EP3545196A1 - Electric motor-vehicle coolant pump - Google Patents

Electric motor-vehicle coolant pump

Info

Publication number
EP3545196A1
EP3545196A1 EP17768126.9A EP17768126A EP3545196A1 EP 3545196 A1 EP3545196 A1 EP 3545196A1 EP 17768126 A EP17768126 A EP 17768126A EP 3545196 A1 EP3545196 A1 EP 3545196A1
Authority
EP
European Patent Office
Prior art keywords
motor
coolant pump
outlet openings
unit
vehicle coolant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17768126.9A
Other languages
German (de)
French (fr)
Other versions
EP3545196B1 (en
Inventor
Lars HEITZIG
Clemens REICHEL
DR. Hemke MAETER
Falk STEIGER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pierburg Pump Technology GmbH
Original Assignee
Pierburg Pump Technology GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pierburg Pump Technology GmbH filed Critical Pierburg Pump Technology GmbH
Publication of EP3545196A1 publication Critical patent/EP3545196A1/en
Application granted granted Critical
Publication of EP3545196B1 publication Critical patent/EP3545196B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D13/0673—Units comprising pumps and their driving means the pump being electrically driven the motor being of the inside-out type
    • 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
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/064—Details of the magnetic circuit

Definitions

  • the invention relates to an electric vehicle coolant pump with a
  • Housing having a pump unit and a motor unit, wherein the motor unit has a stored by means of bearing means in the housing motor rotor and a motor stator, wherein the motor rotor has an impeller member and an axially extending drive member having an axis of rotation, wherein on the impeller member blade elements of the pump unit are arranged wherein inlet and Ausutzö Stammen are provided with respective central axes, which allows a flow of the motor unit with a cooling fluid of the pump unit, wherein in the impeller member, the outlet openings of the pump unit are provided, wherein the outlet openings are provided in the motor rotor.
  • DE 199 48 972 A1 discloses a motor pump with a pump unit and a motor unit, wherein the motor unit has a designed as an external rotor motor rotor having an impeller member with blade elements.
  • the motor unit For cooling the motor unit, it is known to guide cooling fluid to be pumped from a pressure side of the pump unit through the motor unit to a suction side of the pump unit.
  • the object of the invention is therefore to avoid the above-mentioned disadvantage in a simple and cost-effective manner.
  • the outlet openings extend substantially in the tangential or radial direction to the projected axis of rotation of the impeller member.
  • the angle ⁇ is between 45 ° - 65 °. This will be a special ensures safe removal of dirt particles, since the dirt particles are conveyed into the area of the blade elements.
  • the outlet openings are designed as bores which are arranged in a circle uniformly offset in the circumferential direction. Due to the embodiment of a coolant pump according to the invention, for example, three outlet bores may be sufficient for the effective removal of the dirt particles.
  • the motor rotor is cup-shaped, wherein the drive member is cylindrical. Despite the cup-shaped design of the motor rotor, the dirt particles are removed without residue from the interior of the motor rotor. In a particularly advantageous manner, the motor rotor is an external rotor Ist.
  • the outlet openings are in the outermost
  • the motor unit is an electronically commutated electric motor.
  • the inlet opening as an annular gap between the housing and the cylindrical
  • FIG. 1 shows a sectional view of a K FZ coolant pump according to the invention
  • Figure 2 is a schematic sectional view of the motor vehicle coolant pump
  • FIG. 3 shows a perspective external view of the impeller element from FIG. 1 with an indicated outlet center axis plane and an indicated rotation axis plane
  • FIG. 4 shows a perspective inside view of the impeller element from FIG. 3.
  • the motor vehicle coolant pump 2 in this case has a multi-part housing 4 made of plastic, in which essentially a motor unit 6 and a pump unit 8 are provided.
  • the pump unit 8 essentially consists of an impeller member 9, which has a rotation axis 10.
  • the impeller member 9 has integrally formed blade elements 12 in a known manner. In a known manner, a pressure build-up is effected in this embodiment by the impeller 9 in the housing part 14 of the pump unit 8, wherein cooling fluid can be supplied via an inlet port 16 and via an outlet port 18 can be discharged.
  • the impeller member 9 of the pump unit 8 is integrally connected to a cylindrical drive member 20 of the motor unit 6 and thus forms a cup-shaped motor rotor 22.
  • Such an arrangement is commonly referred to as external rotor.
  • the motor rotor 22 is in this case mounted via bearing means 24 in a containment shell 26 of the housing 4 in a known manner.
  • the motor rotor 22 thus forms here together with a motor stator 28 an electronic ⁇ commutated electric motor, 22 non-illustrated embedded permanent magnets are provided in the drive member 20 of the motor rotor, so that the motor rotor 22 is entrained by the rotatable in the motor stator 28 rotatably traveling magnetic field and rotated.
  • the cooling fluid thus circulates via this inlet opening 30 from a pressure side 32 of the pump unit 8 into a gap between the cylindrical drive member 20 and the containment shell 18 toward outlet openings 33, which in turn have central axes 34, to a suction side 36 of the pump unit 8.
  • Any dirt particles present in the cooling fluid are collected due to their centrifugal force in the transition 38 between the cylindrical drive member 20 and the impeller member 9, so that they can not damage the motor unit 6 and in particular the bearing means 24.
  • FIG. 2 shows, in a schematic view, the flow of cooling fluid from the inlet opening 30 between the housing 4 and the drive member 20 via a gap between the drive member 20 and the containment shell 26 toward the outlet openings 33.
  • FIG. 3 once again shows, in a perspective view, the impeller member 9 and the outlet openings 33, which are designed here as bores and which are arranged in a circle, offset by 120 °.
  • the outlet openings 33 have a tangential direction here.
  • the outlet opening 33 uses the outlet opening 33; in that it is oriented in the direction of flow, the speed difference between the impeller 9 and the cooling fluid.
  • a flow-directed guidance of the cooling fluid from the inner region of the motor rotor 22 is effected in the housing part 14, whereby an accumulation of dirt particles is effectively avoided.
  • FIG. 4 now shows, in a perspective view, the inside of the impeller element 9 from FIG. 2. Due to the arrangement of the outlet bores according to the invention, no dirt particles collect more in a cup bend 40 of the impeller element 9. With an inner diameter of the impeller member 9 of 35 mm, the outlet openings 33 have a diameter of 4 mm and are arranged on a circular path with a radius of 15.5 mm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention relates to an electric motor-vehicle coolant pump, comprising a housing (4), which has a pump unit (8) and a motor unit (6), wherein the motor unit (6) has a motor rotor (22), which is mounted in the housing (4) by means of bearing elements (24), and has a motor stator (28), wherein the motor rotor (22) has an impeller element (9) and a drive element (20), which extends in the axial direction and which has an axis of rotation (10), wherein blade elements (12) of the pump unit (8) are arranged on the impeller element (9), wherein inlet and outlet openings (30, 33) having respective center axes (34) are provided, which allow a cooling fluid of the pump unit to flow through the motor unit (6), wherein the outlet openings (33) of the pump unit (8) are provided in the impeller element (9), wherein the outlet openings (33) are provided in the motor rotor (22), wherein, viewed in the outlet direction, the center axis (34) of each outlet opening (33) includes an angle between α = 10° and α = 135° with a projection of the axis of rotation (10) into said outlet opening (33).

Description

Elektrische KFZ-Kühlmittelpumpe Die Erfindung betrifft eine elektrische KFZ-Kühlmittelpumpe mit einem The invention relates to an electric vehicle coolant pump with a
Gehäuse, das eine Pumpeneinheit und eine Motoreinheit aufweist, wobei die Motoreinheit einen mittels Lagermitteln im Gehäuse gelagerten Motorrotor sowie einen Motorstator besitzt, wobei der Motorrotor ein Laufradorgan und ein in Axialrichtung verlaufendes Antriebsorgan mit einer Drehachse aufweist, wobei an dem Laufradorgan Schaufelelemente der Pumpeneinheit angeordnet sind, wobei Einlass- und Ausfassöffnungen mit jeweiligen Mittelachsen vorgesehen sind, die ein Durchströmen der Motoreinheit mit einem Kühlfluid der Pumpeneinheit ermöglicht, wobei im Laufradorgan die Auslassöffnungen der Pumpeneinheit vorgesehen sind, wobei die Auslassöffnungen im Motorrotor vorgesehen sind. Housing having a pump unit and a motor unit, wherein the motor unit has a stored by means of bearing means in the housing motor rotor and a motor stator, wherein the motor rotor has an impeller member and an axially extending drive member having an axis of rotation, wherein on the impeller member blade elements of the pump unit are arranged wherein inlet and Ausfassöffnungen are provided with respective central axes, which allows a flow of the motor unit with a cooling fluid of the pump unit, wherein in the impeller member, the outlet openings of the pump unit are provided, wherein the outlet openings are provided in the motor rotor.
Elektrische KFZ-Kühlmittelpumpen mit Auslassöffnungen zur fiuidischen Verbindung mit der Saugseite der Pumpeneinheit sind aus dem Stand der Technik hinlänglich bekannt. So offenbart die DE 199 48 972 AI eine Motorpumpe mit einer Pumpeneinheit und einer Motoreinheit, wobei die Motoreinheit einen als Außenläufer gestalteten Motorrotor besitzt, der ein Laufradorgan mit Schaufelelementen besitzt. Zur Kühlung der Motoreinheit ist es bekannt, zu pumpendes Kühlfluid von einer Druckseite der Pumpeneinheit durch die Motoreinheit hin zu einer Saugseite der Pumpeneinheit zu führen . Gemäß der DE 199 48 972 AI ist hier eine Öffnung im Gehäuse im Bereich der Pumpeneinheit vorgesehen, durch die das Kühlfluid in die Motoreinheit dringt, wobei das Kühlfluid die Motoreinheit über eine hohl ausgeführte Motor rotorwelle wieder verlässt, Des Weiteren ist es bekannt, dass das Kühlfluid die Motoreinheit über Öffnungen im Lagerbereich der Motorrotorwelle verlässt. In beiden Fällen kann die Funktion und Lebensdauer der KFZ-Kühlmittelpumpe durch Ablagerungen von im Kühlfluid befindlichen Teilchen, wie zum Beispiel Gießsand, beeinträchtigt werden. Insbesondere bei einer Ableitung des Kühffluids durch den Lagerbereich kommt es zu einer hydroabrasiven Strömung, die zu einem hohen radialen und axialen Lagerverschleiß führt. Aus der DE 10 2009 009898 AI und der US 2004/0234395 AI ist es hierzu bekannt, Austassöffnungen im Laufradorgan vorzusehen, um die Schmutzteilchen über die Auslassöffnungen abzuführen, wobei jedoch noch immer auch eine Verschmutzung des Lagerbereiches stattfindet. Electric automotive coolant pumps with exhaust ports for fluid communication with the suction side of the pump unit are well known in the art. Thus, DE 199 48 972 A1 discloses a motor pump with a pump unit and a motor unit, wherein the motor unit has a designed as an external rotor motor rotor having an impeller member with blade elements. For cooling the motor unit, it is known to guide cooling fluid to be pumped from a pressure side of the pump unit through the motor unit to a suction side of the pump unit. According to DE 199 48 972 AI here an opening in the housing in the region of the pump unit is provided, through which the cooling fluid penetrates into the motor unit, wherein the cooling fluid leaves the motor unit via a hollow engine rotor shaft again, Furthermore, it is known that the Cooling fluid leaving the motor unit through openings in the bearing area of the motor rotor shaft. In either case, the function and life of the automotive coolant pump may be affected by deposits of particles in the cooling fluid, such as foundry sand. Especially with a derivative of the Cooling fluids through the bearing area, it comes to a hydro-abrasive flow, which leads to a high radial and axial bearing wear. From DE 10 2009 009898 AI and US 2004/0234395 AI it is known to provide Austassöffnungen in the impeller member to dissipate the dirt particles through the outlet openings, but still there is also a contamination of the storage area.
Hierzu ist es aus der EP 3 012 457 AI bekannt die Auslassöffnungen im Bereich der vom Motorrotormittelpunkt abgewandten Enden der Schaufelelemente an zu ordnen, wobei die Bohrung und damit eine Mittelachse der Auslassöffnungen in Richtung der Schaufelelemente verläuft, Zwar kann der Lagerverschleiß mit einer derartigen Ausführungsform verhindert werden, jedoch zeigt sich auch, dass Schmutzpartikel im zur Motoreinheit gerichteten Raum des Laufradorgans verbleiben und folglich die Ausfaflwahrscheinlichkeit der Kühlmittelpumpe erhöhen. For this it is known from EP 3 012 457 AI to arrange the outlet openings in the region of the motor rotor center point facing away from the blade elements, the bore and thus a central axis of the outlet openings in the direction of the blade elements, Although the bearing wear can be prevented with such an embodiment However, it is also found that dirt particles remain in the space directed towards the motor unit of the impeller and thus increase the Ausfaflwahrscheinlichkeit the coolant pump.
Aufgabe der Erfindung ist es daher, den oben genannten Nachteil auf einfache und kostengünstige Weise zu vermeiden. The object of the invention is therefore to avoid the above-mentioned disadvantage in a simple and cost-effective manner.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass Mittelachsen der Auslassöffnungen in Auslassrichtung gesehen einen Winkel zwischen a= 10° und «= 135° nach außen gerichtet mit einer Projektion der Drehachse in die jeweilige Auslassöffnung einschließen. Durch die beschriebene Ausführung der Kühlmittelpumpe entweichen die Schmutzpartikel über die Auslassöffnung nahezu vollständig, ohne dass Schmutzpartikel im Bereich des Motorrotors verbleiben und gegebenenfalls die Pumpeneinheit beschädigen. This object is achieved according to the invention in that center axes of the outlet openings in the outlet direction enclose an angle between a = 10 ° and "= 135 ° directed outwards with a projection of the axis of rotation into the respective outlet opening. As a result of the described design of the coolant pump, the dirt particles almost completely escape via the outlet opening, without dirt particles remaining in the area of the motor rotor and possibly damaging the pump unit.
In einer besonders vorteilhaften Ausführungsform verlaufen die Auslassöffnungen im Wesentlichen in tangentialer oder radialer Richtung zur projezierten Drehachse des Laufradorgans. Vorzugsweise beträgt hierbei der Winkel α zwischen 45° - 65°. Hierdurch wird ein besonders sicherer Abtransport der Schmutzpartikel gewährleistet, da die Schmutzpartikel in den Bereich der Schaufelelemente gefördert werden. In a particularly advantageous embodiment, the outlet openings extend substantially in the tangential or radial direction to the projected axis of rotation of the impeller member. Preferably, the angle α is between 45 ° - 65 °. This will be a special ensures safe removal of dirt particles, since the dirt particles are conveyed into the area of the blade elements.
In vorteilhafter Weise sind die Auslassöffnungen als Bohrungen ausgeführt» die kreisförmig gleichmäßig in Umfangsrichtung versetzt angeordnet sind, Aufgrund der erfindungsgemäßen Ausführungsform einer Kühlmittelpumpe können beispielsweise drei Auslassbohrungen zum wirkungsvollen Abtransport der Schmutzpartikel ausreichen. Advantageously, the outlet openings are designed as bores which are arranged in a circle uniformly offset in the circumferential direction. Due to the embodiment of a coolant pump according to the invention, for example, three outlet bores may be sufficient for the effective removal of the dirt particles.
In einer besonders vorteilhaften Ausführungsform ist der Motorrotor topfförmig ausgebildet, wobei das Antriebsorgan zylinderförmig ausgebildet ist. Trotz der topfförmig en Ausgestaltung des Motorrotors, werden die Schmutzpartikel rückstandslos aus dem Innenraum des Motorrotors abgeführt. In besonders vorteilhafter Weise ist der Motorrotor ein Außenläufer Ist. In a particularly advantageous embodiment, the motor rotor is cup-shaped, wherein the drive member is cylindrical. Despite the cup-shaped design of the motor rotor, the dirt particles are removed without residue from the interior of the motor rotor. In a particularly advantageous manner, the motor rotor is an external rotor Ist.
In besonders vorteilhafter Weise sind die Auslassöffnungen im äußerstenIn a particularly advantageous manner, the outlet openings are in the outermost
Bereich des Laufradorgans beziehungsweise im Falle einer topfförmigen Ausbildung des Motorrotors im Laufradorgan oder Im zylinderförmigen Antriebsorgan im Bereich des Übergangs vom Laufradorgan zum Antriebsorgan vorgesehen. Auf diese Weise wird ein Verbleiben der Schmutzpartikel im topfförmigen Motorrotor besonders wirksam vermieden. Area of the impeller member or in the case of a cup-shaped design of the motor rotor in the impeller or in the cylindrical drive member in the region of the transition from the impeller member provided to the drive member. In this way, a retention of the dirt particles in the cup-shaped motor rotor is particularly effectively avoided.
In vorteilhafter Weise ist die Motoreinheit ein elektronisch kommutierter Elektromotor. Advantageously, the motor unit is an electronically commutated electric motor.
Des Weiteren kann in vorteilhafter Weise die Einlassöffnung als ringförmiger Spalt zwischen dem Gehäuse und dem zylinderförmigenFurthermore, advantageously, the inlet opening as an annular gap between the housing and the cylindrical
Antriebsorgan ausgeführt sind. Insbesondere beim Nassläuferprinzip ergibt sich naturgemäß ein ringförmiger Spalt zwischen dem zylinderförmigen Antriebsorgan und dem Gehäuse, welcher auf einfacheDrive are executed. In particular, the wet-runner principle naturally results in an annular gap between the cylindrical drive member and the housing, which is simple
Weise die Eintrittsöffnung ausbildet. Die Erfindung wird nachfolgend anhand einer Zeichnung näher erläutert, hierbei zeigt: Way forms the inlet. The invention will be explained in more detail with reference to a drawing, in which:
Figur 1 eine Schnittansicht einer erfindungsgemäßen K FZ- Kühlmittelpumpen, FIG. 1 shows a sectional view of a K FZ coolant pump according to the invention,
Figur 2 eine schematische Schnittansicht der KFZ-Kühimittelpumpe ausFigure 2 is a schematic sectional view of the motor vehicle coolant pump
Fig. 1, Fig. 1,
Figur 3 eines perspektivische Außenansicht des Laufradorgans aus Figur 1 mit einer angedeuteten Auslassmittelachsenebene und einer angedeuteten Drehachsenebene, und FIG. 3 shows a perspective external view of the impeller element from FIG. 1 with an indicated outlet center axis plane and an indicated rotation axis plane, and FIG
Figur 4 eine perspektivische Innenansicht des Laufradorgan aus Figur 3. FIG. 4 shows a perspective inside view of the impeller element from FIG. 3.
Figur 1 zeigt in einer Schnittansicht eine erfindungsgemäße KFZ- Kühlmittelpumpe 2. Die KFZ-Kühlmittelpumpe 2 weist hierbei ein mehrteiliges Gehäuse 4 aus Kunststoff auf, in dem im Wesentlichen eine Motoreinheit 6 und eine Pumpeneinheit 8 vorgesehen sind. Die Pumpeneinheit 8 besteht im Wesentlichen aus einem Laufradorgan 9, das eine Drehachse 10 besitzt. Das Laufradorgan 9 weist auf bekannte Weise angeformte Schaufelelemente 12 auf. Auf bekannte Weise wird in diesem Ausführungsbeispiel durch das Laufradorgan 9 im Gehäuseteil 14 der Pumpeneinheit 8 ein Druckaufbau bewirkt, wobei Kühlfluid über einen Einlassanschluss 16 zuführbar und über einen Auslassanschluss 18 abführbar ist. Das Laufradorgan 9 der Pumpeneinheit 8 ist einstückig mit einem zylindrischen Antriebsorgan 20 der Motoreinheit 6 verbunden und bildet auf diese Weise einen topfförmigen Motorrotor 22. Eine derartige Anordnung wird üblicher Weise als Außenläufer bezeichnet. Der Motorrotor 22 ist hierbei über Lagermittel 24 in einem Spalttopf 26 des Gehäuses 4 auf bekannte Weise gelagert. Der Motorrotor 22 bildet also hier zusammen mit einem Motorstator 28 einen elektronisch ^ kommutierten Elektromotor, wobei im Antriebsorgan 20 des Motorrotors 22 nicht weiter dargestellte eingebettete Permanentmagnete vorgesehen sind, so dass der Motorrotor 22 durch das in dem Motorstator 28 erzeugbare rotatorisch wandernde Magnetfeld mitgeschleppt und in Drehung versetzt wird. Als Einlassöffnung 30 für ein die Motoreinheit 5 zu kühlendes Kühlfluid ist im vorliegenden Ausführungsbeispiel ein ringförmiger Spalt zwischen dem Gehäuse 4, hier zwischen dem Gehäuseteil 14 und dem zylinderförmigen Antriebsorgan 20 vorgesehen. Das Kühlfluid zirkuliert also über diese Einlassöffnung 30 von einer Druckseite 32 der Pumpeneinheit 8 in einen Spalt zwischen dem zylinderförmigen Antriebsorgan 20 und dem Spalttopf 18 hin zu Auslassöffnungen 33, die ihrerseits Mittelachsen 34 aufweisen, zu einer Saugseite 36 der Pumpeneinheit 8 gefördert. Eventuell im Kühlfluid vorhandene Schmutzpartikel werden aufgrund ihrer Zentrifugalkraft im Übergang 38 zwischen dem zylinderförmigen Antriebsorgan 20 und dem Laufradorgan 9 gesammelt, so dass sie die Motoreinheit 6 und hier insbesondere die Lagermittel 24 nicht schädigen können. 1 shows a sectional view of a motor vehicle coolant pump 2 according to the invention. The motor vehicle coolant pump 2 in this case has a multi-part housing 4 made of plastic, in which essentially a motor unit 6 and a pump unit 8 are provided. The pump unit 8 essentially consists of an impeller member 9, which has a rotation axis 10. The impeller member 9 has integrally formed blade elements 12 in a known manner. In a known manner, a pressure build-up is effected in this embodiment by the impeller 9 in the housing part 14 of the pump unit 8, wherein cooling fluid can be supplied via an inlet port 16 and via an outlet port 18 can be discharged. The impeller member 9 of the pump unit 8 is integrally connected to a cylindrical drive member 20 of the motor unit 6 and thus forms a cup-shaped motor rotor 22. Such an arrangement is commonly referred to as external rotor. The motor rotor 22 is in this case mounted via bearing means 24 in a containment shell 26 of the housing 4 in a known manner. The motor rotor 22 thus forms here together with a motor stator 28 an electronic ^ commutated electric motor, 22 non-illustrated embedded permanent magnets are provided in the drive member 20 of the motor rotor, so that the motor rotor 22 is entrained by the rotatable in the motor stator 28 rotatably traveling magnetic field and rotated. As an inlet opening 30 for a motor unit 5 to be cooled cooling fluid in the present embodiment, an annular gap between the housing 4, here provided between the housing part 14 and the cylindrical drive member 20. The cooling fluid thus circulates via this inlet opening 30 from a pressure side 32 of the pump unit 8 into a gap between the cylindrical drive member 20 and the containment shell 18 toward outlet openings 33, which in turn have central axes 34, to a suction side 36 of the pump unit 8. Any dirt particles present in the cooling fluid are collected due to their centrifugal force in the transition 38 between the cylindrical drive member 20 and the impeller member 9, so that they can not damage the motor unit 6 and in particular the bearing means 24.
Figur 2 zeigt in einer schematischen Ansicht den Kühlfluidstrom von der Einlassöffnung 30 zwischen dem Gehäuse 4 und dem Antriebsorgan 20 über einen Spalt zwischen dem Antriebsorgan 20 und dem Spalttopf 26 hin zu den Auslassöffnungen 33. FIG. 2 shows, in a schematic view, the flow of cooling fluid from the inlet opening 30 between the housing 4 and the drive member 20 via a gap between the drive member 20 and the containment shell 26 toward the outlet openings 33.
Figur 3 zeigt noch einmal in einer perspektivischen Ansicht das Laufradorgan 9 und die Auslassöffnungen 33, die hier als Bohrungen ausgeführt sind, und die kreisförmig, um 120° versetzt, angeordnet sind. Die Auslassöffnungen 33 weisen hier eine tangentiale Richtung auf. Deren Mittelachse 34 schließt mit der in die jeweilige Auslassöffnung 33 projezierten Drehachse 10 einen Winkel a= 65° ein. Hierbei nutzt die Auslassöffnung 33; dadurch, dass sie in Strömungsrichtung ausgerichtet ist, die Geschwindigkeitsdifferenz zwischen dem Laufradorgan 9 und dem Kühlfluid. Hierdurch wird eine strömungsgerichtete Führung des Kühlfluids vom Innenbereich des Motorrotors 22 in das Gehäuseteil 14 bewirkt, wodurch eine Ansammlung von Schmutzpartikeln wirksam vermieden wird. FIG. 3 once again shows, in a perspective view, the impeller member 9 and the outlet openings 33, which are designed here as bores and which are arranged in a circle, offset by 120 °. The outlet openings 33 have a tangential direction here. Their central axis 34 encloses an angle a = 65 ° with the rotational axis 10 projected into the respective outlet opening 33. In this case uses the outlet opening 33; in that it is oriented in the direction of flow, the speed difference between the impeller 9 and the cooling fluid. As a result, a flow-directed guidance of the cooling fluid from the inner region of the motor rotor 22 is effected in the housing part 14, whereby an accumulation of dirt particles is effectively avoided.
Figur 4 zeigt nun in einer perspektivischen Ansicht die Innenseite des Laufradorgans 9 aus Figur 2. Durch die erfindungsgemäße Anordnung der Auslassbohrungen sammeln sich keine Schmutzpartikel mehr in einer Topfbiegung 40 des Laufradorgans 9 an. Bei einem Innendurchmesser des Laufradorgans 9 von 35mm besitzen die Auslassöffnungen 33 einen Durchmesser von 4mm und sind auf einer Kreisbahn mit einem Radius von 15,5mm angeordnet. FIG. 4 now shows, in a perspective view, the inside of the impeller element 9 from FIG. 2. Due to the arrangement of the outlet bores according to the invention, no dirt particles collect more in a cup bend 40 of the impeller element 9. With an inner diameter of the impeller member 9 of 35 mm, the outlet openings 33 have a diameter of 4 mm and are arranged on a circular path with a radius of 15.5 mm.
Es ist auch möglich, die Auslassöffnungen als radial verlaufende Auslassbohrungen auszuführen. It is also possible to carry out the outlet openings as radially extending outlet holes.

Claims

Patentansprüche claims
1. Elektrische KFZ-Kühlmittelpumpe mit einem Gehäuse (4), das eine Pumpeneinheit (8) und eine Motoreinheit (6) aufweist, wobei die Motoreinheit (6) einen mittels Lagermitteln (24) im Gehäuse (4) gelagerten Motorrotor (22) sowie einen Motorstator (28) besitzt, wobei der Motorrotor (22) ein Laufradorgan (9) und ein in Axialrichtung verlaufendes Antriebsorgan (20) mit einer Drehachse (10) aufweist, wobei an dem Laufradorgan (9) Schaufelelemente (12) der Pumpeneinheit (8) angeordnet sind, wobei Einlass- und Auslassöffnungen (30, 33) mit jeweiligen Mittelachsen (34) vorgesehen sind, die ein Durchströmen der Motoreinheit (6) mit einem Kühlfluid der Pumpeneinheit ermöglicht, wobei im Laufradorgan (9) die Auslassöffnungen (33) der Pumpeneinheit (8) vorgesehen sind, wobei die Auslassöffnungen (33) im Motorrotor (22) vorgesehen sind, dadurch gekennzeichnet, dass Mittelachsen (34) der Auslassöffnungen (33) in Auslassrichtung gesehen einen Winkel zwischen o = 10° und a- 135° mit einer Projektion der Drehachse (10) in die jeweilige Auslassöffnung (33) einschließen. 1. Electric motor vehicle coolant pump with a housing (4) having a pump unit (8) and a motor unit (6), wherein the motor unit (6) by means of bearing means (24) in the housing (4) mounted motor rotor (22) and a motor stator (28), wherein the motor rotor (22) an impeller member (9) and an axially extending drive member (20) having an axis of rotation (10), wherein on the impeller member (9) blade elements (12) of the pump unit (8 ) are provided, wherein inlet and outlet openings (30, 33) with respective central axes (34) are provided, which allows a flow through the motor unit (6) with a cooling fluid of the pump unit, wherein in the impeller member (9), the outlet openings (33) of Pump unit (8) are provided, wherein the outlet openings (33) in the motor rotor (22) are provided, characterized in that center axes (34) of the outlet openings (33) seen in the outlet direction at an angle between o = 10 ° and a- 135 ° with one Include projection of the axis of rotation (10) in the respective outlet opening (33).
2. Elektrische KFZ-Kühlmittelpumpe nach Anspruch 1, dadurch gekennzeichnet, dass die Auslassöffnungen (33) im Wesentlichen in tangentialer oder radialer Richtung zur projezierten Drehachse (10) des Laufradorgans (9) verlaufen. 2. Electric motor vehicle coolant pump according to claim 1, characterized in that the outlet openings (33) extend substantially in the tangential or radial direction to the projected rotational axis (10) of the impeller member (9).
3. Elektrische KFZ-Kühlmittelpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Winkel der α zwischen 45° - 65° beträgt. 3. Electric vehicle coolant pump according to claim 1 or 2, characterized in that the angle of the α is between 45 ° - 65 °.
4. Elektrische KFZ-Kühlmittelpumpe nach Anspruch 1 bis 3, dadurch gekennzeichnet, dass die Auslassöffnungen (33) als Bohrungen ausgeführt sind, die kreisförmig, gleichmäßig in Umfangsrichtung versetzt, angeordnet sind. 4. Electric motor vehicle coolant pump according to claim 1 to 3, characterized in that the outlet openings (33) are designed as bores, which are circular, evenly offset in the circumferential direction, are arranged.
5. Elektrische KFZ-Kühlmittelpumpe nach einem der vorhergehenden5. Electric vehicle coolant pump according to one of the preceding
Ansprüche, dadurch gekennzeichnet, dass der Motorrotor (22) topfförmig ausgebildet ist, wobei das Antriebsorgan (20) zylinderförmig ausgebildet ist Claims, characterized in that the motor rotor (22) is pot-shaped, wherein the drive member (20) is cylindrical
6. Elektrische KFZ-Kühlmittelpumpe nach Anspruch 5, dadurch gekennzeichnet, dass der Motorrotor (22) ein Außenläufer ist. 6. Electric vehicle coolant pump according to claim 5, characterized in that the motor rotor (22) is an external rotor.
7. Elektrische KFZ-Kühlmittelpumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Auslassöffnungen (33) im äußersten Bereich des Laufradorgans beziehungsweise im Falle einer topfförmigen Ausbildung des Motorrotors (22) Im Laufradorgan (9) oder im zylinderförmigen Antriebsorgan (20) im Bereich des Übergangs vom Laufradorgan (9) zum Antriebsorgan (20), vorgesehen sind. 7. Electrical motor vehicle coolant pump according to one of the preceding claims, characterized in that the outlet openings (33) in the outermost region of the impeller or in the case of a cup-shaped design of the motor rotor (22) in the impeller member (9) or in the cylindrical drive member (20) in Area of the transition from the impeller member (9) to the drive member (20), are provided.
8. Elektrische KFZ-Kühlmittelpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Motoreinheit (6) ein elektronisch kommutierter Elektromotor ist. 8. Electric vehicle coolant pump according to one of the preceding claims, characterized in that the motor unit (6) is an electronically commutated electric motor.
9. Elektrische KFZ-Kühlmittelpumpe nach einem der Ansprüche 5 - 7, dadurch gekennzeichnet, dass die Einlassöffnung (30) als ringförmiger Spalt zwischen dem Gehäuse (4) und dem zylinderförmigen Antriebsorgan (20) ausgeführt ist. 9. Electric motor vehicle coolant pump according to one of claims 5-7, characterized in that the inlet opening (30) is designed as an annular gap between the housing (4) and the cylindrical drive member (20).
EP17768126.9A 2016-11-25 2017-09-18 Motor vehicle electric coolant pump Active EP3545196B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016122784.6A DE102016122784A1 (en) 2016-11-25 2016-11-25 Electric vehicle coolant pump
PCT/EP2017/073387 WO2018095607A1 (en) 2016-11-25 2017-09-18 Electric motor-vehicle coolant pump

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EP3545196A1 true EP3545196A1 (en) 2019-10-02
EP3545196B1 EP3545196B1 (en) 2022-04-13

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US (1) US11162511B2 (en)
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CN (1) CN109983232B (en)
DE (1) DE102016122784A1 (en)
WO (1) WO2018095607A1 (en)

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CN109983232A (en) 2019-07-05
US20190353166A1 (en) 2019-11-21
DE102016122784A1 (en) 2018-05-30
US11162511B2 (en) 2021-11-02
EP3545196B1 (en) 2022-04-13
CN109983232B (en) 2021-12-14
WO2018095607A1 (en) 2018-05-31

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