EP2469102B1 - Motor vehicle coolant pump - Google Patents

Motor vehicle coolant pump Download PDF

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Publication number
EP2469102B1
EP2469102B1 EP10196523.4A EP10196523A EP2469102B1 EP 2469102 B1 EP2469102 B1 EP 2469102B1 EP 10196523 A EP10196523 A EP 10196523A EP 2469102 B1 EP2469102 B1 EP 2469102B1
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EP
European Patent Office
Prior art keywords
housing part
pump
pump rotor
motor vehicle
coolant
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.)
Active
Application number
EP10196523.4A
Other languages
German (de)
French (fr)
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EP2469102A1 (en
Inventor
Stephan Schreckenberg
Thomas Wienecke
Björn Isenberg
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.)
Pierburg Pump Technology GmbH
Original Assignee
Pierburg Pump Technology 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 Pierburg Pump Technology GmbH filed Critical Pierburg Pump Technology GmbH
Priority to EP10196523.4A priority Critical patent/EP2469102B1/en
Priority to PCT/EP2011/063210 priority patent/WO2012084278A1/en
Priority to CN201180068259.4A priority patent/CN103384771B/en
Priority to US13/996,548 priority patent/US9458757B2/en
Publication of EP2469102A1 publication Critical patent/EP2469102A1/en
Application granted granted Critical
Publication of EP2469102B1 publication Critical patent/EP2469102B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant 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
    • 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 motor vehicle coolant pump for supplying a motor vehicle internal combustion engine or other automotive heat sources with a coolant, wherein the coolant pump has a housing with a separate housing part for the pump rotor.
  • the manufacturers of automotive coolant pumps usually supply coolant pumps to many different manufacturers of internal combustion engines or motor vehicles.
  • the centrifugal pump has become established as a standard, which has an axial coolant inlet and a tangential coolant outlet. Except for the way of driving the coolant pump and the size of the coolant pump, i.a. is determined by the cooling capacity, the rotational angle of the tangential coolant outlet also varies in relation to the hull housing of the coolant pump. As a result, the coolant pump manufacturer even has to provide a multiplicity of different housing variants for a single coolant pump type with the same drive and the same power.
  • the object of the invention is to simplify the production of coolant pumps with different housing variants.
  • the automotive coolant pump according to claim 1 has a two-part pump housing, which has a one-piece pump rotor housing part and a separate one-piece body housing part.
  • Pump rotor housing part is arranged around an axial rotatable pump rotor.
  • the pump rotor housing is thus not formed by the engine block.
  • An axial coolant inlet and a tangential coolant outlet, which may also have a radial component, are provided on the pump rotor housing part.
  • Both housing parts each have an annular mounting flange which radially fixes the housing parts to one another and, in principle, permits assembly of the housing parts in each rotational position relative to one another.
  • a separate rotational fixing is provided which consists of a recess on the one housing part and a recess engaging in the nose on the other housing part. Only by the rotational fixing the assembly of the two housing parts in only a single angle of rotation is allowed to each other. Other mounting angles are blocked.
  • the recess and the nose are each provided directly on the mounting flange.
  • the rotational fixation is thus realized in a very minimalist way.
  • the recess on the one housing part can be produced for example by a machining process with little effort. Therefore, the mold of this housing part does not need to be changed at all, in order to provide a rotationally fixed fixation of the pump rotor housing part to the fuselage housing part in different rotational angles of rotation.
  • a single assembly rotation angle is defined by simple means, which excludes a false assembly.
  • an electric drive motor is arranged, which drives the pump rotor. It is an electric coolant pump.
  • the Axialfix ists arrangement is formed by a radially inwardly opening annular groove on the pump rotor housing part, a radially outwardly opening corresponding annular groove on the fuselage housing part and a radially prestressed snap ring, which projects radially into both annular grooves.
  • the snap ring is preferably biased radially outwards and preassembled in the annular groove of the fuselage housing part prior to assembly of the two flanges.
  • the design of the fixing arrangement with a snap ring offers a high level of installation safety and sufficiently high axial holding forces that exceed the axial forces caused by the coolant pressure in the pump rotor housing part.
  • the two mounting flanges form a plug-in flange connection, wherein the mounting flange of the pump rotor housing part is slipped with a cylindrical Flanschkragen radially outwardly beyond the mounting flange of the fuselage housing part.
  • the two mounting flange are fixed radially to each other, but in principle are rotatable to each other.
  • the two mounting flanges each have lying in a horizontal plane and facing each other horizontal annular surfaces and facing cylinder ring surfaces.
  • a sealing ring is arranged between the flange collar and the opposite mounting flange, which sits in a radial sealing ring groove of one of the two mounting flanges.
  • the sealing ring is thus pressed radially, and does not have to be pressed by axial forces.
  • the rotational fixing recess is provided axially in the flange collar.
  • the Drehfix ists- nose is integral with the cylindrical Hull housing part formed and preferably protrudes radially from the cylindrical outer side of the hull housing part.
  • one of the two mounting flanges on a wedge-shaped in cross-section wedge ring surface which pushes back axially the snap ring and optionally the sealing ring in the axial collapse of the two mounting flanges.
  • the snap ring and optionally the sealing ring are in this case pre-mounted on the mounting flange, which does not have the tapered ring surface.
  • the wedge ring surface thus pushes both the snap ring and the sealing ring radially into the respective annular groove during the axial assembly movement, and in this way serves as a so-called joint chamfer.
  • the coolant pump 10 serves to supply a motor vehicle with a coolant, preferably water.
  • the coolant pump 10 has a substantially two-part pump housing, which in turn essentially consists of a metallic and cylindrical body housing part 14 and a mounted at one longitudinal end thereof on the pump rotor housing part 12 made of metal or plastic. At its other distal end, the body-housing part 12 is closed by a cover 13, under which the engine electronics 36 is arranged.
  • an electric drive motor 30 is arranged, which has among other stator stator coils 32 and the rotor side permanent magnetic rotor poles 34.
  • the drive motor 30 is designed as a split-pot motor, i. the entire motor rotor, including the rotor poles 34, is arranged in the wet region and is shielded from the stator coils 32 in a liquid-tight manner.
  • the rotor further comprises a pump rotor 38 which is rotatably connected to the drive motor 30 and which is surrounded by the pump rotor housing part 12.
  • the pump rotor housing part 12 has an axial coolant inlet 40 with an inlet port 42 and a tangential coolant outlet 44 with a tangential outlet port 45.
  • the coolant flows through the pump inlet 40 into the pump rotor housing part 12, is rotated by the pump rotor 38, and is moved outwardly into the outlet scroll 52, from where the coolant flows tangentially out through the coolant outlet 44.
  • the two housing parts 12,14 each have an annular mounting flange 16,18 which fixes the two housing parts 12,14 radially and axially to each other.
  • the two housing parts 12, 14 are fixed radially to one another and axially in one direction by the mounting flange, but are rotatable relative to one another.
  • a rotational fixing 20 is provided, which consists essentially of a recess 21 on a cylindrical flange collar 17 of the mounting flange 16 of the Pump rotor housing part 12 and consists of a recess 21 engaging in the nose 22 of the body-housing part 14.
  • the nose 22 protrudes radially outwardly from the cylindrical outer side of the fuselage housing part 14.
  • Both the pump rotor housing part 12 and the fuselage housing part 14 can always be molded or sprayed from the same mold, regardless of the rotational angle of rotation of the coolant outlet 44 relative to the fuselage housing part 14.
  • the recess 21 must be machined only at the corresponding position of the pump rotor housing part 12.
  • the recess 21 can also be provided by a simple placeholder in the corresponding mold for the pump rotor housing part 12. In this way, with very little effort, the rotational rotational angle of the coolant outlet 44 in relation to the hull housing part 14 can be fixed.
  • the two mounting flanges 16,18 form a plug-in connection, as is known for example from pipe joints.
  • the assembly of the pump rotor housing part 12 to the fuselage housing part 14 takes place without screws or similar means.
  • a self-locking Axialfix ists- arrangement 25 is provided for axial fixing.
  • the Axialfix ists arrangement 25 is provided by a radially inwardly opening annular groove 26 on the flange collar 17 of the pump rotor housing part 12, a radially outwardly opening and lying in the same transverse plane corresponding annular groove 28 on the cylindrical outer side of the fuselage housing part 14 and a radially externally biased snap ring 24 is formed, which projects in the mounting position in both annular grooves 26,28.
  • the body shell part 14 has a sealing ring groove 48 for a sealing ring 49.
  • the flange collar 17 has on its radial inside a proximally widening and wedge-shaped in cross-section wedge ring surface 50 which pushes the sealing ring 49 and then the snap ring 24 axially in their respective annular groove 48,28 in the required for assembly axial collapse of the two mounting flanges 16,18 first.
  • the wedge angle is between 5 ° and 30 °. In the assembly or end position of the snap ring 24 jumps outwardly into the Flanschkragen annular groove 26, whereby the two mounting flange 16,18 are axially permanently inextricably locked together axially.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Description

Die Erfindung bezieht sich auf eine Kfz-Kühlmittelpumpe zur Versorgung eines Kfz-Verbrennungsmotors oder anderer Kfz.-Wärmequellen mit einem Kühlmittel, wobei die Kühlmittelpumpe ein Gehäuse mit einem separaten Gehäuseteil für den Pumpenrotor aufweist.The invention relates to a motor vehicle coolant pump for supplying a motor vehicle internal combustion engine or other automotive heat sources with a coolant, wherein the coolant pump has a housing with a separate housing part for the pump rotor.

Die Hersteller von Kfz-Kühlmittelpumpen liefern Kühlmittelpumpen in der Regel an viele verschiedene Hersteller von Verbrennungsmotoren bzw. Kraftfahrzeugen. Als Pumpenbauart hat sich die Kreisel-Pumpe als Standard etabliert, die einen axialen Kühlmittel-Einlass und einen tangentialen Kühlmittel-Auslass aufweist. Außer der Art des Antriebs der Kühlmittelpumpe und der Größe der Kühlmittelpumpe, die u.a. durch die Kühlleistung bestimmt wird, variiert auch der rotatorische Winkel des tangentialen Kühlmittel- Auslasses im Verhältnis zum Rumpf-Gehäuse der Kühlmittelpumpe. Hierdurch muss der Kühlmittelpumpen-Hersteller sogar für einen einzigen Kühlmittelpumpen-Typ gleichen Antriebs und gleicher Leistung eine Vielzahl verschiedener Gehäuse-Varianten zur Verfügung stellen.The manufacturers of automotive coolant pumps usually supply coolant pumps to many different manufacturers of internal combustion engines or motor vehicles. As a pump type, the centrifugal pump has become established as a standard, which has an axial coolant inlet and a tangential coolant outlet. Except for the way of driving the coolant pump and the size of the coolant pump, i.a. is determined by the cooling capacity, the rotational angle of the tangential coolant outlet also varies in relation to the hull housing of the coolant pump. As a result, the coolant pump manufacturer even has to provide a multiplicity of different housing variants for a single coolant pump type with the same drive and the same power.

Aus US 6,045,340 A ist eine elektrische Wasserpumpe mit einem mehrteiligen Gehäuse bekannt, wobei eine Drehfixierung und eine rastende Axialfixierung in Form von mehreren außenseitig über den Umfang verteilten Rastclips vorgesehen ist.Out US 6,045,340 A an electric water pump with a multi-part housing is known, wherein a rotational fixing and a locking axial fixing in the form of a plurality of externally distributed over the circumference locking clips is provided.

Aufgabe der Erfindung ist es, die Herstellung von Kühlmittelpumpen mit verschiedenen Gehäuse-Varianten zu vereinfachen.The object of the invention is to simplify the production of coolant pumps with different housing variants.

Diese Aufgabe wird erfindungsgemäß gelöst mit den Merkmalen des Patentanspruches 1.This object is achieved by the features of claim 1.

Die Kfz-Kühlmittelpumpe gemäß Patentanspruch 1 weist ein zweiteiliges Pumpengehäuse auf, das ein einstückiges Pumpenrotor-Gehäuseteil und ein separates einstückiges Rumpf-Gehäuseteil aufweist. In dem Pumpenrotor-Gehäuseteil ist ein um eine Axiale drehbarer Pumpenrotor angeordnet. Das Pumpenrotor-Gehäuse wird also nicht von dem Motorblock gebildet. An dem Pumpenrotor-Gehäuseteil sind ein axialer Kühlmittel-Einlass und ein tangentialer Kühlmittel-Auslass vorgesehen, der auch eine radiale Komponente haben kann. Beide Gehäuseteile weisen jeweils einen kreisringförmigen Montageflansch auf, der die Gehäuseteile zueinander radial fixiert und prinzipiell eine Montage der Gehäuseteile in jeder rotatorische Position zueinander erlaubt. Ferner ist eine separate Drehfixierung vorgesehen, die aus einer Ausnehmung an dem einen Gehäuseteil und einer in die Ausnehmung eingreifenden Nase an dem anderen Gehäuseteil besteht. Erst durch die Drehfixierung wird die Montage der beiden Gehäuseteile in nur einem einzigen Drehwinkel zueinander erlaubt. Andere Montage-Drehwinkel sind blockiert. Vorzugsweise sind die Ausnehmung und die Nase jeweils unmittelbar an dem Montageflansch vorgesehen.The automotive coolant pump according to claim 1 has a two-part pump housing, which has a one-piece pump rotor housing part and a separate one-piece body housing part. By doing Pump rotor housing part is arranged around an axial rotatable pump rotor. The pump rotor housing is thus not formed by the engine block. An axial coolant inlet and a tangential coolant outlet, which may also have a radial component, are provided on the pump rotor housing part. Both housing parts each have an annular mounting flange which radially fixes the housing parts to one another and, in principle, permits assembly of the housing parts in each rotational position relative to one another. Furthermore, a separate rotational fixing is provided which consists of a recess on the one housing part and a recess engaging in the nose on the other housing part. Only by the rotational fixing the assembly of the two housing parts in only a single angle of rotation is allowed to each other. Other mounting angles are blocked. Preferably, the recess and the nose are each provided directly on the mounting flange.

Die Drehfixierung ist also auf sehr minimalistische Weise realisiert. Die Ausnehmung an dem einen Gehäuseteil kann beispielsweise durch ein spanabhebendes Verfahren mit geringem Aufwand hergestellt werden. Die Gussform dieses Gehäuseteils braucht daher überhaupt nicht verändert zu werden, um eine drehfeste Fixierung des Pumpenrotor-Gehäuseteils an dem Rumpf-Gehäuseteil in verschiedenen rotatorische Drehwinkeln zur Verfügung zu stellen. Gleichzeitig wird mit einfachen Mitteln jeweils ein einziger Montage-Drehwinkel definiert, der eine Falschmontage ausschließt.The rotational fixation is thus realized in a very minimalist way. The recess on the one housing part can be produced for example by a machining process with little effort. Therefore, the mold of this housing part does not need to be changed at all, in order to provide a rotationally fixed fixation of the pump rotor housing part to the fuselage housing part in different rotational angles of rotation. At the same time a single assembly rotation angle is defined by simple means, which excludes a false assembly.

In dem Rumpf-Gehäuseteil ist ein elektrischer Antriebsmotor angeordnet, der den Pumpenrotor antreibt. Es handelt sich um eine elektrische Kühlmittelpumpe.In the fuselage housing part, an electric drive motor is arranged, which drives the pump rotor. It is an electric coolant pump.

Es ist eine selbstrastende Axialfixierungs-Anordnung zur axialen Fixierung der beiden Gehäuseteile miteinander vorgesehen. Beim axialen Aufeinanderschieben der beiden Montageflansche rastet die Axialfixierungs- Anordnung in der Endposition ein. Eine Verschraubung der beiden Gehäuseteile bzw. der beiden Montageflansche miteinander entfällt. Hierdurch ist die Herstellung sehr einfach und preiswert realisierbar.It is a self-locking Axialfixierungs arrangement for axially fixing the two housing parts together. When the two mounting flanges are pushed axially together, the axial fixing arrangement engages in the end position. A screw connection of the two housing parts or the two mounting flanges deleted together. As a result, the production is very simple and inexpensive to implement.

Die Axialfixierungs-Anordnung wird von einer nach radial innen öffnenden Ringnut an dem Pumpenrotor -Gehäuseteil, einer nach radial außen öffnenden korrespondierenden Ringnut an dem Rumpf-Gehäuseteil und einem radial vorgespannten Sprengring gebildet, der radial in beide Ringnuten hineinragt. Der Sprengring ist bevorzugt radial nach außen vorgespannt und vor der Montage der beiden Flansche in der Ringnut des Rumpf-Gehäuseteils vormontiert. Die Ausgestaltung der Fixierungs-Anordnung mit einem Sprengring bietet eine hohe Montagesicherheit und ausreichend hohe axiale Haltekräfte, die die durch den Kühlmitteldruck in dem Pumpenrotor-Gehäuseteil verursachten Axialkräfte übersteigen.The Axialfixierungs arrangement is formed by a radially inwardly opening annular groove on the pump rotor housing part, a radially outwardly opening corresponding annular groove on the fuselage housing part and a radially prestressed snap ring, which projects radially into both annular grooves. The snap ring is preferably biased radially outwards and preassembled in the annular groove of the fuselage housing part prior to assembly of the two flanges. The design of the fixing arrangement with a snap ring offers a high level of installation safety and sufficiently high axial holding forces that exceed the axial forces caused by the coolant pressure in the pump rotor housing part.

Vorzugsweise bilden die beiden Montageflansche eine Steckflansch-Verbindung, wobei der Montageflansch des Pumpenrotor-Gehäuseteils mit einem zylindrischen Flanschkragen radial außen über den Montageflansch des Rumpf-Gehäuseteils gestülpt ist. Hierdurch werden die beiden Montageflansch radial zueinander festgesetzt, sind jedoch zueinander grundsätzlich drehbar. Die beiden Montageflansche weisen also jeweils in einer Horizontalebene liegende und einander zugewandte Horizontalringflächen als auch einander zugewandte Zylinderringflächen auf.Preferably, the two mounting flanges form a plug-in flange connection, wherein the mounting flange of the pump rotor housing part is slipped with a cylindrical Flanschkragen radially outwardly beyond the mounting flange of the fuselage housing part. As a result, the two mounting flange are fixed radially to each other, but in principle are rotatable to each other. Thus, the two mounting flanges each have lying in a horizontal plane and facing each other horizontal annular surfaces and facing cylinder ring surfaces.

Vorzugsweise ist zwischen dem Flanschkragen und dem gegenüberliegenden Montageflansch ein Dichtring angeordnet, der in einer radialen Dichtring- Ringnut einer der beiden Montageflansche sitzt. Der Dichtring wird also radial verpresst, und muss nicht durch axiale Kräfte verpresst werden.Preferably, a sealing ring is arranged between the flange collar and the opposite mounting flange, which sits in a radial sealing ring groove of one of the two mounting flanges. The sealing ring is thus pressed radially, and does not have to be pressed by axial forces.

Gemäß einer bevorzugten Ausgestaltung ist die Drehfixierungs-Ausnehmung axial in dem Flanschkragen vorgesehen. Ferner ist besonders bevorzugt die Drehfixierungs- Nase einstückig mit dem zylindrischen Rumpf- Gehäuseteil ausgebildet und ragt bevorzugt radial von der zylindrischen Außenseite des Rumpf- Gehäuseteils ab. Wie oben bereits beschrieben, kann auf diese Weise ohne jede Veränderung der Gussformen für die beiden Gehäuseteile und durch einfaches Fräsen der Drehfixierungs-Ausnehmung an der entsprechenden rotatorische Position im Prinzip jeder Drehwinkel des tangentialen Kühlmittel- Auslasses im Verhältnis zu dem Rumpf-Gehäuseteil festgelegt werden.According to a preferred embodiment, the rotational fixing recess is provided axially in the flange collar. Furthermore, particularly preferably the Drehfixierungs- nose is integral with the cylindrical Hull housing part formed and preferably protrudes radially from the cylindrical outer side of the hull housing part. As described above, in this way, without any change of the molds for the two housing parts and by simply milling the Drehfixierungs-recess at the corresponding rotational position, in principle, each angle of rotation of the tangential coolant outlet can be determined in relation to the fuselage housing part.

Gemäß einer bevorzugten Ausgestaltung weist eine der beiden Montageflansche eine im Querschnitt keilförmige Keilringfläche auf, die bei dem axialen Zusammenschieben der beiden Montageflansche den Sprengring und gegebenenfalls den Dichtring axial zurückschiebt. Der Sprengring und gegebenenfalls der Dichtring sind hierbei an dem Montageflansch vormontiert, der nicht die Keilringfläche aufweist. Die Keilringfläche schiebt also bei der axialen Montagebewegung sowohl den Sprengring als auch den Dichtring radial in die betreffende Ringnut hinein, und dient auf diese Weise als sog. Fügefase.According to a preferred embodiment, one of the two mounting flanges on a wedge-shaped in cross-section wedge ring surface, which pushes back axially the snap ring and optionally the sealing ring in the axial collapse of the two mounting flanges. The snap ring and optionally the sealing ring are in this case pre-mounted on the mounting flange, which does not have the tapered ring surface. The wedge ring surface thus pushes both the snap ring and the sealing ring radially into the respective annular groove during the axial assembly movement, and in this way serves as a so-called joint chamfer.

Im Folgenden wird unter Bezugnahme auf die Zeichnungen ein Ausführungsbeispiel der Erfindung näher erläutert.In the following an embodiment of the invention will be explained in more detail with reference to the drawings.

Es zeigen:

Figur 1
eine perspektivische Außenansicht einer elektrischen Kfz-Kühlmittelpumpe mit einem Rumpf-Gehäuseteil und einem Pumpenrotor-Gehäuseteil, das einen axialen Kühlmittel-Einlass und einen tangentialen Kühlmittel-Auslass aufweist, und
Figur 2
einen Längsschnitt der Kfz-Kühlmittelpumpe der Figur 1.
Show it:
FIG. 1
an external perspective view of an electric motor vehicle coolant pump with a body shell and a housing portion of the pump rotor having an axial coolant inlet and a tangential coolant outlet, and
FIG. 2
a longitudinal section of the motor vehicle coolant pump FIG. 1 ,

In der Figur 1 ist eine Kfz-Kühlmittelpumpe 10 in perspektivische Ansicht dargestellt. Die Kühlmittelpumpe 10 dient der Versorgung eines Kfz-Verbrennungsmotors mit einem Kühlmittel, vorzugsweise Wasser. Die Kühlmittelpumpe 10 weist ein im wesentlichen zweiteiliges Pumpengehäuse auf, das sich wiederum im wesentlichen aus einem metallischen und zylindrischen Rumpf-Gehäuseteil 14 und einem an einem Längsende darauf montierten Pumpenrotor-Gehäuseteil 12 aus Metall oder Kunststoff zusammensetzt. An seinem anderen distalen Ende ist das Rumpf-Gehäuseteil 12 durch einen Deckel 13 verschlossen, unter dem die Motorelektronik 36 angeordnet ist.In the FIG. 1 a motor vehicle coolant pump 10 is shown in perspective view. The coolant pump 10 serves to supply a motor vehicle with a coolant, preferably water. The coolant pump 10 has a substantially two-part pump housing, which in turn essentially consists of a metallic and cylindrical body housing part 14 and a mounted at one longitudinal end thereof on the pump rotor housing part 12 made of metal or plastic. At its other distal end, the body-housing part 12 is closed by a cover 13, under which the engine electronics 36 is arranged.

In dem zylindrischen Rumpf-Gehäuseteil 14 ist ein elektrischer Antriebsmotor 30 angeordnet, der unter anderem statorseitig Statorspulen 32 und rotorseitig permanentmagnetische Rotorpole 34 aufweist. Der Antriebsmotor 30 ist als Spalttopf-Motor ausgebildet, d.h. der gesamte Motorrotor einschließlich der Rotorpole 34 ist im nassen Bereich angeordnet und flüssigkeitsdicht abgeschirmt gegenüber den Statorspulen 32.In the cylindrical body-housing part 14, an electric drive motor 30 is arranged, which has among other stator stator coils 32 and the rotor side permanent magnetic rotor poles 34. The drive motor 30 is designed as a split-pot motor, i. the entire motor rotor, including the rotor poles 34, is arranged in the wet region and is shielded from the stator coils 32 in a liquid-tight manner.

Der Rotor weist ferner einen Pumpenrotor 38 auf, der mit dem Antriebsmotor 30 drehfest verbunden ist und der von dem Pumpenrotor-Gehäuseteil 12 umgeben ist. Das Pumpenrotor-Gehäuseteil 12 weist einen axialen Kühlmittel-Einlass 40 mit einem Einlassstutzen 42 und einen tangentialen Kühlmittel-Auslass 44 mit einem tangentialen Auslassstutzen 45 auf. Das Kühlmittel fließt durch den Pumpen-Einlass 40 in das Pumpenrotor-Gehäuseteil 12 ein, wird durch den Pumpenrotor 38 in Rotation versetzt und nach außen in die Auslassspirale 52 bewegt, von wo aus das Kühlmittel durch den Kühlmittel-Auslass 44 tangential herausströmt.The rotor further comprises a pump rotor 38 which is rotatably connected to the drive motor 30 and which is surrounded by the pump rotor housing part 12. The pump rotor housing part 12 has an axial coolant inlet 40 with an inlet port 42 and a tangential coolant outlet 44 with a tangential outlet port 45. The coolant flows through the pump inlet 40 into the pump rotor housing part 12, is rotated by the pump rotor 38, and is moved outwardly into the outlet scroll 52, from where the coolant flows tangentially out through the coolant outlet 44.

Die beiden Gehäuseteile 12,14 weisen jeweils einen ringartigen Montageflansch 16,18 auf, der die beiden Gehäuseteile 12,14 radial und axial zueinander fixiert. Ohne die im Folgenden noch beschriebene Drehfixierung 20 sind die beiden Gehäuseteile 12,14 durch den Montageflansch zwar radial und in einer Richtung auch axial zueinander fixiert, jedoch zueinander drehbar. Für die rotatorische Fixierung ist eine Drehfixierung 20 vorgesehen, die im wesentlichen aus einer Ausnehmung 21 an einem zylindrischen Flanschkragen 17 des Montageflansches 16 des Pumpenrotor-Gehäuseteils 12 und aus einer in die Ausnehmung 21 eingreifenden Nase 22 des Rumpf-Gehäuseteils 14 besteht.The two housing parts 12,14 each have an annular mounting flange 16,18 which fixes the two housing parts 12,14 radially and axially to each other. Without the rotary fixing 20, which will be described below, the two housing parts 12, 14 are fixed radially to one another and axially in one direction by the mounting flange, but are rotatable relative to one another. For rotational fixation, a rotational fixing 20 is provided, which consists essentially of a recess 21 on a cylindrical flange collar 17 of the mounting flange 16 of the Pump rotor housing part 12 and consists of a recess 21 engaging in the nose 22 of the body-housing part 14.

Die Nase 22 ragt radial nach außen von der zylindrischen Außenseite des Rumpf-Gehäuseteils 14 ab. Sowohl das Pumpenrotor-Gehäuseteil 12 als auch das Rumpf-Gehäuseteil 14 können unabhängig von dem rotatorischen Drehwinkel des Kühlmittel- Auslasses 44 im Verhältnis zu dem Rumpf-Gehäuseteil 14 stets aus derselben Form gegossen bzw. gespritzt werden. Für die Individualisierung und Festlegung des rotatorischen Winkels des Kühlmittel-Auslasses muss nur an der entsprechenden Position des Pumpenrotor-Gehäuseteils 12 die Ausnehmung 21 spanabhebend hergestellt werden. Alternativ kann die Ausnehmung 21 auch durch einen einfachen Platzhalter in der entsprechenden Gussform für das Pumpenrotor-Gehäuseteil 12 vorgesehen werden. Auf diese Weise ist mit sehr geringem Aufwand der rotatorische Drehwinkel des Kühlmittel-Auslasses 44 im Verhältnis zu dem Rumpf-Gehäuseteil 14 festlegbar.The nose 22 protrudes radially outwardly from the cylindrical outer side of the fuselage housing part 14. Both the pump rotor housing part 12 and the fuselage housing part 14 can always be molded or sprayed from the same mold, regardless of the rotational angle of rotation of the coolant outlet 44 relative to the fuselage housing part 14. For the individualization and definition of the rotational angle of the coolant outlet, the recess 21 must be machined only at the corresponding position of the pump rotor housing part 12. Alternatively, the recess 21 can also be provided by a simple placeholder in the corresponding mold for the pump rotor housing part 12. In this way, with very little effort, the rotational rotational angle of the coolant outlet 44 in relation to the hull housing part 14 can be fixed.

Die beiden Montageflansche 16,18 bilden eine Steckflansch-Verbindung, wie sie beispielsweise von Rohrverbindungen bekannt ist. Die Montage des Pumpenrotor-Gehäuseteils 12 an dem Rumpf-Gehäuseteil 14 erfolgt ohne Schrauben oder ähnliche Mittel. Zur axialen Fixierung ist eine selbstrastende Axialfixierungs- Anordnung 25 vorgesehen. Die Axialfixierungs-Anordnung 25 wird von einer nach radial innen öffnenden Ringnut 26 an dem Flanschkragen 17 des Pumpenrotor-Gehäuseteils 12, einer nach radial außen öffnenden und in derselben Querebene liegenden korrespondierenden Ringnut 28 an dem zylindrischen Außenseite des Rumpf-Gehäuseteils 14 und einem radial nach außen vorgespannten Sprengring 24 gebildet, der in der Montageposition in beide Ringnuten 26,28 hineinragt.The two mounting flanges 16,18 form a plug-in connection, as is known for example from pipe joints. The assembly of the pump rotor housing part 12 to the fuselage housing part 14 takes place without screws or similar means. For axial fixing a self-locking Axialfixierungs- arrangement 25 is provided. The Axialfixierungs arrangement 25 is provided by a radially inwardly opening annular groove 26 on the flange collar 17 of the pump rotor housing part 12, a radially outwardly opening and lying in the same transverse plane corresponding annular groove 28 on the cylindrical outer side of the fuselage housing part 14 and a radially externally biased snap ring 24 is formed, which projects in the mounting position in both annular grooves 26,28.

In axialer Richtung distal der Sprengring- Ringnut 28 weist das Rumpf-Gehäuseteil 14 eine Dichtring- Ringnut 48 für einen Dichtring 49 auf. Ferner weist der Flanschkragen 17 auf seiner radialen Innenseite eine sich proximal erweiternde und im Querschnitt keilförmige Keilringfläche 50 auf, die bei dem zu Montage erforderlichen axialen Zusammenschieben der beiden Montageflansche 16,18 zunächst den Dichtring 49 und anschließend den Sprengring 24 axial in ihre jeweilige Ringnut 48,28 schiebt. Der Keilwinkel beträgt zwischen 5° und 30°. In der Montage- bzw. Endposition springt der Sprengring 24 nach außen in die Flanschkragen-Ringnut 26 hinein, wodurch die beiden Montageflansch 16,18 axial endgültig unlösbar axial miteinander verrastet werden.In the axial direction, distal to the snap ring groove 28, the body shell part 14 has a sealing ring groove 48 for a sealing ring 49. Furthermore, the flange collar 17 has on its radial inside a proximally widening and wedge-shaped in cross-section wedge ring surface 50 which pushes the sealing ring 49 and then the snap ring 24 axially in their respective annular groove 48,28 in the required for assembly axial collapse of the two mounting flanges 16,18 first. The wedge angle is between 5 ° and 30 °. In the assembly or end position of the snap ring 24 jumps outwardly into the Flanschkragen annular groove 26, whereby the two mounting flange 16,18 are axially permanently inextricably locked together axially.

Claims (5)

  1. Electric motor vehicle coolant pump (10) for supplying a coolant to a motor vehicle internal combustion engine, comprising a two-part pump housing with an integral pump rotor housing part (2) and a separate integral body housing part (14), wherein
    a pump rotor (38) is arranged in the pump rotor housing part (12), the pump rotor being configured to be rotated about an axis;
    an electric drive motor (30) is arranged in the body housing part (14), the drive motor driving the pump rotor (38),
    an axial coolant inlet (40) and a tangential coolant outlet (44) are provided on the pump rotor housing part (12),
    both housing parts (12, 14) each comprise one annular mounting flange (16, 18), which fixes the housing parts (12, 14) radially with respect to each other and allows the housing parts (12, 14) to be assembled on each other in any rotary position,
    a rotary fixation (20) is provided which is formed by a recess (21) at one housing part (12) and a nose (22) configured to engage in the recess (21) at the other housing part (14), and which allows the two housing parts (12, 14) to be mounted with respect to each other in only one single rotational angle,
    a self-locking axial fixation arrangement (25) is provided to axially fix the two housing parts (12, 14) to each other, and
    the axial fixation arrangement (25) is formed by an inwardly open annular groove (26) in the pump rotor housing part (12), a corresponding outwardly open annular groove (28) in the body housing part (14), and by a radially biased spring-lock washer (24) configured to extend radially into each of the annular grooves (26, 28).
  2. Motor vehicle coolant pump (10) as recited in claim 1, wherein the two mounting flanges (16, 18) form a plug-in flange connection, a flange collar (17) of the mounting flange (16) of the pump rotor housing part (12) being set over the radial outer side of the mounting flange (18) of the body housing part (14).
  3. Motor vehicle coolant pump (10) as recited one of the preceding claims, wherein the rotary fixation recess (21) is arranged axially in the flange collar (17) and the rotary fixation nose (22) is preferably formed integrally with the cylindrical body housing part (14) and protrudes radially from the outer side thereof.
  4. Motor vehicle coolant pump (10) as recited one of the preceding claims, wherein a radial annular sealing ring groove (48) for a sealing ring (49) is arranged in one mounting flange (16).
  5. Motor vehicle coolant pump (10) as recited one of the preceding claims, wherein one of the two mounting flanges (16) comprises a wedge ring surface (50) with a wedge-shaped cross-section, which pushes back the spring-lock washer (24) and possibly the sealing ring (49) in an axial direction when the two mounting flanges (16, 18) are pushed together in the axial direction.
EP10196523.4A 2010-12-22 2010-12-22 Motor vehicle coolant pump Active EP2469102B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP10196523.4A EP2469102B1 (en) 2010-12-22 2010-12-22 Motor vehicle coolant pump
PCT/EP2011/063210 WO2012084278A1 (en) 2010-12-22 2011-08-01 Motor vehicle coolant pump
CN201180068259.4A CN103384771B (en) 2010-12-22 2011-08-01 Automotive coolant pump
US13/996,548 US9458757B2 (en) 2010-12-22 2011-08-01 Motor vehicle coolant pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10196523.4A EP2469102B1 (en) 2010-12-22 2010-12-22 Motor vehicle coolant pump

Publications (2)

Publication Number Publication Date
EP2469102A1 EP2469102A1 (en) 2012-06-27
EP2469102B1 true EP2469102B1 (en) 2017-08-02

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Application Number Title Priority Date Filing Date
EP10196523.4A Active EP2469102B1 (en) 2010-12-22 2010-12-22 Motor vehicle coolant pump

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US (1) US9458757B2 (en)
EP (1) EP2469102B1 (en)
CN (1) CN103384771B (en)
WO (1) WO2012084278A1 (en)

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DE102020130548A1 (en) 2020-11-19 2022-05-19 Nidec Gpm Gmbh Attachment between pump housing and motor housing of an electric pump

Also Published As

Publication number Publication date
US20130309084A1 (en) 2013-11-21
CN103384771B (en) 2016-08-24
WO2012084278A1 (en) 2012-06-28
EP2469102A1 (en) 2012-06-27
CN103384771A (en) 2013-11-06
US9458757B2 (en) 2016-10-04

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