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EP1913262B1 - Pump body, pump and a water supply household appliance - Google Patents

Pump body, pump and a water supply household appliance Download PDF

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Publication number
EP1913262B1
EP1913262B1 EP06792467.0A EP06792467A EP1913262B1 EP 1913262 B1 EP1913262 B1 EP 1913262B1 EP 06792467 A EP06792467 A EP 06792467A EP 1913262 B1 EP1913262 B1 EP 1913262B1
Authority
EP
European Patent Office
Prior art keywords
support arm
pump
pump housing
seat
front edge
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.)
Not-in-force
Application number
EP06792467.0A
Other languages
German (de)
French (fr)
Other versions
EP1913262A1 (en
Inventor
Michal Kalavsky
Karlheinz Rehm
Bruno Reiter
Michael Rosenbauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL06792467T priority Critical patent/PL1913262T3/en
Publication of EP1913262A1 publication Critical patent/EP1913262A1/en
Application granted granted Critical
Publication of EP1913262B1 publication Critical patent/EP1913262B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • 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
    • F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
    • 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
    • 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
    • F04D29/043—Shafts
    • 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
    • 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

Definitions

  • the present invention relates to a pump housing, a pump, in particular a pump for water-conducting household appliances, and a water-conducting household appliance.
  • the axis on which the rotor of the drive motor is mounted held at the front end in a seat which is fixed in the intake manifold of the pump housing via support arms.
  • the support arms extend radially, star-shaped around the seat.
  • the star-shaped arrangement is in a flow of contaminated water.
  • impurities such as food scraps, fabric fibers and other particles can get caught on the support arms, which can lead to a blockage of the cross-section of the intake and ultimately to failure of the pump.
  • Object of the present invention is thus to provide a way by which a damming of impurities in a pump housing can be prevented and yet a reliable fixation of the axis of the drive motor of the pump is realized.
  • a pump housing for a pump with a wet-rotor motor which has a seat on the inlet side for the axis of the wet-rotor motor.
  • the Pump housing is characterized in that the seat is attached to the pump housing only via a single support arm, wherein the lower edge of the support arm is arranged parallel to the inner wall of the intake manifold.
  • the inlet side is the part of the pump housing to which the liquid which is to be conveyed via the pump enters into the pump housing.
  • this part of the pump housing is formed by an intake.
  • the axis which is to be accommodated in the seat of the pump housing represents the rotationally fixed to be supported axis of the motor, on which the rotor is mounted.
  • a rib or a connecting web is referred to, via which the seat for the front end of the axle can be attached to the pump housing.
  • the seat is always referred to below as the seat for receiving the front end of the axle. This seat is designed for non-rotatable mounting of the axle bearing.
  • the seat By attaching the seat to the housing by a single support arm, the engagement surface on which contaminants can be trapped is minimized.
  • the danger of damming-up of impurities in the immediate vicinity of the seat is great.
  • the distance between adjacent support arms is low, so that impurities can easily settle in these spaces.
  • the seat is attached only at one end to the housing, in particular the intake manifold of the pump housing.
  • the support arm may extend from the fastened side in the radial direction of the intake manifold at least to the outer radius of the arranged on the central axis of the seat.
  • the pump housing has an intake and the length of the support arm is greater than the radius of the intake.
  • the length is the dimension of the support arm, which is perpendicular to the center line of the intake.
  • the support arm is arranged in the intake manifold, that this extends vertically with horizontal alignment of the housing. In this direction, the greatest forces occur due to the weight of the engine. If the support arm is also in this direction, shear forces can be avoided.
  • the support arm extends in this embodiment from above to the seat. Thus, acting on the support arm only tensile forces and kinking of the support arm, which can occur in a support arm which extends vertically from below to the seat, is avoided.
  • the seat is spaced from the leading edge of the support arm in the flow direction. This means that the front end or the tip of the seat, the front edge of the support arm is not touched or offset from the leading edge in the flow direction to the rear in the direction of the pump chamber. This offset refers to the relative position of the seat to the leading edge on the centerline or centerline of the intake manifold.
  • the front edge of the support arm is the edge of the support arm, which faces the inlet opening of the intake manifold.
  • the main flow direction of the liquid is the direction from the intake port of the intake port to the pump chamber of the pump casing.
  • the leading edge at which the impurities carried along with the liquid flow first come into contact with the support arm, in this case represents a continuous edge and in particular has no jump or step.
  • This interruption of the leading edge is at a displacement of the seat against the main flow direction, that is at a protrusion of the seat before.
  • the leading edge of the support arm is at an angle of less than 90 ° to the central axis of the pump housing.
  • the central axis of the pump housing is the center line on which the axis of the pump motor is located. This preferably corresponds to the center line or central axis of the intake. Due to the angle between the front edge and the central axis of the support arm is inclined in the main flow direction of the liquid. This increases the self-cleaning effect of the support arm. Since only one support arm is provided and this ends preferably in the region of the seat for the axle, the inclined arrangement is a sliding of impurities on the front edge of the support arm and thus a removal of the contaminants to the free cross section in the intake manifold, not by the Support arm is covered, allows.
  • the angle between the front edge of the support arm and the center axis of the seat is preferably less than 70 °. This angle allows for optimal self-cleaning and yet can provide sufficient support for the seat of the axle. Which will be explained later.
  • the rear edge of the support arm is at the same angle as the leading edge.
  • the width of the support arm is thus substantially constant over its length.
  • the support arm is preferably rounded at the front edge in the lower area. This means that a radius is provided at the front lower corner of the support arm. This can further improve the flow conditions and the sliding of the impurities.
  • a recess may be provided in the back of the support arm.
  • the seat and the support arm can be configured in one piece according to the invention. As a result, the production is simplified and also the grip of the seat further improved.
  • the cross section in which the support arm is mounted preferably represents the intake manifold of the pump housing.
  • This arrangement is advantageous because the intake manifold has a smaller diameter than the adjoining pump chamber.
  • To fix the seat on the center line of the pump housing, which corresponds to the center line of the intake manifold is a small length of the support arm sufficient. When mounted in this area, the length of the support arm can be minimized compared to the attachment to the inner wall of the pump chamber.
  • the support arm is inclined in the direction of flow and has an angle of, for example, 70 ° for self-cleaning purposes, a further advantage results from the fastening of this support arm in the intake manifold with the small length of the support arm to be realized there. Even with a relatively small width of the support arm, which is for example only a small amount greater than the length of the seat, it can still be ensured in this position that the seat lies in the axial direction below the attachment to the intake manifold and so there is no lever arm which could lead to kinking or detachment of the support arm of the housing.
  • the invention relates to a pump, in particular a wet-running pump, which comprises the pump housing according to the invention.
  • the present invention relates to a water-conducting domestic appliance which has at least one pump according to the invention. Especially in household appliances, the occurrence of impurities in the liquid to be transported can not be avoided. Water-conducting household appliances in which the pump according to the invention can be advantageously used, for example, a washing machine, a dishwasher or the like.
  • pump 1 is a pump with integrated, electronically commutated wet rotor motor for a household appliance (not shown). These pumps 1 are usually in the in the FIG. 1 shown horizontal alignment installed and operated in the household appliance.
  • the pump housing 2 is composed of a front housing shell 3 and a pot-shaped plate 4, which are both positively connected to each other.
  • the pump housing 2 of the pump 1 thus forms a one-piece pump chamber 5, which comprises in its interior a rotor 6 with an impeller 7.
  • the impeller 6 may be formed integrally with the rotor 6.
  • the rotor 6 is rotatably mounted on an axis 10 by a front, the impeller 7 facing slide bearing 8 and by a rear, the shield 4 facing, slide bearing 9.
  • the axis 10 is at its front, the impeller 6 associated end 11 in a seat 12 which is fixed by a support arm 13 on the front housing shell 3, and at its rear, the shield 4 facing the end 14 in a holder 15 which in the shield 4 is formed rotatably mounted.
  • the front housing shell 3, the in FIG. 2 have schematically shown shape.
  • this includes an axial intake 17, through which the liquid to be transported can enter the pump chamber 5.
  • the pump chamber 5 connects to the tangentially a nozzle 19, in particular a discharge nozzle, is provided for the liquid outlet from the chamber 5.
  • a support arm 13 is attached to the inner wall 18. This extends in a vertical direction from above beyond the central axis M of the intake manifold 17. At the height of the central axis M of the intake manifold 17, the seat 12 for the axle 10 is held in the support arm 13.
  • the support arm 13 has the shape of a rib and the leading edge 22 and trailing edge 23 of the support arm 13 are substantially parallel.
  • the front edge 22 merges in a radius into a lower edge parallel to the inner wall 18 of the intake stub 17.
  • the upper edge of the support arm 13 is fixed to the inner wall 18 of the intake manifold 17 or integrated in this. From the upper edge of the support arm 13 extends from the inlet opening 24 of the intake manifold 17 inclined toward the pump chamber 5.
  • an angle ⁇ is between the front edge 22 and the center axis M of the intake manifold 17, which corresponds to the central axis of the axis 10.
  • the seat 12 has substantially the shape of a cone, wherein the cone tip is directed to the inlet opening 24 of the intake manifold 17 and on the opposite side, the receiving opening for the axis 10 is provided.
  • the tip of the seat 12 is located at a horizontal distance a to the front edge 22 of the support arm.
  • the seat 12 is integrally formed with the support arm 13, then this can be formed by a thickening of the thickness of the support arm 13 and a receiving opening for the axis 10 introduced into this thickening.
  • the receiving opening of the seat 12 grooves or the like may be provided which ensure the rotationally fixed mounting of the axle 10.

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

Description

Die vorliegende Erfindung betrifft ein Pumpengehäuse, eine Pumpe, insbesondere eine Pumpe für wasserführende Haushaltsgeräte, sowie ein wasserführendes Haushaltsgerät.The present invention relates to a pump housing, a pump, in particular a pump for water-conducting household appliances, and a water-conducting household appliance.

Bei Pumpen, die zur Förderung von Flüssigkeiten eingesetzt werden, ist es notwendig in der Kammer, durch die die Flüssigkeit transportiert wird, ein Flügelrad in eine Rotationsbewegung zu versetzen. Dieses Flügelrad kann durch einen Motor angetrieben werden, dessen Rotor auf einer drehfesten Achse gelagert ist. Um die Achse gegenüber dem Gehäuse fixieren zu können, muss diese an dem dem Flügelrad zugeordneten Ende vor dem Flügelrad gelagert werden. Diese Fixierung beziehungsweise Lagerung erfolgt vorzugsweise in einem axialen Ansaugstutzen des Pumpengehäuses. Ein Beispiel einer solchen Fixierung der Achse eines Pumpenmotors ist in der DE 103 52 487 A1 beschrieben.For pumps used to deliver fluids, it is necessary to rotate the impeller in the chamber through which the fluid is transported. This impeller can be driven by a motor whose rotor is mounted on a rotationally fixed axis. In order to fix the axis relative to the housing, it must be stored at the end associated with the impeller in front of the impeller. This fixation or storage is preferably carried out in an axial intake manifold of the pump housing. An example of such a fixation of the axis of a pump motor is in the DE 103 52 487 A1 described.

Bei diesem Gehäuse wird die Achse, auf der der Rotor des Antriebsmotors gelagert ist, an dem vorderen Ende in einem Sitz gehalten, der in dem Ansaugstutzen des Pumpengehäuses über Tragarme fixiert ist. Die Tragarme erstrecken sich radial, sternförmig um den Sitz.In this case, the axis on which the rotor of the drive motor is mounted, held at the front end in a seat which is fixed in the intake manifold of the pump housing via support arms. The support arms extend radially, star-shaped around the seat.

Bei dem Betrieb der Pumpe befindet sich die sternförmige Anordnung in einer Strömung von verunreinigtem Wasser. Hierbei können Verunreinigungen, wie Essensreste, Stofffasern und andere Partikel an den Tragarmen hängen bleiben, wodurch es zu einer Verstopfung des Querschnitts des Ansaugstutzens und letztendlich zu einem Ausfall der Pumpe kommen kann.During operation of the pump, the star-shaped arrangement is in a flow of contaminated water. In this case, impurities such as food scraps, fabric fibers and other particles can get caught on the support arms, which can lead to a blockage of the cross-section of the intake and ultimately to failure of the pump.

Aus der DE 28 09 973 A1 ist weiter eine Pumpe bekannt mit einem einzigen Tragarm.From the DE 28 09 973 A1 is further known a pump with a single arm.

Aufgabe der vorliegenden Erfindung ist es somit eine Möglichkeit zu schaffen, mit der ein Aufstauen von Verunreinigungen in einem Pumpengehäuse verhindert werden kann und dennoch eine zuverlässige Fixierung der Achse des Antriebsmotors der Pumpe realisiert ist.Object of the present invention is thus to provide a way by which a damming of impurities in a pump housing can be prevented and yet a reliable fixation of the axis of the drive motor of the pump is realized.

Diese Aufgabe wird gemäß einem ersten Aspekt der Erfindung durch ein Pumpengehäuse für eine Pumpe mit einem Nassläufermotor gelöst, das einlassseitig einen Sitz für die Achse des Nassläufermotors aufweist. Das Pumpengehäuse zeichnet sich dadurch aus, dass der Sitz nur über einen einzigen Tragarm an dem Pumpengehäuse befestigt ist, wobei die Unterkante des Tragarms parallel zu der Innenwand des Ansaugstutzens angeordnet ist.This object is achieved according to a first aspect of the invention by a pump housing for a pump with a wet-rotor motor, which has a seat on the inlet side for the axis of the wet-rotor motor. The Pump housing is characterized in that the seat is attached to the pump housing only via a single support arm, wherein the lower edge of the support arm is arranged parallel to the inner wall of the intake manifold.

Mit der Einlassseite wird im Sinne dieser Erfindung der Teil des Pumpengehäuses bezeichnet an dem die Flüssigkeit, die über die Pumpe gefördert werden soll, in das Pumpengehäuse eintritt. Insbesondere wird dieser Teil des Pumpengehäuses durch einen Ansaugstutzen gebildet. Die Achse, die in dem Sitz des Pumpengehäuses aufgenommen werden soll, stellt die drehfest zu lagernde Achse des Motors dar, auf der der Rotor gelagert ist. Als Tragarm wird im Sinne dieser Erfindung eine Rippe oder ein Verbindungssteg bezeichnet, über den der Sitz für das vordere Ende der Achse an dem Pumpengehäuse befestigt werden kann. Als Sitz wird im Folgenden stets der Sitz zur Aufnahme des vorderen Endes der Achse bezeichnet. Dieser Sitz stellt ein zur drehfesten Lagerung der Achse ausgelegtes Lager dar.For the purposes of this invention, the inlet side is the part of the pump housing to which the liquid which is to be conveyed via the pump enters into the pump housing. In particular, this part of the pump housing is formed by an intake. The axis which is to be accommodated in the seat of the pump housing, represents the rotationally fixed to be supported axis of the motor, on which the rotor is mounted. As a support arm for the purposes of this invention, a rib or a connecting web is referred to, via which the seat for the front end of the axle can be attached to the pump housing. The seat is always referred to below as the seat for receiving the front end of the axle. This seat is designed for non-rotatable mounting of the axle bearing.

Indem der Sitz an dem Gehäuse durch einen einzigen Tragarm befestigt wird, wird die Angriffsfläche, an der Verunreinigungen hängen bleiben können minimiert. Zudem ist bei einer sternförmigen Anordnung mehrerer Tragarme zusätzlich im Bereich unmittelbar um den Sitz die Gefahr des Aufstauens von Verunreinigungen groß. Um den Sitz ist der Abstand zwischen benachbarten Tragarmen gering, so dass sich in diesen Zwischenräumen Verunreinigungen leicht absetzen können.By attaching the seat to the housing by a single support arm, the engagement surface on which contaminants can be trapped is minimized. In addition, in the case of a star-shaped arrangement of a plurality of support arms, the danger of damming-up of impurities in the immediate vicinity of the seat is great. Around the seat, the distance between adjacent support arms is low, so that impurities can easily settle in these spaces.

Erfindungsgemäß ist der Sitz nur an einem Ende an dem Gehäuse, insbesondere dem Ansaugstutzen des Pumpengehäuses, befestigt.According to the invention, the seat is attached only at one end to the housing, in particular the intake manifold of the pump housing.

Der Tragarm kann sich von der befestigten Seite in radialer Richtung des Ansaugstutzens mindestens bis zum Außenradius des auf der Mittelachse angeordneten Sitzes erstrecken.The support arm may extend from the fastened side in the radial direction of the intake manifold at least to the outer radius of the arranged on the central axis of the seat.

Erfindungsgemäß weist das Pumpengehäuse einen Ansaugstutzen auf und die Länge des Tragarmes ist größer als der Radius des Ansaugstutzens. Als Länge wird die Abmessung des Tragarmes bezeichnet, die senkrecht zu der Mittellinie des Ansaugstutzens steht. Vorzugsweise entspricht der Betrag um den die Länge des Tragarmes größer als der Radius des Ansaugstutzens ist, mindestens dem Außenradius des Sitzes für die Achse. Hierdurch wird es möglich den Sitz vollständig in den Tragarm aufzunehmen und dadurch die Verbindung zwischen diesen beiden Komponenten noch zu verbessern. Zudem kann die Geometrie der unteren Kante des Tragarmes bei dieser Ausgestaltung dem Erfordernis, dass die Verunreinigungen sich an dieser Kante ablösen sollen, angepasst werden. Entspricht hingegen die Länge des Tragarmes nur dem Radius des Ansaugstutzens, so bestimmt sich die Abgleitfläche für die Verunreinigungen durch den Außendurchmesser des Sitzes, der wiederum von dem Durchmesser der Achse abhängt und daher nur bedingt modifiziert werden kann.According to the invention, the pump housing has an intake and the length of the support arm is greater than the radius of the intake. The length is the dimension of the support arm, which is perpendicular to the center line of the intake. Preferably, the amount by which the length of the support arm is greater than the radius of the intake manifold, at least the outer radius of the seat for the axis. This makes it possible to fully absorb the seat in the support arm and thereby improving the connection between these two components. In addition, the geometry of the lower edge of the support arm in this embodiment, the requirement that the impurities are to replace this edge to be adjusted. Conversely, if the length of the support arm corresponds only to the radius of the intake, then the sliding surface for the impurities determined by the outer diameter of the seat, which in turn depends on the diameter of the axis and therefore can only be modified to a limited extent.

Vorzugsweise ist der Tragarm so in dem Ansaugstutzen angeordnet, dass dieser bei horizontaler Ausrichtung des Gehäuses vertikal verläuft. In dieser Richtung treten durch das Gewicht des Motors die größten Kräfte auf. Liegt der Tragarm ebenfalls in dieser Richtung, so können Scherkräfte vermieden werden. Vorzugsweise erstreckt sich der Tragarm bei dieser Ausgestaltung von oben zu dem Sitz. Somit wirken auf den Tragarm lediglich Zugkräfte und ein Abknicken des Tragarmes, das bei einem Tragarm, der sich vertikal von unten zu dem Sitz erstreckt, auftreten kann, wird vermieden.Preferably, the support arm is arranged in the intake manifold, that this extends vertically with horizontal alignment of the housing. In this direction, the greatest forces occur due to the weight of the engine. If the support arm is also in this direction, shear forces can be avoided. Preferably, the support arm extends in this embodiment from above to the seat. Thus, acting on the support arm only tensile forces and kinking of the support arm, which can occur in a support arm which extends vertically from below to the seat, is avoided.

Gemäß einer Ausführungsform ist der Sitz zu der Vorderkante des Tragarmes in Strömungsrichtung beabstandet. Dies bedeutet, dass das vordere Ende oder die Spitze des Sitzes die Vorderkante des Tragarmes nicht berührt beziehungsweise gegenüber der Vorderkante in Strömungsrichtung nach hinten in Richtung auf die Pumpenkammer versetzt ist. Dieser Versatz bezieht sich auf die relative Lage des Sitzes zu der Vorderkante auf der Mittellinie beziehungsweise Mittelachse des Ansaugstutzens. Als Vorderkante des Tragarmes wird in diesem Zusammenhang die Kante des Tragarmes bezeichnet, die der Einlassöffnung des Ansaugstutzens zugewandt ist. Als Hauptströmungsrichtung der Flüssigkeit wird die Richtung von der Einlassöffnung des Ansaugstutzens zu der Pumpenkammer des Pumpengehäuses bezeichnet.According to one embodiment, the seat is spaced from the leading edge of the support arm in the flow direction. This means that the front end or the tip of the seat, the front edge of the support arm is not touched or offset from the leading edge in the flow direction to the rear in the direction of the pump chamber. This offset refers to the relative position of the seat to the leading edge on the centerline or centerline of the intake manifold. In this context, the front edge of the support arm is the edge of the support arm, which faces the inlet opening of the intake manifold. The main flow direction of the liquid is the direction from the intake port of the intake port to the pump chamber of the pump casing.

Durch den Versatz des Sitzes zu der Vorderkante des Tragarmes ist der Sitz in diesen integriert. Die Vorderkante, an der die mit der Flüssigkeitsströmung mitgetragenen Verunreinigungen zuerst mit dem Tragarm in Berührung kommen, stellt hierbei eine durchgehende Kante dar uns weist insbesondere keinen Sprung beziehungsweise Absatz auf. Diese Unterbrechung der Vorderkante liegt bei einem Versatz des Sitzes entgegen der Hauptströmungsrichtung, das heißt bei einem Hervorstehen des Sitzes, vor. Somit kann die Gefahr des Festsetzens von Verunreinigungen an der Vorderkante gemindert werden.Due to the offset of the seat to the front edge of the support arm of the seat is integrated in this. The leading edge, at which the impurities carried along with the liquid flow first come into contact with the support arm, in this case represents a continuous edge and in particular has no jump or step. This interruption of the leading edge is at a displacement of the seat against the main flow direction, that is at a protrusion of the seat before. Thus, the risk of setting contaminants on the leading edge can be reduced.

Vorzugsweise steht die Vorderkante des Tragarmes zu der Mittelachse des Pumpengehäuses unter einem Winkel von kleiner als 90°. Als Mittelachse des Pumpengehäuses wird die Mittellinie bezeichnet, auf der die Achse des Pumpenmotors liegt. Diese entspricht vorzugsweise der Mittellinie beziehungsweise Mittelachse des Ansaugstutzens. Durch den Winkel zwischen der Vorderkante und der Mittelachse ist der Tragarm in Hauptströmungsrichtung der Flüssigkeit geneigt. Hierdurch verstärkt sich der Selbstreinigungseffekt des Tragarmes. Da nur ein Tragarm vorgesehen ist und dieser vorzugsweise im Bereich des Sitzes für die Achse endet, wird durch die geneigte Anordnung ein Abgleiten von Verunreinigungen an der Vorderkante des Tragarmes und somit ein Abtransport der Verunreinigungen zu dem freien Querschnitt in dem Ansaugstutzen, der nicht durch den Tragarm abgedeckt ist, ermöglicht.Preferably, the leading edge of the support arm is at an angle of less than 90 ° to the central axis of the pump housing. The central axis of the pump housing is the center line on which the axis of the pump motor is located. This preferably corresponds to the center line or central axis of the intake. Due to the angle between the front edge and the central axis of the support arm is inclined in the main flow direction of the liquid. This increases the self-cleaning effect of the support arm. Since only one support arm is provided and this ends preferably in the region of the seat for the axle, the inclined arrangement is a sliding of impurities on the front edge of the support arm and thus a removal of the contaminants to the free cross section in the intake manifold, not by the Support arm is covered, allows.

Der Winkel zwischen der Vorderkante des Tragarmes und der Mittelachse des Sitzes ist vorzugsweise kleiner als 70°. Dieser Winkel erlaubt eine optimale Selbstreinigung und kann dennoch einen ausreichenden Halt für den Sitz der Achse gewähren. Was später genauer erläutert wird.The angle between the front edge of the support arm and the center axis of the seat is preferably less than 70 °. This angle allows for optimal self-cleaning and yet can provide sufficient support for the seat of the axle. Which will be explained later.

Vorzugsweise steht die rückwärtige Kante des Tragarmes unter dem gleichen Winkel, wie die Vorderkante. Die Breite des Tragarmes ist somit über dessen Länge im Wesentlichen gleich bleibend. Der Tragarm ist vorzugsweise an der Vorderkante im unteren Bereich abgerundet. Dies bedeutet, dass an der vorderen unteren Ecke des Tragarmes ein Radius vorgesehen ist. Diese kann die Strömungsbedingungen und das Abgleiten der Verunreinigungen noch weiter verbessern. Für die Aufnahme des Sitzes, sofern dieser als separates Bauteil hergestellt wird, kann in der Rückseite des Tragarmes eine Aussparung vorgesehen sein.Preferably, the rear edge of the support arm is at the same angle as the leading edge. The width of the support arm is thus substantially constant over its length. The support arm is preferably rounded at the front edge in the lower area. This means that a radius is provided at the front lower corner of the support arm. This can further improve the flow conditions and the sliding of the impurities. For receiving the seat, if this is manufactured as a separate component, a recess may be provided in the back of the support arm.

Der Sitz und der Tragarm können erfindungsgemäß einteilig ausgestaltet sein. Hierdurch wird die Herstellung vereinfacht und zudem der Halt des Sitzes weiter verbessert.The seat and the support arm can be configured in one piece according to the invention. As a result, the production is simplified and also the grip of the seat further improved.

Der Querschnitt, in dem der Tragarm befestigt ist, stellt vorzugsweise den Ansaugstutzen des Pumpengehäuses dar. Diese Anordnung ist vorteilhaft, da der Ansaugstutzen einen geringeren Durchmesser als die sich daran anschließende Pumpenkammer aufweist. Zur Fixierung des Sitzes auf der Mittellinie des Pumpengehäuses, die der Mittellinie des Ansaugstutzens entspricht, ist eine geringe Länge des Tragarmes ausreichend. Bei Befestigung in diesem Bereich kann die Länge des Tragarmes im Vergleich zu der Befestigung an der Innenwand der Pumpenkammer minimiert werden.The cross section in which the support arm is mounted, preferably represents the intake manifold of the pump housing. This arrangement is advantageous because the intake manifold has a smaller diameter than the adjoining pump chamber. To fix the seat on the center line of the pump housing, which corresponds to the center line of the intake manifold is a small length of the support arm sufficient. When mounted in this area, the length of the support arm can be minimized compared to the attachment to the inner wall of the pump chamber.

Ist der Tragarm in Strömungsrichtung geneigt und weist zu Selbstreinigungszwecken einen Winkel von beispielsweise 70° auf, so ergibt sich aus der Befestigung dieses Tragarmes in dem Ansaugstutzen mit der dort zu realisierenden geringen Länge des Tragarmes ein weiterer Vorteil. Auch bei einer relativ geringen Breite des Tragarmes, die beispielsweise nur um einen geringen Betrag größer als die Länge des Sitzes ist, kann in dieser Position noch gewährleistet werden, dass der Sitz in axialer Richtung unterhalb der Befestigung an dem Ansaugstutzen liegt und so kein Hebelarm vorliegt, der zu einem Abknicken oder Ablösen des Tragarmes von dem Gehäuse führen könnte.If the support arm is inclined in the direction of flow and has an angle of, for example, 70 ° for self-cleaning purposes, a further advantage results from the fastening of this support arm in the intake manifold with the small length of the support arm to be realized there. Even with a relatively small width of the support arm, which is for example only a small amount greater than the length of the seat, it can still be ensured in this position that the seat lies in the axial direction below the attachment to the intake manifold and so there is no lever arm which could lead to kinking or detachment of the support arm of the housing.

Gemäß einem weiteren Aspekt betrifft die Erfindung eine Pumpe, insbesondere ein Nassläuferpumpe, die das erfindungsgemäße Pumpengehäuse umfasst.According to a further aspect, the invention relates to a pump, in particular a wet-running pump, which comprises the pump housing according to the invention.

Gemäß einem weiteren Aspekt betrifft die vorliegende Erfindung ein wasserführendes Haushaltsgerät, das zumindest eine erfindungsgemäße Pumpe aufweist. Insbesondere bei Haushaltsgeräten kann das Aufkommen von Verunreinigungen in der zu transportierenden Flüssigkeit nicht vermieden werden. Wasserführende Haushaltsgeräte, in denen die erfindungsgemäße Pumpe vorteilhaft eingesetzt werden kann, sind beispielsweise eine Waschmaschine, eine Spülmaschine oder dergleichen.According to a further aspect, the present invention relates to a water-conducting domestic appliance which has at least one pump according to the invention. Especially in household appliances, the occurrence of impurities in the liquid to be transported can not be avoided. Water-conducting household appliances in which the pump according to the invention can be advantageously used, for example, a washing machine, a dishwasher or the like.

Vorteile und Merkmale, die bezüglich des Pumpengehäuses beschrieben werden gelten soweit anwendbar entsprechend für die Pumpe und das Haushaltsgerät und jeweils umgekehrt.Advantages and features that are described with respect to the pump housing apply as appropriate according to the pump and the household appliance and vice versa.

Die vorliegende Erfindung wird im Folgenden anhand der beiliegenden Zeichnungen erneut im Detail erläutert. Es zeigen:

  • Figur 1: einen Längsschnitt durch eine Ausführungsform des erfindungsgemäßen Pumpengehäuses mit Pumpe;
  • Figur 2: eine Vorderansicht einer Ausführungsform einer vorderen Gehäuseschale des erfindungsgemäßen Pumpengehäuses nach Figur 1; und
  • Figur 3: eine Schnittansicht entlang der Schnittlinie A-A durch die Gehäuseschale nach Figur 2.
The present invention will be explained again in detail below with reference to the accompanying drawings. Show it:
  • FIG. 1 a longitudinal section through an embodiment of the pump housing according to the invention with pump;
  • FIG. 2 : A front view of an embodiment of a front housing shell of the pump housing according to the invention FIG. 1 ; and
  • FIG. 3 a sectional view along the section line AA through the housing shell after FIG. 2 ,

Die in Figur 1 gezeigte Pumpe 1 ist eine Pumpe mit integriertem, elektronisch kommutierten Nassläufer-Motor für ein Haushaltsgerät (nicht dargestellt). Diese Pumpen 1 werden in der Regel in der in der Figur 1 gezeigten horizontalen Ausrichtung in das Haushaltsgerät eingebaut und betrieben.In the FIG. 1 shown pump 1 is a pump with integrated, electronically commutated wet rotor motor for a household appliance (not shown). These pumps 1 are usually in the in the FIG. 1 shown horizontal alignment installed and operated in the household appliance.

Das Pumpengehäuse 2 setzt sich aus einer vorderen Gehäuseschale 3 und einem topfförmigen Schild 4 zusammen, die beide miteinander formschlüssig verbunden sind. Das Pumpengehäuse 2 der Pumpe 1 bildet somit eine einteilige Pumpenkammer 5, die in ihrem Inneren einen Rotor 6 mit einem Flügelrad 7 umfasst. Das Flügelrad 6 kann mit dem Rotor 6 einstückig ausgebildet sein.The pump housing 2 is composed of a front housing shell 3 and a pot-shaped plate 4, which are both positively connected to each other. The pump housing 2 of the pump 1 thus forms a one-piece pump chamber 5, which comprises in its interior a rotor 6 with an impeller 7. The impeller 6 may be formed integrally with the rotor 6.

Der Rotor 6 ist durch ein vorderes, dem Flügelrad 7 zugewandten, Gleitlager 8 und durch ein hinteres, dem Schild 4 zugewandten, Gleitlager 9 drehbar auf einer Achse 10 gelagert. Die Achse 10 ist an ihrem vorderen, dem Flügelrad 6 zugeordneten Ende 11 in einem Sitz 12, der durch einen Tragarm 13 an der vorderen Gehäuseschale 3 fixiert ist, und an ihrem hinteren, dem Schild 4 zugewandten Ende 14 in einer Halterung 15, die in dem Schild 4 ausgebildet ist, drehfest gelagert.The rotor 6 is rotatably mounted on an axis 10 by a front, the impeller 7 facing slide bearing 8 and by a rear, the shield 4 facing, slide bearing 9. The axis 10 is at its front, the impeller 6 associated end 11 in a seat 12 which is fixed by a support arm 13 on the front housing shell 3, and at its rear, the shield 4 facing the end 14 in a holder 15 which in the shield 4 is formed rotatably mounted.

Auf dieser Achse 10 läuft der Rotor 6, den von dem Stator 21 umgeben ist. Bei der gezeigten Ausführungsform handelt es sich somit um einen Innenläufermotor. Es ist allerdings auch möglich das erfindungsgemäße Pumpengehäuse für eine Pumpe mit einem Außenläufermotor (nicht dargestellt) zu verwenden.On this axis 10 of the rotor 6, which is surrounded by the stator 21 runs. In the embodiment shown is thus an internal rotor motor. However, it is also possible to use the pump housing according to the invention for a pump with an external rotor motor (not shown).

Die vordere Gehäuseschale 3 kann die in Figur 2 schematisch gezeigte Form aufweisen. Insbesondere umfasst diese einen axialen Ansaugstutzen 17, über den die zu befördernde Flüssigkeit in die Pumpenkammer 5 eintreten kann. An den Ansaugstutzen 17 schließt sich die Pumpenkammer 5 an, an der tangential ein Stutzen 19, insbesondere ein Druckstutzen, für den Flüssigkeitsaustritt aus der Kammer 5 vorgesehen ist.The front housing shell 3, the in FIG. 2 have schematically shown shape. In particular, this includes an axial intake 17, through which the liquid to be transported can enter the pump chamber 5. At the intake 17, the pump chamber 5 connects to the tangentially a nozzle 19, in particular a discharge nozzle, is provided for the liquid outlet from the chamber 5.

In dem Ansaugstutzen 17 ist an dessen Innenwand 18 ein Tragarm 13 befestigt. Dieser erstreckt sich in vertikaler Richtung von oben über die Mittelachse M des Ansaugstutzens 17 hinaus. Auf der Höhe der Mittelachse M des Ansaugstutzens 17 ist in dem Tragarm 13 der Sitz 12 für die Achse 10 gehalten.In the intake manifold 17, a support arm 13 is attached to the inner wall 18. This extends in a vertical direction from above beyond the central axis M of the intake manifold 17. At the height of the central axis M of the intake manifold 17, the seat 12 for the axle 10 is held in the support arm 13.

Aus der Schnittansicht durch vordere Gehäuseschale 3 in Figur 3 lässt sich entnehmen, dass der Tragarm 13 die Form einer Rippe aufweist und die Vorderkante 22 und Hinterkante 23 des Tragarmes 13 im wesentlichen parallel verlaufen. Im unteren Bereich geht die Vorderkante 22 in einem Radius in eine zu der Innenwand 18 des Ansaugstutzens 17 parallele Unterkante über. Die Oberkante des Tragarmes 13 ist an der Innenwand 18 des Ansaugstutzens 17 befestigt oder in diesen integriert. Von der oberen Kante aus erstreckt sich der Tragarm 13 von der Eintrittsöffnung 24 des Ansaugstutzens 17 geneigt in Richtung auf die Pumpenkammer 5. Zwischen der Vorderkante 22 und der Mittelachse M des Ansaugstutzens 17, die der Mittelachse der Achse 10 entspricht, liegt ein Winkel β.From the sectional view through front housing shell 3 in FIG. 3 can be seen that the support arm 13 has the shape of a rib and the leading edge 22 and trailing edge 23 of the support arm 13 are substantially parallel. In the lower region, the front edge 22 merges in a radius into a lower edge parallel to the inner wall 18 of the intake stub 17. The upper edge of the support arm 13 is fixed to the inner wall 18 of the intake manifold 17 or integrated in this. From the upper edge of the support arm 13 extends from the inlet opening 24 of the intake manifold 17 inclined toward the pump chamber 5. Between the front edge 22 and the center axis M of the intake manifold 17, which corresponds to the central axis of the axis 10, is an angle β.

In dem Tragarm 13 ist der Sitz 12 für die Achse 10 integriert beziehungsweise durch diesen gehalten. Der Sitz 12 weist im Wesentlichen die Form eines Konus auf, wobei die Konusspitze zu der Eintrittsöffnung 24 des Ansaugstutzens 17 gerichtet ist und auf der gegenüberliegenden Seite die Aufnahmeöffnung für die Achse 10 vorgesehen ist. Die Spitze des Sitzes 12 liegt in einem horizontalen Abstand a zu der Vorderkante 22 des Tragarmes.In the support arm 13 of the seat 12 is integrated for the axle 10 and held by this. The seat 12 has substantially the shape of a cone, wherein the cone tip is directed to the inlet opening 24 of the intake manifold 17 and on the opposite side, the receiving opening for the axis 10 is provided. The tip of the seat 12 is located at a horizontal distance a to the front edge 22 of the support arm.

Ist der Sitz 12 mit dem Tragarm 13 einteilig ausgestaltet, so kann dieser durch eine Verdickung der Dicke des Tragarmes 13 und eine in diese Verdickung eingebrachte Aufnahmeöffnung für die Achse 10 gebildet werden. In der Aufnahmeöffnung des Sitzes 12 können Rillen oder dergleichen vorgesehen sein, die die drehfeste Lagerung der Achse 10 gewährleisten.If the seat 12 is integrally formed with the support arm 13, then this can be formed by a thickening of the thickness of the support arm 13 and a receiving opening for the axis 10 introduced into this thickening. In the receiving opening of the seat 12 grooves or the like may be provided which ensure the rotationally fixed mounting of the axle 10.

Mit der vorliegenden Erfindung lässt sich auf einfache Weise ein Verstopfen eines Pumpengehäuses einer Flüssigkeitspumpe, insbesondere im Bereich des Ansaugstutzens des Pumpengehäuses verhindern.With the present invention, clogging of a pump housing of a liquid pump, in particular in the region of the intake nozzle of the pump housing, can be prevented in a simple manner.

Claims (11)

  1. Pump housing for a pump (1) with wet running motor, which on its intake side has a seat (12) for the shaft (10) of the wet running motor, wherein the pump housing (2) has an intake flange (17) with an intake opening, wherein the seat (12) is attached via a single support arm (13) to the intake flange (17) only at one end, wherein the length of the support arm (13) is greater than the radius of the intake flange (17), wherein the support arm (13) is embodied in the shape of a rib, which has a front edge (22), a rear edge (23) and a lower edge connecting the front edge (22) and the rear edge (23), wherein the front edge (22) is arranged facing towards the intake opening and the rear edge (23) is arranged behind the front edge (22) in the direction of flow, and wherein the lower edge is arranged on the free end of the support arm, characterised in that the lower edge is arranged in parallel with the inner wall of the intake flange (17).
  2. Pump housing according to claim 1, characterised in that the front edge (22) and rear edge (23) run essentially in parallel.
  3. Pump housing according to one of claims 1 or 2, characterised in that the support arm (13) is arranged in the intake flange (17) so that this arm runs vertically when the housing (2) is oriented horizontally.
  4. Pump housing according to one of claims 1 to 3, characterised in that the seat (12) is spaced away from the front edge (22) of the support arm (13) in the main direction of flow of the fluid to be conveyed by the pump (1).
  5. Pump housing according to one of claims 1 to 4, characterised in that the pump housing (2) has a centre axis (M) and the front edge (22) of the support arm (13) is at an angle (β) of less than 90°, preferably less than 70°, with respect to the centre axis (M).
  6. Pump housing according to one of claims 1 to 5, characterised in that the support arm (13) is rounded off on the front edge (22) in the lower area.
  7. Pump housing according to one of claims 1 to 6, characterised in that the support arm (13) and the seat (12) are designed in one piece.
  8. Pump housing according to one of claims 1 to7, characterised in that the seat (12) is formed by a thickening of the support arm (13) and by a receiving opening for the shaft (10) inserted into the thickened part.
  9. Pump housing according to claim 8, characterised in that ridges are provided in the receiving opening of the seat (12) which guarantee that the shaft (10) is supported in a manner which prevents it rotating.
  10. Pump with wet running motor, characterised in that said pump has a pump housing (2) according to one of claims 1 to 9.
  11. Water supply household appliance, characterised in that this includes a pump (1) according to claim 10.
EP06792467.0A 2005-08-04 2006-06-27 Pump body, pump and a water supply household appliance Not-in-force EP1913262B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06792467T PL1913262T3 (en) 2005-08-04 2006-06-27 Pump body, pump and a water supply household appliance

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005036818.2A DE102005036818B4 (en) 2005-08-04 2005-08-04 Pump housing, pump and water-conducting household appliance
PCT/EP2006/063593 WO2007014807A1 (en) 2005-08-04 2006-06-27 Pump body, pump and a water supply household appliance

Publications (2)

Publication Number Publication Date
EP1913262A1 EP1913262A1 (en) 2008-04-23
EP1913262B1 true EP1913262B1 (en) 2017-04-05

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Application Number Title Priority Date Filing Date
EP06792467.0A Not-in-force EP1913262B1 (en) 2005-08-04 2006-06-27 Pump body, pump and a water supply household appliance

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EP (1) EP1913262B1 (en)
KR (1) KR20080024539A (en)
CN (1) CN101233327A (en)
AU (1) AU2006275015A1 (en)
DE (1) DE102005036818B4 (en)
ES (1) ES2626998T3 (en)
PL (1) PL1913262T3 (en)
WO (1) WO2007014807A1 (en)

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DE102010042491A1 (en) 2010-10-15 2012-05-03 BSH Bosch und Siemens Hausgeräte GmbH Pump device for a domestic appliance, domestic appliance and method for operating a drive motor
DE102010042513A1 (en) 2010-10-15 2012-04-19 BSH Bosch und Siemens Hausgeräte GmbH Pump for a household appliance, household appliance with a pump and method for operating a domestic appliance
DE102011121149A1 (en) * 2011-12-15 2013-06-20 Wilo Se Wet runner pump with prechamber
EP2610500B1 (en) 2011-12-27 2015-09-16 Grundfos Holding A/S Pump power unit
DE102013014140A1 (en) * 2012-12-21 2014-06-26 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Electromotive water pump
CN106762694B (en) * 2016-12-12 2017-09-15 华中科技大学 A kind of miniature hydraulic suspension mechanical pump
DE102018204503A1 (en) * 2018-03-23 2019-09-26 Robert Bosch Gmbh liquid pump
KR102574065B1 (en) * 2023-01-26 2023-09-05 (유)한성산기 Vibration reduction pump

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KR20080024539A (en) 2008-03-18
PL1913262T3 (en) 2017-08-31
ES2626998T3 (en) 2017-07-26
CN101233327A (en) 2008-07-30
EP1913262A1 (en) 2008-04-23
DE102005036818B4 (en) 2015-03-05
AU2006275015A1 (en) 2007-02-08
DE102005036818A1 (en) 2007-02-08
WO2007014807A1 (en) 2007-02-08

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