EP1770283B1 - Pump comprising an integrated motor - Google Patents

Pump comprising an integrated motor Download PDF

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Publication number
EP1770283B1
EP1770283B1 EP06026954A EP06026954A EP1770283B1 EP 1770283 B1 EP1770283 B1 EP 1770283B1 EP 06026954 A EP06026954 A EP 06026954A EP 06026954 A EP06026954 A EP 06026954A EP 1770283 B1 EP1770283 B1 EP 1770283B1
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EP
European Patent Office
Prior art keywords
rotor
pump
pump according
impeller
ring
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Active
Application number
EP06026954A
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German (de)
French (fr)
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EP1770283A1 (en
Inventor
Michal Kalavsky
Pietro De Filippis
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP1770283A1 publication Critical patent/EP1770283A1/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
    • 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
    • F04D13/0606—Canned motor pumps
    • F04D13/064—Details of the magnetic circuit
    • 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
    • F04D13/0606—Canned motor pumps
    • F04D13/0633—Details of the bearings
    • 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

Definitions

  • the present invention relates to a pump with integrated, electronically commutated wet-rotor motor.
  • Such pumps are for example FR 2 608 228 A1 .
  • a shaft rotates with a rotor of the motor in a rotor chamber and an impeller of the pump in a hydraulic chamber.
  • a bearing plate with a plain bearing for supporting the shaft and a rubber seal to protect the sliding bearing against contamination and corrosion by the water.
  • This bearing shield prevents water from flowing from the hydraulic chamber into the rotor chamber. If a defect occurs on the sealing rubber, the water can enter the rotor chamber. This contamination by the water and corrosion can cause damage to the sleeve bearing and the rotor chamber.
  • the object of the invention is to provide a pump with integrated, electronically commutated wet-rotor motor, which is protected in a simple manner against damage.
  • the pump chamber is constantly cleaned by water flow during the pumping process, so that no strong contamination of the water occurs.
  • the rotor can be cooled by the water flow.
  • the pump chamber is formed by a front housing shell and a shield of the engine. To this Way, it is possible to reduce the size of the pump, as can be dispensed with a bearing plate between the rotor and an impeller of the pump.
  • the shield is cup-shaped.
  • the rotor can be covered by the shield with the least possible gap, resulting in a high volume utilization of the engine.
  • the pump has a rotationally mounted axle on which the rotor is rotatably mounted.
  • the axis for vibration damping in the shield is mounted in at least one O-ring, which is preferably formed of rubber.
  • the rotor is supported by at least one radial sliding bearing on the axle. In this way, the life of the sliding bearing is increased because it rotates together with the rotor on the axis.
  • the radial sliding bearing is held in the rotor by an O-ring.
  • tolerances in the plain bearing receptacle of the rotor can be compensated by the elastic O-ring, so that the sliding bearing is concentric on the axis.
  • vibrations of the rotor are damped by the O-ring, so that the requirement for vibration damping of the axle can be reduced.
  • the rotor is supported by a thrust bearing on the axle.
  • This has the advantage that the thrust bearing reduces axial play of the rotor.
  • the sliding bearing and / or the thrust bearing on a liquid seal, in particular with a sealing rubber and / or an O-ring.
  • a sealing rubber and / or an O-ring In this way, the sliding bearing and / or the thrust bearing is sealed during the pumping process, so that a water flow through the sliding bearing and / or by the axial bearing is prevented and thus no corrosion can occur in the bearings.
  • the rotor has an interior which is subdivided into two subregions tapering conically towards one another.
  • a predetermined breaking point is provided in two parts for entered into the interior and freezing water, whereby the on the rotor in radial and axial direction tensile stresses can be reduced.
  • the two sections are arranged between two radial plain bearings, wherein the two radial plain bearings are each held in the rotor with an elastic O-ring, so that the freezing water can expand in the axial direction by slight displacements of the radial plain bearings.
  • the rotor has an impeller.
  • the impeller is integrally formed on the rotor. In this way, an assembly of the pump is simplified, since the number of separate components is reduced.
  • the rotor is plastic coated. This ensures in a simple manner that the rotor is waterproof. The epicn thus is a one-piece design of the rotor with the impeller made of plastic very easy to perform.
  • FIG. 1 and the FIG. 2 show a section through a pump with integrated, electronically commutated wet rotor motor.
  • the housing of the pump 1 is composed of a front housing shell 2 and a pot-shaped plate 3, which are both positively connected to each other.
  • the housing of the pump 1 forms a one-piece pump chamber 4, which comprises in its interior a rotor 5 with an impeller 6.
  • the impeller 6 is integrally formed on the rotor 5.
  • the rotor 5 is rotatably mounted on a shaft 9 by a front, the impeller 6 facing slide bearing 7 and by a rear, the shield 3 facing slide bearing 8.
  • the rotor 5 fixed at its two ends by a respective clamping ring 10, 11.
  • the rotor 5 at its front, the impeller 6 facing end to reduce the axial movement of a thrust bearing 12, with a socket for a O-ring 13 between the thrust bearing 12 and the sliding bearing 7.
  • the O-ring 13 By the O-ring 13, the sliding bearing 7 against a liquid inlet, in particular against a water inlet, sealed and elastically centered in the radial direction.
  • a rubber shock absorber 14 is inserted between the thrust bearing 12 and the clamping ring 11, a rubber shock absorber 14 is inserted.
  • the axis 9 is at its front, the impeller 6 end facing in a seat 15 which is fixed by support arms 16 to the front housing shell 2, and at its rear, the shield 3 end facing in a seat 17 which in the shield. 3 is formed rotatably mounted.
  • a compensating element 18 is inserted, which is preferably designed as a rubber disc to compensate for axial changes in length of the axis 9 with temperature fluctuations can.
  • the axis 9 fixed in the seat 17 of the shield 3 by an O-ring 19.
  • the O-rings 13, 19 as well as the compensation element 18 made of rubber, so that vibrations of the rotor 5 and thus the axis 9 can be absorbed.
  • the entire rotor 5 is plastic coated. From the same plastic, the impeller 6 of the pump 1 is formed on the rotor 5.
  • the rotor 5 and the impeller 6 can be manufactured as one piece. This one-piece design is not mandatory, but has the advantage that the number of components is smaller and the problem of fixing the impeller 6 on the rotor 5 is bypassed.
  • stator 21 of the wet-rotor motor is arranged, so it is a so-called internal rotor. It is also an embodiment as an external rotor possible.
  • the electrical connection of the stator 21 is in the form of a resilient contact 22 to an electrical drive circuit, which is arranged on a circuit board 23. In this way it is possible to mount the pump 1 without a special soldering tool.
  • the board 23 is covered by a rear housing shell 24 which is connected by screws 25 to the stator 21 and the cup-shaped shield 3.
  • the impeller 6 In order to improve the flow characteristics within the impeller 6, sitting on the axis 9 as a final piece in front of the front, the impeller 6 facing Clamping ring 11 a shaped head piece 26 which separates the clamping ring 11 of the water-conducting portion 27 of the impeller.
  • the shape of the head piece 26 is adapted to the shape of the impeller 6 such that the flow resistance is minimal.
  • a gap seal 28 is formed, in which the impeller 6 rotates.
  • FIG. 2 are the radial bearings 7, 8 held in the rotor 5 by a respective elastic O-ring 30, 31.
  • these O-rings 30, 31 serve to compensate for tolerances in the plain bearing receptacle of the rotor 5, so that the plain bearings 30, 31 sit concentrically on the axis 9.
  • vibrations of the rotor 5 are damped by the elastic O-rings 30, 31. Therefore, in comparison to the first embodiment according to FIG. 1 be dispensed with the O-ring 19 in the seat 17 of the shield 3 and the rubber shock absorbers 14 for vibration damping of the axle 9.
  • the functionality of the clamping ring 11 already exists in the head piece 26 FIG. 1 integrated, so that can be dispensed with this further component.
  • the interior of the rotor 5 is divided into two conically tapered sections 32, 33. If water enters this interior space of the rotor 5 between the two slide bearings and freezes this water to ice, it breaks up into two parts corresponding to the partial areas 32, 33. When expanding, these two parts can press the radial slide bearings 7, 8 to a slight extent in the axial direction outwards, so that tensile stresses on the rotor 5 are reduced both in the radial and in the axial direction.
  • the pump 1 is designed in particular for use in water-conducting household appliances, such as dishwashers.

Abstract

The single-part chamber (4) of the pump (1) surrounds a motor rotor (5).

Description

Die vorliegende Erfindung betrifft eine Pumpe mit integriertem, elektronisch kommutiertem Nassläufer-Motor.The present invention relates to a pump with integrated, electronically commutated wet-rotor motor.

Solche Pumpen sind z.B. aus FR 2 608 228 A1 , DE 19 633 137 A1 oder DE 1 9 842 169 A1 bekannt.Such pumps are for example FR 2 608 228 A1 . DE 19 633 137 A1 or DE 1 9 842 169 A1 known.

Bei einer herkömmlichen Konstruktion einer Pumpe mit integriertem, elektronisch kommutiertem Motor dreht sich eine Welle mit einem Rotor des Motors in einer Rotorkammer und ein Flügelrad der Pumpe in einer hydraulischen Kammer. Zwischen beiden Kammern befindet sich ein Lagerschild mit einem Gleitlager zur Lagerung der Welle und einem Dichtungsgummi, um das Gleitlager gegen Verschmutzungen und Korrosion durch das Wasser zu schützen. Durch dieses Lagerschild wird ein Wasserfluss von der hydraulischen Kammer in die Rotorkammer verhindert. Tritt ein Defekt an dem Dichtungsgummi auf, so kann das Wasser in die Rotorkammer eintreten. Aufgrund dieser Verschmutzung durch das Wasser und durch Korrosion kann es zu Schäden in dem Gleitlager und in der Rotorkammer kommen. Des weiteren ist bei der herkömmlichen Konstruktion nachteilig, dass aufgrund des Rotorgewichts eine einseitige Abnutzung des Gleitlagers auftritt.In a conventional construction of a pump with an integrated electronically commutated motor, a shaft rotates with a rotor of the motor in a rotor chamber and an impeller of the pump in a hydraulic chamber. Between both chambers is a bearing plate with a plain bearing for supporting the shaft and a rubber seal to protect the sliding bearing against contamination and corrosion by the water. This bearing shield prevents water from flowing from the hydraulic chamber into the rotor chamber. If a defect occurs on the sealing rubber, the water can enter the rotor chamber. This contamination by the water and corrosion can cause damage to the sleeve bearing and the rotor chamber. Furthermore, it is disadvantageous in the conventional construction that due to the rotor weight, a one-sided wear of the sliding bearing occurs.

Aufgabe der Erfindung ist, eine Pumpe mit integriertem, elektronisch kommutiertem Nassläufer-Motor anzugeben, die auf einfache Weise gegen Beschädigung geschützt ist.The object of the invention is to provide a pump with integrated, electronically commutated wet-rotor motor, which is protected in a simple manner against damage.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Bei einer Pumpe, die eine einteilige Pumpenkammer aufweist, die einen Rotor des Nassläufer-Motors umfasst, wird die Pumpenkammer während des Pumpprozesses durch Wasserdurchfluss ständig gereinigt, so dass keine starke Verschmutzung des Wassers auftritt. Ein weiterer Vorteil besteht darin, dass bei dieser Bauart der Rotor durch den Wasserdurchfluss gekühlt werden kann.In a pump having a one-piece pumping chamber, which includes a rotor of the wet-running motor, the pump chamber is constantly cleaned by water flow during the pumping process, so that no strong contamination of the water occurs. Another advantage is that in this design, the rotor can be cooled by the water flow.

Gemäß einer bevorzugten Ausführungsform ist vorgesehen, dass die Pumpenkammer durch eine vordere Gehäuseschale und ein Schild des Motors gebildet ist. Auf diese Weise ist es möglich die Abmessung der Pumpe zu verringern, da auf ein Lagerschild zwischen dem Rotor und einem Flügelrad der Pumpe verzichtet werden kann.According to a preferred embodiment it is provided that the pump chamber is formed by a front housing shell and a shield of the engine. To this Way, it is possible to reduce the size of the pump, as can be dispensed with a bearing plate between the rotor and an impeller of the pump.

Vorzugsweise ist das Schild topfförmig ausgebildet. Auf diese Weise kann der Rotor von dem Schild mit möglichst geringem Zwischenraum umfasst werden, was zu einer hohen Raumvolumenausnutzung des Motors führt.Preferably, the shield is cup-shaped. In this way, the rotor can be covered by the shield with the least possible gap, resulting in a high volume utilization of the engine.

Die Pumpe weist eine drehfest montierte Achse auf, auf welcher der Rotor drehbar gelagert ist. Erfindungsgemäß ist die Achse zur Vibrationsdämpfung in dem Schild in zumindest einem O-Ring gelagert, der vorzugsweise aus Gummi ausgebildet ist.The pump has a rotationally mounted axle on which the rotor is rotatably mounted. According to the invention the axis for vibration damping in the shield is mounted in at least one O-ring, which is preferably formed of rubber.

In einer bevorzugten Ausführungsform ist der Rotor durch zumindest ein radiales Gleitlager auf der Achse gelagert. Auf diese Weise ist die Lebensdauer des Gleitlagers erhöht, da es zusammen mit dem Rotor auf der Achse rotiert.In a preferred embodiment, the rotor is supported by at least one radial sliding bearing on the axle. In this way, the life of the sliding bearing is increased because it rotates together with the rotor on the axis.

Vorzugsweise ist das radiale Gleitlager in dem Rotor durch einen O-Ring gehalten. Somit können Toleranzen in der Gleitlageraufnahme des Rotors durch den elastischen O-Ring ausgeglichen werden, so dass das Gleitlager konzentrisch auf der Achse sitzt. Des weiteren werden Vibrationen des Rotors durch den O-Ring gedämpft, so dass das Erfordernis für eine Vibrationsdämpfung der Achse reduziert werden kann.Preferably, the radial sliding bearing is held in the rotor by an O-ring. Thus, tolerances in the plain bearing receptacle of the rotor can be compensated by the elastic O-ring, so that the sliding bearing is concentric on the axis. Furthermore, vibrations of the rotor are damped by the O-ring, so that the requirement for vibration damping of the axle can be reduced.

Vorzugsweise ist der Rotor durch ein Axiallager auf der Achse gelagert. Dies hat den Vorteil, dass das Axiallager ein axiales Spiel des Rotors verringert.Preferably, the rotor is supported by a thrust bearing on the axle. This has the advantage that the thrust bearing reduces axial play of the rotor.

Vorzugsweise weist das Gleitlager und/oder das Axiallager eine Flüssigkeitsabdichtung auf, insbesondere mit einem Dichtungsgummi und/oder einem O-Ring. Auf diese Weise ist das Gleitlager und/oder das Axiallager während des Pumpprozesses abgedichtet, so dass ein Wasserfluss durch das Gleitlager und/oder durch das Axiallager verhindert wird und somit keine Korrosion in den Lagern auftreten kann.Preferably, the sliding bearing and / or the thrust bearing on a liquid seal, in particular with a sealing rubber and / or an O-ring. In this way, the sliding bearing and / or the thrust bearing is sealed during the pumping process, so that a water flow through the sliding bearing and / or by the axial bearing is prevented and thus no corrosion can occur in the bearings.

Gemäß einer bevorzugten Ausführungsform ist vorgesehen, dass der Rotor einen Innenraum aufweist, der in zwei aufeinander konisch verjüngend zulaufende Teilbereiche unterteilt ist. Auf diese Weise ist für in den Innenraum eingetretenes und gefrierendes Wasser eine Sollbruchstelle in zwei Teile vorgesehen, wodurch die auf den Rotor in radialer und axialer Richtung wirkenden Zugspannungen reduziert werden können. Insbesondere sind die beiden Teilbereiche zwischen zwei radialen Gleitlagern angeordnet, wobei die zwei radialen Gleitlager mit je einem elastischen O-Ring in dem Rotor gehalten werden, so dass das gefrierende Wasser sich in axialer Richtung durch geringfügige Verschiebungen der radialen Gleitlager ausdehnen kann.According to a preferred embodiment, it is provided that the rotor has an interior which is subdivided into two subregions tapering conically towards one another. In this way, a predetermined breaking point is provided in two parts for entered into the interior and freezing water, whereby the on the rotor in radial and axial direction tensile stresses can be reduced. In particular, the two sections are arranged between two radial plain bearings, wherein the two radial plain bearings are each held in the rotor with an elastic O-ring, so that the freezing water can expand in the axial direction by slight displacements of the radial plain bearings.

Gemäß einer bevorzugten Ausführungsform ist vorgesehen, dass der Rotor ein Flügelrad aufweist. Vorzugsweise ist das Flügelrad einstückig an dem Rotor ausgebildet. Auf diese Weise ist eine Montage der Pumpe vereinfacht, da sich die Anzahl der separaten Bauteile verringert.According to a preferred embodiment, it is provided that the rotor has an impeller. Preferably, the impeller is integrally formed on the rotor. In this way, an assembly of the pump is simplified, since the number of separate components is reduced.

Vorzugsweise ist der Rotor kunststoffummantelt. Somit ist auf einfache Weise sichergestellt, dass der Rotor wasserdicht ist. Des weitern ist somit eine einstückige Ausbildung des Rotors mit dem Flügelrad aus Kunststoff besonders einfach auszuführen.Preferably, the rotor is plastic coated. This ensures in a simple manner that the rotor is waterproof. The weitern thus is a one-piece design of the rotor with the impeller made of plastic very easy to perform.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung zweier Ausführungsbeispiele mit Bezug auf die beigefügten Figuren 1 und 2.Further features and advantages of the invention will become apparent from the following description of two embodiments with reference to the accompanying FIGS. 1 and 2 ,

Die Figur 1 und die Figur 2 zeigen einen Schnitt durch eine Pumpe mit integriertem, elektronisch kommutiertem Nassläufer-Motor.The FIG. 1 and the FIG. 2 show a section through a pump with integrated, electronically commutated wet rotor motor.

Gemäß der Figur 1 und der Figur 2 setzt sich das Gehäuse der Pumpe 1 zusammen aus einer vorderen Gehäuseschale 2 und einem topfförmigen Schild 3, die beide miteinander formschlüssig verbunden sind. Das Gehäuse der Pumpe 1 bildet eine einteilige Pumpenkammer 4, die in ihrem Inneren einen Rotor 5 mit einem Flügelrad 6 umfasst. Vorzugsweise ist das Flügelrad 6 einstückig an dem Rotor 5 ausgebildet.According to the FIG. 1 and the FIG. 2 the housing of the pump 1 is composed of a front housing shell 2 and a pot-shaped plate 3, which are both positively connected to each other. The housing of the pump 1 forms a one-piece pump chamber 4, which comprises in its interior a rotor 5 with an impeller 6. Preferably, the impeller 6 is integrally formed on the rotor 5.

Der Rotor 5 ist durch ein vorderes, dem Flügelrad 6 zugewandtes Gleitlager 7 und durch ein hinteres, dem Schild 3 zugewandtes Gleitlager 8 drehbar auf einer Achse 9 gelagert. Um eine axiale Bewegung des Rotors 5 auf der Achse 9 zu verhindern, ist gemäß Figur 1 der Rotor 5 an seinen beiden Enden durch je einen Klemmring 10, 11 fixiert. Darüber hinaus weist der Rotor 5 an seinem vorderen, dem Flügelrad 6 zugewandten Ende zur Reduzierung der axialen Bewegung ein Axiallager 12 auf, mit einer Fassung für einen O-Ring 13 zwischen dem Axiallager 12 und dem Gleitlager 7. Durch den O-Ring 13 wird das Gleitlager 7 gegenüber einem Flüssigkeitseintritt, insbesondere gegenüber einem Wassereintritt, abgedichtet und in radialer Richtung elastisch zentriert. Zwischen dem Axiallager 12 und dem Klemmring 11 ist ein Gummistoßdämpfer 14 eingefügt.The rotor 5 is rotatably mounted on a shaft 9 by a front, the impeller 6 facing slide bearing 7 and by a rear, the shield 3 facing slide bearing 8. In order to prevent an axial movement of the rotor 5 on the axis 9 is according to FIG. 1 the rotor 5 fixed at its two ends by a respective clamping ring 10, 11. In addition, the rotor 5 at its front, the impeller 6 facing end to reduce the axial movement of a thrust bearing 12, with a socket for a O-ring 13 between the thrust bearing 12 and the sliding bearing 7. By the O-ring 13, the sliding bearing 7 against a liquid inlet, in particular against a water inlet, sealed and elastically centered in the radial direction. Between the thrust bearing 12 and the clamping ring 11, a rubber shock absorber 14 is inserted.

Die Achse 9 ist an ihrem vorderen, dem Flügelrad 6 zugewandten Ende in einem Sitz 15, der durch Tragarme 16 an der vorderen Gehäuseschale 2 fixiert ist, und an ihrem hinteren, dem Schild 3 zugewandten Ende in einem Sitz 17, der in dem Schild 3 ausgebildet ist, drehfest gelagert. In dem Sitz 17 des Schilds 3 ist ein Ausgleichselement 18 eingefügt, das vorzugsweise als Gummischeibe ausgeführt ist, um axiale Längenänderungen der Achse 9 bei Temperaturschwankungen ausgleichen zu können. In radialer Richtung ist in der ersten Ausführungsform gemäß Figur 1 die Achse 9 in dem Sitz 17 des Schilds 3 durch einen O-Ring 19 fixiert. Insbesondere sind die O-Ringe 13, 19 wie auch das Ausgleichselement 18 aus Gummi ausgeführt, so dass Vibrationen des Rotors 5 und damit der Achse 9 absorbiert werden können.The axis 9 is at its front, the impeller 6 end facing in a seat 15 which is fixed by support arms 16 to the front housing shell 2, and at its rear, the shield 3 end facing in a seat 17 which in the shield. 3 is formed rotatably mounted. In the seat 17 of the shield 3, a compensating element 18 is inserted, which is preferably designed as a rubber disc to compensate for axial changes in length of the axis 9 with temperature fluctuations can. In the radial direction is in the first embodiment according to FIG. 1 the axis 9 fixed in the seat 17 of the shield 3 by an O-ring 19. In particular, the O-rings 13, 19 as well as the compensation element 18 made of rubber, so that vibrations of the rotor 5 and thus the axis 9 can be absorbed.

Um die Permanentmagnete 20 des Rotors 5 vor Korrosion zu schützen, ist der gesamte Rotor 5 kunststoffummantelt. Aus dem selben Kunststoff ist an dem Rotor 5 das Flügelrad 6 der Pumpe 1 ausgebildet. Somit können der Rotor 5 und das Flügelrad 6 als ein Stück gefertigt werden. Diese einteilige Ausführung ist nicht zwingend, hat aber den Vorteil, dass die Anzahl der Bauteile geringer und das Problem einer Fixierung des Flügelrades 6 an dem Rotor 5 umgangen ist.In order to protect the permanent magnets 20 of the rotor 5 from corrosion, the entire rotor 5 is plastic coated. From the same plastic, the impeller 6 of the pump 1 is formed on the rotor 5. Thus, the rotor 5 and the impeller 6 can be manufactured as one piece. This one-piece design is not mandatory, but has the advantage that the number of components is smaller and the problem of fixing the impeller 6 on the rotor 5 is bypassed.

Außerhalb des topfförmigen Schilds 6 ist ein Stator 21 des Nassläufer-Motors angeordnet, somit handelt es sich um einen sogenannten Innenläufer. Es ist auch eine Ausführungsform als Außenläufer möglich. Der elektrische Anschluss des Stators 21 ist in Form eines federnden Kontakts 22 zu einer elektrischen Ansteuerschaltung ausgeführt, die auf einer Platine 23 angeordnet ist. Auf diese Weise ist es möglich, die Pumpe 1 ohne ein spezielles Lötwerkzeug zu montieren. Die Platine 23 ist durch eine hintere Gehäuseschale 24 abgedeckt, die durch Schrauben 25 mit dem Stator 21 und dem topfförmigen Schild 3 verbunden ist.Outside the cup-shaped shield 6, a stator 21 of the wet-rotor motor is arranged, so it is a so-called internal rotor. It is also an embodiment as an external rotor possible. The electrical connection of the stator 21 is in the form of a resilient contact 22 to an electrical drive circuit, which is arranged on a circuit board 23. In this way it is possible to mount the pump 1 without a special soldering tool. The board 23 is covered by a rear housing shell 24 which is connected by screws 25 to the stator 21 and the cup-shaped shield 3.

Um die Strömungseigenschaften innerhalb des Flügelrades 6 zu verbessern, sitzt auf der Achse 9 als Abschlussstück vor dem vorderen, dem Flügelrad 6 zugewandten Klemmring 11 ein geformtes Kopfstück 26, welches den Klemmring 11 von dem wasserführenden Bereich 27 des Flügelrads trennt. Die Form des Kopfstückes 26 ist derart an die Form des Flügelrads 6 angepasst, dass der Strömungswiderstand minimal ist. Zwischen dem Flügelrad 6 und der vorderen Gehäuseschale 2 ist eine Spaltdichtung 28 ausgebildet, in der sich das Flügelrad 6 dreht.In order to improve the flow characteristics within the impeller 6, sitting on the axis 9 as a final piece in front of the front, the impeller 6 facing Clamping ring 11 a shaped head piece 26 which separates the clamping ring 11 of the water-conducting portion 27 of the impeller. The shape of the head piece 26 is adapted to the shape of the impeller 6 such that the flow resistance is minimal. Between the impeller 6 and the front housing shell 2, a gap seal 28 is formed, in which the impeller 6 rotates.

Gemäß Figur 2 sind die radialen Gleitlager 7, 8 in dem Rotor 5 durch je einen elastischen O-Ring 30, 31 gehalten. Diese O-Ringe 30, 31 dienen zum einen dazu, Toleranzen in der Gleitlageraufnahme des Rotors 5 auszugleichen, so dass die Gleitlager 30, 31 konzentrisch auf der Achse 9 sitzen. Zum anderen werden durch die elastischen O-Ringe 30, 31 Vibrationen des Rotors 5 gedämpft. Deshalb kann im Vergleich zur ersten Ausführungsform gemäß Figur 1 auf den O-Ring 19 in dem Sitz 17 des Schildes 3 und auf den Gummistoßdämpfer 14 zur Vibrationsdämpfung der Achse 9 verzichtet werden. Des weiteren ist in der zweiten Ausführungsform in das Kopfstück 26 bereits die Funktionalität des Klemmrings 11 gemäß Figur 1 integriert, so dass auf dieses weitere Bauteil verzichtet werden kann.According to FIG. 2 are the radial bearings 7, 8 held in the rotor 5 by a respective elastic O-ring 30, 31. On the one hand, these O-rings 30, 31 serve to compensate for tolerances in the plain bearing receptacle of the rotor 5, so that the plain bearings 30, 31 sit concentrically on the axis 9. On the other hand, vibrations of the rotor 5 are damped by the elastic O-rings 30, 31. Therefore, in comparison to the first embodiment according to FIG. 1 be dispensed with the O-ring 19 in the seat 17 of the shield 3 and the rubber shock absorbers 14 for vibration damping of the axle 9. Furthermore, in the second embodiment, the functionality of the clamping ring 11 already exists in the head piece 26 FIG. 1 integrated, so that can be dispensed with this further component.

Zwischen den beiden Gleitlagern 7, 8 ist der Innenraum des Rotors 5 in zwei aufeinander konisch verjüngend zulaufende Teilbereiche 32, 33 unterteilt. Tritt zwischen die beiden Gleitlager Wasser in diesen Innenraum des Rotors 5 ein und gefriert dieses Wasser zu Eis, so zerbricht es entsprechend den Teilbereichen 32, 33 in zwei Teile. Diese beiden Teile können beim Ausdehnen die radialen Gleitlager 7, 8 in geringen Maße in axialer Richtung nach außen drücken, so dass Zugspannungen auf den Rotor 5 sowohl in radialer, wie auch in axialer Richtung reduziert werden.Between the two plain bearings 7, 8, the interior of the rotor 5 is divided into two conically tapered sections 32, 33. If water enters this interior space of the rotor 5 between the two slide bearings and freezes this water to ice, it breaks up into two parts corresponding to the partial areas 32, 33. When expanding, these two parts can press the radial slide bearings 7, 8 to a slight extent in the axial direction outwards, so that tensile stresses on the rotor 5 are reduced both in the radial and in the axial direction.

Die Pumpe 1 ist insbesondere für einen Einsatz in wasserführenden Haushaltgeräten, wie beispielsweise Geschirrspülmaschinen ausgelegt.The pump 1 is designed in particular for use in water-conducting household appliances, such as dishwashers.

Claims (7)

  1. Pump with integrated, electronically commutated wet-rotor motor, with a one-part pump chamber (4), which encloses a rotor (5) of the wet-rotor motor, and with an axle (9), which is mounted to be secure against rotation and on which the rotor (5) is rotatably mounted, characterised in that the axle (9) is mounted in an end plate (3) of the wet-rotor motor in at least one O-ring (19).
  2. Pump according to claim 1, characterised in that the end plate (3) is of pot-shaped construction.
  3. Pump according to claim 1 or 2, characterised in that the O-ring (19) is made of rubber.
  4. Pump according to any one of the preceding claims, characterised in that an electrical connection of the stator (21) is executed in the form of a resilient contact (22) to a drive control circuit, which is arranged on a circuitboard (23).
  5. Pump according to claim 3, characterised in that the circuitboard (23) is covered by a rear housing shell (24), which is connected by screws (25) with the stator (21) and the pot-shaped end plate (3).
  6. Pump according to any one of the preceding claims, characterised in that the pump (1) is suitable for water-conducting domestic appliances.
  7. Dishwashing machines with a pump according to any one of the preceding claims.
EP06026954A 2003-07-22 2004-07-07 Pump comprising an integrated motor Active EP1770283B1 (en)

Applications Claiming Priority (3)

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DE10333308 2003-07-22
DE10352487A DE10352487A1 (en) 2003-07-22 2003-11-07 Pump with integrated motor
EP04740758A EP1649169B1 (en) 2003-07-22 2004-07-07 Pump comprising an integrated engine

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EP1770283A1 EP1770283A1 (en) 2007-04-04
EP1770283B1 true EP1770283B1 (en) 2009-04-01

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EP06026955A Active EP1777416B1 (en) 2003-07-22 2004-07-07 Pump comprising an integrated motor
EP06026953A Active EP1777415B1 (en) 2003-07-22 2004-07-07 Pump comprising an integrated motor
EP04740758A Active EP1649169B1 (en) 2003-07-22 2004-07-07 Pump comprising an integrated engine
EP06026954A Active EP1770283B1 (en) 2003-07-22 2004-07-07 Pump comprising an integrated motor

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EP06026955A Active EP1777416B1 (en) 2003-07-22 2004-07-07 Pump comprising an integrated motor
EP06026953A Active EP1777415B1 (en) 2003-07-22 2004-07-07 Pump comprising an integrated motor
EP04740758A Active EP1649169B1 (en) 2003-07-22 2004-07-07 Pump comprising an integrated engine

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US (1) US7819640B2 (en)
EP (4) EP1777416B1 (en)
KR (1) KR100776476B1 (en)
CN (1) CN100434720C (en)
AT (4) ATE372464T1 (en)
DE (5) DE10352487A1 (en)
ES (3) ES2293285T3 (en)
PL (1) PL1649169T3 (en)
RU (1) RU2332587C2 (en)
SI (1) SI1649169T1 (en)
WO (1) WO2005015023A1 (en)

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Also Published As

Publication number Publication date
EP1777415B1 (en) 2009-04-01
RU2332587C2 (en) 2008-08-27
EP1770283A1 (en) 2007-04-04
US7819640B2 (en) 2010-10-26
RU2006100277A (en) 2006-07-10
EP1777415A1 (en) 2007-04-25
CN1826470A (en) 2006-08-30
ATE430262T1 (en) 2009-05-15
KR20060040709A (en) 2006-05-10
EP1649169B1 (en) 2007-09-05
DE502004009441D1 (en) 2009-06-10
ES2293285T3 (en) 2008-03-16
CN100434720C (en) 2008-11-19
KR100776476B1 (en) 2007-11-16
DE502004004892D1 (en) 2007-10-18
DE502004009289D1 (en) 2009-05-14
ES2323277T3 (en) 2009-07-10
ATE427429T1 (en) 2009-04-15
EP1649169A1 (en) 2006-04-26
EP1777416B1 (en) 2009-04-29
EP1777416A1 (en) 2007-04-25
ATE427428T1 (en) 2009-04-15
DE502004009291D1 (en) 2009-05-14
ATE372464T1 (en) 2007-09-15
SI1649169T1 (en) 2008-02-29
US20060251513A1 (en) 2006-11-09
WO2005015023A1 (en) 2005-02-17
DE10352487A1 (en) 2005-02-10
ES2324177T3 (en) 2009-07-31
PL1649169T3 (en) 2008-01-31

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