EP0943809A2 - Centrifugal pump - Google Patents

Centrifugal pump Download PDF

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Publication number
EP0943809A2
EP0943809A2 EP99890088A EP99890088A EP0943809A2 EP 0943809 A2 EP0943809 A2 EP 0943809A2 EP 99890088 A EP99890088 A EP 99890088A EP 99890088 A EP99890088 A EP 99890088A EP 0943809 A2 EP0943809 A2 EP 0943809A2
Authority
EP
European Patent Office
Prior art keywords
bearing bracket
centrifugal pump
housing
housing part
suction
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.)
Granted
Application number
EP99890088A
Other languages
German (de)
French (fr)
Other versions
EP0943809A3 (en
EP0943809B1 (en
Inventor
Siegfried Ing. Heer
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.)
TCG Unitech AG
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TCG Unitech AG
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Publication date
Application filed by TCG Unitech AG filed Critical TCG Unitech AG
Publication of EP0943809A2 publication Critical patent/EP0943809A2/en
Publication of EP0943809A3 publication Critical patent/EP0943809A3/en
Application granted granted Critical
Publication of EP0943809B1 publication Critical patent/EP0943809B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the invention relates to a centrifugal pump with a fixed on a drive shaft Impeller and a multi-part pump housing, which is partly made of plastic, in which a suction chamber arranged on the drive side of the impeller and a spiral one Pressure chamber are formed, one arranged in the area of the suction chamber Bearing bracket made of metallic material, and with the pump housing on the drive side has a suction flange and a housing cover in the area of the pressure chamber.
  • pumps are known from EP 208 074 A, DE 33 16 927 A or DE 43 19 618 A. known, which are partially made of plastic. In general, one is made of metal Housing part, the engine mounting u. Like. Contains a plastic spiral housing attached that surrounds the pump impeller. In this way it is possible to have a certain To achieve weight and cost savings, but such solutions need a relative large installation space. Especially when used for cooling water pumps in motor vehicles however, the installation space is naturally limited.
  • the bearing bracket as mechanical and thermal part subject to higher stress consists of metal, preferably of aluminum, magnesium or an aluminum or a magnesium alloy, whereby the storage heat is dissipated very quickly can be.
  • centrifugal pump ensures that the available space is optimally used. Furthermore, the corresponding Components stressed in an optimal way, according to their respective material. On in this way, considerable material and cost savings can be achieved.
  • the housing cover is made of plastic.
  • a special one Inexpensive and lightweight to build version provides that the Housing cover in one piece with the housing part forming the suction space at least in part is trained. Housing cover and housing part can, for example, by means of a melting process be made.
  • the bearing bracket is in one piece is formed with a drive-side mounting flange on which the Suction chamber is at least partially detachably attached housing part. This means that Possibility to combine different spiral geometries with different bearing brackets.
  • the bearing bracket can therefore also be permanently connected to the housing part.
  • Fig. 1 shows a conventional centrifugal pump 1 with a pump housing 2, which a metallic housing part 3, which the bearing bracket 3a, the suction chamber 4 and forms part of the spiral pressure chamber 5.
  • the suction chamber 4 is around Bearing bracket 3a arranged around.
  • the housing part 3 is on the side of the drive shaft 6 driven impeller 7 completed by a housing cover 8.
  • With reference numbers 9 is a coupling connected to the drive shaft.
  • the drive shaft 6 is mounted on the bearing bracket 3a via slide bearings 6a.
  • the bearing 6a is through a Mechanical seal 6b separated from suction chamber 4.
  • the impeller 7 On the entry side of the impeller 7 is a arranged with the impeller revolving suction mouth 7a, which has a streamlined Cross-sectional adjustment between the suction chamber 4 and the inlet area of the impeller 7 forms.
  • the Metallic housing part 3 is produced as a die-cast part and has a correspondingly large size Wall thicknesses, which has a negative impact on the total pump weight.
  • the centrifugal pump 21 shown in FIGS. 2 and 3 has a pump housing 22 which consists of a combination of several materials.
  • the bearing bracket 23 is designed as a separate, metallic housing part and serves to support the drive shaft 26.
  • the suction chamber 24 and the pressure chamber 25, however, are from one Plastic existing housing part 30 is formed, which with the bearing bracket 23 over Screw connections 31 is connected.
  • a housing cover 28 closes the housing part 30 in the area of the impeller 27, which is also made of plastic.
  • the housing part 30 and the housing cover 28 are connected to one another via screw connections 32.
  • a mounting flange 33 is formed, which on the one hand as a mounting plate for the centrifugal pump 21, and on the other hand for receiving the screw connection 31 for the housing part 30 is used.
  • the drive shaft 26 is on a bearing 26a, for example, a bearing Bearing bracket 23 stored.
  • the metallic bearing bracket 23 can on the one hand the bearing forces of the Take up drive shaft 26 and optimally dissipate the bearing heat.
  • an inlet-side suction mouth of the impeller 27 is designated.
  • a mechanical seal 26b is arranged between the camp 26a and the suction mouth 27a and the suction chamber 24 .
  • a drive unit, not shown, can be connected to the clutch 29 become.
  • the suction flange 24a can also expediently be made in one piece with the housing part 30 and thus be made of plastic.
  • the advantageously produced in the injection molding process Housing part 30 made of plastic is much cheaper to produce than in Fig. 1 apparent, die-cast housing part 3 and beyond also more complicated workpiece geometries of the housing part 30 made of plastic much more reliable be made as of metal.
  • Ryton with a density of approximately 1.98 kg / dm 3 can be used as the plastic material for the housing part 30 and the housing cover 28.
  • the bearing bracket 23 is advantageously made of aluminum or magnesium or one corresponding aluminum or magnesium alloy.
  • the design of the centrifugal pump according to the invention enables a cost reduction of up to about 50% and a weight reduction of up to about 30% compared to conventional ones Centrifugal pumps with a metal housing.

Abstract

The centrifugal pump has a pump wheel (27) on a drive shaft (26) and a multi-part casing (22), partly made of plastic, containing an induction cavity (24) on the drive side of the pump wheel and a spiral compression cavity (25). The metal bearing carrier (23) and plastic part (30) of the casing bound the induction cavity, which is preferably removable from the bearing carrier.

Description

Die Erfindung betrifft eine Kreiselpumpe mit einem auf einer Antriebswelle befestigten Laufrad und einem mehrteiligen Pumpengehäuse, das teilweise aus Kunststoff hergestellt ist, in welchem ein auf der Antriebsseite des Laufrades angeordneter Saugraum und ein spiralförmiger Druckraum ausgebildet sind, wobei ein im Bereich des Saugraumes angeordneter Lagerträger aus metallischem Werkstoff besteht, und wobei das Pumpengehäuse auf der Antriebsseite einen Ansaugflansch und im Bereich des Druckraumes einen Gehäusedeckel aufweist.The invention relates to a centrifugal pump with a fixed on a drive shaft Impeller and a multi-part pump housing, which is partly made of plastic, in which a suction chamber arranged on the drive side of the impeller and a spiral one Pressure chamber are formed, one arranged in the area of the suction chamber Bearing bracket made of metallic material, and with the pump housing on the drive side has a suction flange and a housing cover in the area of the pressure chamber.

Bei konventionellen Kreiselpumpen, insbesondere Wasserpumpen, der eingangs genannten Art werden der Saugraum, zumindest ein Teil des Druckraumes und der Lagerträger für die Antriebswelle aus einem einzigen, metallischen Gehäuseteil gebildet. Derartige Pumpen sind zwar robust, die hohe Dichte des metallischen Pumpengehäuses wirkt sich aber nachteilig auf das Gesamtgewicht der Pumpe aus. Insbesonders, wenn kompliziertere Geometrien des Gehäuses erforderlich sind, ist der Herstellungsaufwand allerdings relativ hoch.In the case of conventional centrifugal pumps, in particular water pumps, of the type mentioned at the beginning Kind are the suction chamber, at least part of the pressure chamber and the bearing bracket for the Drive shaft formed from a single, metallic housing part. Such pumps are Although robust, the high density of the metallic pump housing has an adverse effect the total weight of the pump. Especially when the housing geometry is more complicated are required, however, the manufacturing effort is relatively high.

Weiters sind aus der EP 208 074 A, der DE 33 16 927 A oder der DE 43 19 618 A Pumpen bekannt, die teilweise aus Kunststoff bestehen. Allgemein wird dabei an einen aus Metall hergestellten Gehäuseteil, der Motorlagerung u. dgl. beinhaltet, ein Spiralgehäuse aus Kunststoff aufgesetzt, das das Pumpenlaufrad umgibt. Auf diese Weise ist es zwar möglich eine gewisse Gewichts- und Kosteneinsparung zu erzielen, aber solche Lösungen benötigen einen relativ großen Bauraum. Gerade bei der Anwendung für Kühlwasserpumpen von Kraftfahrzeugen ist jedoch der Bauraum naturgemäß beschränkt.Furthermore, pumps are known from EP 208 074 A, DE 33 16 927 A or DE 43 19 618 A. known, which are partially made of plastic. In general, one is made of metal Housing part, the engine mounting u. Like. Contains a plastic spiral housing attached that surrounds the pump impeller. In this way it is possible to have a certain To achieve weight and cost savings, but such solutions need a relative large installation space. Especially when used for cooling water pumps in motor vehicles however, the installation space is naturally limited.

Es ist die Aufgabe der Erfindung, diese Nachteile zu vermeiden und bei einer Kreiselpumpe der eingangs genannten Art das Gesamtgewicht und den Herstellungsaufwand zu vermindern.It is the object of the invention to avoid these disadvantages and with a centrifugal pump to reduce the total weight and the manufacturing effort of the type mentioned.

Erfindungsgemäß wird dies dadurch erreicht, daß der Saugraum einerseits durch den Lagerträger und andererseits durch einen aus Kunststoff bestehenden und den Lagerträger umgebenden, mit dem Lagerträger vorzugsweise lösbar verbundenen Gehäuseteil begrenzt ist.According to the invention this is achieved in that the suction space on the one hand through the bearing bracket and on the other hand by a plastic, which surrounds the bearing bracket, is preferably detachably connected to the bearing bracket housing part.

Gehäuseteile, welchen geringeren thermischen oder mechanischen Belastungen unterliegen, sind somit aus Kunststoff. Durch die geringe Dichte des Kunststoffes kann das Gesamtgewicht der Pumpe wesentlich reduziert werden. Der Lagerträger als mechanisch und thermisch höher beanspruchter Teil besteht aus Metall, vorzugsweise aus Aluminium, Magnesium bzw. einer Aluminium- oder einer Magnesiumlegierung, wodurch die Lagerwärme sehr rasch abgeführt werden kann. Housing parts, which are subject to lower thermal or mechanical loads, are therefore made of plastic. Due to the low density of the plastic, the total weight the pump can be significantly reduced. The bearing bracket as mechanical and thermal part subject to higher stress consists of metal, preferably of aluminum, magnesium or an aluminum or a magnesium alloy, whereby the storage heat is dissipated very quickly can be.

Durch die besondere Ausbildung der erfindungsgemäßen Kreiselpumpe wird erreicht, daß der zur Verfügung stehende Bauraum optimal ausgenutzt wird. Weiters werden die entsprechenden Bauteile in optimaler Weise, entsprechend ihrem jeweiligen Werkstoff, beansprucht. Auf diese Weise kann eine erhebliche Material- und Kosteneinsparung erzielt werden.The special design of the centrifugal pump according to the invention ensures that the available space is optimally used. Furthermore, the corresponding Components stressed in an optimal way, according to their respective material. On in this way, considerable material and cost savings can be achieved.

Vorzugsweise ist dabei vorgesehen, daß der Gehäusedeckel aus Kunsttoff besteht. Eine besonders kostengünstige und mit geringem Gewicht zu bauende Ausführung sieht vor, daß der Gehäusedeckel einteilig mit dem den Saugraum zumindest zum Teil bildenden Gehäuseteil ausgebildet ist. Gehäusedeckel und Gehäuseteil können dabei beispielsweise mittels Ausschmelzverfahren hergestellt sein.It is preferably provided that the housing cover is made of plastic. A special one Inexpensive and lightweight to build version provides that the Housing cover in one piece with the housing part forming the suction space at least in part is trained. Housing cover and housing part can, for example, by means of a melting process be made.

Eine weitere Gewichtseinsparung ergibt sich, wenn der Ansaugflansch aus Kunststoff besteht und vorzugsweise einteilig mit dem den Saugraum zumindest zum Teil bildenden Gehäuseteil ausgebildet ist.A further weight saving results if the intake flange is made of plastic and preferably in one piece with the housing part forming the suction space at least in part is trained.

In einer besonders bevorzugten Ausführungsvariante ist vorgesehen, daß der Lagerträger einstückig mit einem antriebsseitigen Befestigungsflansch ausgebildet ist, auf welchem der den Saugraum zumindest zum Teil bildende Gehäuseteil lösbar befestigt ist. Dadurch besteht die Möglichkeit, unterschiedliche Spiralgeometrien mit verschiedenen Lagerträgern zu kombinieren. Der Lagerträger kann also auch unlösbar mit dem Gehäuseteil verbunden sein.In a particularly preferred embodiment variant it is provided that the bearing bracket is in one piece is formed with a drive-side mounting flange on which the Suction chamber is at least partially detachably attached housing part. This means that Possibility to combine different spiral geometries with different bearing brackets. The bearing bracket can therefore also be permanently connected to the housing part.

Die Erfindung wird im folgenden anhand der Figuren näher erläutert.The invention is explained in more detail below with reference to the figures.

Es zeigen:

  • Fig. 1 eine konventionelle Kreiselpumpe im Längsschnitt,
  • Fig. 2 eine erfindungsgemäße Kreiselpumpe im Längsschnitt und
  • Fig. 3 eine Draufsicht auf die Kreiselpumpe von der Seite des Befestigungsflansches.
    • Show it:
  • 1 shows a conventional centrifugal pump in longitudinal section,
  • Fig. 2 shows a centrifugal pump according to the invention in longitudinal section and
  • Fig. 3 is a plan view of the centrifugal pump from the side of the mounting flange.

    • Fig. 1 zeigt eine konventionelle Kreiselpumpe 1 mit einem Pumpengehäuse 2, welches aus einem metallischen Gehäuseteil 3 besteht, welcher den Lagerträger 3a, den Saugraum 4 und einen Teil des spiralförmigen Druckraumes 5 ausbildet. Der Saugraum 4 ist dabei um den Lagerträger 3a herum angeordnet. Der Gehäuseteil 3 wird auf der Seite des durch die Antriebswelle 6 angetriebenen Laufrades 7 von einem Gehäusedeckel 8 abgeschlossen. Mit Bezugszeichen 9 ist eine an die Antriebswelle anschließende Kupplung bezeichnet. Die Antriebswelle 6 ist über Gleitlager 6a am Lagerträger 3a gelagert. Das Lager 6a ist durch eine Gleitringdichtung 6b vom Saugraum 4 getrennt. Auf der Eintrittsseite des Laufrades 7 ist ein mit dem Laufrad umlaufender Saugmund 7a angeordnet, welcher eine strömungsgünstige Querschnittsanpassung zwischen Saugraum 4 und Eintrittsbereich des Laufrades 7 bildet. Der metallische Gehäuseteil 3 wird als Druckgußteil hergestellt und weist entsprechend große Wandstärken auf, was sich nachteilig auf das Pumpengesamtgewicht auswirkt. Fig. 1 shows a conventional centrifugal pump 1 with a pump housing 2, which a metallic housing part 3, which the bearing bracket 3a, the suction chamber 4 and forms part of the spiral pressure chamber 5. The suction chamber 4 is around Bearing bracket 3a arranged around. The housing part 3 is on the side of the drive shaft 6 driven impeller 7 completed by a housing cover 8. With reference numbers 9 is a coupling connected to the drive shaft. The drive shaft 6 is mounted on the bearing bracket 3a via slide bearings 6a. The bearing 6a is through a Mechanical seal 6b separated from suction chamber 4. On the entry side of the impeller 7 is a arranged with the impeller revolving suction mouth 7a, which has a streamlined Cross-sectional adjustment between the suction chamber 4 and the inlet area of the impeller 7 forms. Of the Metallic housing part 3 is produced as a die-cast part and has a correspondingly large size Wall thicknesses, which has a negative impact on the total pump weight.

    Die in den Fig. 2 und 3 dargestellte Kreiselpumpe 21 dagegen weist ein Pumpengehäuse 22 auf, welches aus einer Kombination von mehreren Werkstoffen besteht. Der Lagerträger 23 ist dabei als separater, metallischer Gehäuseteil ausgebildet und dient zur Lagerung der Antriebswelle 26. Der Saugraum 24 und der Druckraum 25 dagegen werden von einem aus Kunststoff bestehenden Gehäuseteil 30 gebildet, welcher mit dem Lagerträger 23 über Schraubverbindungen 31 verbunden ist. An den Gehäuseteil 30 schließt ein Gehäusedeckel 28 im Bereich des Laufrades 27 an, welcher ebenfalls aus Kunststoffbesteht. Der Gehäuseteil 30 und der Gehäusedeckel 28 sind über Schraubverbindungen 32 miteinander verbunden.In contrast, the centrifugal pump 21 shown in FIGS. 2 and 3 has a pump housing 22 which consists of a combination of several materials. The bearing bracket 23 is designed as a separate, metallic housing part and serves to support the drive shaft 26. The suction chamber 24 and the pressure chamber 25, however, are from one Plastic existing housing part 30 is formed, which with the bearing bracket 23 over Screw connections 31 is connected. A housing cover 28 closes the housing part 30 in the area of the impeller 27, which is also made of plastic. The housing part 30 and the housing cover 28 are connected to one another via screw connections 32.

    Einteilig mit dem Lagerträger 23 ist ein Befestigungsflansch 33 ausgebildet, welcher einerseits als Montageplatte für die Kreiselpumpe 21, und andererseits zur Aufnahme der Schraubverbindung 31 für den Gehäuseteil 30 dient.In one piece with the bearing bracket 23, a mounting flange 33 is formed, which on the one hand as a mounting plate for the centrifugal pump 21, and on the other hand for receiving the screw connection 31 for the housing part 30 is used.

    Die Antriebswelle 26 ist über ein beispielsweise als Wälzlager ausgebildetes Lager 26a am Lagerträger 23 gelagert. Der metallische Lagerträger 23 kann einerseits die Lagerkräfte der Antriebswelle 26 aufnehmen und die Lagerwärme optimal abführen.The drive shaft 26 is on a bearing 26a, for example, a bearing Bearing bracket 23 stored. The metallic bearing bracket 23 can on the one hand the bearing forces of the Take up drive shaft 26 and optimally dissipate the bearing heat.

    Mit 27a ist ein eintrittsseitiger Saugmund des Laufrades 27 bezeichnet. Zwischen dem Lager 26a und dem Saugmund 27a bzw. dem Saugraum 24 ist eine Gleitringdichtung 26b angeordnet. An die Kupplung 29 kann ein nicht weiter dargestelltes Antriebsaggregat angeschlossen werden.With 27a an inlet-side suction mouth of the impeller 27 is designated. Between the camp 26a and the suction mouth 27a and the suction chamber 24, a mechanical seal 26b is arranged. A drive unit, not shown, can be connected to the clutch 29 become.

    Zweckmäßigerweise kann auch der Ansaugflansch 24a einteilig mit dem Gehäuseteil 30 und somit aus Kunststoff ausgeführt sein. Der vorteilhafterweise im, Spritzgußverfahren hergestellte Gehäuseteil 30 aus Kunststoff ist wesentlich kostengünstiger herzustellen, als der in Fig. 1 ersichtliche, im Druckgußverfahren hergestellte Gehäuseteil 3 und darüber hinaus können auch kompliziertere Werkstückgeometrien des Gehäuseteiles 30 aus Kunststoff viel prozeßsicherer hergestellt werden als aus Metall.The suction flange 24a can also expediently be made in one piece with the housing part 30 and thus be made of plastic. The advantageously produced in the injection molding process Housing part 30 made of plastic is much cheaper to produce than in Fig. 1 apparent, die-cast housing part 3 and beyond also more complicated workpiece geometries of the housing part 30 made of plastic much more reliable be made as of metal.

    Als Kunststoffmaterial für den Gehäuseteil 30 und den Gehäusedeckel 28 kann beispielsweise Ryton mit einer Dichte von etwa 1,98 kg/dm3 verwendet werden.For example, Ryton with a density of approximately 1.98 kg / dm 3 can be used as the plastic material for the housing part 30 and the housing cover 28.

    Der Lagerträger 23 besteht zweckmäßigerweise aus Aluminium oder Magnesium oder einer entsprechenden Aluminium- bzw. Magnesiumlegierung.The bearing bracket 23 is advantageously made of aluminum or magnesium or one corresponding aluminum or magnesium alloy.

    Dadurch, daß ein Lagerträger 23 für verschiedene Gehäuseteile 30 und somit auch für verschiedene Spiralgeometrien verwendet werden kann, kann eine hohe Variationsvielfalt mit äußerst geringem Herstellungsaufwand erreicht werden.Characterized in that a bearing bracket 23 for different housing parts 30 and thus also for different Spiral geometries can be used with a wide variety of variations extremely low manufacturing costs can be achieved.

    Die erfindungsgemäße Ausführung der Kreiselpumpe ermöglicht eine Kostenreduktion bis zu etwa 50% und eine Gewichtsreduktion von bis zu etwa 30% im Vergleich zu konventionellen Kreiselpumpen mit Metallgehäuse.The design of the centrifugal pump according to the invention enables a cost reduction of up to about 50% and a weight reduction of up to about 30% compared to conventional ones Centrifugal pumps with a metal housing.

    Claims (8)

    Kreiselpumpe mit einem auf einer Antriebswelle (26) befestigten Laufrad (27) und einem mehrteiligen Pumpengehäuse (22), das teilweise aus Kunststoff hergestellt ist, in welchem ein auf der Antriebsseite des Laufrades (27) angeordneter Saugraum und ein spiralförmiger Druckraum (25) ausgebildet sind, wobei ein im Bereich des Saugraumes (24) angeordneter Lagerträger (23) aus metallischem Werkstoff besteht, und wobei das Pumpengehäuse (22) auf der Antriebsseite einen Ansaugflansch (24a) und im Bereich des Druckraumes (25) einen Gehäusedeckel (28) aufweist, dadurch gekennzeichnet, daß der Saugraum (24) einerseits durch den Lagerträger (23) und andererseits durch einen aus Kunststoff bestehenden und den Lagerträger (23) umgebenden, mit dem Lagerträger (23) vorzugsweise lösbar verbundenen Gehäuseteil (30) begrenzt ist.Centrifugal pump with an impeller (27) attached to a drive shaft (26) and a multi-part pump housing (22), which is partly made of plastic, in which a suction chamber arranged on the drive side of the impeller (27) and a spiral pressure chamber (25) are formed A bearing bracket (23) arranged in the area of the suction chamber (24) consists of metallic material, and the pump housing (22) has a suction flange (24a) on the drive side and a housing cover (28) in the region of the pressure chamber (25) , characterized in that the suction space (24) is delimited on the one hand by the bearing bracket (23) and on the other hand by a housing part (30) consisting of plastic and surrounding the bearing bracket (23) and preferably detachably connected to the bearing bracket (23). Kreiselpumpe nach Anspruch 1, dadurch gekennzeichnet, daß der Gehäusedeckel (28) aus Kunststoffbesteht.Centrifugal pump according to claim 1, characterized in that the housing cover (28) consists of plastic. Kreiselpumpe nach Anspruch 2, dadurch gekennzeichnet, daß der Gehäusedeckel (28) einteilig mit dem den Saugraum (24) zum Teil bildenden Gehäuseteil (30) ausgebildet ist.Centrifugal pump according to Claim 2, characterized in that the housing cover (28) is formed in one piece with the housing part (30) which partially forms the suction chamber (24). Kreiselpumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Ansaugflansch (24a) aus Kunststoff besteht und vorzugsweise einteilig mit dem den Saugraum (24) zum Teil bildenden Gehäuseteil (30) ausgebildet ist.Centrifugal pump according to one of claims 1 to 3, characterized in that the suction flange (24a) consists of plastic and is preferably formed in one piece with the housing part (30) which partially forms the suction space (24). Kreiselpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Lagerträger (23) einstückig mit einem antriebsseitigen Befestigungsflansch (33) ausgebildet ist, auf welchen der den Saugraum (24) zumindest zum Teil bildende Gehäuseteil (30) vorzugsweise lösbar befestigt ist.Centrifugal pump according to one of claims 1 to 4, characterized in that the bearing bracket (23) is formed in one piece with a drive-side fastening flange (33) on which the housing part (30) forming the suction chamber (24), at least in part, is preferably detachably fastened. Kreiselpumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Lagerträger (23) aus Aluminium oder Magnesium oder einer Aluminium- bzw. Magnesiumlegierung besteht.Centrifugal pump according to one of claims 1 to 5, characterized in that the bearing bracket (23) consists of aluminum or magnesium or an aluminum or magnesium alloy. Kreiselpumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Saugraum (24) ringförmig ausgebildet ist und den Lagerträger (23) außen umgibt, und daß der Gehäuseteil (30) im wesentlichen konzentrisch zum Lagerträger (23) ausgebildet ist.Centrifugal pump according to one of claims 1 to 6, characterized in that the suction space (24) is annular and surrounds the bearing bracket (23) on the outside, and that the housing part (30) is essentially concentric with the bearing bracket (23). Kreiselpumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Gehäuseteil (30) den Druckraum (25) teilweise begrenzt.Centrifugal pump according to one of claims 1 to 7, characterized in that the housing part (30) partially delimits the pressure chamber (25).
    EP99890088A 1998-03-16 1999-03-11 Centrifugal pump Expired - Fee Related EP0943809B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    AT0046398A AT408791B (en) 1998-03-16 1998-03-16 ROTARY PUMP
    AT46398 1998-03-16

    Publications (3)

    Publication Number Publication Date
    EP0943809A2 true EP0943809A2 (en) 1999-09-22
    EP0943809A3 EP0943809A3 (en) 2000-07-19
    EP0943809B1 EP0943809B1 (en) 2002-06-05

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    ID=3491302

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP99890088A Expired - Fee Related EP0943809B1 (en) 1998-03-16 1999-03-11 Centrifugal pump

    Country Status (5)

    Country Link
    US (1) US6158958A (en)
    EP (1) EP0943809B1 (en)
    AT (2) AT408791B (en)
    DE (1) DE59901585D1 (en)
    ES (1) ES2175924T3 (en)

    Cited By (1)

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    US7047914B2 (en) 2001-02-15 2006-05-23 Litens Automotive Internal combustion engine combination with direct camshaft driven coolant pump
    US7988408B2 (en) * 2007-05-04 2011-08-02 Envirotech Pumpsystems, Inc. Two-piece bearing housing for a centrifugal pump
    KR101080770B1 (en) * 2009-11-26 2011-11-07 기아자동차주식회사 Electric water pump

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    EP0208074A2 (en) 1985-07-09 1987-01-14 Thyssen Plastik Anger Kg Water pump
    DE4319618A1 (en) 1993-06-14 1994-12-15 Wilo Gmbh Submersible motor-driven pump

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1120572A2 (en) * 2000-01-28 2001-08-01 Bühler Motor GmbH Centrifugal pump
    EP1120572A3 (en) * 2000-01-28 2002-09-18 Bühler Motor GmbH Centrifugal pump

    Also Published As

    Publication number Publication date
    ES2175924T3 (en) 2002-11-16
    US6158958A (en) 2000-12-12
    ATA46398A (en) 2001-07-15
    AT408791B (en) 2002-03-25
    EP0943809A3 (en) 2000-07-19
    ATE218676T1 (en) 2002-06-15
    EP0943809B1 (en) 2002-06-05
    DE59901585D1 (en) 2002-07-11

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