EP1002959B1 - Centrifugal pump assembly - Google Patents

Centrifugal pump assembly Download PDF

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Publication number
EP1002959B1
EP1002959B1 EP99122438A EP99122438A EP1002959B1 EP 1002959 B1 EP1002959 B1 EP 1002959B1 EP 99122438 A EP99122438 A EP 99122438A EP 99122438 A EP99122438 A EP 99122438A EP 1002959 B1 EP1002959 B1 EP 1002959B1
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EP
European Patent Office
Prior art keywords
wall part
pump housing
peripheral wall
pump
terminal plate
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
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EP99122438A
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German (de)
French (fr)
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EP1002959A3 (en
EP1002959A2 (en
Inventor
Steffen Madsen
Kristian Knudsen
Pia Munkholm-Jacobsen
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Grundfos AS
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Grundfos AS
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Publication of EP1002959A3 publication Critical patent/EP1002959A3/en
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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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the invention is based on a centrifugal pump unit according to the preamble of claim 1.
  • the general structure of a pump housing, with an electric drive motor is connected consists of wall parts made of metal or Plastic castings or molded from sheet metal parts. These wall parts including a mounting flange of the motor for its attachment the pump housing usually have holes and threaded holes on and are connected to each other by means of screws.
  • a screwless connection of the wall parts of the pump housing allow each other, in the form of bayonet training on Motor and on the pump housing.
  • the types of connection are very consuming in the production and therefore with correspondingly high production costs connected.
  • FIG. 1 Another US patent US-A-2 370 202 describes a vacuum pump.
  • This pump is powered by an electric motor mounted on his Pump side has several feet, which are at the bottom wall of the vacuum pump are screwed on.
  • the rest of the pump housing consists of a one-piece top wall, which has a central intake pipe which is connected to a vacuum suction line connected. Between the lower wall and the upper wall is circumferential at least one exit slot for discharging air to generate the vacuum released in the vacuum suction line.
  • the lower wall of the pump housing has at its periphery a plurality of support legs of sufficient length, so that the Motor with the pump placed vertically on a floor surface or the like can be.
  • the snaps consist of an eyelet with a hinged thereto, hand-operated lever.
  • the object of the invention is thus to provide a centrifugal pump unit of in the introduction, so as to improve the pump housing construction cheaper to produce and easier for maintenance and repair is faster to assemble and disassemble.
  • the Pump housing can be easily made of sheet metal parts or in the form of castings, z. B. made of plastic, to be joined together Wall parts of the pump housing are shaped so that they do not have through holes, Have threaded holes or bayonet training. Instead, the wall parts at their contact points with restraining contact surfaces or depressions provided, and by means of simple, arcuate Klammem, the cost-effective an automatic production line can be made, all Wall parts of the unit held together by clamping force.
  • centrifugal pump assembly is that the peripheral wall part at its two ends depending on an annular flange having, wherein the annular flanges a safe investment for the corresponding Form end wall parts of the pump housing.
  • the peripheral wall part can be adjusted at any angle with respect to its outlet nozzle, as it is most favorable for the particular application.
  • peripheral wall part along a portion of its circumference provided with a spiral bulge be tangentially open and an adjoining outlet having.
  • the rest of the structure of the pump housing an annular foot part, which together with the suction-side end plate and the peripheral wall part at the pump wall part forming Wall part of the engine assembly is clamped.
  • the centrifugal pump unit comprises a Engine assembly 2 and a centrifugal pump 3.
  • the unit 1 is for example a Submersible pump unit, however, can also be an aggregate that is not in one Submerged pumped medium is operated.
  • the pump is 3 in usually provided with an intake for a suction line.
  • the motor assembly comprises an electric drive motor 4 of conventional design, so that this is not explained in detail in its basic structure.
  • the engine assembly further comprises at least one wall part 5 at its pump-side end, with the motor 4 is permanently connected and forms a pump housing wall part.
  • the electric drive motor 4 carries on its drive shaft 6 a replaceable Rotor 7 for conveying the respective pumped medium.
  • the electric Drive motor 4, the wall part 5, which in its function is part of the pump 3, and the impeller 7 form the motor assembly 2.
  • the wall part 5 is annularly formed of stainless sheet material and in Cross section advantageously profiled designed such that a circumferential groove 5a formed is that receives a sealing ring (not shown).
  • the circumferential groove can for example, have an inverted V-shape. Because of this groove training This results in a recessed inner region 5b of the wall part 5, which serves as a latching depression serves, as will become clear.
  • the centrifugal pump 3 comprises a pump housing 8, the structure of which, as already mentioned, partially formed from the wall part 5 of the motor assembly 2.
  • the pump housing 8 further consists of a separate, e.g. concentric Circumferential wall part 9 and a suction-side end plate 10, the one has central suction hole 11, as shown in FIG. 2 shows. Both parts can be made of stainless Sheet metal exist.
  • the suction-side end plate 10 has a circumferential groove 10 a, into which a Gasket (not shown) is inserted.
  • the circumferential groove 10a preferably has a V shape.
  • the end plate 10 has a recessed Interior 10b, which serves as a detent recess, as will become clear.
  • the end plate 10 may be profiled in cross-section so as to provide favorable suction conditions to ensure the gyro 7.
  • the pump housing 8 is substantially a rotationally symmetric body which is cylindrical along its axial extent or, as shown in Figs. 1 and 2, slightly convex.
  • the peripheral wall part 9 advantageously has an inwardly directed one each at its ends Ring flange 12 and 13, wherein each annular flange as a contact surface for the upper wall part 5 and the lower end plate 10 of the pump housing 3rd serves. Due to the in the circumferential grooves 5a and 10a of the wall parts 5 and 10th provided sealing rings is the pump housing 3 in the region of the annular flanges 12 and 13 sealed liquid-tight.
  • the recessed interior areas 5b and 10b of the wall part 5 and the connection plate 10 have on their outer periphery advantageous depending on an axial step education 5 c or 10 c low height, on the the ring flanges 12, 13 can center.
  • the peripheral wall part 9 has an outwardly directed outlet port 14, the is radially extending in the case shown, but also laterally offset the means off-center, can be arranged. Between the wall part 5 and the end plate 10, the peripheral wall part 9 with the outlet port 14 in any circumferential angular position positionable.
  • the peripheral wall part 9 may consist of a pipe piece or alternatively of a Metal strips consist, the circular bent and the ends together are welded.
  • the end-side peripheral regions of this wall part 9 are advantageously bent inwardly and thereby form the annular flanges 12 and 13th
  • the wall parts 5 and 9 and the end plate 10 of the pump housing 8 are held together by at least one clamping clamping and retaining element 15.
  • a plurality, and advantageously four such elements 15 provided circumferentially are arranged approximately evenly distributed.
  • the peripheral wall part 9 still has solid, suitable clamping means, for. B. short tongue parts, which the wall part 5 of the motor assembly 2 and the lower Locking plate 10 clamped to the peripheral wall part 9 hold, if the only element 15 is provided opposite.
  • That or these holding elements 15 preferably consist of an arcuate bracket with end-side Locking means 16.
  • the locking means 16 engage in the counter-locking means of the wall part 5 and the suction-side end plate 10, wherein the counter-locking means are formed by the already mentioned recessed inner regions 5b and 10b.
  • brackets especially when disassembling the pump housing 3 easy
  • this wall part along a portion of its circumference with a partial spiral bulge be provided (not shown).
  • the bulge is at its greatest radial Extension formed open, and at this open end of the bulge closes an outlet according to the outlet 14 of vorstehned described peripheral wall part 9 at.
  • a spiral is correct Pump housing with the pump housing described further above 8 match.
  • the pump housing 8 with an annular Provided foot part 18, which also by clamping attachment to the Pump housing is held.
  • the foot has an upper, annular Edge region 19 with locking recesses 20 for the clamp-shaped clamping and Retaining elements 15.
  • the foot part with the edge area in the recessed inner portion 10 b of the suction-side end plate 10 is inserted, and the lower locking means 16 of the clamp-shaped elements 15 engage in the locking recesses 20, so that the foot part together with the suction-side end plate 10 is held clamped to the peripheral wall part 9.
  • That too Foot part 18 may be formed of stainless sheet material.

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

Description

Die Erfindung geht aus von einem Kreiselpumpenaggregat gemäß dem Oberbegriff des Anspruchs 1.The invention is based on a centrifugal pump unit according to the preamble of claim 1.

Der allgemeine Aufbau eines Pumpengehäuses, das mit einem elektrischen Antriebsmotor verbunden ist, besteht aus Wandteilen, die aus Metall- oder Kunststoffgussteilen oder aus Blechformteilen geformt sind. Diese Wandteile einschließlich eines Befestigungsflansches des Motors zu dessen Befestigung an dem Pumpengehäuse weisen in der Regel Löcher und Gewindelöcher auf und werden mittels Schrauben miteinander verbunden. Andererseits sind auch Lösungen bekannt, die eine schraubenlose Verbindung der Wandteile des Pumpengehäuses miteinander gestatten, und zwar in Form von Bajonettausbildungen am Motor und am Pumpengehäuse. Die genannten Verbindungsarten sind jedoch sehr aufwendig in der Herstellung und daher mit dementsprechend hohen Herstellungskosten verbunden. Ein weiterer Nachteil besteht darin, dass zur Durchführung von Wartungsarbeiten eine erhebliche Zeit für die Demontage und die Wiedermontage des Pumpengehäuses vom bzw. am Motor aufgewendet werden muss, wobei im Falle von verschraubten Wandteilen entsprechende Werkzeuge erforderlich sind. Auch das Lösen und Wiederzusammenfügen von Bajonettverbindungen bedarf einer erheblichen Kraftanstrengung und Sorgfalt.The general structure of a pump housing, with an electric drive motor is connected, consists of wall parts made of metal or Plastic castings or molded from sheet metal parts. These wall parts including a mounting flange of the motor for its attachment the pump housing usually have holes and threaded holes on and are connected to each other by means of screws. On the other hand, there are solutions known that a screwless connection of the wall parts of the pump housing allow each other, in the form of bayonet training on Motor and on the pump housing. However, the types of connection are very consuming in the production and therefore with correspondingly high production costs connected. Another disadvantage is that to carry out Maintenance takes a considerable amount of time for disassembly and reassembly the pump housing must be used by or on the engine, wherein in Case of bolted wall parts appropriate tools are required. The loosening and reassembly of bayonet connections also requires a considerable effort and care.

In der US-Patentschrift US-A-3 491 696, von der der Oberbegriff des Anspruchs 1 der vorliegenden Erfindung ausgeht, ist eine Sanitärpumpe, die von einem Elektromotor angetrieben wird, beschrieben. Der Elektromotor hat auf seiner Pumpenseite einen den Motor und die Pumpe verbindenden Kupplungsaufbau, der ein festes Wandteil aufweist, an dem das trichterförmige Gehäuse der Sanitärpumpe mittels mehrerer, umfangsmäßig verteilter Bolzen und Flügelmuttern lösbar befestigt ist. Das Laufrad der Pumpe sitzt auf einem Wellenstück, das selbst innerhalb des Kupplungsaufbaus an der Motorwelle angeschraubt ist. Zwischen dem Laufrad und dem festen Wandteil ist des Weiteren eine ebene Pumpengehäusewand vorgesehen, die zwischen dem trichterförmigen Pumpengehäuse und dem festen Wandteil eingeklemmt ist. Aufgrund der besonderen Bauweise des Pumpenlaufrades ist das Pumpengehäuse einstückig ausgebildet und hat saugseitig einen Ansaugstutzen und abförderseitig einen üblichen Druckstutzen.In US-A-3 491 696, from which the preamble of claim 1 of the present invention, is a sanitary pump, by a Electric motor is driven, described. The electric motor has on his Pump side connecting the engine and the pump coupling structure, the a fixed wall part, on which the funnel-shaped housing of the sanitary pump by means of several circumferentially distributed bolts and wing nuts solvable is attached. The impeller of the pump sits on a shaft piece that itself is bolted to the motor shaft within the coupling structure. Between the impeller and the fixed wall part is further a flat pump housing wall provided between the funnel-shaped pump housing and the fixed wall part is clamped. Due to the special design of the pump impeller the pump housing is integrally formed and has a suction side Intake manifold and discharge side a usual discharge nozzle.

In einer weiteren US-Patentschrift US-A-2 370 202 ist eine Vakuumpumpe beschrieben. Diese Pumpe wird von einem Elektromotor angetrieben, der auf seiner Pumpenseite mehrere Füße aufweist, die an der Unterwand der Vakuumpumpe angeschraubt sind. Das übrige Pumpengehäuse besteht aus einer einteiligen Oberwand, die ein zentrales Ansaugrohr aufweist, das an einer Vakuumsaugleitung angeschlossen ist. Zwischen der Unterwand und der Oberwand ist umfangsmäßig wenigstens ein Austrittsschlitz zum Abfördem von Luft zum Erzeugen des Vakuums in der Vakuumsaugleitung freigelassen. Die Unterwand des Pumpengehäuses weist an ihrem Umfang mehrere Stützbeine ausreichender Länge auf, so dass der Motor mit der Pumpe auf einer Bodenfläche oder dergleichen vertikal aufgestellt werden kann. Am Umfang der Unterwand sind mehrere Schnappverschlüsse mit Übertotpunktfunktion vorgesehen, die Ansätzen der Oberwand des Pumpengehäuses angreifen, um die Oberwand an der Unterwand des Pumpengehäuses lösbar zu befestigen. Die Schnappverschlüsse bestehen aus einer Öse mit einem daran angelenkten, handbetätigbaren Hebel.Another US patent US-A-2 370 202 describes a vacuum pump. This pump is powered by an electric motor mounted on his Pump side has several feet, which are at the bottom wall of the vacuum pump are screwed on. The rest of the pump housing consists of a one-piece top wall, which has a central intake pipe which is connected to a vacuum suction line connected. Between the lower wall and the upper wall is circumferential at least one exit slot for discharging air to generate the vacuum released in the vacuum suction line. The lower wall of the pump housing has at its periphery a plurality of support legs of sufficient length, so that the Motor with the pump placed vertically on a floor surface or the like can be. On the circumference of the lower wall are several snap closures with Übertotpunktfunktion provided, the approaches of the top wall of the pump housing Attack to the top wall on the bottom wall of the pump housing releasably secure. The snaps consist of an eyelet with a hinged thereto, hand-operated lever.

Die Aufgabe der Erfindung besteht somit darin, ein Kreiselpumpenaggregat der einleitend angeführten Art so zu verbessern, dass es bezüglich des Pumpengehäuseaufbaus billiger herstellbar und für Wartungs- und Reparaturzwecke leichter und schneller montierbar und demontierbar ist.The object of the invention is thus to provide a centrifugal pump unit of in the introduction, so as to improve the pump housing construction cheaper to produce and easier for maintenance and repair is faster to assemble and disassemble.

Die Lösung der Aufgabe ist in dem Anspruch 1 angeführt. The solution of the problem is given in the claim 1.

Durch die erfindungsgemäße Lösung sind viele Vorteile des Anmeldungsgegenstandes bezüglich der kostengünstigen Herstellung des Pumpengehäuses und seiner Montage und Demontage selbst sowie an dem Antriebsmotor verwirklicht. Das Pumpengehäuse kann auf einfache Weise aus Blechteilen oder in Form von Gussteilen, z. B. aus Kunststoff, hergestellt werden, wobei miteinander zu verbindende Wandteile des Pumpengehäuses so geformt sind, dass sie keine Durchgangslöcher, Gewindelöcher oder Bajonettausbildungen aufweisen. Statt dessen sind die Wandteile an ihren Anlagestellen mit rastfähigen Anlageflächen oder Vertiefungen versehen, und mittels einfacher, bogenförmiger Klammem, die kostengünstig auf einer Automatikfertigungslinie hergestellt werden können, werden sämtliche Wandteile des Aggregates durch Klemmkraft zusammengehalten. Das Lösen und Wtederzusammensetzen solcher Elemente ist denkbar einfach, so dass das Aggregat zu Wartungszwecken von Hand und ohne Spezialwerkzeug leicht und schnell auseinandergenommen und wieder zusammengesetzt werden kann. Ein weiterer Vorteil besteht darin, dass die pumpenseitige Wand der Motorbaueinheit bereits einen Wandbereich des Pumpengehäuses bildet. Der übrige Aufbau des Pumpengehäuses wird dann mittels der Klammern an der Wand der Motorbaueinheit angeklemmt gehalten. Ein noch weiterer Vorteil besteht noch darin, dass Kreiselrad und der wesentliche Teil des Pumpengehäuses bei gleicher Motorbaueinheit auswechselbar sind.By the solution according to the invention are many advantages of the subject of the application with regard to the cost-effective production of the pump housing and its Assembly and disassembly itself and implemented on the drive motor. The Pump housing can be easily made of sheet metal parts or in the form of castings, z. B. made of plastic, to be joined together Wall parts of the pump housing are shaped so that they do not have through holes, Have threaded holes or bayonet training. Instead, the wall parts at their contact points with restraining contact surfaces or depressions provided, and by means of simple, arcuate Klammem, the cost-effective an automatic production line can be made, all Wall parts of the unit held together by clamping force. Solving and The composition of such elements is very simple, so that the aggregate for maintenance purposes by hand and without special tools easily and can be quickly taken apart and reassembled. One Another advantage is that the pump-side wall of the motor assembly already forms a wall portion of the pump housing. The remaining construction of the Pump housing is then attached to the wall of the motor assembly by means of the clamps kept clamped. Yet another advantage is that Rotor and the essential part of the pump housing with the same engine assembly are interchangeable.

Eine vorteilhafte Ausgestaltung des erfindungsgemäßen Kreiselpumpenaggregates besteht darin, dass das Umfangswandteil an seinen beiden Enden je einen Ringflansch aufweist, wobei die Ringflansche eine sichere Anlage für die entsprechenden endseitigen Wandteile des Pumpengehäuses bilden. Das Umfangswandteil kann bezüglich seines Auslaßstutzens in beliebigem Winkel eingestellt werden, wie es für den jeweiligen Anwendungsfall am günstigsten ist.An advantageous embodiment of the centrifugal pump assembly according to the invention is that the peripheral wall part at its two ends depending on an annular flange having, wherein the annular flanges a safe investment for the corresponding Form end wall parts of the pump housing. The peripheral wall part can be adjusted at any angle with respect to its outlet nozzle, as it is most favorable for the particular application.

In einer weiteren vorteilhaften Ausgestaltung kann das Umfangswandteil entlang eines Abschnittes seines Umfanges mit einer spiralförmigen Ausbauchung versehen sein, die tangential offen ist und einen sich daran anschließenden Auslaßstutzen aufweist. In a further advantageous embodiment, the peripheral wall part along a portion of its circumference provided with a spiral bulge be tangentially open and an adjoining outlet having.

In einer anderen vorteilhaften Ausgestaltung weist der übrige Aufbau des Pumpengehäuses ein ringförmiges Fußteil auf, das zusammen mit der saugseitigen Abschlußplatte und dem Umfangswandteil an dem den Pumpenwandteil bildenden Wandteil der Motorbaueinheit klemmbefestigt ist.In another advantageous embodiment, the rest of the structure of the pump housing an annular foot part, which together with the suction-side end plate and the peripheral wall part at the pump wall part forming Wall part of the engine assembly is clamped.

Die Erfindung ist nachstehend anhand eines in den anliegenden Zeichnungen dargestellten Ausführungsbeispieles näher erläutert. Es zeigen:

Fig. 1
eine Seitenansicht auf das Ausfuhrungsbeispiel,
Fig. 2
eine Seitenansicht auf eine auseinandergezogene Darstellung des Ausführungsbeispieles.
The invention is explained below with reference to an embodiment illustrated in the accompanying drawings. Show it:
Fig. 1
a side view of the exemplary embodiment,
Fig. 2
a side view of an exploded view of the embodiment.

Nach Fig. 1 umfasst das allgemein mit 1 bezeichnete Kreiselpumpenaggregat eine Motorbaueinheit 2 und eine Kreiselpumpe 3. Das Aggregat 1 ist beispielsweise ein Tauchpumpenaggregat, kann jedoch auch ein Aggregat sein, dass nicht in ein Fördermedium eingetaucht betrieben wird. In diesem Fall ist die Pumpe 3 in üblicher Weise mit einem Ansaugstutzen für eine Ansaugleitung versehen.According to FIG. 1, the centrifugal pump unit, generally designated 1, comprises a Engine assembly 2 and a centrifugal pump 3. The unit 1 is for example a Submersible pump unit, however, can also be an aggregate that is not in one Submerged pumped medium is operated. In this case the pump is 3 in usually provided with an intake for a suction line.

Die Motorbaueinheit umfaßt einen elektrischen Antriebsmotor 4 üblicher Bauart, so daß dieser in seinem Grundaufbau nicht näher erläutert ist. Die Motorbaueinheit umfaßt weiter mindestens ein Wandteil 5 an ihrem pumpenseitigen Ende, das mit dem Motor 4 ständig fest verbunden ist und einen Pumpengehäusewandteil bildet. Der elektrische Antriebsmotor 4 trägt auf seiner Antriebswelle 6 ein austauschbares Kreiselrad 7 zur Förderung des jeweiligen Fördermediums. Der elektrische Antriebsmotor 4, das Wandteil 5, das in seiner Funktion ein Bestandteil der Pumpe 3 ist, sowie das Kreiselrad 7 bilden die Motorbaueinheit 2.The motor assembly comprises an electric drive motor 4 of conventional design, so that this is not explained in detail in its basic structure. The engine assembly further comprises at least one wall part 5 at its pump-side end, with the motor 4 is permanently connected and forms a pump housing wall part. The electric drive motor 4 carries on its drive shaft 6 a replaceable Rotor 7 for conveying the respective pumped medium. The electric Drive motor 4, the wall part 5, which in its function is part of the pump 3, and the impeller 7 form the motor assembly 2.

Das Wandteil 5 ist ringförmig aus rostfreiem Blechmaterial geformt und im Querschnitt vorteilhaft profiliert gestaltet, derart, daß eine Umfangsnut 5a gebildet ist, die einen Dichtungsring (nicht dargestellt) aufnimmt. Die Umfangsnut kann beispielsweise eine umgekehrte V-Form haben. Aufgrund dieser Nutausbildung ergibt sich ein vertiefter Innenbereich 5b des Wandteils 5, der als Rastvertiefung dient, wie noch klar wird.The wall part 5 is annularly formed of stainless sheet material and in Cross section advantageously profiled designed such that a circumferential groove 5a formed is that receives a sealing ring (not shown). The circumferential groove can for example, have an inverted V-shape. Because of this groove training This results in a recessed inner region 5b of the wall part 5, which serves as a latching depression serves, as will become clear.

Die Kreiselpumpe 3 umfaßt ein Pumpengehäuse 8, dessen Aufbau, wie bereits erwähnt, teilweise aus dem Wandteil 5 der Motorbaueinheit 2 gebildet ist. Vorteilhaft besteht das Pumpengehäuse 8 weiter aus einem gesonderten, z.B. konzentrischen Umfangswandteil 9 und aus einer saugseitigen Abschlußplatte 10, die ein zentrales Ansaugloch 11 aufweist, wie Fig. 2 zeigt. Beide Teile können aus rostfreiem Blechmaterial bestehen.The centrifugal pump 3 comprises a pump housing 8, the structure of which, as already mentioned, partially formed from the wall part 5 of the motor assembly 2. Advantageous If the pump housing 8 further consists of a separate, e.g. concentric Circumferential wall part 9 and a suction-side end plate 10, the one has central suction hole 11, as shown in FIG. 2 shows. Both parts can be made of stainless Sheet metal exist.

Die saugseitige Abschlußplatte 10 weist eine Umfangsnut 10a auf, in die ein Dichtungsring (nicht gezeigt) eingelegt wird. Die Umfangsnut 10a hat vorzugsweise eine V-Form. Im übrigen weist auch die Abschlußplatte 10 einen vertieften Innenbereich 10b auf, der als Rastvertiefung dient, wie noch klar wird. Im übrigen kann die Abschlußplatte 10 im Querschnitt so profiliert sein, um günstige Ansaugverhältnisse für das Kreiselrad 7 zu gewährleisten.The suction-side end plate 10 has a circumferential groove 10 a, into which a Gasket (not shown) is inserted. The circumferential groove 10a preferably has a V shape. Moreover, the end plate 10 has a recessed Interior 10b, which serves as a detent recess, as will become clear. Furthermore the end plate 10 may be profiled in cross-section so as to provide favorable suction conditions to ensure the gyro 7.

Als konzentrisches Umfangswandteil 9 ist das Pumpengehäuse 8 im wesentlichen ein rotationssymetrischer Körper, der entlang seiner axialen Erstreckung zylindrisch oder, wie in den Fig. 1 und 2 gezeigt, leicht konvex geformt ist. Das Umfangswandteil 9 weist vorteilhaft an seinen Enden jeweils einen einwärts gerichteten Ringflansch 12 bzw. 13 auf, wobei jeder Ringflansch als Anlagefläche für das obere Wandteil 5 und die untere Abschlußplatte 10 des Pumpengehäuses 3 dient. Aufgrund der in den Umfangsnuten 5a und 10a der Wandteile 5 und 10 vorgesehenen Dichtungsringe ist das Pumpengehäuse 3 im Bereich der Ringflansche 12 und 13 flüssigkeitsdicht abgedichtet. Die vertieften Innenbereiche 5b und 10b des Wandteils 5 bzw. der Anschlußplatte 10 weisen an ihrem Außenumfang vorteilhaft je eine axiale Stufenausbildung 5 c bzw. 10 c geringer Höhe auf, an der sich die Ringflansche 12, 13 zentrieren können.As a concentric peripheral wall part 9, the pump housing 8 is substantially a rotationally symmetric body which is cylindrical along its axial extent or, as shown in Figs. 1 and 2, slightly convex. The peripheral wall part 9 advantageously has an inwardly directed one each at its ends Ring flange 12 and 13, wherein each annular flange as a contact surface for the upper wall part 5 and the lower end plate 10 of the pump housing 3rd serves. Due to the in the circumferential grooves 5a and 10a of the wall parts 5 and 10th provided sealing rings is the pump housing 3 in the region of the annular flanges 12 and 13 sealed liquid-tight. The recessed interior areas 5b and 10b of the wall part 5 and the connection plate 10 have on their outer periphery advantageous depending on an axial step education 5 c or 10 c low height, on the the ring flanges 12, 13 can center.

Das Umfangswandteil 9 weist einen auswärts gerichteten Auslaßstutzen 14 auf, der im gezeigten Fall radial verlaufend angeordnet ist, aber auch seitlich versetzt das heißt außermittig, angeordnet sein kann. Zwischen dem Wandteil 5 und der Abschlußplatte 10 ist das Umfangswandteil 9 mit dem Auslaßstutzen 14 in beliebiger umfangsmäßiger Winkelstellung positionierbar.The peripheral wall part 9 has an outwardly directed outlet port 14, the is radially extending in the case shown, but also laterally offset the means off-center, can be arranged. Between the wall part 5 and the end plate 10, the peripheral wall part 9 with the outlet port 14 in any circumferential angular position positionable.

Das Umfangswandteil 9 kann aus einemRohrstück oder alternativ aus einem Metallstreifen bestehen, der kreisförmig gebogen und dessen Enden miteinander verschweißt sind. Die endseitigen Umfangsbereiche dieses Wandteils 9 sind vorteilhaft einwärts umgebogen und bilden dadurch die Ringflansche 12 und 13.The peripheral wall part 9 may consist of a pipe piece or alternatively of a Metal strips consist, the circular bent and the ends together are welded. The end-side peripheral regions of this wall part 9 are advantageously bent inwardly and thereby form the annular flanges 12 and 13th

Die Wandteile 5 und 9 sowie die Abschlußplatte 10 des Pumpengehäuses 8 werden durch mindestens ein klemmendes Spann- und Halteelement 15 zusammengehalten. Wie es deutlich aus den Fig. 1 und 2 zu erkennen ist, sind im vorliegenden Fall mehrere, und zwar vorteilhaft vier derartige Elemente 15 vorgesehen, die umfangsmäßig etwa gleichmäßig verteilt angeordnet sind. Wird nur ein loses Element 15 verwendet, besitzt das Umfangswandteil 9 noch feste, geeignete Klemmittel, z. B. kurze Zungenteile, welche das Wandteil 5 der Motorbaueinheit 2 und die untere Abschlußplatte 10 klemmend an dem Umfangswandteil 9 festhalten, wenn das einzige Element 15 gegenüberliegend vorgesehen ist. Das oder diese Halteelemente 15 bestehen vorzugsweise aus einer bogenförmigen Klammer mit endseitigen Rastmitteln 16. Die Rastmittel 16 greifen in die Gegenrastmittel des Wandteiles 5 und der saugseitigen Abschlußplatte 10 ein, wobei die Gegenrastmittel durch die bereits erwähnten vertieften Innenbereiche 5b bzw, 10b gebildet sind. Um die Klammern insbesondere beim Demontieren des Pumpengehäuses 3 einfach handhaben zu können, weisen sie Fortsätze 17 auf, die eine Person von Hand und ohne Spezialwerkzeug schnell und einfach betätigen kann.The wall parts 5 and 9 and the end plate 10 of the pump housing 8 are held together by at least one clamping clamping and retaining element 15. As can be seen clearly from FIGS. 1 and 2, in the present case a plurality, and advantageously four such elements 15 provided circumferentially are arranged approximately evenly distributed. Will only one loose element 15 used, the peripheral wall part 9 still has solid, suitable clamping means, for. B. short tongue parts, which the wall part 5 of the motor assembly 2 and the lower Locking plate 10 clamped to the peripheral wall part 9 hold, if the only element 15 is provided opposite. That or these holding elements 15 preferably consist of an arcuate bracket with end-side Locking means 16. The locking means 16 engage in the counter-locking means of the wall part 5 and the suction-side end plate 10, wherein the counter-locking means are formed by the already mentioned recessed inner regions 5b and 10b. To the brackets especially when disassembling the pump housing 3 easy To be able to handle, they have extensions 17, which a person by hand and can operate quickly and easily without special tools.

In alternativer Ausführungsform des Umfangwandteiles 9 kann dieses Wandteil entlang eines Abschnittes seines Umfangs mit einer teilspiralförmigen Ausbauchung (nicht gezeigt) versehen sein. Die Ausbauchung ist an ihrer größten radialen Erstreckung offen ausgebildet, und an dieses offene Ende der Ausbauchung schließt sich ein Auslaßstutzen entsprechend dem Auslaßstutzen 14 des vorstehned beschriebenen Umfangswandteiles 9 an. Im übrigen stimmt ein solches spiralförmiges Pumpengehäuse mit dem weiter vorstehend beschriebenen Pumpengehäuse 8 überein.In an alternative embodiment of the peripheral wall part 9, this wall part along a portion of its circumference with a partial spiral bulge be provided (not shown). The bulge is at its greatest radial Extension formed open, and at this open end of the bulge closes an outlet according to the outlet 14 of vorstehned described peripheral wall part 9 at. For the rest, such a spiral is correct Pump housing with the pump housing described further above 8 match.

In weiterer Ausgestaltung der Pumpe 3 ist das Pumpengehäuse 8 mit einem ringförmigen Fußteil 18 versehen, welches ebenfalls durch Klemmbefestigung an dem Pumpengehäuse gehalten wird. Das Fußteil besitzt einen oberen, ringförmigen Randbereich 19 mit Rastvertiefungen 20 für die klammerförmigen Spann- und Halteelemente 15. Bei seiner Montage wird das Fußteil mit dem Randbereich in den vertieften Innenbereich 10b der saugseitigen Abschlußplatte 10 eingesetzt, und die unteren Rastmittel 16 der klammerförmigen Elemente 15 greifen in die Rastvertiefungen 20 ein, so daß das Fußteil zusammen mit der saugseitigen Abschlußplatte 10 an dem Umfangswandteil 9 klemmbefestigt gehalten wird. Auch das Fußteil 18 kann aus rostfreiem Blechmaterial geformt sein.In a further embodiment of the pump 3, the pump housing 8 with an annular Provided foot part 18, which also by clamping attachment to the Pump housing is held. The foot has an upper, annular Edge region 19 with locking recesses 20 for the clamp-shaped clamping and Retaining elements 15. During its assembly, the foot part with the edge area in the recessed inner portion 10 b of the suction-side end plate 10 is inserted, and the lower locking means 16 of the clamp-shaped elements 15 engage in the locking recesses 20, so that the foot part together with the suction-side end plate 10 is held clamped to the peripheral wall part 9. That too Foot part 18 may be formed of stainless sheet material.

Claims (8)

  1. A centrifugal pump unit, consisting of an electric motor (4) and of a centrifugal pump driven by this, with an impeller (7) and with a pump housing (8) surrounding this, wherein a motor construction unit is formed which also comprises the impeller (7) and at least a wall part (5) for the pump (3), and wherein the remaining construction of the pump housing (8) comprises a central exit hole (11) and an exit union (14) and is detachably connected to the motor construction unit (2) via at least one clamping tightening and holding element (15), characterised in that the wall part (5) of the motor construction unit (2) forms a wall part for the pump housing (8), that the remaining construction of the pump housing (8) comprises a peripheral wall part (9) with the outlet union (14) departing outwardly from it, and a suction side terminal plate (10) with the central suction hole (11), that the wall part (5) of the motor construction unit (2) forming the pump housing wall, and the suction-side terminal plate (10) bear on the peripheral wall part (9) in a clamp-fastened manner by way of the tightening and holding element (15), that the peripheral wall part (9) is formed from a tube piece or from a metal strip which is bent in a circular manner and welded to one another at the two ends, that the or each tightening and holding element (15) consists of an arc-like clip with a hand-actuatable continuation (17) and with locking means (16) at the end side, and that these locking means shap into counter locking means in the form in each case of a deepened region (5b, 10b) of the wall part (5) and of the terminal plate (10),
  2. A unit according to claim 1 or 2, characterised in that the peripheral wall part (9) at its two ends in each case have an inwardly directed, circular ring flange as a bearing surface for the wall part (5) and the terminal plate (10).
  3. A unit according to claim 1 or 2, characterised in that that the peripheral wall part (9) is formed in a convex manner along its axial extension.
  4. A unit according to claim 1 or 2, characterised in that the peripheral wall part (9) is formed cylindrically along its axial extension.
  5. A unit according to claim 1 or 2, characterised in that the peripheral wall part (9) along a section of its periphery is provided with a spiral, tangentially open bulge, and that the outlet union (14) of the peripheral wall part follows the open end of the bulge.
  6. A unit according to one of the claims 1 to 5, characterised in that the remaining construction of the pump housing (8) comprises an annular foot part (18) which together with the suction-side terminal plate (10) and the peripheral wall part (9) is fastened in a clamped manner on the wall part (5) of the motor construction unit (2) which forms the pump wall part.
  7. A unit according to one of the claims 1 to 6, characterised in that the wall part (5), the peripheral wall part (9) and the terminal plate (10) of the pump housing (8) and the foot part (18) are formed of stainless sheet metal material.
  8. A unit according to one of the claims 1 to 7, characterised in that the deepened inner region (5b, 10b) of the wall part (5) of the motor construction unit and of the terminal plate (10), said wall part forming the pump wall part, in each case comprise an axial step formation (5c, 10c).
EP99122438A 1998-11-19 1999-11-11 Centrifugal pump assembly Expired - Lifetime EP1002959B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853400A DE19853400C1 (en) 1998-11-19 1998-11-19 Centrifugal pump unit
DE19853400 1998-11-19

Publications (3)

Publication Number Publication Date
EP1002959A2 EP1002959A2 (en) 2000-05-24
EP1002959A3 EP1002959A3 (en) 2000-08-30
EP1002959B1 true EP1002959B1 (en) 2005-06-08

Family

ID=7888356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99122438A Expired - Lifetime EP1002959B1 (en) 1998-11-19 1999-11-11 Centrifugal pump assembly

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EP (1) EP1002959B1 (en)
DE (2) DE19853400C1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4878763B2 (en) * 2005-03-18 2012-02-15 株式会社不二工機 Mounting structure of drainage pump to indoor unit
DE102006016981A1 (en) * 2006-04-06 2007-10-11 Alfred Kärcher Gmbh & Co. Kg submersible pump
DE102006045797B4 (en) * 2006-09-26 2011-08-25 Hanning Elektro-Werke GmbH & Co. KG, 33813 Pump and assembly process

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1302474B (en) * 1970-12-03
US2370202A (en) * 1942-09-14 1945-02-27 Crown Cork & Seal Co Vacuum producing apparatus
GB1128523A (en) * 1965-06-25 1968-09-25 Ass Elect Ind Improvements in centrifugal pumps
US3425315A (en) * 1968-02-19 1969-02-04 North American Rockwell Strand carrier for braiding machines
US3491696A (en) * 1968-10-11 1970-01-27 Henry H Howard Centrifugal pump
DE1959087A1 (en) * 1969-11-25 1971-05-27 Hanning Elektro Werke Housing for motor pumps
US3819297A (en) * 1972-09-11 1974-06-25 Gen Gas Light Co Centrifugal pump assembly
US3953146A (en) * 1974-08-15 1976-04-27 Whirlpool Corporation Apparatus for treating lint in an automatic washer
US4904166A (en) * 1988-11-30 1990-02-27 White Consolidated Industries, Inc. Vertical axis motor-pump assembly for clothes washing machine

Also Published As

Publication number Publication date
DE59912145D1 (en) 2005-07-14
EP1002959A3 (en) 2000-08-30
DE19853400C1 (en) 2000-07-20
EP1002959A2 (en) 2000-05-24

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