EP2122174B1 - Integrated internal gear pump with an electric motor - Google Patents

Integrated internal gear pump with an electric motor Download PDF

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Publication number
EP2122174B1
EP2122174B1 EP08773826A EP08773826A EP2122174B1 EP 2122174 B1 EP2122174 B1 EP 2122174B1 EP 08773826 A EP08773826 A EP 08773826A EP 08773826 A EP08773826 A EP 08773826A EP 2122174 B1 EP2122174 B1 EP 2122174B1
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EP
European Patent Office
Prior art keywords
ring
rotor
rotor pump
magnets
pump
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.)
Active
Application number
EP08773826A
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German (de)
French (fr)
Other versions
EP2122174A1 (en
Inventor
Willi Schneider
Torsten Helle
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.)
Joma Polytec GmbH
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Joma Polytec 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
Priority to DE102007035239A priority Critical patent/DE102007035239A1/en
Application filed by Joma Polytec GmbH filed Critical Joma Polytec GmbH
Priority to PCT/EP2008/005415 priority patent/WO2009012872A1/en
Publication of EP2122174A1 publication Critical patent/EP2122174A1/en
Application granted granted Critical
Publication of EP2122174B1 publication Critical patent/EP2122174B1/en
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Anticipated expiration legal-status Critical

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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
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • 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
    • 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
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084Toothed wheels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05CINDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00Metals
    • F05C2201/02Light metals
    • F05C2201/021Aluminium
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05CINDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00Synthetic polymers, e.g. plastics; Rubber

Description

  • Die Erfindung betrifft eine Rotorpumpe mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a rotor pump with the features of the preamble of claim 1.
  • Es ist allgemein bekannt, dass mittels Rotorpumpen Fluide gefördert und Gase auch komprimiert werden können. Hierfür wälzt sich in einem innenverzahnten Außenring ein außenverzahnter Innenring ab, wobei der Innenring exzentrisch zum Außenring steht und mittels eines geeigneten Antriebs angetrieben wird. Weist der Innenring z.B. fünf Zähne auf, dann wälzen diese sich zwischen sechs Zähnen des Außenrings ab. Pro Umdrehung des Innenrings wird das Fluid in fünf Arbeitskammern angesaugt und aus diesen dann verdrängt.It is generally known that fluids can be conveyed by means of rotor pumps and gases can also be compressed. For this purpose, an externally toothed inner ring rolls in an externally toothed outer ring, wherein the inner ring is eccentric to the outer ring and is driven by means of a suitable drive. If the inner ring has e.g. five teeth, then they roll between six teeth of the outer ring. Per revolution of the inner ring, the fluid is sucked into five working chambers and then displaced from them.
  • Aus der DE 299 13 367 U1 ist eine Innenzahnradpumpe dieser Art bekannt, bei der der Außenring mittels eines Hohlwellenmotors angetrieben wird. Um den Außenring ist der Permanentmagnete tragende Rotor des Hohlwellenmotors angeordnet, wobei der Außenring und der Rotor in geeigneter Weise miteinander verbunden sind, so dass der Rotor den Außenring antreiben kann. Als nachteilig wird angesehen, dass eine derartige Innenzahnradpumpe in radialer Richtung große Abmessungen besitzt und dass eine Vielzahl von Teilen benötigt und montiert werden müssen.From the DE 299 13 367 U1 an internal gear pump of this type is known in which the outer ring is driven by means of a hollow shaft motor. Arranged around the outer ring is the rotor of the hollow shaft motor carrying permanent magnets, wherein the outer ring and the rotor are connected to one another in a suitable manner, so that the rotor can drive the outer ring. A disadvantage is considered that such a Innenzahnradpumpe has large dimensions in the radial direction and that a large number of parts needed and must be mounted.
  • Aus der EP 1 803 938 A1 ist eine Rotorpumpe bekannt, bei der der Rotor des Antriebs mit dem Außenring gekoppelt ist. Antriebsmotor und Außenring stellen also zwei Bauteile dar, die miteinander verbunden werden müssen.From the EP 1 803 938 A1 a rotor pump is known in which the rotor of the drive is coupled to the outer ring. Drive motor and outer ring thus represent two components that need to be connected together.
  • Die JP 2 027 181 A offenbart alle Merkmale des Oberbegriffes von Anspruch 1 und zeigt eine Pumpe mit einem innenverzahnten Außenring mit in den Zähnen angeordneten Magneten.The JP 2 027 181 A discloses all the features of the preamble of claim 1 and shows a pump with an internally toothed outer ring with magnets arranged in the teeth.
  • Der Erfindung liegt die Aufgabe zugrunde, eine Rotorpumpe bereitzustellen, welche bei gleicher Förderleistung kleinere Abmessungen besitzt und die weniger Bauteile aufweist.The invention has for its object to provide a rotor pump, which has smaller dimensions with the same capacity and has fewer components.
  • Diese Aufgabe wird mit einer Rotorpumpe gelöst, die die Merkmale des Anspruchs 1 aufweist.This object is achieved with a rotor pump having the features of claim 1.
  • Die Integration des Rotors des Hohlwellenmotors in den Außenrings hat den wesentlichen Vorteil, dass ein Bauteil eingespart wird und dass gleichzeitig die radiale Abmessung reduziert werden kann. Neben der Einsparung von Bauteilen ist eine derartige Rotorpumpe auch leichter. Außerdem wird die Montage erleichtert, da kein Rotor mit dem Außenring verbunden werden muss. Der Innenring läuft lose um eine Achse mit. Von Vorteil ist, dass relativ große Rotations- oder Tangentialkräfte übertragen werden können, und es besteht keine die Gefahr, dass Vibrationen oder extreme Temperaturschwankungen ein Lösen des Rotors vom Außenring bewirken.The integration of the rotor of the hollow shaft motor in the outer ring has the significant advantage that a component is saved and that at the same time the radial dimension can be reduced. In addition to the savings of components, such a rotor pump is also easier. In addition, the assembly is facilitated because no rotor must be connected to the outer ring. The inner ring runs loosely around an axis. It is advantageous that relatively large rotational or tangential forces can be transmitted, and there is no danger that vibrations or extreme temperature fluctuations cause a detachment of the rotor from the outer ring.
  • Dabei sind zwischen den Zahnlücken oder in den Zähnen des Außenrings die Magnete für den Hohlwellenmotor angeordnet. Auch hierdurch wird die Baugröße vermindert, da der Platz innerhalb der Zähne dazu genutzt wird, die Magnete für den Hohlwellenmotor aufzunehmen. Dabei können die Magnete spezielle, an die Zahnform angepasste Formen annehmen.In this case, the magnets for the hollow shaft motor are arranged between the tooth gaps or in the teeth of the outer ring. This also reduces the size, since the space within the teeth is used to receive the magnets for the hollow shaft motor. The magnets can take special, adapted to the tooth shape shapes.
  • Der Außenring weist zur Aufnahme der Magnete Ausnehmungen auf, die von Durchbrüchen oder Einsenkungen gebildet werden. Von den Durchbrüche können relativ große Magnete aufgenommen werden, wohingegen in die Einsenkungen von beiden Seiten Magnete eingelegt werden können.The outer ring has for receiving the magnets recesses, which are formed by openings or depressions. From the apertures relatively large magnets can be added, whereas in the depressions from both sides magnets can be inserted.
  • Um den vorhandenen Raum zwischen den Zahnlücken optimal ausnutzen zu können, weisen die Ausnehmungen erfindungsgemäß einen im Wesentlichen linsenförmigen Querschnitt auf. Die Querschnittsform der Magnete sind entsprechend angepasst.In order to be able to optimally utilize the existing space between the tooth gaps, the recesses have according to the invention a substantially lens-shaped cross section. The cross-sectional shape of the magnets are adjusted accordingly.
  • Optimale Antriebskräfte werden dadurch erzeugt, dass die Teilung des Stators gleich ist, wie die Teilung des Außenringes, oder einem ganzzahligen vielfachen der Teilung des Außenringes entspricht.Optimal driving forces are generated by equating the pitch of the stator as the pitch of the outer ring or an integral multiple of the pitch of the outer ring.
  • Eine einfache Variante sieht vor, dass der Außenring aus Aluminium oder Kunststoff besteht. Hierdurch wird das Gewicht der Rotorpumpe weiter reduziert und ein derartiger Rotor kann preiswert hergestellt werden.A simple variant provides that the outer ring made of aluminum or plastic. As a result, the weight of the rotor pump is further reduced and such a rotor can be manufactured inexpensively.
  • Weitere Merkmale, Vorteile und Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen sowie der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung ein besonders bevorzugtes Ausführungsbeispiel im Einzelnen beschrieben ist. Dabei können die in der Zeichnung dargestellten sowie in der Beschreibung und in den Ansprüchen erwähnten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungswesentlich sein.Further features, advantages and details of the invention will become apparent from the dependent claims and the following description in which, with reference to the drawing, a particularly preferred embodiment is described in detail. The features shown in the drawing and mentioned in the description and in the claims may each be essential to the invention individually or in any combination.
  • In der Zeichnung zeigen:
  • Figur 1
    eine perspektivische Darstellung der erfindungsgemäßen Rotorpumpe;
    Figur 2
    eine Draufsicht auf die Rotorpumpe;
    Figur 3
    eine Seitenansicht der Rotorpumpe in Richtung des Pfeils III gemäß Figur 2;
    Figur 4
    einen Schnitt IV-IV gemäß Figur 2; und
    Figur 5
    einen Schnitt V-V gemäß Figur 3.
    In the drawing show:
    FIG. 1
    a perspective view of the rotor pump according to the invention;
    FIG. 2
    a plan view of the rotor pump;
    FIG. 3
    a side view of the rotor pump in the direction of arrow III according to FIG. 2 ;
    FIG. 4
    a section IV-IV according to FIG. 2 ; and
    FIG. 5
    a section VV according to FIG. 3 ,
  • In der Figur 1 ist mit dem Bezugszeichen 10 eine Rotorpumpe dargestellt, mit welcher zum Beispiel Flüssigkeit, insbesondere Öl für einen Motor, wie Verbrennungsmotor, oder Harnstoff für ein Abgasreinigungssystem, gefördert wird. Hierfür weist die Rotorpumpe 10 einen Einlass 12 und einen Auslass 14 auf. Der Einlass 12 und der Auslass 14 sind in einem Gehäusedeckel 16 vorgesehen, welcher an einem Gehäusetopf 18 angeflanscht ist. Dabei wechseln der Einlass 12 und der Auslass 14 bei einem Wechsel der Drehrichtung. Deutlich erkennbar ist, dass die Rotorpumpe 10 in sich abgeschlossen und lediglich über den Einlass 12 und den Auslass 14 nach außen offen ist. In die Rotorpumpe 10 führt keine Antriebswelle oder dergleichen hinein, so dass sich Abdichtungen hierfür erübrigen. Eine derartige Rotorpumpe 10 erfüllt hohe Dichtigkeitsansprüche.In the FIG. 1 Reference numeral 10 denotes a rotor pump with which, for example, fluid, in particular oil for an engine, such as an internal combustion engine, or urea for an exhaust gas purification system, is conveyed. For this purpose, the rotor pump 10 has an inlet 12 and an outlet 14. The inlet 12 and the outlet 14 are provided in a housing cover 16, which is flanged to a housing pot 18. In this case, the inlet 12 and the outlet 14 change when the direction of rotation. It can clearly be seen that the rotor pump 10 is self-contained and only open to the outside via the inlet 12 and the outlet 14. No drive shaft or the like leads into the rotor pump 10, so that seals are unnecessary for this purpose. Such a rotor pump 10 fulfills high tightness requirements.
  • Die Figur 2 zeigt eine Draufsicht auf den Gehäusedeckel 16 und es sind durch den Einlass 12 und Auslass 14 Verdrängungsräume 20 erkennbar. Die Figur 3 zeigt die Rotorpumpe 10 in Seitenansicht und die Figur 4 im Längsschnitt mit abgenommenem Gehäusetopf 18.The FIG. 2 shows a plan view of the housing cover 16 and it can be seen through the inlet 12 and outlet 14 displacement chambers 20. The FIG. 3 shows the rotor pump 10 in side view and the FIG. 4 in longitudinal section with removed housing pot 18th
  • Wie auch aus dem Querschnitt gemäß der Figur 5 ersichtlich, werden die Verdrängungsräume 20 zwischen einem Außenring 22 und einem Innenring 24 gebildet. Dabei ist der Außenring 22 innenverzahnt und weist beim dargestellten Ausführungsbeispiel insgesamt sechs nach innen ragende Zähne 26 auf, zwischen denen sich Zahnlücken 36 befinden. Der Innenring 24 ist außenverzahnt und weist insgesamt fünf nach außen weisende Zähne 28 auf; die in die Zahnlücken 36 greifen. Die Zähne 26 und 28 kämmen und bilden dabei die Verdrängungsräume 20. Außerdem sind der Außenring 22 und der Innenring 24 koaxial zueinander ausgerichtet, wohingegen ihre Achsen 30 und 32 einen Abstand 34 (Exzentrizität) zueinander aufweisen.As well as from the cross section according to the FIG. 5 can be seen, the displacement chambers 20 between an outer ring 22 and an inner ring 24 are formed. In this case, the outer ring 22 is internally toothed and has in the illustrated embodiment a total of six inwardly projecting teeth 26, between which tooth gaps 36 are located. The inner ring 24 is externally toothed and has a total of five outwardly facing teeth 28; which engage in the tooth gaps 36. The teeth 26 and 28 mesh and thereby form the Displacement spaces 20. In addition, the outer ring 22 and the inner ring 24 are aligned coaxially with each other, whereas their axes 30 and 32 have a distance 34 (eccentricity) to each other.
  • Der Außenring 22 bildet den Rotor 38 eines Hohlwellenmotors 40 und ist in einem Stator 42 drehbar gelagert. Dieser Stator 42 weist in Längsrichtung verlaufende und radial nach außen offene Aufnahmen 44 für (nicht dargestellte) Spulen auf, wohingegen der den Rotor 38 bildende Außenring 22 Ausnehmungen 46 für Magnete 48 (Figur 4) aufweist. Dabei sind die Ausnehmungen 46 des dargestellten Ausführungsbeispiels als Einsenkungen ausgeführt, so dass von jeder Seite ein Magnet 48 eingesetzt werden kann. Der Querschnitt der Ausnehmungen 46 ist im Wesentlichen linsenförmig mit einer ersten, radial äußeren Umfangsfläche 50, die um die Achse 30 gekrümmt ist, und einer zweiten, radial inneren Umfangsfläche 52, die dem Profil des Zahns 26 folgt.The outer ring 22 forms the rotor 38 of a hollow shaft motor 40 and is rotatably mounted in a stator 42. This stator 42 has longitudinally extending and radially outwardly open receptacles 44 for (not shown) coils, whereas the rotor 38 forming outer ring 22 recesses 46 for magnets 48 (FIGS. FIG. 4 ) having. The recesses 46 of the illustrated embodiment are designed as depressions, so that a magnet 48 can be used from each side. The cross-section of the recesses 46 is substantially lenticular with a first radially outer peripheral surface 50 curved about the axis 30 and a second radially inner peripheral surface 52 following the profile of the tooth 26.
  • Aus Figur 5 ist außerdem deutlich erkennbar, dass Eine Drehung des Außenrings 22 eine Drehung des Innenrings 24 um dessen Achse 32 bewirkt, so dass die Zähne 26 und 28 kämmen, wodurch die Größe der Verdrängungsräume 20 verändert wird.Out FIG. 5 It is also clearly seen that rotation of the outer ring 22 causes rotation of the inner ring 24 about its axis 32, so that the teeth 26 and 28 mesh, thereby changing the size of the displacement spaces 20.
  • Eine derartige Rotorpumpe 10 ist nicht nur einfach aufgebaut, sondern besitzt auch ein geringes Gewicht und ist mühelos montierbar und besitzt zudem ein größeres Fördervolumen bei gleicher Drehzahl. Außerdem sind die radialen Abmessungen aufgrund der Integration der Magnete 48 in den Außenring 22 gering. Ferner ist deutlich in Figur 5 erkennbar, dass das Gehäuse der Rotorpumpe 10, d.h. deren Gehäusedeckel 16 und deren Gehäusetopf 18, von keinen Bauteilen durchsetzt wird, und daher keine Undichtigkeiten zu befürchten sind.Such a rotor pump 10 is not only simple, but also has a low weight and is easy to install and also has a larger flow at the same speed. In addition, the radial dimensions due to the integration of the magnets 48 in the outer ring 22 are low. Furthermore, it is clearly in FIG. 5 recognizable that the housing of the rotor pump 10, that is, the housing cover 16 and the housing pot 18, is penetrated by no components, and therefore no leaks are to be feared.

Claims (4)

  1. A rotor pump (10) with an internally geared outer ring (22) and an externally geared inner ring (24) mounted therein and meshing therewith, wherein the outer ring (22) and the inner ring (24) are arranged axially parallel to each other and the axis (30) of the outer ring (22) and the axis (32) of the inner ring (24) have a distance (34) with respect to each other, and wherein the outer ring (22) is driven using a hollow shaft motor (40) with a stator (42) carrying coils and a rotor (38) rotatably mounted therein, and wherein the outer ring (22) forms the rotor (38) of the hollow shaft motor (40) and between the recesses (36) of the outer ring (22) magnets (48) are accommodated, and the outer ring (22) has recesses (46) for containing the magnets (48) which are formed by breakthroughs or depressions, characterized in that the recesses (46) having basically a lenticular cross section.
  2. Rotor pump according to claim 1, characterized in that the partition of the stator (42) is equal to the partition of the outer ring (22) or corresponds to a whole-number multiple of the partition of the outer ring (22).
  3. Rotor pump according to one of the preceding claims, characterized in that the outer ring (22) is made of aluminum or plastic.
  4. Rotor pump according to one of the preceding claims, characterized in that all parts are arranged inside or at the inner surface of the housing (16, 18) of the rotor pump (10) and the housing (16, 18) is not crossed by parts.
EP08773826A 2007-07-25 2008-07-03 Integrated internal gear pump with an electric motor Active EP2122174B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102007035239A DE102007035239A1 (en) 2007-07-25 2007-07-25 rotor pump
PCT/EP2008/005415 WO2009012872A1 (en) 2007-07-25 2008-07-03 Integrated internal gear pump with an electric motor

Publications (2)

Publication Number Publication Date
EP2122174A1 EP2122174A1 (en) 2009-11-25
EP2122174B1 true EP2122174B1 (en) 2012-09-05

Family

ID=39790354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08773826A Active EP2122174B1 (en) 2007-07-25 2008-07-03 Integrated internal gear pump with an electric motor

Country Status (5)

Country Link
US (1) US8113794B2 (en)
EP (1) EP2122174B1 (en)
CN (1) CN101711313A (en)
DE (1) DE102007035239A1 (en)
WO (1) WO2009012872A1 (en)

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Also Published As

Publication number Publication date
US20100111722A1 (en) 2010-05-06
EP2122174A1 (en) 2009-11-25
CN101711313A (en) 2010-05-19
US8113794B2 (en) 2012-02-14
DE102007035239A1 (en) 2009-01-29
WO2009012872A1 (en) 2009-01-29

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