EP1148248B1 - Pump housing - Google Patents

Pump housing Download PDF

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Publication number
EP1148248B1
EP1148248B1 EP01109509A EP01109509A EP1148248B1 EP 1148248 B1 EP1148248 B1 EP 1148248B1 EP 01109509 A EP01109509 A EP 01109509A EP 01109509 A EP01109509 A EP 01109509A EP 1148248 B1 EP1148248 B1 EP 1148248B1
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EP
European Patent Office
Prior art keywords
pump
pump housing
housing part
bearing
shaped
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01109509A
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German (de)
French (fr)
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EP1148248A2 (en
EP1148248A3 (en
Inventor
Ulrich Kühn
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Appliances Components Cos SpA
Original Assignee
APPLIANCES COMPONENTS COMPANIE
Appliances Components Cos SpA
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Publication of EP1148248A2 publication Critical patent/EP1148248A2/en
Publication of EP1148248A3 publication Critical patent/EP1148248A3/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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/086—Sealings 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
    • 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
    • F04D29/60—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 relates to a pump, in particular a circulating pump for household appliances such as dishwashers or similar machines specified in the preamble of claim 1.
  • a pump in particular a circulating pump for household appliances such as dishwashers or similar machines specified in the preamble of claim 1.
  • the pump housing is attached to the motor housing.
  • This pump housing is cup-shaped, it is placed directly on the motor housing.
  • a pump housing lower part which seals the pump housing to the drive motor in a fluid-tight manner is not provided.
  • a pump housing lower part is formed which carries seals.
  • the seal carrier should be suitable for this document to the fact that the housing is supported on this. This has the consequence that the seal carrier has a plastic fixed configuration so that it can support forces.
  • the present invention has for its object to reduce the manufacturing and assembly costs for a pump, in particular for a circulating pump in household appliances with high custom adaptability. Also, the life of the pump through a better cooling of the drive motor can be increased. This object is achieved by the features characterized in claim 1.
  • the pump housing base does not have to be rigidly ribbed, it can be manufactured and assembled more cost-effectively.
  • the pump housing lower part can be supported due to its both on the outer edge and centrally on the pump-side end shield of the motor housing.
  • the elastic design of the pump housing lower part is further facilitated by the fact that the sealing ring, which is arranged sealingly between the pump housing upper part and the pump housing lower part, is acted upon in the radial direction.
  • both the assembly of the pump is simplified and achieved a relief of the locking means.
  • the latching hook and locking lugs can be made weaker. Also, a stiffening of the pump housing shell is not required.
  • the further embodiment of the pump according to claim 7 allows a good efficiency of the pump.
  • the pump is described in particular as a circulating pump for household appliances such as dishwashers or similar machines.
  • the FIG. 1 shows a pump 1, the pump housing 3 is flanged to the motor housing 5 of a drive motor 7.
  • the pump housing 3 consists of a cup-shaped pump housing upper part 9, which carries both an axial intake 11 and a tangentially directed discharge nozzle 13, and a pump housing 3 to the drive motor 7 towards liquid-tight, designed as a seal carrier pump housing lower part 15.
  • This pump housing part 15 is on the pump side End plate 17 of the motor housing 5 attached.
  • a pump impeller 19 with different height wings 21 for changing the width of the pump impeller 19 and the pump power used wherein the distance s between the junction 23 of the intake 11 into the pump interior 25 facing wing edges 27 of the pump impeller 19 and the mouth 23 surrounding peripheral surface 29 of the pump housing 3 remains constant.
  • the pump impeller 19 consists of a closed circular disc 31, which on one end face 33, the fixed, blade-shaped wings 21 and on the other end face 35 a projecting hub 37 with a blind hole 39 for securing the pump impeller 19 on the projecting into the pump interior 25 free End 41 of the drive shaft 43 of the drive motor 7 has.
  • an insert nut 45 is pressed into the blind hole 39, which is fixedly screwed onto a thread 47 at the free end 41 of the drive shaft 43.
  • the insert nut 45 is provided with a stop flange 51 which bears firmly against the end face 53 of the hub 37.
  • the end face 53 has an annular recess 52 for the stop flange 51.
  • the pump housing lower part 15 is formed so elastically that it after flanging on the pump side on the pump-side end plate 17 is supported both in the area of the drive shaft 43 and on the outer peripheral edge 55 on the pump-side end plate 17.
  • the pump housing lower part 15 has an annular abutment surface 57 for a plurality of support domes 61 arranged at a spacing on the end face 59 in the circumferential direction, which are fastened in the region of the outer edge 63 of the pump-side end shield 17.
  • the pump housing lower part 15 is provided with a concentric with the contact surface 57 arranged bearing pin 65 whose free end 67 is mounted in a bearing recess 69 in the end face 71 of the bearing plate 17.
  • the bearing pin 65 on the pump housing lower part 15 is provided by the pump interior 25 with a cup-shaped recess 73, in the bottom surface 75, a through hole 77 for the drive shaft 43 of the drive motor 7 is arranged.
  • a sliding seal 79 which is arranged coaxially to the drive shaft 43 on the bottom surface 81 of the recess 73, and by a cylindrical seal member 83, which is between the mechanical seal 79 and the stop flange 51st of the Insert nut 45 is fixedly mounted on the drive shaft 43 prevents.
  • the pump housing upper part 9 and the pump housing lower part 15 are rendered liquid-tight, characterized in that the opening edge 85 of the pump housing upper part 9 has an annular edge recess 87 into which a cylindrical bearing flange 89 of the pump housing base 15 is inserted, wherein in the outer peripheral surface 91 of the peripheral recess 87, a sealing ring 93 supported supporting is.
  • this sealing ring 93 is supported radially on its inner peripheral side 95 on a circumferential surface 97 which is smaller in diameter and stepped in front of the cylindrical bearing flange 89 of the pump housing lower part 15. Due to this radial support, a stiffening of the pump housing lower part 15 in the longitudinal direction of the drive shaft 43 is unnecessary. This also simplifies the assembly of the pump housing 3 on the motor housing 5. Furthermore, the latching means for connecting the pump housing 3 to the motor housing 5 are relieved by the radial support of the sealing ring 93.
  • a secure locking of the pump housing 3 with the motor housing 5 is achieved in that the edges of the pump housing upper part 9 and the motor housing. 5 associated locking cam 101, 103 have, which interlock by rotation against each other in the manner of a bayonet closure.
  • an air gap 55 is formed by the supporting dome 61 between the pump-side end plate 17 and the pump housing lower part 15. This air gap 55 is further increased by an annular recess 105 between the abutment surfaces 57 and the bearing pin 67 of the pump housing lower part 15, which adjoins the cylindrical air gap 107 between the support domes 61.
  • the transition of the inner peripheral surface 109 of the cup-shaped pump housing upper part 9 to the pump outlet channel is made sharp-edged.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Reciprocating Pumps (AREA)

Abstract

The pump housing is fastened to a drive motor housing, and has a suction socket opening into it. The pump housing consists of a pot-shaped upper section (9) carrying the axial suction socket (11) and s pressure socket (13) extending from it, and a lower section (15). The lower housing section seals the pump housing fluid-proof towards the drive motor (7), and acts as seal carrier. It supports itself elastically on the A-sided bearing shield (17) of the motor housing (5).

Description

Die Erfindung betrifft eine Pumpe, insbesondere eine Umwälzpumpe für Haushaltsmaschinen wie Geschirrspülmaschinen oder ähnliche Maschinen der im Oberbegriff des Patentanspruchs 1 angegebenen Art.The invention relates to a pump, in particular a circulating pump for household appliances such as dishwashers or similar machines specified in the preamble of claim 1. Art.

Es ist bei als Kreiselpumpe ausgebildeten Flüssigkeitspumpen für Geschirrspülmaschinen ganz allgemein bekannt, ein Schaufelrad zu verwenden, das auf einer Kreisscheibe Schaufeln trägt, auf die von der Gegenseite her eine Ringscheibe mit zentraler Öffnung für das Zuströmen von Spülflüssigkeit nachträglich aufgesetzt und fest damit verbunden wird. Die Einzelteile sind dabei aus Kunststoff gefertigt. Im Betrieb zeigt es sich, daß so hergestellte Pumpenlaufräder bei den im Betrieb auftretenden Förderdrücken und Stoßbelastungen durch schwallweise zuströmende Spülflüssigkeit so stark belastet werden, daß sie im Laufe der Betriebsdauer Verformungen erfahren und insbesondere einen Taumelschlag erleiden. Auch bei der Herstellung ergeben sich bereits hinsichtlich der Maßhaltigkeit Qualitätsmängel. Zudem ist die Produktion eines so aufgebauten Flügelrades hinsichtlich der erforderlichen Werkzeuge und der Montage aufwendig.It is generally known in the case of liquid pumps for dishwashers designed as a centrifugal pump to use a paddle wheel which carries blades on a circular disc, on which an annular disc with a central opening for the inflow of rinsing fluid is subsequently placed and fixedly connected to it from the opposite side. The items are made of plastic. In operation, it turns out that thus produced pump impellers are so heavily loaded at the occurring during operation delivery pressures and shock loads by surge inflowing rinsing fluid that they undergo deformations in the course of service life and in particular suffer a wobble. Also in the production already arise in terms of Dimensional accuracy Quality defects. In addition, the production of a so constructed impeller in terms of the necessary tools and assembly is expensive.

In der DE 92 10 400.2 ist das Pumpengehäuse am Motorgehäuse befestigt. Dieses Pumpengehäuse ist topfförmig ausgebildet, es ist direkt auf das Motorgehäuse aufgesetzt. Ein das Pumpengehäuse zum Antriebsmotor hin flüssigkeitsdicht abschließendes Pumpengehäuseunterteil ist dagegen nicht vorgesehen. In der DE 19 59 087 A ist ein Pumpengehäuseunterteil ausgebildet, das Dichtungen trägt. Der Dichtungsträger soll nach dieser Druckschrift dazu geeignet sein, daß sich das Gehäuse auf diesem abstützt. Das hat zur Folge, daß der Dichtungsträger eine plastische feste Ausgestaltung aufweist, damit er Stützkräfte aufnehmen kann.In the DE 92 10 400.2 the pump housing is attached to the motor housing. This pump housing is cup-shaped, it is placed directly on the motor housing. On the other hand, a pump housing lower part which seals the pump housing to the drive motor in a fluid-tight manner is not provided. In the DE 19 59 087 A a pump housing lower part is formed which carries seals. The seal carrier should be suitable for this document to the fact that the housing is supported on this. This has the consequence that the seal carrier has a plastic fixed configuration so that it can support forces.

In der DE 197 18 027 A1 ist noch eine Synchronpumpe gezeigt.In the DE 197 18 027 A1 is still a synchronous pump shown.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, den Fertigungs- und Montageaufwand für eine Pumpe, insbesondere für eine Umwälzpumpe in Haushaltsmaschinen bei hoher kundenspezifischer Anpassungsfähigkeit zu vermindern. Auch soll die Lebensdauer der Pumpe durch eine bessere Kühlung des Antriebsmotors erhöht werden. Diese Aufgabe wird durch die im Patentanspruch 1 gekennzeichneten Merkmale gelöst.The present invention has for its object to reduce the manufacturing and assembly costs for a pump, in particular for a circulating pump in household appliances with high custom adaptability. Also, the life of the pump through a better cooling of the drive motor can be increased. This object is achieved by the features characterized in claim 1.

Da das Pumpengehäuseunterteil nicht steif verrippt werden muß, kann es kostengünstiger hergestellt und montiert werden. Das Pumpengehäuseunterteil kann aufgrund seiner sowohl am Außenrand als auch mittig an dem pumpenseitigen Lagerschild des Motorgehäuses abgestützt werden.Since the pump housing base does not have to be rigidly ribbed, it can be manufactured and assembled more cost-effectively. The pump housing lower part can be supported due to its both on the outer edge and centrally on the pump-side end shield of the motor housing.

Die elastische Ausbildung des Pumpengehäuseunterteiles wird weiterhin dadurch begünstigt, daß der Dichtungsring, der zwischen den Pumpengehäuseoberteil und dem Pumpengehäuseunterteil dichtend angeordnet ist, in radialer Richtung beaufschlagt wird. Hierdurch wird sowohl die Montage der Pumpe vereinfacht als auch eine Entlastung der Rastmittel erzielt. Die Rasthaken und Rastnasen können schwächer ausgebildet werden. Auch ist eine Versteifung des Pumpengehäuseoberteiles nicht erforderlich.The elastic design of the pump housing lower part is further facilitated by the fact that the sealing ring, which is arranged sealingly between the pump housing upper part and the pump housing lower part, is acted upon in the radial direction. As a result, both the assembly of the pump is simplified and achieved a relief of the locking means. The latching hook and locking lugs can be made weaker. Also, a stiffening of the pump housing shell is not required.

Durch die vorteilhafte Ausbildung des Erfindungsgegenstandes nach den Patentansprüchen 3 und 4 wird eine bessere Kühlung des Antriebsmotors ermöglicht, was sich auf eine Erhöhung der Lebensdauer der Pumpe positiv auswirkt.The advantageous embodiment of the subject invention according to claims 3 and 4, a better cooling of the drive motor allows, which has a positive effect on increasing the life of the pump.

Die weitere Ausbildung der Pumpe nach Patentanspruch 7 ermöglicht einen guten Wirkungsgrad der Pumpe.The further embodiment of the pump according to claim 7 allows a good efficiency of the pump.

Weitere vorteilhafte Ausgestaltungen des Erfindungsgegenstandes sind den weiteren Unteransprüchen und der folgenden Beschreibung zu entnehmen.Further advantageous embodiments of the subject invention are given in the further subclaims and the following description.

Die Erfindung wird im folgenden anhand eines Ausführungsbeispieles in Form einer Umwälzpumpe für Geschirrspülmaschinen näher beschrieben.The invention will be described in more detail below with reference to an embodiment in the form of a circulating pump for dishwashers.

Es zeigen:

Fig. 1:
eine Umwälzpumpe in schaubildlicher Darstellung;
Fig. 2:
die Umwälzpumpe gemäß Figur 1 im Längsschnitt,
Fig. 3:
eine Einzelheit aus Figur 2 mit einer Breite b4 des Pumpenlaufrades,
Fig. 4:
eine Einzelheit aus Figur 2 mit einer Breite b1 des Pumpenlaufrades,
Fig. 5:
eine Innenansicht des Pumpengehäuseoberteiles und
Fig. 6:
Pumpenkennlinien mit unterschiedlich breiten Pumpenlaufrädern.
Show it:
Fig. 1:
a circulation pump in a diagrammatic representation;
Fig. 2:
according to the circulation pump FIG. 1 in longitudinal section,
3:
a detail FIG. 2 with a width b4 of the pump impeller,
4:
a detail FIG. 2 with a width b1 of the pump impeller,
Fig. 5:
an interior view of the pump housing shell and
Fig. 6:
Pump characteristics with pump impellers of different widths.

Die Pumpe wird insbesondere als Umwälzpumpe für Haushaltshaltsmaschinen wie Geschirrspülmaschinen oder ähnliche Maschinen beschrieben. Die Figur 1 zeigt eine Pumpe 1, deren Pumpengehäuse 3 an dem Motorgehäuse 5 eines Antriebsmotors 7 angeflanscht ist. Das Pumpengehäuse 3 besteht aus einem topfförmigen Pumpengehäuseoberteil 9, das sowohl einen axialen Ansaugstutzen 11 als auch einen tangential gerichteten Druckstutzen 13 trägt, und einem das Pumpengehäuse 3 zum Antriebsmotor 7 hin flüssigkeitsdicht abschließenden, als Dichtungsträger ausgebildeten Pumpengehäuseunterteil 15. Dieses Pumpengehäuseunterteil 15 ist an dem pumpenseitigen Lagerschild 17 des Motorgehäuses 5 befestigt.The pump is described in particular as a circulating pump for household appliances such as dishwashers or similar machines. The FIG. 1 shows a pump 1, the pump housing 3 is flanged to the motor housing 5 of a drive motor 7. The pump housing 3 consists of a cup-shaped pump housing upper part 9, which carries both an axial intake 11 and a tangentially directed discharge nozzle 13, and a pump housing 3 to the drive motor 7 towards liquid-tight, designed as a seal carrier pump housing lower part 15. This pump housing part 15 is on the pump side End plate 17 of the motor housing 5 attached.

In das Pumpengehäuse 3 ist gemäß Figur 2 ein Pumpenlaufrad 19 mit unterschiedlich hohen Flügeln 21 zur Veränderung der Breite des Pumpenlaufrades 19 bzw. der Pumpenleistung einsetzbar, wobei der Abstand s zwischen den der Einmündung 23 des Ansaugstutzens 11 in den Pumpeninnenraum 25 zugewandten Flügelkanten 27 des Pumpenlaufrades 19 und der die Einmündung 23 umgebenden Umfangsfläche 29 des Pumpengehäuses 3 konstant bleibt. Durch das Einsetzen von unterschiedlich breiten Pumpenlaufrädern 19 wird die Pumpenkennlinie ohne Änderung der Charakteristik verschoben. Hierdurch läßt sich die Pumpe an verschiedene Geschirrspülmaschinen mit unterschiedlichen Anforderungen an das Druck/Volumenstromverhältnis nur durch das Austauschen des Pumpenlaufrades 19 mit unterschiedlicher Breite auf einfachste Weise anpassen. Da außer dem Pumpenlaufrad 19 alle anderen Teile der Pumpe 1 gleich sind, werden die Entwicklungszeiten gekürzt und damit die Entwicklungskosten stark reduziert.In the pump housing 3 is according to FIG. 2 a pump impeller 19 with different height wings 21 for changing the width of the pump impeller 19 and the pump power used, wherein the distance s between the junction 23 of the intake 11 into the pump interior 25 facing wing edges 27 of the pump impeller 19 and the mouth 23 surrounding peripheral surface 29 of the pump housing 3 remains constant. By inserting different widths pump impellers 19, the pump characteristic is shifted without changing the characteristic. This leaves the pump to different dishwashers with different pressure / flow ratio requirements only by replacing the pump impeller 19 with different width in the simplest way adapt. Since all other parts of the pump 1 are the same except for the pump impeller 19, the development times are shortened and thus the development costs are greatly reduced.

Das Pumpenlaufrad 19 besteht aus einer geschlossenen Kreisscheibe 31, welche auf der einen Stirnfläche 33 die fest angeordneten, schaufelförmigen Flügel 21 und auf der anderen Stirnfläche 35 eine vorstehende Nabe 37 mit einem Sackloch 39 zum Befestigen des Pumpenlaufrades 19 auf dem in den Pumpeninnenraum 25 ragenden freien Ende 41 der Antriebswelle 43 des Antriebsmotors 7 aufweist. Vorteilhaft ist in dem Sackloch 39 eine Einsatzmutter 45 eingepreßt, die auf ein Gewinde 47 an den freiem Ende 41 der Antriebswelle 43 fest aufschraubbar ist. Die Einsatzmutter 45 ist mit einem Anschlagflansch 51 versehen, welcher an der Stirnfläche 53 der Nabe 37 fest anliegt. Insbesondere weist die Stirnfläche 53 eine ringförmige Vertiefung 52 für den Anschlagflansch 51 auf.The pump impeller 19 consists of a closed circular disc 31, which on one end face 33, the fixed, blade-shaped wings 21 and on the other end face 35 a projecting hub 37 with a blind hole 39 for securing the pump impeller 19 on the projecting into the pump interior 25 free End 41 of the drive shaft 43 of the drive motor 7 has. Advantageously, an insert nut 45 is pressed into the blind hole 39, which is fixedly screwed onto a thread 47 at the free end 41 of the drive shaft 43. The insert nut 45 is provided with a stop flange 51 which bears firmly against the end face 53 of the hub 37. In particular, the end face 53 has an annular recess 52 for the stop flange 51.

Das Pumpengehäuseunterteil 15 ist derart elastisch ausgebildet, daß es sich nach dem Anflanschen an dem pumpenseitigen an dem pumpenseitigen Lagerschild 17 sowohl im Bereich der Antriebswelle 43 als auch am äußeren Umfangsrand 55 an dem pumpenseitigen Lagerschild 17 abstützt. Insbesondere weist das Pumpengehäuseunterteil 15 eine ringförmige Anlagefläche 57 für mehrere an der Stirnseite 59 in Umfangsrichtung beabstandet angeordnete Stützdome 61 auf, welche im Bereich des Außenrandes 63 des pumpenseitigen Lagerschildes 17 befestigt sind. Außerdem ist das Pumpengehäuseunterteil 15 mit einem konzentrisch zu der Anlagefläche 57 angeordneten Lagerzapfen 65 versehen, dessen freies Ende 67 in einer Lagerausnehmung 69 in der Stirnfläche 71 des Lagerschildes 17 gelagert ist.The pump housing lower part 15 is formed so elastically that it after flanging on the pump side on the pump-side end plate 17 is supported both in the area of the drive shaft 43 and on the outer peripheral edge 55 on the pump-side end plate 17. In particular, the pump housing lower part 15 has an annular abutment surface 57 for a plurality of support domes 61 arranged at a spacing on the end face 59 in the circumferential direction, which are fastened in the region of the outer edge 63 of the pump-side end shield 17. In addition, the pump housing lower part 15 is provided with a concentric with the contact surface 57 arranged bearing pin 65 whose free end 67 is mounted in a bearing recess 69 in the end face 71 of the bearing plate 17.

Der Lagerzapfen 65 an dem Pumpengehäuseunterteil 15 ist von dem Pumpeninnenraum 25 mit einer topfförmigen Vertiefung 73 versehen, in der Bodenfläche 75 eine Durchgangsbohrung 77 für die Antriebswelle 43 des Antriebsmotors 7 angeordnet ist.The bearing pin 65 on the pump housing lower part 15 is provided by the pump interior 25 with a cup-shaped recess 73, in the bottom surface 75, a through hole 77 for the drive shaft 43 of the drive motor 7 is arranged.

Ein Eindringen von Wasser aus dem Pumpeninnenraum 25 zu dem Antriebsmotor 7 wird durch eine Gleitdichtung 79, die koaxial zu der Antriebswelle 43 auf der Bodenfläche 81 der Vertiefung 73 angeordnet ist, und durch ein zylinderförmiges Dichtungsteil 83, das zwischen der Gleitringdichtung 79 und dem Anschlagflansch 51 der Einsatzmutter 45 auf der Antriebswelle 43 fest gelagert ist, verhindert.Ingress of water from the pump interior 25 to the drive motor 7 is by a sliding seal 79, which is arranged coaxially to the drive shaft 43 on the bottom surface 81 of the recess 73, and by a cylindrical seal member 83, which is between the mechanical seal 79 and the stop flange 51st of the Insert nut 45 is fixedly mounted on the drive shaft 43 prevents.

Das Pumpengehäuseoberteil 9 und das Pumpengehäuseunterteil 15 werden dadurch flüssigkeitsdicht gemacht, daß der Öffnungsrand 85 des Pumpengehäuseoberteiles 9 eine ringförmige Randvertiefung 87 aufweist, in die ein zylindrischer Lagerflansch 89 des Pumpengehäuseunterteils 15 einsetzbar ist, wobei in der Außenumfangsfläche 91 der Randvertiefung 87 ein Dichtungsring 93 abstützend gelagert ist. Dieser Dichtungsring 93 stützt sich andererseits auf seiner Innenumfangsseite 95 auf einer vor dem zylindrischen Lagerflansch 89 des Pumpengehäuseunterteiles 15 angeordneten, im Durchmesser verkleinerten und abgestuften Mantelfläche 97 radial ab. Durch dieses radiale Abstützen erübrigt sich eine Versteifung des Pumpengehäuseunterteiles 15 in Längsrichtung der Antriebswelle 43. Auch wird hierdurch die Montage des Pumpengehäuses 3 an dem Motorgehäuse 5 vereinfacht. Weiterhin werden die Rastmittel zum Verbinden des Pumpengehäuses 3 mit dem Motorgehäuse 5 durch die radiale Abstützung des Dichtungsringes 93 entlastet.The pump housing upper part 9 and the pump housing lower part 15 are rendered liquid-tight, characterized in that the opening edge 85 of the pump housing upper part 9 has an annular edge recess 87 into which a cylindrical bearing flange 89 of the pump housing base 15 is inserted, wherein in the outer peripheral surface 91 of the peripheral recess 87, a sealing ring 93 supported supporting is. On the other hand, this sealing ring 93 is supported radially on its inner peripheral side 95 on a circumferential surface 97 which is smaller in diameter and stepped in front of the cylindrical bearing flange 89 of the pump housing lower part 15. Due to this radial support, a stiffening of the pump housing lower part 15 in the longitudinal direction of the drive shaft 43 is unnecessary. This also simplifies the assembly of the pump housing 3 on the motor housing 5. Furthermore, the latching means for connecting the pump housing 3 to the motor housing 5 are relieved by the radial support of the sealing ring 93.

Eine sichere Verrastung des Pumpengehäuses 3 mit dem Motorgehäuse 5 wird dadurch erzielt, daß die Ränder des Pumpengehäuseoberteiles 9 und des Motorgehäuses 5 zugeordnete Verschlußnocken 101, 103 besitzen, die durch Drehung gegeneinander nach Arte eines Bajonettverschlusses ineinander greifen.A secure locking of the pump housing 3 with the motor housing 5 is achieved in that the edges of the pump housing upper part 9 and the motor housing. 5 associated locking cam 101, 103 have, which interlock by rotation against each other in the manner of a bayonet closure.

Eine gute Kühlung und damit eine längere Lebensdauer des Antriebsmotors wird dadurch erzielt, daß ein Luftzwischenraum 55 durch die Stützdome 61 zwischen dem pumpenseitigen Lagerschild 17 und dem Pumpengehäuseunterteil 15 gebildet wird. Dieser Luftzwischenraum 55 wird noch durch eine ringförmige Vertiefung 105 zwischen den Anschlagflächen 57 und dem Lagerzapfen 67 des Pumpengehäuseunterteiles 15 vergrößert, welche sich an den zylinderförmigen Luftspalt 107 zwischen den Stützdomen 61 anschließt.Good cooling and thus a longer life of the drive motor is achieved in that an air gap 55 is formed by the supporting dome 61 between the pump-side end plate 17 and the pump housing lower part 15. This air gap 55 is further increased by an annular recess 105 between the abutment surfaces 57 and the bearing pin 67 of the pump housing lower part 15, which adjoins the cylindrical air gap 107 between the support domes 61.

Vorteilhaft ist der Übergang der Innenumfangsfläche 109 des topfförmigen Pumpengehäuseoberteiles 9 zu dem Pumpenauslaufkanals scharfkantig ausgeführt.Advantageously, the transition of the inner peripheral surface 109 of the cup-shaped pump housing upper part 9 to the pump outlet channel is made sharp-edged.

Claims (7)

  1. A pump, in particular a circulating pump for household machines such as dishwashers, the pump housing of which is fastened on the motor housing of a drive motor and has a hollow cylindrical pump interior for a pump wheel which is equipped with blades, with a suction socket opening into the pump interior on the end face and from which a pressure socket exits, and with the pump housing consisting of a pot-shaped upper pump housing part which carries the axial suction socket and the pressure socket, and of a lower pump housing part, constructed as a seal carrier, sealing the pump housing in a fluid-tight manner with respect to the drive housing, which lower pump housing part rests under elastic deformation on the bearing shield of the motor housing on the pump side,
    characterized in that
    the bearing shield (17) on the pump side has on its end face (59) facing the lower pump housing part (15) a plurality of projecting support domes, spaced apart in peripheral direction, on which the lower pump housing part (15) rests such that an intermediate air space (55) is formed for the ventilation, on the pump side, of the drive motor (7) between its bearing shield (17) on the pump side and the lower pump housing part (15).
  2. The pump according to Claim 1, characterized in that the lower pump housing part (15) is constructed so as to be elastic and has a ring-shaped contact surface (57) for the support domes (61) and a bearing pin (65), arranged concentrically to the contact surface (57), the free end (67) of which bearing pin (65) is mounted in a bearing recess (69) of the end face (71) of the bearing shield (17).
  3. The pump according to Claim 2, characterized in that the intermediate air space (55) is enlarged by a ring-shaped depression (105) between the contact surfaces (57) and the bearing pin (67) of the lower pump housing part (15), which abuts the cylinder-shaped air gap (107) between the support domes (61).
  4. The pump according to Claim 3, characterized in that the bearing pin (65), from the direction of the pump interior (25), has a pot-shaped depression (73), in the base surface (75) of which a through-bore (77) is arranged for the drive shaft (43) of the drive motor (7).
  5. The pump according to any of Claims 1-4, characterized in that the opening rim (85) of the upper pump housing part (9) has a ring-shaped rim depression (87), into which a cylindrical bearing flange (89) is able to be inserted in a sealing manner, and that in the outer peripheral surface (91) of the rim depression (87) a sealing ring (93) is mounted in a supporting manner, which rests radially on the one hand on its inner peripheral side (95) on a reduced and graduated covering surface (97) arranged in front of the cylindrical bearing flange (89) of the lower pump housing part (15).
  6. The pump according to Claim 5, characterized in that the rims of the upper pump housing part (9) and the motor housing (5) have reciprocally associated closure cams (101, 103), which engage into each other by rotation towards each other in the manner of a bayonet closure.
  7. The pump according to any of the preceding claims, characterized in that the transition of the inner peripheral surface (109) of the pot-shaped upper pump housing part (9) to the pump outlet duct (13) is constructed so as to be sharp-edged.
EP01109509A 2000-04-20 2001-04-17 Pump housing Expired - Lifetime EP1148248B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10019819 2000-04-20
DE10019819A DE10019819A1 (en) 2000-04-20 2000-04-20 Pump housing esp. for circulation pump for household machines consists of separate upper and lower sections with intermediate sealing ring loaded in radial direction

Publications (3)

Publication Number Publication Date
EP1148248A2 EP1148248A2 (en) 2001-10-24
EP1148248A3 EP1148248A3 (en) 2003-01-08
EP1148248B1 true EP1148248B1 (en) 2008-12-10

Family

ID=7639603

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01109509A Expired - Lifetime EP1148248B1 (en) 2000-04-20 2001-04-17 Pump housing

Country Status (4)

Country Link
EP (1) EP1148248B1 (en)
AT (1) ATE417204T1 (en)
DE (2) DE10019819A1 (en)
ES (1) ES2319382T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110068847A (en) * 2009-12-16 2011-06-22 보르그워너 인코퍼레이티드 Exhaust-gas turbocharger

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10225258A1 (en) * 2002-06-07 2003-12-24 Fhp Motors Gmbh Electric motor for a liquid pump
DE102005039557A1 (en) * 2005-08-22 2007-03-01 Robert Bosch Gmbh rotary pump
DE102006045797B4 (en) * 2006-09-26 2011-08-25 Hanning Elektro-Werke GmbH & Co. KG, 33813 Pump and assembly process
DE102007045126A1 (en) * 2007-09-20 2009-04-02 Ksb Aktiengesellschaft Main coolant pump
ITPN20070068A1 (en) * 2007-09-25 2009-03-26 Appliances Components Companie "INTEGRATED GROUP OF ELECTRIC MOTORS"
ATE548541T1 (en) * 2009-12-16 2012-03-15 Borgwarner Inc EXHAUST TURBOCHARGER
CN107630820B (en) * 2016-07-19 2020-01-21 青岛海尔洗衣机有限公司 Draining pump and washing machine using same

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6905217U (en) * 1969-02-11 1969-11-20 Licentia Gmbh CENTRIFUGAL PUMP FOR WASHING OR DISHWASHING MACHINES
DE1959087A1 (en) * 1969-11-25 1971-05-27 Hanning Elektro Werke Housing for motor pumps
FR2247114A5 (en) * 1973-10-05 1975-05-02 Thomson Brandt Electric motor-centrifugal pump combination - has impeller with extending shaft in material resistant to line fluid corrosion
ES2019491A6 (en) * 1989-08-04 1991-06-16 Fagor S Coop Ltda Household appliance pump lost motion drive, seal and bearing arrangement
DE9210400U1 (en) * 1992-08-04 1993-09-02 Hanning Elektro-Werke GmbH & Co, 33813 Oerlinghausen Circulation or drainage pump driven by an electric motor for water-bearing household machines
DE19718027C5 (en) * 1997-04-29 2005-07-21 Miele & Cie. Kg Synchronous pump, in particular drain pump for washing machines and dishwashers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110068847A (en) * 2009-12-16 2011-06-22 보르그워너 인코퍼레이티드 Exhaust-gas turbocharger

Also Published As

Publication number Publication date
DE10019819A1 (en) 2001-10-31
EP1148248A2 (en) 2001-10-24
ATE417204T1 (en) 2008-12-15
ES2319382T3 (en) 2009-05-07
EP1148248A3 (en) 2003-01-08
DE50114556D1 (en) 2009-01-22

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