofort inspiziert werden und bei einem eventuellen Schadensfall in kürzester Zeit gewechselt werden. Die bisher übliche vollständige Demontage der Pumpe entfällt damit. Ein Betreiber einer erfindungsgemäß gestalteten Kreiselpumpe kann somit problemlos eine Inspektion bzw. Reparatur vornehmen und hat dabei den zusätzlichen Vorteil eines äußerst geringen Produktionsausfalles. Überdies kann durch diese Bauart die Baulänge der Pumpe erheblich verkürzt werden. Denn die häufig benutzte Wellenlagerung in einem innerhalb des Eintrittsquerschnittes angeordneten Lagerstern kann das Schwingungsverhalten und die Baulänge sehr nachteilig beeinflussen.This type of impeller or shaft bearing allows access to the bearing for inspection or control purposes in the simplest way. By simply removing the pipeline, which is designed here as a suction line, the bearing can be inspected immediately and replaced in the shortest possible time in the event of a possible damage. The complete disassembly of the pump that has been usual up to now is no longer necessary. An operator of a centrifugal pump designed according to the invention can thus carry out an inspection or repair without any problems and has the additional advantage of an extremely low loss of production. In addition, the overall length of the pump can be considerably shortened by this design. This is because the frequently used shaft bearing in a bearing star arranged within the inlet cross section can have a very disadvantageous influence on the vibration behavior and the overall length.

Claims (8)

  1. A bearing for centrifugal pumps, comprising a bearing shell (5) arranged in the pump housing and a centrifugal pump impeller (1) rotatably mounted within the bearing shell (5) with the intake opening thereof, characterized in that a holding element (7) able to be operated from the outer side of the centrifugal pump positions the bearing shell (5) within the housing (4).
  2. The bearing as claimed in claim 1, characterized in that the holding element (7) has a seal between it and the housing (4) and a flange (10).
  3. The bearing as claimed in claim 1 or in claim 2, characterized in that on the housing (4) and/or on the holding element (7) one or more elements (12) preventing rotation are arranged for the bearing shell (5).
  4. The bearing as claimed in claim 1, characterized in that the bearing shell (5) is attached in a manner permitting rocking and/or replacement.
  5. The bearing as claimed in claim 4, characterized in that the bearing shell (5) is rotatably mounted to permit a rocking movement using a radially projecting collar (15) between elastic rings (6).
  6. The bearing as claimed in claim 4, characterized in that the bearing shell (5) is mounted to permit a rocking movement using two axially extending projections (16).
  7. The bearing as claimed in claim 6, characterized in that the projections (16) engage the holding element (7).
  8. The bearing as claimed in any one or more of the claims 1 through 7, characterized in that a flange (10) of a supply duct adapted to be connected with the pump thrusts the holding element (7) against the bearing shell (5).
EP93919317A 1992-09-14 1993-09-10 Bearing arrangement Expired - Lifetime EP0662197B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4230714 1992-09-14
DE4230714 1992-09-14
DE4327425A DE4327425A1 (en) 1992-09-14 1993-08-14 storage
DE4327425 1993-08-14
PCT/EP1993/002451 WO1994007034A1 (en) 1992-09-14 1993-09-10 Bearing arrangement

Publications (2)

Publication Number Publication Date
EP0662197A1 EP0662197A1 (en) 1995-07-12
EP0662197B1 true EP0662197B1 (en) 1996-05-01

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Application Number Title Priority Date Filing Date
EP93919317A Expired - Lifetime EP0662197B1 (en) 1992-09-14 1993-09-10 Bearing arrangement

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US (1) US5547289A (en)
EP (1) EP0662197B1 (en)
JP (1) JP2829546B2 (en)
DE (2) DE4327425A1 (en)
WO (1) WO1994007034A1 (en)

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US10240600B2 (en) 2017-04-26 2019-03-26 Wilden Pump And Engineering Llc Magnetically engaged pump

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SU1448113A1 (en) * 1987-03-17 1988-12-30 Всесоюзный научно-исследовательский и конструкторско-технологический институт компрессорного машиностроения Device for unloading rotor from action of axial force
DE3834862A1 (en) * 1988-10-13 1990-04-19 Klein Schanzlin & Becker Ag SHAFT BEARING OF A CANCEL MOTOR PUMP
SU1707262A1 (en) * 1990-02-05 1992-01-23 Уральский филиал Всесоюзного теплотехнического научно-исследовательского института им.Ф.Э.Дзержинского Centrifugal pump
DE4108257C2 (en) * 1990-03-17 1995-01-26 Allweiler Ag Magnetic clutch pump

Also Published As

Publication number Publication date
US5547289A (en) 1996-08-20
DE4327425A1 (en) 1994-03-17
JPH07507123A (en) 1995-08-03
EP0662197A1 (en) 1995-07-12
DE59302466D1 (en) 1996-06-05
JP2829546B2 (en) 1998-11-25
WO1994007034A1 (en) 1994-03-31

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