EP1536139A1 - Pump unit with a gear pump and an electric motor - Google Patents

Pump unit with a gear pump and an electric motor Download PDF

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Publication number
EP1536139A1
EP1536139A1 EP04018790A EP04018790A EP1536139A1 EP 1536139 A1 EP1536139 A1 EP 1536139A1 EP 04018790 A EP04018790 A EP 04018790A EP 04018790 A EP04018790 A EP 04018790A EP 1536139 A1 EP1536139 A1 EP 1536139A1
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EP
European Patent Office
Prior art keywords
pump
rotor
electric motor
shaft
stator
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Granted
Application number
EP04018790A
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German (de)
French (fr)
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EP1536139B1 (en
Inventor
Franz Arbogast
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Voith Turbo GmbH and Co KG
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Voith Turbo GmbH and Co KG
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Publication of EP1536139A1 publication Critical patent/EP1536139A1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/008Enclosed motor pump units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/08Cooling; Heating; Preventing freezing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/008Prime movers

Definitions

  • the invention relates to a pump unit which a gear pump and having an electric motor in a common housing.
  • Such a pump unit is also used as a motor pump or Motor pump unit referred to.
  • a motor pump unit which in the The preamble of claim 1 combined features is through the published patent application DE 100 15 139 A1 describes and is for the better Understanding the present invention in Figure 1 shown. This is in the 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 cup shape and is in axial section seen 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 is 2 from the rotor 1.1 and the Stator 1.2 of the electric motor 1 completely enclosed.
  • the web 1.1.1 of the rotor 1 has a hole with a Internal toothing, which with an external toothing of the pump shaft 2.1 combs.
  • the pump shaft 2.1 carries a pinion 2.2, which with a internally toothed ring gear 2.3 meshes, the eccentric to the pinion 2.2 within of the rotor 1.1 of the electric motor 1 is arranged.
  • Axially on both sides of the ring gear 2.3 side windows 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 in an end face of the housing 4 is provided.
  • a Pumpmediumauslass 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 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 invention is based on the object, a motor-pump unit of developed in the manner described above such that even in a small Delivery volume and low pressure an optimal and therefore cost-effective Construction volume is achieved.
  • the solution according to the invention is based on the knowledge of the inventor that the insufficient building volume essentially due to an unfavorable ratio of Motor diameter is caused to the motor length. Accordingly, the Inventor further developed the known design of the pump such that the Ratio of motor diameter and motor length are made smaller can.
  • This possibility is in the pump unit according to the invention thereby ensuring that the rotor of the electric motor end face to the pinion and the ring gear of the pump is arranged.
  • the drive connection between Electric motor and pump is made by connecting the pump with a extended pump shaft is fitted, which in the rotor of the electric motor protrudes.
  • the rotor of the electric motor is on a section of extended pump shaft preferably flying, rotatably mounted. You could the arrangement of the pump axially displaced next to the rotor of the electric motor on a common wave also called tandem construction.
  • the inventive design can achieve many advantages or maintained, such as the only small required space of the pump unit, the formation of the engine and the Pump to an integral unit, cooling the engine through the Pumping medium, which is in particular a hydraulic oil, the comparatively high Sound level reduction as well as the possibility of both units, that is pump and Engine, to be able to test separately.
  • the invention is Pump unit free from any radial shaft seals, fan noise, Roller bearings as well as separate pump carriers and elastic couplings.
  • the rotor of the electric motor via a Mitticianver Wegung on its front side or in the area of his Front side torsionally rigid connected to the pump shaft. It comes in particular the front side of the rotor for the torsionally rigid connection into consideration, which in Relative to the pump is located, that is, which the pump secluded side is.
  • the pump shaft with a Be provided shaft journal, which carries an external toothing, which with the Rotor of the motor or a rotor mounted in the disc meshes.
  • the pump 2 is no longer complete, but only partially within the stator 1.2 of the electric motor. 1 arranged, and only within the one axial end of the Stator winding 1.2.2 and completely out of the axial range of Stator laminations 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 area 2.1.2 is the Pump shaft 2.1 stored within the pump 2, preferably by the Bearings 2.4.1 and 2.5.1 on both sides of the pump shaft 2.1 worn pinion 2.2.
  • the area 2.1.1 of the pump shaft 2.1, which with formed 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 shown or spacer sleeves 8 and 9.
  • the rotor 1.1 of the electric motor 1 is thus flying on the pump shaft 2.1 stored.
  • 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 has preferably a smaller diameter than the pump shaft 2.1 in the area the discs 20 and 21, at least in the region of the disc 21, or a at most equal diameter. This is for assembly reasons necessary. Namely, when mounting the disc 21 from the right to the Shaft section 2.1.1 postponed, and then on the right section of Pump shaft 2.1.
  • the torsionally rigid connection between the rotor 1.1 and pump shaft 2.1 is through made a non-rotatable connection 7.
  • This is as an external toothing on one Achszapfen formed at the end of the pump shaft 2.1, which is the opposite pump end.
  • On this journal which the has smallest diameter of the pump shaft 2.1, is a driving plate 10 pushed with an internal toothing or feather key, which in a mechanical engagement with the rotor 1.1 stands. Because of that Internal toothing of the driving plate 10 and the external toothing of the Combing axle journal, the drive power of the rotor 1.1 is on the pump shaft 2.1 and thus to the pinion 2.2 and the eccentric to this Ring gear 2.3 transmitted.
  • the line of the pumping medium through the housing 4 is indicated by the arrows shown.
  • the pumping medium passes through one Pump medium inlet 5 in a first end 4.1 of the housing 4 in axial A direction, distributed in the circumferential direction in an annular channel 11, which the encloses first end of the winding 1.2.2 of the stator 1.2, and flows then in the axial direction along the stator 1.2 through an annular gap between the stator 1.2 and the rotor 1.1.
  • radially inside the Ringpaltes axial bores 12 provided in the rotor 1.1 through which the Pump medium is passed. After the pumping medium axially through the Rotor 1.1 has passed, it flows into a second annular channel 13 on the other side of the rotor 1.1, which the second axial end of the winding 1.2.2 and the pump 2 encloses.
  • 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 internally toothed ring gear 2.3, compressed and axially through the Pumpmediumauslass 6 promoted out of 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)

Abstract

The pump assembly has an electric motor (1) whose rotor (1.1) is mounted at the end relative to the pinion (2.2) and hollow wheel (2.3) and is rotationally secured to a section (2.1.1) of the pump shaft which is extended axially in the direction of the rotor. The rotor is mounted with a unilateral bearing by the section of the pump shaft. The common housing (4) has two axially opposed end sides of which one has a pump medium inlet (5) and the other has a pump medium outlet (6). The pump medium pipe is formed by the inside of the housing so that the pump medium is delivered from the inlet (5) axially along the stator through an interspace between rotor and stator, through the pump and then further axially from the pump medium outlet.

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 a gear pump and having 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 used as a motor pump or Motor pump unit referred to. A motor pump unit, which in the The preamble of claim 1 combined features is through the published patent application DE 100 15 139 A1 describes and is for the better Understanding the present invention in Figure 1 shown. This is in the Explained in detail below:

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 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 cup shape and is in axial section seen U-shaped.

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 pump 2 is arranged. As you can see, this pump is 2 from the rotor 1.1 and the Stator 1.2 of the electric motor 1 completely enclosed.

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. To a drive connection between the rotor 1.1 and the pump shaft 2.1 produce, the web 1.1.1 of the rotor 1 has a hole with a Internal toothing, which with an external toothing of the pump shaft 2.1 combs. The pump shaft 2.1 carries a pinion 2.2, which with a internally toothed ring gear 2.3 meshes, the eccentric to the pinion 2.2 within of the rotor 1.1 of the electric motor 1 is arranged. Axially on both sides of the ring gear 2.3 side windows 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.

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 is a pumping medium inlet 5 in an end face of the housing 4 is provided. For discharging the pumping medium is a Pumpmediumauslass 6 provided in the same end face of the housing.

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.DE 1 553 116 A describes an electric motor and an oil feed pump. The rotor 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.

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 indeed easy to manufacture and compact proved. However, it has been found that for certain pump data, for Example with a small delivery volume and a 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 is based on the object, a motor-pump unit of developed in the manner described above such that even in a small Delivery volume and low pressure an optimal and therefore cost-effective Construction 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 Characteristics of claim 1 solved. The subclaims describe particularly advantageous developments of the invention.

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 building volume essentially due to an unfavorable ratio of Motor diameter is caused to the motor length. Accordingly, the Inventor further developed the known design of the pump such that the Ratio of motor diameter and motor length are made smaller can. This possibility is in the pump unit according to the invention thereby ensuring that the rotor of the electric motor end face to the pinion and the ring gear of the pump is arranged. The drive connection between Electric motor and pump is made by connecting the pump with a extended pump shaft is fitted, which in the rotor of the electric motor protrudes. The rotor of the electric motor is on a section of extended pump shaft preferably flying, rotatably mounted. You could the arrangement of the pump axially displaced next to the rotor of the electric motor on a common wave also called tandem construction.

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 can achieve many advantages or maintained, such as the only small required space of the pump unit, the formation of the engine and the Pump to an integral unit, cooling the engine through the Pumping medium, which is in particular a hydraulic oil, the comparatively high Sound level reduction as well as the possibility of both units, that is pump and Engine, to be able to test separately. In particular, the invention is Pump unit free from any radial shaft seals, fan noise, Roller bearings as well as 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 advantageous is the rotor of the electric motor via a Mitnahmeverzahnung on its front side or in the area of his Front side torsionally rigid connected to the pump shaft. It comes in particular the front side of the rotor for the torsionally rigid connection into consideration, which in Relative to the pump is located, that is, which the pump secluded side is. For example, the pump shaft with a Be provided shaft journal, which carries an external toothing, which with the Rotor of the motor or a rotor mounted in the disc meshes.

Eine besonders vorteilhafte Ausführungsform der Erfindung wird nachfolgend anhand der Figur 2 beschrieben.A particularly advantageous embodiment of the invention will be below described 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 you can see, according to this embodiment, the pump 2 is no longer complete, but only partially within the stator 1.2 of the electric motor. 1 arranged, and only within the one axial end of the Stator winding 1.2.2 and completely out of the axial range of Stator laminations 1.2.1.

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 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. In the area 2.1.2 is the Pump shaft 2.1 stored within the pump 2, preferably by the Bearings 2.4.1 and 2.5.1 on both sides of the pump shaft 2.1 worn pinion 2.2. The area 2.1.1 of the pump shaft 2.1, which with formed 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 shown or spacer sleeves 8 and 9. The rotor 1.1 of the electric motor 1 is thus flying on the pump shaft 2.1 stored.

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 can be seen, 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 has preferably a smaller diameter than the pump shaft 2.1 in the area the discs 20 and 21, at least in the region of the disc 21, or a at most equal diameter. This is for assembly reasons necessary. Namely, when mounting the disc 21 from the right to the Shaft section 2.1.1 postponed, and then on the right section of 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 pump shaft 2.1 is through made a non-rotatable connection 7. This is as an external toothing on one Achszapfen formed at the end of the pump shaft 2.1, which is the opposite pump end. On this journal, which the has smallest diameter of the pump shaft 2.1, is a driving plate 10 pushed with an internal toothing or feather key, which in a mechanical engagement with the rotor 1.1 stands. Because of that Internal toothing of the driving plate 10 and the external toothing of the Combing axle journal, the drive power of the rotor 1.1 is on the pump shaft 2.1 and thus to the pinion 2.2 and the eccentric to this Ring gear 2.3 transmitted.

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 housing 4 is indicated by the arrows shown. As you can see, the pumping medium passes through one Pump medium inlet 5 in a first end 4.1 of the housing 4 in axial A direction, distributed in the circumferential direction in an annular channel 11, which the encloses first end of the winding 1.2.2 of the stator 1.2, and flows then in the axial direction along the stator 1.2 through an annular gap between the stator 1.2 and the rotor 1.1. In addition, radially inside the Ringpaltes axial bores 12 provided in the rotor 1.1, through which the Pump medium is passed. After the pumping medium axially through the Rotor 1.1 has passed, it flows into a second annular channel 13 on the other side of the rotor 1.1, which the second axial end of the winding 1.2.2 and the pump 2 encloses.

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.From this second annular channel 13, 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 internally toothed ring gear 2.3, compressed and axially through the Pumpmediumauslass 6 promoted out of the housing 4 out.

Claims (2)

Pumpenaggregat 1.1 mit einem Elektromotor (1), umfassend einen Rotor (1.1) und einen Stator (1.2); 1.2 mit einer Pumpe (2), die ein Pumpmedium, insbesondere eine Flüssigkeit fördert; 1.3 die Pumpe (2) wird durch den Elektromotor (1) angetrieben; 1.4 der Elektromotor (1) und die Pumpe (2) sind von einem gemeinsamen Gehäuse (4) umschlossen; 1.5 die Pumpe (2) ist zumindest teilweise radial innerhalb des Stators (1.2) des Elektromotors (1) angeordnet; 1.6 die Pumpe (2) weist eine Welle (2.1) auf, welche mit einem Ritzel (2.2) versehen ist, welches mit einem gegenüber dem Ritzel (2.2) exzentrischen Hohlrad (2.3) kämmt;
gekennzeichnet durch die folgenden Merkmale:
1.7 der Rotor (1.1) des Elektromotors (1) ist stirnseitig zu dem Ritzel (2.2) und dem Hohlrad (2.3) der Pumpe (2) angeordnet und ist mit einem Abschnitt (2.1.1) der axial in Richtung des Rotors (1.1) verlängerten Pumpenwelle drehfest; 1.8 der Rotor (1.1) des Elektromotors (1) ist vom Abschnitt (2.1.1) der Pumpenwelle (2.1) fliegend gelagert; 1.9 das gemeinsame Gehäuse (4) weist zwei axial gegenüberstehende Stirnseiten (4.1, 4.2) auf, deren erste (4.1) mit einem Pumpmediumeinlass (5) und deren zweite (4.2) mit einem Pumpmediumauslass (6) versehen ist, und 1.10 die Pumpmediumleitung durch das Innere des Gehäuses (4) ist derart ausgebildet, dass das Pumpmedium von dem Pumpmediumeinlass (5) axial entlang des Stators (1.2), insbesondere durch einen ringförmigen Zwischenraum zwischen dem Rotor (1.1) und dem Stator (1.2) des Elektromotors (1), durch die Pumpe (2) und weiter axial aus dem Pumpmediumauslass (6) heraus gefördert wird.
pump unit 1.1 with an electric motor (1) comprising a rotor (1.1) and a stator (1.2); 1.2 with a pump (2), which promotes 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 at least partially radially disposed within 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 a relative to the pinion (2.2) eccentric ring gear (2.3);
characterized by the following features:
1.7 the rotor (1.1) of the electric motor (1) is arranged frontally to the pinion (2.2) and the ring gear (2.3) of the pump (2) and is provided with a portion (2.1.1) of axially in the direction of the rotor (1.1) extended pump shaft rotationally fixed; 1.8 the rotor (1.1) of the electric motor (1) is cantilevered from the section (2.1.1) of the pump shaft (2.1); 1.9 the common housing (4) has two axially opposite end faces (4.1, 4.2), the first (4.1) with a pumping medium inlet (5) and the second (4.2) is provided with a Pumpmediumauslass (6), and 1.10 the pumping medium line through the interior of the housing (4) is formed such that the pumping medium from the pumping medium inlet (5) axially along the stator (1.2), in particular by an annular space between the rotor (1.1) and the stator (1.2) of Electric motor (1), by the pump (2) and further axially from the pumping medium outlet (6) out is promoted.
Pumpenaggregat gemäß Anspruch 1, dadurch gekennzeichnet, dass der Rotor (1.1) des Elektromotors (1) über eine Mitnahmeverzahnung (7) im Bereich der Stirnseite des Rotors (1.1), insbesondere im Bereich der von der Pumpe (2) entfernt angeordneten Stirnseite des Rotors (1.1) die Pumpenwelle (2.1) antreibt, wobei die Mitnahmeverzahnung (7) mit der Welle (2.1) der Pumpe (2) kämmt.Pump unit according to claim 1, characterized in that the rotor (1.1) of the electric motor (1) via a driving toothing (7) in the region of the end face of the rotor (1.1), in particular in the region of the pump (2) remote from the end face of the rotor (1.1) drives the pump shaft (2.1), wherein the driving toothing (7) with the shaft (2.1) of the pump (2) meshes.
EP04018790A 2003-11-20 2004-08-07 Pump unit with a gear pump and an electric motor Expired - Lifetime EP1536139B1 (en)

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)

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EP1536139A1 true EP1536139A1 (en) 2005-06-01
EP1536139B1 EP1536139B1 (en) 2006-03-01

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US (1) US7367787B2 (en)
EP (1) EP1536139B1 (en)
DE (2) DE10354312A1 (en)

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US12031559B1 (en) 2023-07-07 2024-07-09 Robert Bosch Gmbh Integrated electro-hydraulic unit

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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
DE102022128264A1 (en) * 2022-10-25 2024-04-25 Valeo Powertrain Gmbh Gear pump

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US12031559B1 (en) 2023-07-07 2024-07-09 Robert Bosch Gmbh Integrated electro-hydraulic unit

Also Published As

Publication number Publication date
EP1536139B1 (en) 2006-03-01
US7367787B2 (en) 2008-05-06
US20050152790A1 (en) 2005-07-14
DE502004000320D1 (en) 2006-04-27
DE10354312A1 (en) 2005-06-23

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