EP1536139B1 - Pump unit with a gear pump and an electric motor - Google Patents
Pump unit with a gear pump and an electric motor Download PDFInfo
- Publication number
- EP1536139B1 EP1536139B1 EP04018790A EP04018790A EP1536139B1 EP 1536139 B1 EP1536139 B1 EP 1536139B1 EP 04018790 A EP04018790 A EP 04018790A EP 04018790 A EP04018790 A EP 04018790A EP 1536139 B1 EP1536139 B1 EP 1536139B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- rotor
- electric motor
- shaft
- stator
- 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.)
- Expired - Lifetime
Links
- 238000005086 pumping Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims 1
- 238000004804 winding Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
Images
Classifications
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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
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/008—Enclosed motor pump units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/08—Cooling; Heating; Preventing freezing
-
- 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
Definitions
- the invention relates to a pump unit which has a gear pump and an electric motor in a common housing.
- Such a pump unit is also referred to as a motor pump or motor pump unit.
- a motor pump unit which has the features summarized in the preamble of claim 1, is described by the published patent application DE 100 15 139 A1 and is shown in the figure 1 for a better understanding of the present invention. This will be explained in detail below:
- the motor pump unit comprises an electric motor 1 with a rotor 1.1 and a stator 1.2.
- the stator 1.2 has a laminated stator core 1.2.1 and a winding 1.2.2.
- the rotor 1.1 has a pot shape and is seen in axial section U-shaped.
- a pump 2 Radially inside the rotor 1.1 and the stator 1.2, a pump 2 is arranged. As you can see, this pump 2 is completely enclosed by the rotor 1.1 or the stator 1.2 of the electric motor 1.
- the web 1.1.1 of the rotor 1 has a bore with an internal toothing, which meshes with an external toothing of the pump shaft 2.1.
- the pump shaft 2.1 carries a pinion 2.2, which meshes with an internally toothed ring gear 2.3, which is arranged eccentrically to the pinion 2.2 within the rotor 1.1 of the electric motor 1.
- Axially on both sides of the ring gear 2.3 side discs 2.4 and 2.5 of the pump 2 are arranged, in which the pump shaft 2.1 is rotatably supported by plain bearings 2.4.1 and 2.5.1.
- a pumping medium inlet 5 is provided in an end face of the housing 4.
- a pumping medium outlet 6 is provided in the same end face of the housing.
- DE 1 553 116 A describes an electric motor and an oil feed pump.
- the rotor of the motor and the impeller of the pump sit on a common shaft.
- the shaft is mounted on both sides of the rotor in two bearings.
- the embodiment shown has proven to be easy to manufacture and compact. It has been found, however, that with certain pump data, for example a small delivery volume and low pressure, the ratio of motor dimensions to pump dimensions is unfavorable.
- the invention has for its object to further develop a motor-pump unit of the type described above such that even at low flow and low pressure an optimal and thus cost-effective volume is achieved.
- the solution according to the invention is based on the knowledge of the inventor that the insufficient volume of construction is essentially caused by an unfavorable ratio of motor diameter to motor length. Accordingly, the inventor has further developed the known design of the pump so that the ratio of the engine diameter and the engine length can be made smaller.
- This possibility is ensured in the pump unit according to the invention characterized in that the rotor of the electric motor is arranged frontally to the pinion and the ring gear of the pump.
- the drive connection between the electric motor and pump is made by the fact that the pump is equipped with an extended pump shaft, which in the rotor of the electric motor protrudes.
- the rotor of the electric motor is preferably on a portion of the extended pump shaft flying, rotatably mounted.
- the inventive design many advantages can be achieved or maintained, such as the only small required space of the pump unit, the formation of the motor and the pump to an integral unit, the cooling of the motor by the pumping medium, which is in particular a hydraulic oil, the comparatively high noise level reduction and the ability to separately test both units, ie pump and motor.
- the pump unit according to the invention is free of any radial shaft seals, fan noise, roller bearings and separate pump carriers and elastic couplings.
- the rotor of the electric motor is connected via a driving teeth on its front side or in the region of its end face torsionally rigid with the pump shaft.
- the front side of the rotor for the torsionally rigid connection is considered, which is located in relation to the pump away, that is, which is the side remote from the pump side.
- the pump shaft may be provided with a shaft journal which carries an outer toothing, which meshes with the rotor of the motor or a disc mounted in the rotor.
- the pump 2 is no longer complete, but only partially disposed within the stator 1.2 of the electric motor 1, only within the one axial end of the stator winding 1.2.2 and completely outside the axial region of the stator lamination 1.2 .1.
- the shaft 2.1 of the pump 2 has two sections, a first section 2.1.1, which is associated with the rotor 1.1 of the electric motor, and a second section 2.1.2, which is assigned to the pump 2.
- the pump shaft 2.1 is supported inside the pump 2, preferably by the plain bearings 2.4.1 and 2.5.1 on both sides of the pinion 2.2 supported by the pump shaft 2.1.
- the area 2.1.1 of the pump shaft 2.1 which is formed with a comparatively smaller diameter than the range 2.1.2, is completely enclosed by the hollow cylindrical rotor 1.1 and carries the rotor 1.1, for example by the spacers or spacer sleeves 8 and 9 shown Rotor 1.1 of the electric motor 1 is thus cantilevered on the pump shaft 2.1.
- the pump shaft 2.1 is mounted in two discs 20, 21, between which the pinion is 2.2.
- the shaft section 2.1.1 preferably has a smaller diameter than the pump shaft 2.1 in the region of the disks 20 and 21, at least in the region of the disk 21, or a diameter of at most equal diameter. This is necessary for assembly reasons. During assembly, namely, the disc 21 is pushed from the right onto the shaft section 2.1.1, and then to the right section of the pump shaft 2.1.
- the torsionally rigid connection between the rotor 1.1 and the pump shaft 2.1 is produced by a rotationally fixed connection 7.
- This is formed as an external toothing on a journal at the end of the pump shaft 2.1, which is opposite to the pump end.
- a driving plate 10 is pushed with an internal toothing or feather key, which is in mechanical engagement with the rotor 1.1.
- the drive power of the rotor 1.1 is transmitted to the pump shaft 2.1 and thus to the pinion 2.2 and to this eccentric ring gear 2.3.
- the line of the pumping medium through the housing 4 is shown by the arrows.
- the pumping medium enters through a pumping medium inlet 5 in a first end face 4.1 of the housing 4 in the axial direction, distributed in the circumferential direction in an annular channel 11, which encloses the first end of the winding 1.2.2 of the stator 1.2, and then flows in the axial direction along the stator 1.2 through an annular gap between the stator 1.2 and the rotor 1.1.
- axial bores 12 are provided radially inside the annular gap 12 in the rotor 1.1, through which the pumping medium is passed. After the pumping medium has passed axially through the rotor 1.1, it flows into a second annular channel 13 on the other side of the rotor 1.1, which encloses the second axial end of the winding 1.2.2 and the pump 2.
- the pumping medium is passed into the pump 2, there by the gear pump, that is, the meshing engagement of the pinion 2.2 in the internal gear ring 2.3, compressed and axially conveyed by the pumping medium 6 from the housing 4 out.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Description
Die Erfindung betrifft ein Pumpenaggregat, welches eine Zahnradpumpe und einen Elektromotor in einem gemeinsamen Gehäuse aufweist.The invention relates to a pump unit which has a gear pump and an electric motor in a common housing.
Ein solches Pumpenaggregat wird auch als Motorpumpe oder Motorpumpenaggregat bezeichnet. Ein Motorpumpenaggregat, welches die im Oberbegriff von Anspruch 1 zusammengefassten Merkmale aufweist, wird durch die Offenlegungsschrift DE 100 15 139 A1 beschrieben und ist zum besseren Verständnis der vorliegenden Erfindung in der Figur 1 gezeigt. Diese wird im Nachfolgenden im einzelnen erläutert:Such a pump unit is also referred to as a motor pump or motor pump unit. A motor pump unit, which has the features summarized in the preamble of
Das Motorpumpenaggregat umfasst einen Elektromotor 1 mit einem Rotor 1.1 und einem Stator 1.2. Der Stator 1.2 weist ein Statorblechpaket 1.2.1 und eine Wicklung 1.2.2 auf. Der Rotor 1.1 weist eine Topfform auf und ist im Axialschnitt gesehen U-förmig.The motor pump unit comprises an
Radial innerhalb des Rotors 1.1 und des Stators 1.2 ist eine Pumpe 2 angeordnet. Wie man sieht, wird diese Pumpe 2 von dem Rotor 1.1 beziehungsweise dem Stator 1.2 des Elektromotors 1 vollständig umschlossen.Radially inside the rotor 1.1 and the stator 1.2, a
Um eine Triebverbindung zwischen dem Rotor 1.1 und der Pumpenwelle 2.1 herzustellen, weist der Steg 1.1.1 des Rotors 1 eine Bohrung mit einer Innenverzahnung auf, welche mit einer Außenverzahnung der Pumpenwelle 2.1 kämmt. Die Pumpenwelle 2.1 trägt ein Ritzel 2.2, welches mit einem innenverzahnten Hohlrad 2.3 kämmt, das exzentrisch zu dem Ritzel 2.2 innerhalb des Rotors 1.1 des Elektromotors 1 angeordnet ist. Axial beidseitig des Hohlrades 2.3 sind Seitenscheiben 2.4 und 2.5 der Pumpe 2 angeordnet, in welchen die Pumpenwelle 2.1 durch Gleitlager 2.4.1 und 2.5.1 drehbar gelagert ist.In order to produce a drive connection between the rotor 1.1 and the pump shaft 2.1, the web 1.1.1 of the
Zum Zuführen des Pumpmediums ist ein Pumpmediumeinlass 5 in einer Stirnseite des Gehäuses 4 vorgesehen. Zum Abführen des Pumpmediums ist ein Pumpmediumauslass 6 in derselben Stirnseite des Gehäuses vorgesehen.For supplying the pumping medium, a
DE 1 553 116 A beschreibt einen Elektromotor und eine Ölförderpumpe. Der Rotor des Motors und das Laufrad der Pumpe sitzen auf einer gemeinsamen Welle. Die Welle ist beidseits des Rotors in zwei Lagern gelagert.
Die gezeigte Ausführung hat sich zwar als leicht herstellbar und kompakt erwiesen. Man hat jedoch festgestellt, dass bei bestimmten Pumpendaten, zum Beispiel bei einem kleinen Fördervolumen und einem niedrigen Druck, das Verhältnis Motorabmessungen zu Pumpenabmessungen ungünstig ist.The embodiment shown has proven to be easy to manufacture and compact. It has been found, however, that with certain pump data, for example a small delivery volume and low pressure, the ratio of motor dimensions to pump dimensions is unfavorable.
Der Erfindung liegt die Aufgabe zugrunde, eine Motor-Pumpeneinheit der eingangs beschriebenen Art derart weiterzuentwickeln, dass auch bei kleinem Fördervolumen und niedrigem Druck ein optimales und somit kostengünstiges Bauvolumen erreicht wird.The invention has for its object to further develop a motor-pump unit of the type described above such that even at low flow and low pressure an optimal and thus cost-effective volume is achieved.
Die erfindungsgemäße Aufgabe wird durch ein Pumpenaggregat mit den Merkmalen des Anspruchs 1 gelöst. Die Unteransprüche beschreiben besonders vorteilhafte Weiterbildungen der Erfindung.The object of the invention is achieved by a pump unit with the features of
Die erfindungsgemäße Lösung beruht auf der Erkenntnis des Erfinders, dass das unzureichende Bauvolumen im wesentlichen durch ein ungünstiges Verhältnis von Motordurchmesser zur Motorlänge verursacht wird. Dementsprechend hat der Erfinder die bekannte Ausführung der Pumpe derart weiterentwickelt, dass das Verhältnis von Motordurchmesser und Motorlänge kleiner ausgeführt werden kann. Diese Möglichkeit wird bei dem erfindungsgemäßen Pumpenaggregat dadurch sichergestellt, dass der Rotor des Elektromotors stirnseitig zu dem Ritzel und dem Hohlrad der Pumpe angeordnet ist. Die Triebverbindung zwischen Elektromotor und Pumpe wird dadurch hergestellt, dass die Pumpe mit einer verlängerten Pumpenwelle ausgestattet ist, welche in den Rotor des Elektromotors hineinragt. Der Rotor des Elektromotors ist dabei auf einem Abschnitt der verlängerten Pumpenwelle vorzugsweise fliegend, drehstarr gelagert. Man könnte die Anordnung der Pumpe axial verschoben neben dem Rotor des Elektromotors auf einer gemeinsamen Welle auch als Tandembauweise bezeichnen.The solution according to the invention is based on the knowledge of the inventor that the insufficient volume of construction is essentially caused by an unfavorable ratio of motor diameter to motor length. Accordingly, the inventor has further developed the known design of the pump so that the ratio of the engine diameter and the engine length can be made smaller. This possibility is ensured in the pump unit according to the invention characterized in that the rotor of the electric motor is arranged frontally to the pinion and the ring gear of the pump. The drive connection between the electric motor and pump is made by the fact that the pump is equipped with an extended pump shaft, which in the rotor of the electric motor protrudes. The rotor of the electric motor is preferably on a portion of the extended pump shaft flying, rotatably mounted. One could designate the arrangement of the pump axially displaced next to the rotor of the electric motor on a common shaft as a tandem design.
Durch die erfindungsgemäße Ausführung können viele Vorteile erreicht beziehungsweise beibehalten werden, wie zum Beispiel der nur kleine erforderliche Bauraum des Pumpenaggregats, die Ausbildung des Motors und der Pumpe zu einer integralen Einheit, die Kühlung des Motors durch das Pumpmedium, welches insbesondere ein Hydrauliköl ist, die vergleichsweise hohe Schallpegelreduktion sowie die Möglichkeit, beide Einheiten, das heißt Pumpe und Motor, separat prüfen zu können. Insbesondere ist das erfindungsgemäße Pumpenaggregat frei von jeglichen radialen Wellendichtringen, Lüftergeräuschen, Rollenlagern sowie gesonderten Pumpenträgern und elastischen Kupplungen.The inventive design many advantages can be achieved or maintained, such as the only small required space of the pump unit, the formation of the motor and the pump to an integral unit, the cooling of the motor by the pumping medium, which is in particular a hydraulic oil, the comparatively high noise level reduction and the ability to separately test both units, ie pump and motor. In particular, the pump unit according to the invention is free of any radial shaft seals, fan noise, roller bearings and separate pump carriers and elastic couplings.
Besonders vorteilhaft ist der Rotor des Elektromotors über eine Mitnahmeverzahnung an seiner Stirnseite beziehungsweise im Bereich seiner Stirnseite drehstarr mit der Pumpenwelle verbunden. Dabei kommt insbesondere die Stirnseite des Rotors für die drehstarre Verbindung in Betracht, welche im Verhältnis zur Pumpe entfernt gelegen ist, das heißt, welche die von der Pumpe abgelegene Seite ist. Beispielsweise kann die Pumpenwelle mit einem Wellenzapfen versehen sein, der eine Außenverzahnung trägt, welche mit dem Rotor des Motors beziehungsweise einer im Rotor gelagerten Scheibe kämmt.Particularly advantageously, the rotor of the electric motor is connected via a driving teeth on its front side or in the region of its end face torsionally rigid with the pump shaft. In particular, the front side of the rotor for the torsionally rigid connection is considered, which is located in relation to the pump away, that is, which is the side remote from the pump side. For example, the pump shaft may be provided with a shaft journal which carries an outer toothing, which meshes with the rotor of the motor or a disc mounted in the rotor.
Eine besonders vorteilhafte Ausführungsform der Erfindung wird nachfolgend anhand der Figur 2 beschrieben.A particularly advantageous embodiment of the invention will be described below with reference to FIG.
Wie man sieht, ist gemäß dieser Ausführung die Pumpe 2 nicht mehr vollständig, sondern nur noch teilweise innerhalb des Stators 1.2 des Elektromotors 1 angeordnet, und zwar ausschließlich innerhalb des einen axialen Endes der Statorwicklung 1.2.2 und vollständig außerhalb des axialen Bereichs des Statorblechpakets 1.2.1.As can be seen, according to this embodiment, the
Die Welle 2.1 der Pumpe 2 weist zwei Abschnitte auf, einen ersten Abschnitt 2.1.1, welcher dem Rotor 1.1 des Elektromotors zugeordnet ist, und einen zweiten Abschnitt 2.1.2, welcher der Pumpe 2 zugeordnet ist. Im Bereich 2.1.2 ist die Pumpenwelle 2.1 innerhalb der Pumpe 2 gelagert, vorzugsweise durch die Gleitlager 2.4.1 und 2.5.1 auf beiden Seiten des durch die Pumpenwelle 2.1 getragenen Ritzels 2.2. Der Bereich 2.1.1 der Pumpenwelle 2.1, welcher mit einem vergleichsweise kleineren Durchmesser als der Bereich 2.1.2 ausgebildet ist, wird vollständig durch den hohlzylinderförmigen Rotor 1.1 umschlossen und trägt den Rotor 1.1, beispielsweise durch die gezeigten Abstandsstücke beziehungsweise Abstandshülsen 8 und 9. Der Rotor 1.1 des Elektromotors 1 ist somit fliegend auf der Pumpenwelle 2.1 gelagert.The shaft 2.1 of the
Wie man sieht, ist die Pumpenwelle 2.1 in zwei Scheiben 20, 21 gelagert, zwischen denen sich das Ritzel 2.2 befindet. Der Wellenabschnitt 2.1.1 hat vorzugsweise einen kleineren Durchmesser, als die Pumpenwelle 2.1 im Bereich der Scheiben 20 und 21, zumindest im Bereich der Scheibe 21, oder einen höchstens gleich großen Durchmesser. Dieses ist aus Montagegründen notwendig. Bei der Montage wird nämlich die Scheibe 21 von rechts her auf den Wellenabschnitt 2.1.1 aufgeschoben, und dann auf den rechten Abschnitt der Pumpenwelle 2.1.As you can see, the pump shaft 2.1 is mounted in two discs 20, 21, between which the pinion is 2.2. The shaft section 2.1.1 preferably has a smaller diameter than the pump shaft 2.1 in the region of the disks 20 and 21, at least in the region of the disk 21, or a diameter of at most equal diameter. This is necessary for assembly reasons. During assembly, namely, the disc 21 is pushed from the right onto the shaft section 2.1.1, and then to the right section of the pump shaft 2.1.
Die drehstarre Verbindung zwischen Rotor 1.1 und Pumpenwelle 2.1 wird durch eine drehfeste Verbindung 7 hergestellt. Diese ist als Außenverzahnung auf einem Achszapfen an dem Ende der Pumpenwelle 2.1 ausgebildet, welches dem pumpenseitigen Ende gegenüberliegt. Auf diesem Achszapfen, welcher den kleinsten Durchmesser der Pumpenwelle 2.1 aufweist, ist eine Mitnahmescheibe 10 mit einer Innenverzahnung oder Passfedermitnahme aufgeschoben, welche in einem mechanischen Eingriff mit dem Rotor 1.1 steht. Dadurch, dass die Innenverzahnung der Mitnahmescheibe 10 und die Außenverzahnung des Achszapfens miteinander kämmen, wird die Antriebsleistung des Rotors 1.1 auf die Pumpenwelle 2.1 und damit auf das Ritzel 2.2 und das zu diesem exzentrische Hohlrad 2.3 übertragen.The torsionally rigid connection between the rotor 1.1 and the pump shaft 2.1 is produced by a rotationally fixed
Die Leitung des Pumpmediums durch das Gehäuse 4 ist durch die Pfeile dargestellt. Wie man sieht, tritt das Pumpmedium durch einen Pumpmediumeinlass 5 in einer ersten Stirnseite 4.1 des Gehäuses 4 in axialer Richtung ein, verteilt sich in Umfangsrichtung in einem Ringkanal 11, welcher das erste Ende der Wicklung 1.2.2 des Stators 1.2 umschließt, und strömt anschließend in axialer Richtung entlang des Stators 1.2 durch einen Ringspalt zwischen dem Stator 1.2 und dem Rotor 1.1. Zusätzlich sind radial innerhalb des Ringspaltes Axialbohrungen 12 im Rotor 1.1 vorgesehen, durch welche das Pumpmedium durchgeleitet wird. Nachdem das Pumpmedium axial durch den Rotor 1.1 hindurchgetreten ist, strömt es in einen zweiten Ringkanal 13 auf der anderen Seite des Rotors 1.1, welcher das zweite axiale Ende der Wicklung 1.2.2 und die Pumpe 2 umschließt.The line of the pumping medium through the
Aus diesem zweiten Ringkanal 13 wird das Pumpmedium in die Pumpe 2 geleitet, dort durch die Zahnradpumpe, das heißt den kämmenden Eingriff des Ritzels 2.2 in dem innenverzahnten Hohlrad 2.3, verdichtet und axial durch den Pumpmediumauslass 6 aus dem Gehäuse 4 heraus gefördert.For this second
Claims (2)
- Pump unit1.1 with an electric motor (1), comprising a rotor (1.1) and a stator (1.2);1.2 with a pump (2) for conveying a pumping medium, in particular a liquid;1.3 the pump (2) is driven by the electric motor (1),1.4 the electric motor (1) and the pump (2) are enclosed by a common housing (4);1.5 the pump (2) is arranged at least partially radially inside of the stator (1.2) of the electric motor (1);1.6 the pump (2) has a shaft (2.1) which is provided with a pinion (2.2) which meshes with an intemal gear (2.3) that is eccentric relative to the pinion (2.2);
characterised by the following features:1.7 the rotor (1.1) of the electric motor (1) is arranged on an end side relative to the pinion (2.2) and internal gear (2.3) of the pump (2) and is rotation-fast with a section (2.1.1) of the pump shaft extended axially in the direction of the rotor (1.1);1.8 the rotor (1.1) of the electric motor (1) is cantilevered by the section (2.1.1) of the pump shaft (2.1);1.9 the common housing (4) has two axially opposite end sides (4.1, 4.2) the first end side (4.1) of which has an inlet for the pump medium (5) and the second end side (4.2) of which has an outlet for the pump medium (6), and1.10 the pump medium duct through the inside of the housing (4) is designed such that the pump medium is conveyed from the pump medium inlet (5) axially along the stator (1.2), in particular through an annular space between the rotor (1.1) and the stator (1.2) of the electric motor (1), through the pump (2) and further axially out of the pump medium outlet (6). - Pump unit according to claim 1, characterised in that the rotor (1.1) of the electric motor (1) drives the pump shaft (2.1) via a meshing gear (7) in the region of the end face of the rotor (1.1), in particular in the region of the end side of the rotor (1.1) remote from the pump (2), whereby the meshing gear (7) meshes with the shaft (2.1) of the pump (2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10354312 | 2003-11-20 | ||
| DE10354312A DE10354312A1 (en) | 2003-11-20 | 2003-11-20 | Pump unit with a gear pump and an electric motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1536139A1 EP1536139A1 (en) | 2005-06-01 |
| EP1536139B1 true EP1536139B1 (en) | 2006-03-01 |
Family
ID=34442269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04018790A Expired - Lifetime EP1536139B1 (en) | 2003-11-20 | 2004-08-07 | Pump unit with a gear pump and an electric motor |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7367787B2 (en) |
| EP (1) | EP1536139B1 (en) |
| DE (2) | DE10354312A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4361397A1 (en) * | 2022-10-25 | 2024-05-01 | Valeo Powertrain GmbH | Gear pump |
| US12140145B2 (en) | 2022-10-25 | 2024-11-12 | Valeo Powertrain Gmbh | Gear pump |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009018759A1 (en) * | 2009-04-27 | 2010-10-28 | Continental Automotive Gmbh | Pump-motor device for use in motor vehicle, has drive shaft rotatably supported in region of pump by two bearings, where drive shaft carries rotor of electric motor enclosed by stator on bearing region freely projecting into region of motor |
| US20110017848A1 (en) * | 2009-07-23 | 2011-01-27 | Keith Carl A | Sprayer technology |
| JP4896201B2 (en) * | 2009-10-26 | 2012-03-14 | 三菱電機株式会社 | Fuel supply device |
| DE202015105244U1 (en) * | 2015-10-05 | 2017-01-09 | Ebm-Papst St. Georgen Gmbh & Co. Kg | Pump-motor unit |
| DE102015015863A1 (en) * | 2015-12-09 | 2017-06-14 | Fte Automotive Gmbh | Electric motor driven liquid pump |
| DE102020122867A1 (en) * | 2020-09-01 | 2022-03-03 | Schwäbische Hüttenwerke Automotive GmbH | Pump-motor unit with integrated housing cover |
| US11990819B2 (en) | 2020-11-24 | 2024-05-21 | Bosch Rexroth Corporation | Electric and hydraulic machine |
| US12031559B1 (en) | 2023-07-07 | 2024-07-09 | Robert Bosch Gmbh | Integrated electro-hydraulic unit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1553116B2 (en) * | 1966-10-25 | 1971-07-15 | Licentia Patent Verwaltungs GmbH, 6000 Frankfurt | Electric motor-operated gear oil pump |
| DE1638188B1 (en) * | 1967-05-09 | 1971-05-06 | Danfoss As | ELECTRIC MOTOR DRIVEN PUMP FOR OIL BURNER |
| US5320501A (en) * | 1991-04-18 | 1994-06-14 | Vickers, Incorporated | Electric motor driven hydraulic apparatus with an integrated pump |
| US5220225A (en) * | 1992-06-17 | 1993-06-15 | Vickers, Incorporated | Integrated electric motor driven inline hydraulic apparatus |
| DE10015139A1 (en) * | 2000-03-29 | 2001-10-11 | Voith Turbo Kg | Motor pump unit |
-
2003
- 2003-11-20 DE DE10354312A patent/DE10354312A1/en not_active Withdrawn
-
2004
- 2004-08-07 EP EP04018790A patent/EP1536139B1/en not_active Expired - Lifetime
- 2004-08-07 DE DE502004000320T patent/DE502004000320D1/en not_active Expired - Lifetime
- 2004-11-18 US US10/991,741 patent/US7367787B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4361397A1 (en) * | 2022-10-25 | 2024-05-01 | Valeo Powertrain GmbH | Gear pump |
| US12140145B2 (en) | 2022-10-25 | 2024-11-12 | Valeo Powertrain Gmbh | Gear pump |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10354312A1 (en) | 2005-06-23 |
| US20050152790A1 (en) | 2005-07-14 |
| DE502004000320D1 (en) | 2006-04-27 |
| US7367787B2 (en) | 2008-05-06 |
| EP1536139A1 (en) | 2005-06-01 |
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