EP3289221B1 - Fluid pump - Google Patents

Fluid pump Download PDF

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Publication number
EP3289221B1
EP3289221B1 EP16719085.9A EP16719085A EP3289221B1 EP 3289221 B1 EP3289221 B1 EP 3289221B1 EP 16719085 A EP16719085 A EP 16719085A EP 3289221 B1 EP3289221 B1 EP 3289221B1
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EP
European Patent Office
Prior art keywords
rotor
pump
combination
stator
fluid
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EP16719085.9A
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German (de)
French (fr)
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EP3289221A1 (en
Inventor
Nils BORNEMANN
Stefan TILLER
Antonio Casellas
Ümit Aydin
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.)
GKN Powder Metallurgy Engineering GmbH
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GKN Sinter Metals Engineering GmbH
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Publication of EP3289221A1 publication Critical patent/EP3289221A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/008—Prime movers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/40—Electric motor

Definitions

  • the present invention relates to a fluid pump which is driven by an electric motor, a pump rotor being coupled to the electric motor.
  • WO 2006/021616 A1 is an electric machine with an axial electric motor.
  • a rotor of the electric machine is arranged between two laterally arranged stators and has guide elements along its circumference that are embedded in a non-ferromagnetic material of the rotor.
  • the object of the present invention is to provide a particularly leak-proof fluid machine that can safely transport different media, in particular aggressive media.
  • a fluid pump is proposed, driven by an electric motor which is coupled to a pump rotor of the fluid pump, the electric motor being an axial flux electric motor, the electric motor rotor of which is also the pump rotor and the pump rotor and the electric motor rotor housed in a common housing are, in which the pump rotor and the electric motor rotor rotates integrated like a disk as a combination rotor, the common housing having a fluid inlet and a fluid outlet to the combination rotor.
  • a pump chamber and magnets of the electric motor that are axially aligned to the axis of rotation are arranged. This allows the formation of field lines in the axial direction, so that a torque can be impressed on the combination rotor.
  • a multiplicity of axially aligned magnets are distributed along a circumference of the combination rotor in the combination rotor.
  • the magnets can be close to or close to an outer circumference be arranged on an inner circumference of the combination rotor.
  • soft magnetic elements can also be used. Therefore, if magnets are used in the following, the relevant explanations also apply to the use of soft magnetic elements, such as those used in a reluctance motor, for example.
  • the magnets or soft magnetic elements can have different geometries. They can be shaped as cylindrical disks, as pie-shaped sections or in any other geometry. These can also result in a closed ring which forms part of the combination rotor.
  • At least one stator of the electric motor is arranged at the end of the combination rotor, cores of the stator aligned axially parallel to the rotor axis of rotation having at least in part a soft magnetic material.
  • a multiplicity of cores, preferably at least five cores, are arranged in an axially aligned manner distributed around the circumference.
  • a first stator of the axial flux motor frames the combination rotor on a first end face and a second stator of the axial flux motor frames the combination rotor on a second end face of the common housing opposite the first end face.
  • a further development (not according to the invention) provides that cores of the first stator and of the second stator lie exactly opposite one another, axially parallel to the rotor axis of rotation.
  • This arrangement has the advantage, for example, of the direct amplification of the respective acting electromagnetic forces.
  • An embodiment according to the invention provides that the cores of the first stator and the second stator are offset from one another, axially parallel to the rotor axis of rotation. In this way, for example, field lines distributed axially around the circumference can be generated.
  • the common housing has an amagnetic material at least in an area between the rotating combination rotor and the cores of the stator. As a result, the necessary formation of the electromagnetic field for generating a torque on the combination rotor is not or only slightly disturbed.
  • a pump chamber is closed off in the common housing and a fluid inflow and / or a fluid outflow to the pump chamber is preferably carried out axially along the axis of rotation, particularly preferably by the electric motor.
  • the combination rotor has a co-rotating pump wheel, a shaft of the combination rotor being arranged and mounted within the common housing.
  • the combination rotor rotates about an axis of rotation in the common housing, a co-rotating pump wheel being seated on the axis of rotation.
  • the combination rotor and the pump wheel can have the same axis of rotation or each use different axes of rotation arranged parallel to one another.
  • Another embodiment again provides that a first and a second end of the shaft or the axis of rotation of the combination rotor each end in the common housing.
  • the common housing preferably has only static seals, but no seal due to a relative movement between a fixed part of the common housing and a component that is moved outward and moved for it. Rather, a component that is movable relative to the common housing, such as a shaft, can be dispensed with.
  • An axle for the combination rotor can, for example, be guided out of the common housing on at least one side. If an aggressive fluid is to be conveyed by means of the fluid pump, for example dispensing with a dynamically stressed seal allows a longer service life of the fluid pump.
  • a further development of the method provides that the cores of the stator are pressed and manufactured from a soft magnetic material.
  • the common housing is also produced by means of a cup-shaped first component and a side cover to be attached to it as the second component.
  • a bearing for a shaft of the combination rotor can be provided in a base of the first component, the counterpart of which is arranged, for example, in the side cover.
  • Axial bearings, but also axial / radial bearings, in particular roller bearings, can preferably be used. It is preferred to use bearings that have been lubricated for life.
  • Fig. 1 shows a first view of a fluid pump 1 in an assembled state.
  • An inner housing 2 is connected to a first and a second side cover 3, 4, preferably connected releasably in a repeatable manner. This can be done, for example, by screwing through holes 5. These are distributed around the circumference, which enables a pump chamber in the inner housing 2 to be sealed off.
  • the first and the second side covers 3, 4 have stator cores 6 which are each aligned axially with respect to a rotor axis in the interior of the inner housing 2.
  • the stator cores 6 are each wound with a winding so that an electromagnetic field can be generated.
  • a circuit board can be arranged on a cover 7, by means of which the respective windings can be interconnected and controlled.
  • a liquid can be fed centrally via a feed as a fluid inflow 8.
  • a fluid is supplied or discharged from the side.
  • Fig. 2 shows in an exemplary embodiment an inner housing 2 with an internally arranged Combination rotor 9.
  • the combination rotor rotates in the inner housing 2.
  • the combination rotor 9 can have recesses 10 into which, for example, magnets or soft magnetic elements can be inserted.
  • a pump chamber 11 is located in an interior of the combination rotor 9.
  • a gerotor 12 is located in the pump chamber.
  • a gerotor instead of a gerotor as a fluid pump, an impeller pump, a vane pump, a P-rotor, a roller cell pump, a rotary vane pump or a radial piston pump can also be used in the inner housing 2 be arranged.
  • the respective pump wheel can either be part of the combination rotor or, as in the gerotor shown, be arranged on an axis and therefore also rotate.
  • permanent magnets as an axial flux electric motor, a permanently excited synchronous or brushless direct current motor, abbreviated BLDC, can be formed, while, for example, a reluctance motor can be created as an electric motor in an axial design using soft magnetic elements.
  • a stator which is arranged here because of its position on the back of the inner housing 2 shown, can have a soft magnetic material, for example a soft magnetic composite, abbreviated to SMC, or a combination of electrical steel sheets and SMC.
  • FIG. 11 shows a sectional view of the fluid pump 1 from FIG Fig. 1 in a sectional view.
  • the inner housing 2 together with the respective first and second side covers 3, 4 form a sealed, common housing 14 in which a pump wheel is driven by means of the combination rotor 9.
  • the illustration shows the disk-like geometry of the combination rotor 9.
  • the common housing 14 has the axially arranged fluid inflow 8 and a fluid outflow 15 arranged axially opposite.
  • the fluid inflow 8 can lead a fluid to the pump wheel, in this case to the gerotor, by means of a lateral recess in the second side cover.
  • the fluid outflow 15 can open into the pump space opposite or, as in the case of some types of pumps, offset for this purpose. Radial fluid guidance is also possible.
  • Fig. 4 shows the second side cover 4 from Fig. 1 with attached connection piece 16 from a side perspective.
  • the connecting pieces 16 allow, for example, the screwing or fastening of the axial pump formed in this way in an installation space, for example a car engine compartment.
  • Fig. 5 shows the second side cover 4 from Fig. 1 in another perspective.
  • Two orifices 17 are shown, through which fluid can flow to and from the pump chamber.
  • At least one non-magnetic material is provided as the material in a region of the side cover which is opposite the stator cores (not shown).
  • the area that is swept over by the combination rotor is made of non-magnetic material.
  • the non-magnetic material is preferably also electrically non-conductive.
  • an amagnetic metal can also be used.
  • the side cover can be manufactured, for example, as an injection-molded part or as a sintered component. Different materials can also be used.
  • One embodiment provides that the side cover 4 is produced together with the stator cores.
  • a sintering process can be used, for example from the DE 10 2009 042 598 A1 and the JP H08-134509 A is apparent, to which reference is made in this regard in the context of the disclosure. While from the DE 10 2009 042 598 A1 and the JP H08-134509 A shows how, for example, the same or different sintered materials can be produced with one another, goes from the DE 10 2009 042 603 A1 shows how prefabricated components can be precisely incorporated into a component to be sintered.
  • stator with, for example, prefabricated stator cores made of, for example, sintered material, as well as when using electrical steel sheets as soft magnetic elements in the combination rotor to manufacture a reluctance motor.
  • Magnets can also be introduced in this way, whereby these are preferably only inserted after sintering due to the temperatures during sintering.
  • Fig. 6 shows in an exemplary embodiment a second version of a further, third side cover 18.
  • the third side cover 18 has, for example, soft magnetic poles 19, which are preferably made from soft magnetic composites. For example, as shown, these can extend to a surface and thus also form a border of the inner housing.
  • soft magnetic poles 19 which are preferably made from soft magnetic composites.
  • these can extend to a surface and thus also form a border of the inner housing.
  • Such a structure has the advantage that the side cover can otherwise be made from non-magnetic metal, for example from metallic powder by means of a sintering process.
  • the proposed fluid pump can be used in different areas of application get used. Liquids of the most varied types such as Newtonian fluids or Bingham fluids as well as gases can be transported. The use can include a wide variety of areas such as the chemical industry, the food industry, use in machines and systems or in the vehicle, aircraft and shipping sectors.
  • the fluids can include alkalis or acids, have a corrosive effect, be cooled or heated.
  • Oil pump in an internal combustion engine Circulation pump, for example in a cooling circuit or in the heating area; as a circulation pump, for example in drinking water systems; Lubricant pump; as a hydraulic clutch actuator; in fuel delivery; in the case of the injection system in the area of the common rail in the case of gasoline or diesel direct injection; as an air conditioning compressor; as a vacuum pump; as a servo pump, for example in the area of power steering assistance; in the brake booster; in transmissions, in particular automatic transmissions, for example for cooling, for maintaining a pressure, as a suction pump; in the field of aquariums; with PC and server cooling such as water cooling; in medical technology, for example in a dialysis machine, an infusion pump, an insulin pump; in exhaust gas aftertreatment, for example when adding urea; as a vent pump; with brake boosters, when filling pneumatic actuators; with active trolleys; in windshield and headlight cleaning systems; in washing facilities; as a submersible pump; as a drive

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Die vorliegende Erfindung betrifft eine Fluidpumpe, die mit einem Elektromotor angetrieben wird, wobei ein Pumpenrotor mit dem Elektromotor gekoppelt ist.The present invention relates to a fluid pump which is driven by an electric motor, a pump rotor being coupled to the electric motor.

Aus der WO 2006/021616 A1 ist eine Elektromaschine mit einem axialen Elektromotor hervorgehend. Zwischen zwei jeweils seitlich angeordneten Statoren ist ein Rotor der Elektromaschine angeordnet, der entlang seines Umfangs Leitelemente aufweist, die in einem nicht-ferromagnetischen Material des Rotors eingebettet sind.From the WO 2006/021616 A1 is an electric machine with an axial electric motor. A rotor of the electric machine is arranged between two laterally arranged stators and has guide elements along its circumference that are embedded in a non-ferromagnetic material of the rotor.

Aus derFrom the US H1966 HUS H1966 H ist ein Axialflussmotor mit zwei Statoren und einem dazwischen angeordneten Rotor bekannt, wobei innerhalb des Rotors ein Zahnrad einer Pumpe angeordnet ist.an axial flux motor with two stators and a rotor arranged between them is known, a gear wheel of a pump being arranged inside the rotor.

Aus derFrom the US 5,145,329 AU.S. 5,145,329 A ist ein Axialflussmotor mit zwei Statoren und einem dazwischen angeordneten Rotor bekannt, wobei innerhalb des Rotors eine Zahnradpaarung einer Gerotor-Pumpe angeordnet ist.an axial flux motor with two stators and a rotor arranged between them is known, a gear pair of a gerotor pump being arranged inside the rotor.

Aufgabe der vorliegenden Erfindung ist es, eine besonders dichte Fluidmaschine zur Verfügung zu stellen, die unterschiedliche Medien, insbesondere auch aggressive Medien sicher transportieren kann.The object of the present invention is to provide a particularly leak-proof fluid machine that can safely transport different media, in particular aggressive media.

Diese Aufgabe wird mit einer Fluidpumpe mit den Merkmalen des Anspruchs 1 und mit einem Verfahren mit den Merkmalen des Anspruchs 13 gelöst. Vorteilhafte Weiterbildungen und Ausgestaltungen gehen aus den nachfolgenden Unteransprüchen, Beschreibung und Figuren hervor. Die einzelnen Merkmale einzelner Ausgestaltungen sind jedoch nicht auf diese beschränkt. Vielmehr können ein oder mehrerer Merkmale aus ein oder mehreren Ausgestaltungen mit ein oder mehreren Merkmalen einer anderen Ausgestaltung verknüpft werden. Des Weiteren ist die Formulierung der beiden unabhängigen Ansprüche jeweils ein erster Versuch, den Erfindungsgegenstand zu beschreiben. Die Erfindung selbst geht aus der gesamten Offenbarung hervor, weswegen auch ein oder mehrere Merkmale der unabhängigen Ansprüche ergänzt, ersetzt oder auch gestrichen werden können.This object is achieved with a fluid pump with the features of claim 1 and with a method with the features of claim 13. Advantageous further developments and refinements emerge from the following subclaims, description and figures. The individual characteristics of each However, configurations are not limited to these. Rather, one or more features from one or more configurations can be linked to one or more features of another configuration. Furthermore, the formulation of the two independent claims is each a first attempt to describe the subject matter of the invention. The invention itself emerges from the entire disclosure, which is why one or more features of the independent claims can also be supplemented, replaced or even deleted.

Es wird eine Fluidpumpe vorgeschlagen, angetrieben mit einem Elektromotor, der mit einem Pumpenrotor der Fluidpumpe gekoppelt ist, wobei der Elektromotor ein Axialfluss-Elektromotor ist, dessen Elektromotor-Rotor auch der Pumpenrotor ist und der Pumpenrotor und der Elektromotor-Rotor in einem gemeinsamen Gehäuse untergebracht sind, in dem der Pumpenrotor und der Elektromotor-Rotor scheibenformartig als Kombinationsrotor integriert sich dreht, wobei das gemeinsame Gehäuse einen Fluidzu- und einen Fluidabfluss zu dem Kombinationsrotor aufweist.A fluid pump is proposed, driven by an electric motor which is coupled to a pump rotor of the fluid pump, the electric motor being an axial flux electric motor, the electric motor rotor of which is also the pump rotor and the pump rotor and the electric motor rotor housed in a common housing are, in which the pump rotor and the electric motor rotor rotates integrated like a disk as a combination rotor, the common housing having a fluid inlet and a fluid outlet to the combination rotor.

Gemäß einer Weiterbildung ist vorgesehen, dass ausgehend von einer Drehachse des Kombinationsrotors, in einer radialen Richtung betrachtet, ein Pumpenraum und axial zur Drehachse ausgerichtete Magnete des Elektromotors angeordnet sind. Dieses erlaubt das Ausbilden von Feldlinien in axialer Richtung, so dass ein Drehmoment auf den Kombinationsrotor aufgeprägt werden kann.According to a further development, it is provided that starting from an axis of rotation of the combination rotor, viewed in a radial direction, a pump chamber and magnets of the electric motor that are axially aligned to the axis of rotation are arranged. This allows the formation of field lines in the axial direction, so that a torque can be impressed on the combination rotor.

Eine Ausgestaltung sieht vor, dass im Kombinationsrotor eine Vielzahl an axial ausgerichteten Magneten entlang eines Umfangs des Kombinationsrotors verteilt sind. Die Magnete können hierbei nahe an einem Außenumfang oder auch nahe an einem Innenumfang des Kombinationsrotors angeordnet sein. Alternativ zu den Magneten können auch weichmagnetische Elemente zum Einsatz kommen. Wird daher im Folgenden von Magneten gesprochen, gelten die diesbezüglichen Ausführungen ebenso für die Nutzung von weichmagnetischen Elementen, wie sie zum Beispiel bei einem Reluktanzmotor eingesetzt werden. Die Magnete bzw. weichmagnetischen Elemente können unterschiedliche Geometrien aufweisen. Sie können als zylindrische Scheiben geformt sein, als Kuchenteil-förmige Abschnitte oder in sonstiger Geometrie. Auch können diese einen geschlossenen Ring ergeben, der einen Teil des Kombinationsrotors bildet.One embodiment provides that a multiplicity of axially aligned magnets are distributed along a circumference of the combination rotor in the combination rotor. The magnets can be close to or close to an outer circumference be arranged on an inner circumference of the combination rotor. As an alternative to the magnets, soft magnetic elements can also be used. Therefore, if magnets are used in the following, the relevant explanations also apply to the use of soft magnetic elements, such as those used in a reluctance motor, for example. The magnets or soft magnetic elements can have different geometries. They can be shaped as cylindrical disks, as pie-shaped sections or in any other geometry. These can also result in a closed ring which forms part of the combination rotor.

Beispielswiese ist vorgesehen, dass zumindest ein Stator des Elektromotors stirnseitig zu dem Kombinationsrotor angeordnet ist, wobei zur Rotordrehachse achsparallel ausgerichtete Kerne des Stators zumindest zum Teil ein weichmagnetisches Material aufweisen. Eine Vielzahl an Kernen, bevorzugt mindestens fünf Kerne, sind um den Umfang verteilt axial ausgerichtet angeordnet.For example, it is provided that at least one stator of the electric motor is arranged at the end of the combination rotor, cores of the stator aligned axially parallel to the rotor axis of rotation having at least in part a soft magnetic material. A multiplicity of cores, preferably at least five cores, are arranged in an axially aligned manner distributed around the circumference.

Erfindungsgemäß ist es, dass ein erster Stator des Axialflussmotors den Kombinationsrotor an einer ersten Stirnseite und ein zweiter Stator des Axialflussmotors den Kombinationsrotor an einer zur ersten Stirnseite entgegengesetzten zweiten Stirnseite des gemeinsamen Gehäuses einrahmen. Dieses erlaubt einerseits eine besonders kompakte Bauform. Zum anderen erlaubt dieses auch die Erzeugung eines stärkeren Drehmoments. According to the invention , a first stator of the axial flux motor frames the combination rotor on a first end face and a second stator of the axial flux motor frames the combination rotor on a second end face of the common housing opposite the first end face. On the one hand, this allows a particularly compact design. On the other hand, this also allows a stronger torque to be generated.

Eine (nicht erfindungsgemäße) Weiterbildung sieht vor, dass Kerne des ersten Stators und des zweiten Stators einander achsparallel zur Rotordrehachse genau gegenüber liegen. Diese Anordnung hat zum Beispiel den Vorteil der direkten Verstärkung der jeweiligen wirkenden elektromagnetischen Kräfte.A further development (not according to the invention) provides that cores of the first stator and of the second stator lie exactly opposite one another, axially parallel to the rotor axis of rotation. This arrangement has the advantage, for example, of the direct amplification of the respective acting electromagnetic forces.

Eine erfindungsgemäße Ausgestaltung sieht vor, dass Kerne des ersten Stators und des zweiten Stators versetzt zueinander achsparallel zur Rotordrehachse gegenüber liegen. Auf diese Weise können zum Beispiel breiter axial um den Umfang verteilte Feldlinien erzeugt werden. An embodiment according to the invention provides that the cores of the first stator and the second stator are offset from one another, axially parallel to the rotor axis of rotation. In this way, for example, field lines distributed axially around the circumference can be generated.

Bevorzugt ist es, wenn das gemeinsame Gehäuse zumindest in einem Bereich zwischen dem rotierenden Kombinationsrotor und den Kernen des Stators ein amagnetisches Material aufweist. Dadurch wird die notwendige Ausbildung des elektromagnetischen Feldes zur Erzeugung eines Drehmoments am Kombinationsrotor nicht oder nur gering gestört.It is preferred if the common housing has an amagnetic material at least in an area between the rotating combination rotor and the cores of the stator. As a result, the necessary formation of the electromagnetic field for generating a torque on the combination rotor is not or only slightly disturbed.

Weiterhin ist es bevorzugt, dass ein Pumpenraum im gemeinsamen Gehäuse abgeschlossen ist und ein Fluidzu- und/oder ein Fluidabfluss zu dem Pumpenraum bevorzugt axial entlang der Rotationsachse erfolgt, insbesondere bevorzugt durch den Elektromotor erfolgt.Furthermore, it is preferred that a pump chamber is closed off in the common housing and a fluid inflow and / or a fluid outflow to the pump chamber is preferably carried out axially along the axis of rotation, particularly preferably by the electric motor.

Beispielsweise kann vorgesehen sein, dass der Kombinationsrotor ein mitdrehendes Pumpenrad aufweist, wobei eine Welle des Kombinationsrotors innerhalb des gemeinsamen Gehäuses angeordnet und gelagert ist.For example, it can be provided that the combination rotor has a co-rotating pump wheel, a shaft of the combination rotor being arranged and mounted within the common housing.

Eine Ausgestaltung sieht vor, dass der Kombinationsrotor sich um eine Drehachse in dem gemeinsamen Gehäuse dreht, wobei auf der Drehachse ein mitrotierendes Pumpenrad sitzt. Es können der Kombinationsrotor und das Pumpenrad die gleiche Drehachse aufweisen oder jeweils verschiedene, parallel zueinander angeordnete Drehachsen nutzen.One embodiment provides that the combination rotor rotates about an axis of rotation in the common housing, a co-rotating pump wheel being seated on the axis of rotation. The combination rotor and the pump wheel can have the same axis of rotation or each use different axes of rotation arranged parallel to one another.

Eine weitere Ausgestaltung sieht wiederum vor, dass ein erstes und ein zweites Ende der Welle bzw. der Drehachse des Kombinationsrotors jeweils in dem gemeinsamen Gehäuse enden.Another embodiment again provides that a first and a second end of the shaft or the axis of rotation of the combination rotor each end in the common housing.

Bevorzugt weist das gemeinsame Gehäuse nur statische Dichtungen auf, hingegen jedoch keine Dichtung aufgrund einer Relativbewegung zwischen einem feststehenden Teil des gemeinsamen Gehäuses und einem nach außen geführten, dazu bewegtem Bauteil. Vielmehr kann auf ein relativ zum gemeinsamen Gehäuse bewegliches Bauteil wie eine Welle verzichtet werden. Eine Achse für den Kombinationsrotor kann zum Beispiel zumindest an einer Seite aus dem gemeinsamen Gehäuse geführt werden. Soll ein aggressives Fluid mittels der Fluidpumpe gefördert werden, erlaubt zum Beispiel der Verzicht auf eine dynamisch beanspruchte Dichtung eine höhere Lebensdauer der Fluidpumpe.The common housing preferably has only static seals, but no seal due to a relative movement between a fixed part of the common housing and a component that is moved outward and moved for it. Rather, a component that is movable relative to the common housing, such as a shaft, can be dispensed with. An axle for the combination rotor can, for example, be guided out of the common housing on at least one side. If an aggressive fluid is to be conveyed by means of the fluid pump, for example dispensing with a dynamically stressed seal allows a longer service life of the fluid pump.

Gemäß einem weiteren Gedanken der Erfindung, der zusammen mit der oben wie auch nachfolgend beschriebenen Fluidpumpe zum Einsatz kommt, wird ein Verfahren zum Herstellen einer Fluidpumpe mit den folgenden Schritten vorgeschlagen:

  • Herstellen eines Kombinationsrotors als Pumpen- und ein Elektromotor-Rotor in Scheibenbauart mit axialem Anordnen von Magneten bzw. weichmagnetischen Elementen im Kombinationsrotor,
  • Einsetzen des Kombinationsrotors in einen Außenring,
  • Einsetzen einer Welle bzw. Achse,
  • seitliches Anbringen von zumindest einer Seitenwand an den Außenring zum fluiddichten Abdichten des Kombinationsrotors unter Aufnahme eines Endes der Welle bzw. Achse in die Seitenwand
  • seitliches Anbringen von zumindest einem Stator eines Elektromotors an die Seitenwand zum Antrieb des Kombinationsrotors in dem mittels zumindest Außenring und Seitenwand gebildeten gemeinsamen Gehäuses, wobei Kerne des Stators achsparallel zur Rotationsachse des Kombinationsrotors angeordnet werden.
According to a further concept of the invention, which is used together with the fluid pump described above and also below, a method for producing a fluid pump with the following steps is proposed:
  • Manufacture of a combination rotor as a pump and an electric motor rotor in disc design with axial arrangement of magnets or soft magnetic elements in the combination rotor,
  • Inserting the combination rotor into an outer ring,
  • Inserting a shaft or axle,
  • lateral attachment of at least one side wall to the outer ring for fluid-tight sealing of the combination rotor while accommodating one end of the shaft or axle in the side wall
  • Lateral attachment of at least one stator of an electric motor to the side wall for driving the combination rotor in the common housing formed by at least the outer ring and side wall, with cores of the stator being arranged axially parallel to the axis of rotation of the combination rotor.

Eine Weiterbildung des Verfahrens sieht vor, dass die Kerne des Stators aus einem weichmagnetischen Material verpresst und hergestellt werden.A further development of the method provides that the cores of the stator are pressed and manufactured from a soft magnetic material.

Es besteht die Möglichkeit, dass das gemeinsame Gehäuse auch mittels eines topfförmigen ersten Bauteils und einem darauf zu befestigendem Seitendeckel als zweitem Bauteil hergestellt wird. Dadurch kann in einem Boden des ersten Bauteils eine Lagerung für eine Welle des Kombinationsrotors vorgesehen, deren Gegenstück beispielsweise in dem Seitendeckel angeordnet ist. Vorzugsweise können Axiallager, aber auch Axial/Radiallager zum Einsatz kommen, insbesondere Wälzlager. Vorzugsweise werden Lager verwendet, die eine Lebensdauerschmierung aufweisen.There is the possibility that the common housing is also produced by means of a cup-shaped first component and a side cover to be attached to it as the second component. As a result, a bearing for a shaft of the combination rotor can be provided in a base of the first component, the counterpart of which is arranged, for example, in the side cover. Axial bearings, but also axial / radial bearings, in particular roller bearings, can preferably be used. It is preferred to use bearings that have been lubricated for life.

Die nachfolgenden Figuren zeigen in beispielhafter Weise verschiedene Ausgestaltungen der Erfindung zur beispielhaften Darstellung, ohne dass damit die Erfindung beschränkt sein soll. Vielmehr können ein oder mehrere Merkmale aus einer Ausgestaltung mit anderen Merkmalen aus der Beschreibung wie auch aus den anderen Figuren zu weiteren Ausgestaltungen, auch nicht näher figürlich dargestellten Ausgestaltungen verknüpft werden. Es zeigen:

  • Fig. 1 eine beispielhafte Ausgestaltung einer Fluidpumpe,
  • Fig. 2 eine Innenansicht auf die Fluidpumpe aus Fig. 1,
  • Fig. 3 eine Schnittansicht der Fluidpumpe aus Fig. 1
  • Fig. 4 eine Schrägansicht auf einen Seitendeckel mit eingelassenen Anschlussstutzen,
  • Fig. 5 eine weitere Schrägansicht auf den Seitendeckel aus Fig. 4, und
  • Fig. 6 eine weitere Ausgestaltung einer Seitenabdeckung.
The following figures show, by way of example, various embodiments of the invention for illustrative purposes, without the invention being restricted thereby. Rather, one or more features from an embodiment can be linked to other features from the description as well as from the other figures to form further configurations, including configurations not shown in more detail. Show it:
  • Fig. 1 an exemplary embodiment of a fluid pump,
  • Fig. 2 an interior view of the fluid pump Fig. 1 ,
  • Fig. 3 a sectional view of the fluid pump Fig. 1
  • Fig. 4 an oblique view of a side cover with recessed connecting pieces,
  • Fig. 5 another oblique view of the side cover Fig. 4 , and
  • Fig. 6 another embodiment of a side cover.

Fig. 1 zeigt in einer ersten Ansicht eine Fluidpumpe 1 in einem zusammengebauten Zustand. Ein Innengehäuse 2 ist mit einem ersten und einem zweiten Seitendeckel 3, 4 verbunden, vorzugsweise wiederholbar lösbar verbunden. Dieses kann zum Beispiel mittels Verschraubung durch Löcher 5 erfolgen. Diese sind um den Umfang herum verteilt, wodurch eine Abdichtung einer Pumpenkammer im Innengehäuse 2 ermöglicht wird. Der erste und der zweite Seitendeckel 3, 4 weisen Statorkerne 6 auf, die jeweils axial verlaufend zu einer Rotorachse im Inneren des Innengehäuses 2 ausgerichtet sind. Die Statorkerne 6 sind jeweils umwickelt mit einer Wicklung, so dass ein elektromagnetisches Feld erzeugt werden kann. Hierzu ist beispielsweise eine Platine auf einer Abdeckung 7 anordbar, mittels der eine Verschaltung der jeweiligen Wicklungen und Ansteuerung derselben ermöglicht wird. Über die Abdeckung 7 kann zentral zum Beispiel eine Flüssigkeit über eine Zuführung als Fluidzufluss 8 zentral zugeführt werden. Es besteht aber ebenfalls die Möglichkeit, dass ein Fluid seitlich zu- bzw. abgeführt wird. Fig. 1 shows a first view of a fluid pump 1 in an assembled state. An inner housing 2 is connected to a first and a second side cover 3, 4, preferably connected releasably in a repeatable manner. This can be done, for example, by screwing through holes 5. These are distributed around the circumference, which enables a pump chamber in the inner housing 2 to be sealed off. The first and the second side covers 3, 4 have stator cores 6 which are each aligned axially with respect to a rotor axis in the interior of the inner housing 2. The stator cores 6 are each wound with a winding so that an electromagnetic field can be generated. For this purpose, for example, a circuit board can be arranged on a cover 7, by means of which the respective windings can be interconnected and controlled. Via the cover 7, for example, a liquid can be fed centrally via a feed as a fluid inflow 8. However, there is also the possibility that a fluid is supplied or discharged from the side.

Fig. 2 zeigt in beispielhafter Ausgestaltung ein Innengehäuse 2 mit innen angeordnetem Kombinationsrotor 9. Der Kombinationsrotor dreht sich in dem Innengehäuse 2. Der Kombinationsrotor 9 kann Aussparungen 10 aufweisen, in die zum Beispiel Magnete bzw. weichmagnetische Elemente einsetzbar sind. In einem Innenraum des Kombinationsrotor 9 befindet sind ein Pumpenraum 11. In dem Pumpenraum befindet sich ein Gerotor 12. Anstelle eines Gerotors als Fluidpumpe kann auch eine Flügelradpumpe, eine Flügelzellenpumpe, ein P-Rotor, eine Rollenzellenpumpe, eine Drehschieberpumpe oder auch eine Radialkolbenpumpe im Innengehäuse 2 angeordnet sein. Hierbei kann das jeweilige Pumpenrad entweder Bestandteil des Kombinationsrotors sein oder so wie bei dem dargestellten Gerotor auf einer Achse angeordnet sein und sich darum ebenfalls drehen. Fig. 2 shows in an exemplary embodiment an inner housing 2 with an internally arranged Combination rotor 9. The combination rotor rotates in the inner housing 2. The combination rotor 9 can have recesses 10 into which, for example, magnets or soft magnetic elements can be inserted. A pump chamber 11 is located in an interior of the combination rotor 9. A gerotor 12 is located in the pump chamber. Instead of a gerotor as a fluid pump, an impeller pump, a vane pump, a P-rotor, a roller cell pump, a rotary vane pump or a radial piston pump can also be used in the inner housing 2 be arranged. In this case, the respective pump wheel can either be part of the combination rotor or, as in the gerotor shown, be arranged on an axis and therefore also rotate.

Der Kombinationsrotor 9, der gleichzeitig auch der Rotor des Elektromotors ist, kann Permanentmagnete oder auch weichmagnetische Elemente zum Beispiel in den Aussparungen 10 aufweisen. So kann mit Permanentmagneten als Axialfluss-Elektromotor ein permanenterregter Synchron- oder bürstenloser Gleichstrommotor, abgekürzt BLDC, gebildet werden, während beispielsweise mit weichmagnetischen Elementen ein Reluktanzmotor als Elektromotor in axialer Bauweise geschaffen werden kann. Ein Stator, der hier wegen der Lage auf der Rückseite des dargestellten Innengehäuses 2 angeordnet ist, kann ein weichmagnetisches Material aufweisen, zum Beispiel ein Soft Magnetic Composite, abgekürzt SMC, oder ein Kombination aus Elektroblechen und SMC.The combination rotor 9, which is also the rotor of the electric motor at the same time, can have permanent magnets or also soft magnetic elements, for example in the recesses 10. With permanent magnets as an axial flux electric motor, a permanently excited synchronous or brushless direct current motor, abbreviated BLDC, can be formed, while, for example, a reluctance motor can be created as an electric motor in an axial design using soft magnetic elements. A stator, which is arranged here because of its position on the back of the inner housing 2 shown, can have a soft magnetic material, for example a soft magnetic composite, abbreviated to SMC, or a combination of electrical steel sheets and SMC.

Eine Innenumfangsfläche 13 des Innengehäuses 2 kann derart feinbearbeitet sein, dass es im Zusammenspiel mit einem Seitendeckel eine Dichtung bildet. Die Innenumfangsfläche 13 kann jedoch auch eine zusätzliche Dichtung aufweisen, die mit einer komplementären Seite des Seitendeckels abdichtend zusammenwirkt. Fig. 3 zeigt eine Schnittansicht der Fluidpumpe 1 aus Fig. 1 in einer Schnittansicht. Das Innengehäuse 2 zusammen mit den jeweiligem ersten und zweiten Seitendeckel 3, 4 bilden ein abgedichtetes, gemeinsames Gehäuse 14, in dem ein Pumpenrad mittels des Kombinationsrotors 9 angetrieben wird. Die Darstellung zeigt die scheibenartige Geometrie des Kombinationsrotors 9. Das gemeinsame Gehäuse 14 weist bei dieser Ausgestaltung den axial angeordneten Fluidzufluss 8 und einen gegenüber axial angeordneten Fluidabfluss 15 auf. Der Fluidzufluss 8 kann hierzu im zweiten Seitendeckel mittels seitlicher Aussparung ein Fluid zum Pumpenrad, in diesem Fall zum Gerotor führen. In dem ersten Seitendeckel 3 kann wiederum gegenüberliegend oder wie bei einigen Pumpenarten versetzt hierzu der Fluidabfluss 15 in den Pumpenraum münden. Eine radiale Fluidführung ist ebenfalls möglich.An inner circumferential surface 13 of the inner housing 2 can be finely machined in such a way that it forms a seal in interaction with a side cover. The inner circumferential surface 13 can, however, also have an additional seal which cooperates in a sealing manner with a complementary side of the side cover. Fig. 3 FIG. 11 shows a sectional view of the fluid pump 1 from FIG Fig. 1 in a sectional view. The inner housing 2 together with the respective first and second side covers 3, 4 form a sealed, common housing 14 in which a pump wheel is driven by means of the combination rotor 9. The illustration shows the disk-like geometry of the combination rotor 9. In this embodiment, the common housing 14 has the axially arranged fluid inflow 8 and a fluid outflow 15 arranged axially opposite. For this purpose, the fluid inflow 8 can lead a fluid to the pump wheel, in this case to the gerotor, by means of a lateral recess in the second side cover. In the first side cover 3, the fluid outflow 15 can open into the pump space opposite or, as in the case of some types of pumps, offset for this purpose. Radial fluid guidance is also possible.

Fig. 4 zeigt den zweiten Seitendeckel 4 aus Fig. 1 mit aufgesetzten Anschlussstutzen 16 aus einer Seitenperspektive. Die Anschlussstutzen 16 erlauben zum Beispiel das Verschrauben bzw. Befestigen der so gebildeten Axialpumpe in einem Bauraum, zum Beispiel einem PKW-Motorraum. Fig. 4 shows the second side cover 4 from Fig. 1 with attached connection piece 16 from a side perspective. The connecting pieces 16 allow, for example, the screwing or fastening of the axial pump formed in this way in an installation space, for example a car engine compartment.

Fig. 5 zeigt den zweiten Seitendeckel 4 aus Fig. 1 in einer weiteren Perspektive. So sind zwei Mündungen 17 dargestellt, über die Fluid zum bzw. vom Pumpenraum fließen kann. In einem Bereich des Seitendeckels, der den nichtdargestellten Statorkernen gegenüberliegt, ist als Material zumindest ein amagnetisches Material vorgesehen. Beispielswiese wird derjenige Bereich, der von dem Kombinationsrotor überstrichen wird, aus amagnetischem Material hergestellt. Bevorzugt ist das amagnetische Material auch elektrisch nichtleitend. So kann neben Keramik, Kunststoff auch ein amagnetisches Metall zum Einsatz kommen. Der Seitendeckelkann zum Beispiel als Spritzgußteil hergestellt werden oder auch als Sinterbauteil. So können auch verschiedene Materialien zum Einsatz kommen. Eine Ausgestaltung sieht vor, dass der Seitendeckel 4 zusammen mit den Statorkernen gemeinsam hergestellt wird. Hierzu kann ein Sinterverfahren zum Einsatz kommen, wie es zum Beispiel aus der DE 10 2009 042 598 A1 und der JP H08-134509 A hervorgeht, auf die diesbezüglich im Rahmen der Offenbarung verwiesen wird. Während aus der DE 10 2009 042 598 A1 und der JP H08-134509 A hervorgehen, wie zum Beispiel gleiche oder auch unterschiedliche Sintermaterialien miteinander produziert werden können, geht aus der DE 10 2009 042 603 A1 hervor, wie vorgefertigte Komponenten in ein zu sinterndes Bauteil genau eingebracht werden können. Letzteres ist zum Beispiel für die Herstellung des Stators mit beispielsweise vorgefertigten Statorkernen aus beispielswiese gesintertem Material möglich wie auch bei der Nutzung von Elektroblechen als weichmagnetische Elemente im Kombinationsrotor zur Herstellung eines Reluktanzmotors. Auch können Magnete auf diese Weise eingebracht werden, wobei diese aufgrund der Temperaturen beim Sintern vorzugsweise auch erst nach dem Sintern eingefügt werden. Fig. 5 shows the second side cover 4 from Fig. 1 in another perspective. Two orifices 17 are shown, through which fluid can flow to and from the pump chamber. At least one non-magnetic material is provided as the material in a region of the side cover which is opposite the stator cores (not shown). For example, the area that is swept over by the combination rotor is made of non-magnetic material. The non-magnetic material is preferably also electrically non-conductive. In addition to ceramic and plastic, an amagnetic metal can also be used. The side cover can be manufactured, for example, as an injection-molded part or as a sintered component. Different materials can also be used. One embodiment provides that the side cover 4 is produced together with the stator cores. For this purpose, a sintering process can be used, for example from the DE 10 2009 042 598 A1 and the JP H08-134509 A is apparent, to which reference is made in this regard in the context of the disclosure. While from the DE 10 2009 042 598 A1 and the JP H08-134509 A shows how, for example, the same or different sintered materials can be produced with one another, goes from the DE 10 2009 042 603 A1 shows how prefabricated components can be precisely incorporated into a component to be sintered. The latter is possible, for example, for the manufacture of the stator with, for example, prefabricated stator cores made of, for example, sintered material, as well as when using electrical steel sheets as soft magnetic elements in the combination rotor to manufacture a reluctance motor. Magnets can also be introduced in this way, whereby these are preferably only inserted after sintering due to the temperatures during sintering.

Fig. 6 zeigt in beispielhafter Ausgestaltung eine zweite Version eines weiteren, dritten Seitendeckels 18. Der dritte Seitendeckel 18 weist beispielweise weichmagnetische Pole 19 auf, die vorzugsweise aus Soft Magnetic Composites hergestellt sind. Diese können zum Beispiel wie dargestellt bis zu einer Oberfläche reichen und somit auch eine Berandung des Innengehäuses bilden. Ein derartiger Aufbau hat den Vorteil, dass der Seitendeckel ansonsten aus amagnetischem Metall hergestellt werden kann, zum Beispiel mittels eines Sinterprozesses aus metallischem Pulver. Fig. 6 shows in an exemplary embodiment a second version of a further, third side cover 18. The third side cover 18 has, for example, soft magnetic poles 19, which are preferably made from soft magnetic composites. For example, as shown, these can extend to a surface and thus also form a border of the inner housing. Such a structure has the advantage that the side cover can otherwise be made from non-magnetic metal, for example from metallic powder by means of a sintering process.

Die vorgeschlagene Fluidpumpe kann in unterschiedlichen Anwendungsgebieten zum Einsatz gelangen. Es können Flüssigkeiten unterschiedlichster Art wie Newton'sche Fluide oder auch Bingham'sche Fluide wie auch Gase transportiert werden. Die Nutzung kann unterschiedlichste Bereiche umfassen wie die chemische Industrie, die Nahrungsmittelindustrie, die Nutzung in Maschinen und Anlagen oder auch im Fahrzeug-, Flugzeug- und Schifffahrtsbereich. Die Fluide können Laugen oder Säuren umfassen, korrosiv wirken, gekühlt oder erhitzt sein. Nur beispielhaft ohne abschließend zu sein, werden die folgenden Beispiele angeführt:
Ölpumpe bei einem Verbrennungsmotor; Umwälzpumpe, zum Beispiel bei einem Kühlkreislauf oder auch im Heizungsbereich; als Zirkulationspumpe, zum Beispiel in Trinkwasseranlagen; Schmierstoffpumpe; als hydraulische Kupplungsaktuator; bei der Kraftstoffförderung; bei der Einspritzanlage im Bereich des Common Rail bei der Benzin- oder auch Dieseldirekteinspritzung; als Klimakompressor; als Vakuumpumpe; als Servopumpe, zum Beispiel im Bereich der Lenkkraftunterstützung; bei der Bremskraftverstärkung; in Getrieben, insbesondere Automatikgetrieben zum Beispiel zur Kühlung, zum Aufrechterhalten eines Drucks, als Absaugpumpe; im Bereich von Aquarien; bei PC- und Serverkühllungen wie zum Beispiel bei einer Wasserkühlung; in der Medizintechnik, zum Beispiel bei einem Dialysegerät, einer Infusionspumpe, einer Insulinpumpe; bei der Abgasnachbehandlung, zum Beispiel bei der Zugabe von Harnstoff; als Entlüftungspumpe; bei Bremskraftverstärkern, bei der Befüllung von pneumatischen Aktuatoren; bei aktiven Fahrwerken; in Scheiben- bzw. Scheinwerferreinigungsanlagen; in Waschanlagen; als Tauchpumpe; als Antriebspumpe in hydraulischen Maschinen; in einem Hybridantrieb zum Beispiel eines Fahrzeugs.The proposed fluid pump can be used in different areas of application get used. Liquids of the most varied types such as Newtonian fluids or Bingham fluids as well as gases can be transported. The use can include a wide variety of areas such as the chemical industry, the food industry, use in machines and systems or in the vehicle, aircraft and shipping sectors. The fluids can include alkalis or acids, have a corrosive effect, be cooled or heated. The following examples are given as examples without being exhaustive:
Oil pump in an internal combustion engine; Circulation pump, for example in a cooling circuit or in the heating area; as a circulation pump, for example in drinking water systems; Lubricant pump; as a hydraulic clutch actuator; in fuel delivery; in the case of the injection system in the area of the common rail in the case of gasoline or diesel direct injection; as an air conditioning compressor; as a vacuum pump; as a servo pump, for example in the area of power steering assistance; in the brake booster; in transmissions, in particular automatic transmissions, for example for cooling, for maintaining a pressure, as a suction pump; in the field of aquariums; with PC and server cooling such as water cooling; in medical technology, for example in a dialysis machine, an infusion pump, an insulin pump; in exhaust gas aftertreatment, for example when adding urea; as a vent pump; with brake boosters, when filling pneumatic actuators; with active trolleys; in windshield and headlight cleaning systems; in washing facilities; as a submersible pump; as a drive pump in hydraulic machines; in a hybrid drive of a vehicle, for example.

Claims (11)

  1. Fluid pump (1), driven by an electric motor which is coupled to a pump rotor of the fluid pump, wherein the electric motor is an axial flow electric motor, the electric motor rotor of which is also the pump rotor, and the pump rotor and the electric motor rotor are accommodated in a common housing (2) in which the pump rotor and the electric motor rotor rotate in an integrated fashion in the shape of a disk as a combination rotor (9), wherein the common housing (2) has a fluid inflow and a fluid outflow (8, 15) to and from the combination rotor (9); wherein a first stator of the axial flow motor surrounds the combination rotor on a first end side, and a second stator of the axial flow motor surrounds the combination rotor on a second end side, opposite the first end side, of the common housing; characterized in that cores (6) of the first stator and of the second stator lie opposite one another, offset with respect to one another and axis-parallel with respect to the rotational axis of the rotor.
  2. Fluid pump (1) as claimed in claim 1, characterized in that a pump chamber (11) and magnets or soft-magnetic elements of the electric motor, which are oriented axially with respect to the rotational axis of the combination rotor (9), are arranged extending from said rotational axis when viewed in a radial direction.
  3. Fluid pump (1) as claimed in claim 1 or 2, characterized in that in the combination rotor (9), a multiplicity of axially oriented magnets or soft-magnetic elements are distributed along a circumference of the combination rotor (9).
  4. Fluid pump (1) as claimed in one of the preceding claims, characterized in that cores (6) of the stator, which are oriented axis-parallel with respect to the rotational axis of the rotor, have at least partially a soft-magnetic material.
  5. Fluid pump (1) as claimed in claim 4, characterized in that the common housing (2) has a nonmagnetic material, at least in a region between the rotating combination rotor (9) and the cores (6) of the stator.
  6. Fluid pump (1) as claimed in one of the preceding claims, characterized in that a pump chamber (11) is closed off in the common housing (2), and the fluid inflow and/or the fluid outflow (8, 15) to and from the pump chamber (11) preferably occurs axially along the rotational axis, in particular preferably through the electric motor.
  7. Fluid pump (1) as claimed in one of the preceding claims, characterized in that the combination rotor (9) has a pump wheel which rotates along, wherein a shaft of the combination rotor (9) is arranged and mounted inside the common housing (2).
  8. Fluid pump (1) as claimed in one of the preceding claims 1 to 7, characterized in that the combination rotor (9) rotates about a rotational axis in the common housing (2), wherein a pump wheel which rotates along is seated on the rotational axis.
  9. Fluid pump (1) as claimed in one of the preceding claims, characterized in that a first and a second end of the shaft or of the rotational axis of the combination rotor (9) respectively end in the common housing (2).
  10. Method for manufacturing a fluid pump (1), preferably a fluid pump as claimed in one of claims 1 to 9, having the following steps:
    - manufacturing a combination rotor (9) as a pump rotor and an electric motor rotor of a disk design with axial arrangement of magnets or soft-magnetic elements in the combination rotor (9),
    - insertion of the combination rotor (9) into an outer ring,
    - insertion of a shaft or axle,
    - lateral attachment of at least one side wall to the outer ring to provide fluid-tight sealing of the combination rotor (9) with the accommodation of an end of the shaft or axle in the side wall,
    - lateral attachment of at least one first and one second stator of an electric motor to the side wall in order to drive the combination rotor (9) in the common housing (2) formed by means of at least the outer ring and side wall, wherein cores (6) of the first and of the second stator are arranged axis-parallel with respect to the rotational axis of the combination rotor (9) and in that cores (6) of the first stator and of the second stator lie opposite one another, offset with respect to one another and axis-parallel with respect to the rotational axis of the rotor.
  11. Method as claimed in claim 10, characterized in that the cores (6) of the stator are pressed and manufactured from a soft-magnetic material.
EP16719085.9A 2015-04-28 2016-04-28 Fluid pump Active EP3289221B1 (en)

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DE102015207748.9A DE102015207748A1 (en) 2015-04-28 2015-04-28 fluid pump
PCT/EP2016/059549 WO2016174164A1 (en) 2015-04-28 2016-04-28 Fluid pump

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EP3289221A1 (en) 2018-03-07
US20180128268A1 (en) 2018-05-10
DE102015207748A1 (en) 2016-11-03
CN107787409A (en) 2018-03-09
WO2016174164A1 (en) 2016-11-03
US11078904B2 (en) 2021-08-03

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