EP3472470B1 - Electric fluid pump for a motor vehicle - Google Patents

Electric fluid pump for a motor vehicle Download PDF

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Publication number
EP3472470B1
EP3472470B1 EP16729946.0A EP16729946A EP3472470B1 EP 3472470 B1 EP3472470 B1 EP 3472470B1 EP 16729946 A EP16729946 A EP 16729946A EP 3472470 B1 EP3472470 B1 EP 3472470B1
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EP
European Patent Office
Prior art keywords
motor
pump
fluid pump
electric fluid
rotor
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Application number
EP16729946.0A
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German (de)
French (fr)
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EP3472470A1 (en
Inventor
Martin Helmis
Thomas Wienecke
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Pierburg Pump Technology GmbH
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Pierburg Pump Technology GmbH
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Publication of EP3472470A1 publication Critical patent/EP3472470A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/0626—Details of the can
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5813—Cooling the control unit
    • 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
    • F01P2005/105—Using two or more pumps
    • 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
    • F01P5/12—Pump-driving arrangements
    • F01P2005/125—Driving auxiliary pumps electrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/0633—Details of the bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0686—Mechanical details of the pump control unit

Definitions

  • the invention relates to an electric fluid pump for a motor vehicle with a housing assembly that defines at least one pump chamber and one motor chamber, the pump chamber having a pump rotor chamber for a pump unit with a pump rotor, and a drive motor with a motor stator with a motor coil arrangement and a motor rotor located in the engine chamber is provided, wherein the pump chamber and the motor chamber have a common front wall, wherein the motor rotor is connected in a torque-proof manner to a rotor shaft which is guided through the common front wall and on which the pump rotor is arranged in a torque-proof manner, and a motor controller is provided for controlling the drive motor, wherein the common end wall is designed as a mounting wall part on which at least the engine control is arranged in a heat-conducting manner.
  • a fluid pump for a motor vehicle is used to pump a fluid in a fluid circuit. It is known, for example, to pump a liquid heat carrier, always referred to below as a coolant, into a heating or coolant circuit.
  • the coolant circuit does not necessarily have to be a main stream of the circuit, but can also form a side stream. Essentially, however, engine units are to be cooled in the operating state by such a coolant circuit.
  • Electrically driven coolant pumps have been developed in particular in order to adapt the pump performance of such a coolant pump to the respective operating state of the motor vehicle engine.
  • An electronically commutated drive motor drives a pump unit.
  • the problem with such electronically commutated drive motors is basically the cooling of the drive motor and the motor controller for driving the motor coil arrangement has a plurality of line semiconductors which can heat up considerably during operation and must be cooled accordingly in order to prevent their destruction.
  • the motor coil arrangement is a heat source that should be thermally shielded or cooled as well as possible in relation to the motor control. It is therefore known from the prior art to use the coolant to be pumped in order to flow through the engine compartment in order in this way to cool an engine control space in which the engine control is provided.
  • An example of an electric coolant pump constructed in this way can be found in EP 2 796 722 A1 .
  • a major disadvantage of this known pump concept is the relatively large amount of space that this pump requires and the complicated fluid routing for cooling.
  • simplified cooling is from the prior art according to DE 199 43 862 A1 a generic electric fluid pump is known.
  • DE 199 43 577 A1 known to arrange an electronic module in thermally conductive contact with the rotor space in a receiving space.
  • DE 101 03 209 A1 it is also known to provide a one-piece motor housing together with a receiving space for electronic components.
  • the drive motor is an asymmetrically permanently excited drive motor, the motor stator and/or the motor coil arrangement being arranged on the mounting wall part and the motor coil arrangement arranged on the motor stator being provided on a side facing away from the motor controller in relation to the rotor shaft is.
  • the motor controller is arranged on the mounting wall part via a large-area plate element, in particular a circuit board, made of a heat-conducting material. In this way, an optimal heat transfer from the motor controller to the mounting wall part cooled by the cooling fluid can be ensured.
  • a cover element is fastened to the mounting wall part as part of the motor housing, and a closed motor housing is thus formed.
  • the engine compartment openly in the motor vehicle. If a cover element is present, the motor stator and/or the motor coil arrangement can be arranged on the cover element, which can offer advantages during assembly.
  • the motor stator and/or the motor coil arrangement is arranged on the assembly part via a heat-conducting means, such as a gap pad or a casting agent.
  • a heat-conducting means such as a gap pad or a casting agent.
  • the rotor shaft can be mounted in the mounting wall part via bearing means.
  • the mounting wall part advantageously has at least one shoulder element which runs axially parallel to the rotor shaft and on which the motor stator is fastened by means of fastening means. This ensures a particularly compact arrangement, with the rotor shaft and thus the motor rotor being coaxial with the motor stator in a simple manner.
  • a bearing element is provided for a containment shell, on which the containment shell is supported in a sealing manner, so that a motor rotor space is created as a space that carries coolant.
  • a pot end element can be provided in a sealing manner on the can and/or the motor stator.
  • the pot end element can also be an integral part of the split pot. Further bearing means for the rotor shaft can then be provided in the pot-end element.
  • a non-contact sensor in particular a Hall sensor, is provided in the area of the motor rotor, in particular in the area of the outside of the containment shell or integrated into it.
  • FIG 1 shows a sectional side view of an electric fluid pump 2 according to the invention, which is designed as a coolant pump, for a motor vehicle not shown in detail. It should be clear that the invention is not limited to such a coolant pump. Rather, all electric pumps and blowers fall within the scope of the invention.
  • the electric coolant pump 2 has a housing assembly 4 which defines a pump chamber 6 for a pump assembly 7 and a motor chamber 8 .
  • the pump chamber 6 has a pump rotor chamber 10 in a known manner, in which a pump rotor 12 is provided and is formed by a pump housing 13 in the present exemplary embodiment. Furthermore, the pump housing 13 has, in a known manner, an inlet 14 and an in figure 2 outlet 16 shown.
  • the pump chamber 6 and the motor chamber 8 are delimited by a common end wall 18 .
  • a cover element 20 is also provided, which is fastened to the common end wall 18 and thus forms a motor housing 22 with a closed motor compartment 8 in which a drive motor 24 and a motor controller 26 are provided.
  • a drive motor 24 and a motor controller 26 are provided.
  • the drive motor 24 is designed as an asymmetrically permanently excited drive motor, with a motor coil arrangement 30 arranged on a motor stator 28 being based on one Rotor shaft 32 is provided on the side facing away from the motor controller 26 .
  • a motor rotor 34 is arranged on the rotor shaft 32 in a rotationally fixed manner.
  • the pump rotor 12 is likewise fastened in a rotationally fixed manner on the rotor shaft 32 .
  • the motor stator 28 is designed here in a known manner as a laminated core.
  • the common end wall is designed as a mounting wall part, on which the motor controller 26 and the motor stator 28 are arranged in the present exemplary embodiment.
  • the motor coil arrangement 30 bears against the mounting wall part 18 via a casting agent 36 and can thus be cooled in a simple manner.
  • the motor controller 26 is provided on a large-area circuit board 38 , which in turn is fastened to the mounting wall part 18 . Due to the large-area thin circuit board 38 there is an optimal heat transfer from the engine control 26 to the mounting wall part 18 cooled by the cooling fluid.
  • the mounting wall part 18 also has a bearing element 40 on the inside of which a containment shell 42 with an integrated pot end element 44 is supported in a sealed manner via sealing means 46 .
  • a motor rotor space 48 that is delimited in this way can therefore be flowed through by cooling fluid.
  • the motor stator 28 designed as a stator assembly is arranged on shoulder elements 58 running parallel to the axis via screws 60 on the mounting wall part 18 (see figure 3 ).
  • the rotor shaft 32 extending through the mounting wall part 18 is mounted in the pot end element 42 and in the mounting wall part 18 via suitable bearing means 50 , 52 .
  • a non-contact sensor 54 designed as a Hall sensor, which in a known manner indicates a rotational position of the drive motor 24 is monitored and integrated into the can 42 in the area of a pole gap of the motor stator 28 .
  • FIG 2 now shows the electric fluid pump 2 in a sectional end view figure 1 .
  • Motor stator 28 which is designed as a stator core and has openings 56 through which the in figure 3 Screws 60 shown can be guided to attach the stator core 28 to the cylindrical shoulder elements 58 of the mounting wall part 18.
  • the motor stator 28 has a rectangular stator geometry, which makes it possible to reduce sheet metal production costs.
  • the arrangement according to the invention enables the electronics to be simplified and a simpler processor to be used by using the Hall sensor 54 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Synchronous Machinery (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Description

Die Erfindung betrifft eine elektrische Fluidpumpe für ein Kraftfahrzeug mit einem Gehäuseverbund, der zumindest einen Pumpenraum und einen Motorraum definiert, wobei der Pumpenraum einen Pumpenrotorraum für ein Pumpenaggregat mit einem Pumpenrotor aufweist und wobei in dem Motorraum ein Antriebsmotor mit einem Motorstator mit einer Motorspulenanordnung und einem Motorrotor vorgesehen ist, wobei der Pumpenraum und der Motorraum eine gemeinsame Stirnwand aufweisen, wobei der Motorrotor drehfest mit einer Rotorwelle verbunden ist, die durch die gemeinsame Stirnwand geführt ist und auf der der Pumpenrotor drehfest angeordnet ist und wobei eine Motorsteuerung zur Ansteuerung des Antriebsmotors vorgesehen ist, wobei die gemeinsame Stirnwand als Montagewandteil ausgebildet ist, auf der zumindest die Motorsteuerung wärmeleitend angeordnet ist.The invention relates to an electric fluid pump for a motor vehicle with a housing assembly that defines at least one pump chamber and one motor chamber, the pump chamber having a pump rotor chamber for a pump unit with a pump rotor, and a drive motor with a motor stator with a motor coil arrangement and a motor rotor located in the engine chamber is provided, wherein the pump chamber and the motor chamber have a common front wall, wherein the motor rotor is connected in a torque-proof manner to a rotor shaft which is guided through the common front wall and on which the pump rotor is arranged in a torque-proof manner, and a motor controller is provided for controlling the drive motor, wherein the common end wall is designed as a mounting wall part on which at least the engine control is arranged in a heat-conducting manner.

Eine Fluidpumpe für ein Kraftfahrzeug dient dazu, ein Fluid in einem Fluidkreislauf zu pumpen. So ist es bekannt, einen flüssigen Wärmeträger, im Folgenden stets Kühlmittel genannt, in einen Heiz- oder Kühlmittel-Kreislauf zu pumpen. Der Kühlmittel-Kreislauf muss nicht notwendiger Weise ein Hauptstrom des Kreislaufes sein, sondern kann auch einen Nebenstrom bilden. Im Wesentlichen sollen jedoch durch einen derartigen Kühlmittel-Kreislauf Motoraggregate im Betriebszustand gekühlt werden. Insbesondere um die Pumpenleistung einer derartigen Kühlmittelpumpe den jeweiligen Betriebszustand des Kraftfahrzeugmotors anzupassen, wurden elektrisch angetriebene Kühlmittelpumpen entwickelt. Hierbei treibt ein elektronisch kommutierter Antriebsmotor ein Pumpenaggregat an. Problematisch bei derartig elektronisch kommutierten Antriebsmotoren ist grundsätzlich die Kühlung des Antriebsmotors und der Motorsteuerung, die zur Ansteuerung der Motorspulenanordnung mehrere Leitungshalbleiter aufweist, die im Betrieb stark erhitzen können und entsprechend gekühlt werden müssen, um ihre Zerstörung zu verhindern. Die Motorspulenanordnung ist hierbei eine Wärmequelle, die in Bezug auf die Motorsteuerung thermisch möglichst gut abgeschirmt bzw. bekühlt sein sollen. Aus dem Stand der Technik ist es daher bekannt, das zu pumpende Kühlmittel zu nutzen, um den Motorraum zu durchströmen, um auf diese Weise einen Motorsteuerungsraum, in dem die Motorsteuerung vorgesehen ist, zu kühlen. Ein Beispiel für eine derartig aufgebaute elektrische Kühlmittelpumpe findet sich in der EP 2 796 722 A1 .A fluid pump for a motor vehicle is used to pump a fluid in a fluid circuit. It is known, for example, to pump a liquid heat carrier, always referred to below as a coolant, into a heating or coolant circuit. The coolant circuit does not necessarily have to be a main stream of the circuit, but can also form a side stream. Essentially, however, engine units are to be cooled in the operating state by such a coolant circuit. Electrically driven coolant pumps have been developed in particular in order to adapt the pump performance of such a coolant pump to the respective operating state of the motor vehicle engine. An electronically commutated drive motor drives a pump unit. The problem with such electronically commutated drive motors is basically the cooling of the drive motor and the motor controller for driving the motor coil arrangement has a plurality of line semiconductors which can heat up considerably during operation and must be cooled accordingly in order to prevent their destruction. In this case, the motor coil arrangement is a heat source that should be thermally shielded or cooled as well as possible in relation to the motor control. It is therefore known from the prior art to use the coolant to be pumped in order to flow through the engine compartment in order in this way to cool an engine control space in which the engine control is provided. An example of an electric coolant pump constructed in this way can be found in EP 2 796 722 A1 .

Ein großer Nachteil dieses bekannten Pumpenkonzeptes ist der relativ große Bauraum, den diese Pumpe benötigt sowie die komplizierte Flüssigkeitsführung zur Kühlung. Hinsichtlich einer vereinfachten Kühlung ist aus dem Stand der Technik gemäß der DE 199 43 862 A1 eine gattungsgemäße elektrische Fluidpumpe bekannt. Darüberhinaus ist es auch aus der DE 199 43 577 A1 bekannt, ein Elektronikmodul in wärmeleitfähigem Kontakt zum Rotorraum in einem Aufnahmeraum an zu ordnen. Aus der DE 101 03 209 A1 ist es des Weiteren bekannt, ein einstückiges Motorgehäuse mitsamt einem Aufnahmeraum für elektronische Bauteile vor zu sehen.A major disadvantage of this known pump concept is the relatively large amount of space that this pump requires and the complicated fluid routing for cooling. With regard to simplified cooling is from the prior art according to DE 199 43 862 A1 a generic electric fluid pump is known. In addition, it is also from the DE 199 43 577 A1 known to arrange an electronic module in thermally conductive contact with the rotor space in a receiving space. From the DE 101 03 209 A1 it is also known to provide a one-piece motor housing together with a receiving space for electronic components.

Vor dem Hintergrund eines immer geringer zur Verfügung stehenden Bauraumes ist die Unterbringung und Montage einer derartigen Pumpe an gewünschten Montageplätzen nicht mehr oder nur schwer realisierbar. Es sollte deutlich sein, dass diese Nachteile auch bei elektrisch betriebenen Ölpumpen sowie beispielsweise bei Verdichtern und Gebläsen auftreten können.Against the background of an ever smaller amount of installation space available, it is no longer possible or difficult to accommodate and assemble such a pump at desired assembly locations. It should be clear that these disadvantages can also occur with electrically operated oil pumps and, for example, with compressors and fans.

Aufgabe der vorliegenden Erfindung ist es daher, die oben genannten Nachteile auf einfache und kostengünstige Weise zu vermeiden.It is therefore the object of the present invention to avoid the disadvantages mentioned above in a simple and inexpensive manner.

Diese Aufgabe wird dadurch gelöst, dass der Antriebsmotor einasymmetrisch permanent erregter Antriebsmotor ist, wobei der Motorstator und/oder die Motorspulenanordnung an dem Montagewandteil angeordnet ist und wobei die auf den Motorstator angeordnete Motorspulenanordnung auf einer, bezogen auf die Rotorwelle, abgewandten Seite von der Motorsteuerung vorgesehen ist. Durch eine derartige Ausführung wird kein abgeschlossener Motorsteuerungsraum mehr benötigt und zusätzlicher Platz für die Motorsteuerung im Motorraum ermöglicht, wodurch eine erhebliche Längenreduzierung und damit eine Bauraumeinsparung erreicht wird. Zudem kann eine Bauteileinsparung realisiert werden. Darüber hinaus wird die Flüssigkeitsführung zur Kühlung des Antriebsmotors und der Motorsteuerung wesentlich vereinfacht. Ein besonders platzsparender Antriebsmotor wird dadurch bereit gestellt, dass dieser als 1-phasiger asymmetrischer Antriebsmotor ausgebildet ist.This object is achieved in that the drive motor is an asymmetrically permanently excited drive motor, the motor stator and/or the motor coil arrangement being arranged on the mounting wall part and the motor coil arrangement arranged on the motor stator being provided on a side facing away from the motor controller in relation to the rotor shaft is. With such a design, a closed engine control room is no longer required and additional space is made possible for the engine control in the engine compartment, as a result of which a considerable reduction in length and thus a saving in installation space is achieved. In addition, a saving in components can be realized. In addition, the liquid flow for cooling the drive motor and the motor control is significantly simplified. A particularly space-saving drive motor is provided in that it is designed as a 1-phase, asymmetrical drive motor.

In einer besonders vorteilhaften Ausführungsform ist die Motorsteuerung über ein großflächiges Plattenelement, insbesondere eine Platine, aus einem wärmeleitenden Material auf dem Montagewandteil angeordnet. Hierdurch kann ein optimaler Wärmeübergang von der Motorsteuerung in das durch das Kühlfluid gekühlte Montagewandteil gewährleistet werden.In a particularly advantageous embodiment, the motor controller is arranged on the mounting wall part via a large-area plate element, in particular a circuit board, made of a heat-conducting material. In this way, an optimal heat transfer from the motor controller to the mounting wall part cooled by the cooling fluid can be ensured.

In besonders vorteilhafter Weise ist auf das Montagewandteil ein Deckelement als Teil des Motorgehäuses befestigt und somit ein abgeschlossenes Motorgehäuse ausgebildet. Es ist jedoch auch möglich den Motorraum offen im Kraftfahrzeug anzuordnen. Bei Vorliegen eines Deckelementes kann der Motorstator und/oder die Motorspulenanordnung an dem Deckelelement angeordnet sein, was Vorteile bei der Montage bieten kann.In a particularly advantageous manner, a cover element is fastened to the mounting wall part as part of the motor housing, and a closed motor housing is thus formed. However, it is also possible to arrange the engine compartment openly in the motor vehicle. If a cover element is present, the motor stator and/or the motor coil arrangement can be arranged on the cover element, which can offer advantages during assembly.

Auch ist es für die Wärmeableitung vorteilhaft, wenn der Motorstator und/oder die Motorspulenanordnung über ein wärmeleitendes Mittel, wie zum Beispiel ein Gap-Pad oder ein Vergußmittel, an dem Montageteil angeordnet ist. Des Weiteren kann die Rotorwelle über Lagermittel im Montagewandteil gelagert sein.It is also advantageous for heat dissipation if the motor stator and/or the motor coil arrangement is arranged on the assembly part via a heat-conducting means, such as a gap pad or a casting agent. Furthermore, the rotor shaft can be mounted in the mounting wall part via bearing means.

In vorteilhafter Weise weist das Montagewandteil zumindest ein achsparallel zur Rotorwelle verlaufendes Absatzelement auf, auf dem der Motorstator über Befestigungsmittel befestigt ist. Hierdurch wird eine besonders kompakte Anordnung gewährleistet, wobei auf einfache Weise eine Koaxialität der Rotorwelle und damit des Motorrotors zum Motorstator erreicht wird.The mounting wall part advantageously has at least one shoulder element which runs axially parallel to the rotor shaft and on which the motor stator is fastened by means of fastening means. This ensures a particularly compact arrangement, with the rotor shaft and thus the motor rotor being coaxial with the motor stator in a simple manner.

In vorteilhafter Weise ist ein Lagerorgan für einen Spalttopf vorgesehen, auf dem sich der Spalttopf abdichtend abstützt, so dass ein Motorrotorraum als Kühlmittel führender Raum geschaffen wird. An dem Spalttopf und/oder dem Motorstator kann ein Topfendelement abdichtend vorgesehen sein. Hierbei kann das Topfendelement jedoch auch integraler Bestandteil des Spalttopfes sein. In dem Topfendelement können dann weitere Lagermittel für die Rotorwelle vorgesehen sein.Advantageously, a bearing element is provided for a containment shell, on which the containment shell is supported in a sealing manner, so that a motor rotor space is created as a space that carries coolant. A pot end element can be provided in a sealing manner on the can and/or the motor stator. Here, however, the pot end element can also be an integral part of the split pot. Further bearing means for the rotor shaft can then be provided in the pot-end element.

In besonders vorteilhafter Welse ist ein im Bereich des Motorrotors, insbesondere im Bereich der Außenseite des Spalttopfes oder in diesen integrierter, berührungsloser Sensor, insbesondere ein Hall-Sensor, vorgesehen.In a particularly advantageous way, a non-contact sensor, in particular a Hall sensor, is provided in the area of the motor rotor, in particular in the area of the outside of the containment shell or integrated into it.

Die Erfindung wird nachfolgend anhand einer Zeichnung näher erläutert, hierbei zeigt:

  • Figur 1 eine geschnittene Seitenansicht einer erfindungsgemäßen Fluidpumpe,
  • Figur 2 eine geschnittene Endansicht der elektrischen Fluidpumpe aus Figur 1, und
  • Figur 3 eine perspektivische Ansicht eines Motorraumes eines Montagewandteils der erfindungsgemäßen Fluidpumpe.
The invention is explained in more detail below with reference to a drawing, which shows:
  • figure 1 a sectional side view of a fluid pump according to the invention,
  • figure 2 Figure 12 shows a sectional end view of the electric fluid pump figure 1 , and
  • figure 3 a perspective view of a motor compartment of a mounting wall part of the fluid pump according to the invention.

Figur 1 zeigt in einer geschnittenen Seitenansicht eine erfindungsgemäße elektrische Fluidpumpe 2, die als Kühlmittelpumpe ausgebildet ist, für ein nicht weiter dargestelltes Kraftfahrzeug. Es sollte deutlich sein, dass die Erfindung hierbei nicht auf eine derartige Kühlmittelpumpe beschränkt ist. Vielmehr fallen alle elektrischen Pumpen und Gebläse in den Bereich der Erfindung. Die elektrische Kühlmittelpumpe 2 weist einen Gehäuseverbund 4 auf, der einen Pumpenraum 6 für ein Pumpenaggregat 7 und einen Motorraum 8 definiert. Der Pumpenraum 6 weißt hierbei auf bekannte Weise einen Pumpenrotorraum 10 auf, in dem ein Pumpenrotor 12 vorgesehen ist und wird im vorliegenden Ausführungsbeispiel durch ein Pumpengehäuse 13 ausgebildet. Des Weiteren besitzt das Pumpengehäuse 13 auf bekannte Weise einen Einlass 14 sowie einen in Figur 2 dargestellten Auslass 16. Der Pumpenraum 6 und der Motorraum 8 werden durch eine gemeinsame Stirnwand 18 begrenzt. Im vorliegenden Ausführungsbeispiel ist zudem ein Deckelelement 20 vorgesehen, das auf der gemeinsamen Stirnwand 18 befestigt ist und somit ein Motorgehäuse 22 bildet mit einem geschlossenen Motorraum 8, in dem ein Antriebsmotor 24 und eine Motorsteuerung 26 vorgesehen sind. Es ist jedoch auch denkbar das Deckelement wegzulassen und somit einen offenen Motorraum 8 auszubilden. figure 1 shows a sectional side view of an electric fluid pump 2 according to the invention, which is designed as a coolant pump, for a motor vehicle not shown in detail. It should be clear that the invention is not limited to such a coolant pump. Rather, all electric pumps and blowers fall within the scope of the invention. The electric coolant pump 2 has a housing assembly 4 which defines a pump chamber 6 for a pump assembly 7 and a motor chamber 8 . The pump chamber 6 has a pump rotor chamber 10 in a known manner, in which a pump rotor 12 is provided and is formed by a pump housing 13 in the present exemplary embodiment. Furthermore, the pump housing 13 has, in a known manner, an inlet 14 and an in figure 2 outlet 16 shown. The pump chamber 6 and the motor chamber 8 are delimited by a common end wall 18 . In the present exemplary embodiment, a cover element 20 is also provided, which is fastened to the common end wall 18 and thus forms a motor housing 22 with a closed motor compartment 8 in which a drive motor 24 and a motor controller 26 are provided. However, it is also conceivable to omit the cover element and thus form an open engine compartment 8 .

Der Antriebsmotor 24 ist als asymmetrisch permanent erregter Antriebsmotor ausgebildet, wobei eine auf einem Motorstator 28 angeordnete Motorspulenanordnung 30 auf einer, bezogen auf eine Rotorwelle 32 abgewandten Seite von der Motorsteuerung 26 vorgesehen ist. Auf bekannte Weise ist ein Motorrotor 34 drehfest auf der Rotorwelle 32 angeordnet. Ebenfalls drehfest auf der Rotorwelle 32 ist der Pumpenrotor 12 befestigt. Der Motorstator 28 ist hierbei auf bekannte Weise als Blechpaket ausgeführt.The drive motor 24 is designed as an asymmetrically permanently excited drive motor, with a motor coil arrangement 30 arranged on a motor stator 28 being based on one Rotor shaft 32 is provided on the side facing away from the motor controller 26 . In a known manner, a motor rotor 34 is arranged on the rotor shaft 32 in a rotationally fixed manner. The pump rotor 12 is likewise fastened in a rotationally fixed manner on the rotor shaft 32 . The motor stator 28 is designed here in a known manner as a laminated core.

Erfindungsgemäß ist nun vorgesehen, dass die gemeinsame Stirnwand als Montagewandteil ausgebildet ist, auf der im vorliegenden Ausführungsbeispiel die Motorsteuerung 26 und der Motorstator 28 angeordnet sind. Die Motorspulenanordnung 30 liegt hierbei über ein Vergußmittel 36 an dem Montagewandteil 18 an und kann somit auf einfache Weise gekühlt werden. Die Motorsteuerung 26 ist hingegen auf einer großflächigen Platine 38 vorgesehen, die wiederum auf dem Montagewandteil 18 befestigt ist. Aufgrund der großflächigen dünnen Platine 38 findet ein optimaler Wärmeübergang von der Motorsteuerung 26 in das durch das Kühlfluid gekühlte Montagewandteil 18 statt.According to the invention, it is now provided that the common end wall is designed as a mounting wall part, on which the motor controller 26 and the motor stator 28 are arranged in the present exemplary embodiment. The motor coil arrangement 30 bears against the mounting wall part 18 via a casting agent 36 and can thus be cooled in a simple manner. The motor controller 26 , on the other hand, is provided on a large-area circuit board 38 , which in turn is fastened to the mounting wall part 18 . Due to the large-area thin circuit board 38 there is an optimal heat transfer from the engine control 26 to the mounting wall part 18 cooled by the cooling fluid.

Das Montagewandteil 18 weist zudem ein Lagerorgan 40 auf, an dessen Innenseite sich ein Spalttopf 42 mit einem integrierten Topfendelement 44 über Dichtmittel 46 abgedichtet abstützt. Ein so begrenzter Motorrotorraum 48 kann also von Kühlfluid durchströmt werden.The mounting wall part 18 also has a bearing element 40 on the inside of which a containment shell 42 with an integrated pot end element 44 is supported in a sealed manner via sealing means 46 . A motor rotor space 48 that is delimited in this way can therefore be flowed through by cooling fluid.

Der als Statorpaket ausgebildete Motorstator 28 ist auf achsparallel verlaufenden Absatzelementen 58 über Schrauben 60 am Montagewandteil 18 angeordnet (siehe hierzu Figur 3).The motor stator 28 designed as a stator assembly is arranged on shoulder elements 58 running parallel to the axis via screws 60 on the mounting wall part 18 (see figure 3 ).

Die durch das Montagewandteil 18 hindurch reichende Rotorwelle 32 ist über geeignete Lagermittel 50, 52 im Topfendelement 42 und im Montagewandteil 18 gelagert. In Figur 2 lediglich schematisch und in Figur 3 genauer dargestellt, ist ein als Hallsensor ausgebildeter berührungsloser Sensor 54, der auf bekannte Weise eine Drehstellung des Antriebsmotors 24 überwacht und der im Spalttopf 42 integriert im Bereich einer Pollücke des Motorstators 28 angeordnet ist.The rotor shaft 32 extending through the mounting wall part 18 is mounted in the pot end element 42 and in the mounting wall part 18 via suitable bearing means 50 , 52 . In figure 2 only schematically and in figure 3 shown in more detail is a non-contact sensor 54 designed as a Hall sensor, which in a known manner indicates a rotational position of the drive motor 24 is monitored and integrated into the can 42 in the area of a pole gap of the motor stator 28 .

Figur 2 zeigt nun in einer geschnittenen Endansicht die elektrische Fluidpumpe 2 aus Figur 1. Deutlich zu erkennen ist hier der als Statorpaket ausgebildete Motorstator 28, der Öffnungen 56 aufweist, durch die die in Figur 3 dargestellten Schrauben 60 geführt werden können, um das Statorpaket 28 an den zylindrischen Absatzelementen 58 des Montagewandteils 18 zu befestigen. Wie hier deutlich zu erkennen ist, weist der Motorstator 28 eine rechteckige Statorgeometrie auf, wodurch eine Reduzierung der Blechherstellungskosten möglich ist. Des Weiteren ist durch die erfindungsgemäße Anordnung eine Vereinfachung der Elektronik möglich und ein einfacher Prozessor durch den Einsatz des Hallsensors 54 möglich. figure 2 now shows the electric fluid pump 2 in a sectional end view figure 1 . Motor stator 28, which is designed as a stator core and has openings 56 through which the in figure 3 Screws 60 shown can be guided to attach the stator core 28 to the cylindrical shoulder elements 58 of the mounting wall part 18. As can be clearly seen here, the motor stator 28 has a rectangular stator geometry, which makes it possible to reduce sheet metal production costs. Furthermore, the arrangement according to the invention enables the electronics to be simplified and a simpler processor to be used by using the Hall sensor 54 .

Claims (11)

  1. Electric fluid pump for a motor vehicle, comprising a housing composite (4), which defines at least a pump space (6) and a motor space (8), wherein the pump space (6) has a pump rotor space (10) for a pump unit (7) having a pump rotor (12) and wherein a drive motor (24) having a motor stator (28) having a motor coil assembly and a motor rotor is provided in the motor space (8), wherein the pump space (6) and the motor space (8) have a common end wall (18), wherein the motor rotor (34) is connected to a rotor shaft (32) for conjoint rotation, which rotor shaft is fed through the common end wall (18) and on which rotor shaft the pump rotor (12) is arranged for conjoint rotation, and wherein a motor controller (26) is provided for controlling the drive motor (24), wherein the common end wall (18) is designed as a mounting wall part, on which at least the motor controller (26) is arranged in a thermally conductive manner, characterized in that the drive motor (24) is an asymmetric permanently excited drive motor, wherein the motor stator (28) and/or the motor coil assembly (30) are provided at the mounting wall part (18), and wherein the motor coil assembly (30) arranged on the motor stator (28) is provided on a side which, in relation to the rotor shaft (32), is opposite the motor controller (26).
  2. Electric fluid pump of claim 1, characterized in that the motor control (26) is arranged on the mounting wall part (18) via a large-surface plate element (38), in particular a circuit board, of a thermally conductive material.
  3. Electric fluid pump of one of the preceding claims, characterized in that a cover element (20) is fastened on the mounting wall part (1) as a part of the motor housing (8).
  4. Electric fluid pump of claim 3, characterized in that the motor stator (28) and/or the motor coil arrangement (30) are arranged on the cover element (20).
  5. Electric fluid pump of one of the preceding claims, characterized in that the motor stator (28) and/or the motor coil arrangement (30) are arranged on the mounting wall part (18) by a thermally conductive (36), such as e.g. a gap pad or a potting material.
  6. Electric fluid pump of one of the preceding claims, characterized in that the rotor shaft (32) is supported in the mounting wall part (18) via bearing means (50).
  7. Electric fluid pump of one of the preceding claims, characterized in that the mounting wall part (18) comprises at least one shoulder element (58) extending axially parallel to the rotor shaft (32), on which element the motor stator (28) is fastened via fastening means.
  8. Electric fluid pump of one of the preceding claims, characterized in that a bearing member (40) for a can (42) is provided on which the can (42) is supported in a sealing manner.
  9. Electric fluid pump of claim 8, characterized in that a pot end element (44) is provided in a sealing manner on the can (42) and/or the motor stator (26).
  10. Electric fluid pump of claim 9, characterized in that further bearing means (50) for the rotor shaft (32) are provided in the pot end element (44).
  11. Electric fluid pump of one of the preceding claims, characterized in that a contactless sensor (54), in particular a Hall sensor, is provided in the region of the motor rotor, in particular in the region of the outer side of the can (42) or is integrated in the same.
EP16729946.0A 2016-06-20 2016-06-20 Electric fluid pump for a motor vehicle Active EP3472470B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/064201 WO2017220119A1 (en) 2016-06-20 2016-06-20 Electric fluid pump for a motor vehicle

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EP3472470A1 EP3472470A1 (en) 2019-04-24
EP3472470B1 true EP3472470B1 (en) 2022-03-02

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US (1) US10935028B2 (en)
EP (1) EP3472470B1 (en)
JP (1) JP2019515628A (en)
CN (1) CN109154302A (en)
WO (1) WO2017220119A1 (en)

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US20200309136A1 (en) 2020-10-01
US10935028B2 (en) 2021-03-02
JP2019515628A (en) 2019-06-06
WO2017220119A1 (en) 2017-12-28
EP3472470A1 (en) 2019-04-24
CN109154302A (en) 2019-01-04

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