EP0297147B1 - Internal gear pump as a lubrication pump - Google Patents
Internal gear pump as a lubrication pump Download PDFInfo
- Publication number
- EP0297147B1 EP0297147B1 EP19870109020 EP87109020A EP0297147B1 EP 0297147 B1 EP0297147 B1 EP 0297147B1 EP 19870109020 EP19870109020 EP 19870109020 EP 87109020 A EP87109020 A EP 87109020A EP 0297147 B1 EP0297147 B1 EP 0297147B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- pump
- inner rotor
- gear pump
- annular gear
- 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
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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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/101—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with a crescent-shaped filler element, located between the inner and outer intermeshing members
Definitions
- the invention relates to an internal gear pump as a lubricating oil pump for an internal combustion engine, with a pump housing with an inner rotor with external teeth, which meshes with an eccentrically arranged external rotor with internal teeth, with an inlet and with an outlet, the drive shaft of the internal combustion engine for torque transmission directly or via a connecting member is connected to the inner rotor and the outer rotor is fixed in the pump housing, and guide members are provided for radial guidance of the inner rotor between the inner rotor and the pump housing and / or the pump cover.
- the axial guidance of the outer rotor and the inner rotor is generally achieved in gear pumps of the type mentioned at the beginning by end faces in the pump housing and the pump cover.
- the inner rotor is provided with a collar on one or both sides in the hub area.
- the one or two side collars are located in recesses in the pump housing and / or the pump cover, as a result of which the inner rotor is also guided securely in the radial direction.
- an inner sleeve is generally provided for this purpose, on which the inner rotor with its two side collars is arranged with play, but in a rotationally fixed manner.
- the inner bush in turn sits firmly on the crankshaft. In this way, the game of the crankshaft is absorbed by the game between the inner sleeve and the inner peripheral wall of the inner rotor.
- GB-A-2047809 discloses an internal gear pump of this type.
- the present invention is therefore based on the object of providing an internal gear pump of the type mentioned at the outset, the manufacture of which is simple and cheap, and at the same time simple assembly should also be provided.
- this object is achieved in that the guide members are formed only by at least one recess in at least one end face of the inner rotor and by an extension in the pump housing or the pump cover, the extension projecting into the recess.
- the inner rotor makes the inner rotor much easier and cheaper to manufacture than the previously known inner rotors.
- the inner rotor can be pressed in one operation if it is made of sintered metal consists. So far, the inner rotor with its two side collars had to be turned first and then turned. No special further processing is now necessary. Only the two smooth side surfaces are ground on the outside if necessary. In addition, it is advantageous that this results in a material saving for the inner rotor.
- the internal gear pump according to the invention has a lower power consumption, since less friction (bearing friction) occurs.
- the recess or the recesses can have any shape, with the lugs in the pump housing or the pump cover correspondingly being fitted to the recesses.
- one or more indentations in an end face of the inner rotor can be arranged distributed over the circumference below the ring gear.
- the recess can have one or more shoulders on which the shoulder (s) rest.
- the recess can be designed as an annular groove, the attachment in the pump housing or the pump cover forming an annular attachment which can be fitted into the annular groove or which bears against the outer annular groove wall.
- the recess has an annular shape, forming an abutment shoulder for the attachment on its outer peripheral wall.
- An embodiment of the approach according to the invention can consist in that it is designed as a projection which protrudes from the pump housing into the recess, recess or annular groove of the inner rotor.
- the approach to the pump housing is in one piece, which means that no separate part is necessary; rather, the approach to the manufacture of the pump housing, e.g. by pouring or spraying.
- the approach can also be designed as a separate socket, which is fastened in the pump housing or in the pump cover.
- the projection can also be in one piece with the pump cover. In this case, it is only necessary that the pump cover is connected to the pump housing in a precisely centered manner.
- a separate socket can be connected to the pump housing or the pump cover in a number of ways.
- the inner rotor is provided with torque transmission elements and can be connected either directly or indirectly to the crankshaft.
- the inner rotor with radial play is arranged in a rotationally fixed manner on an inner bush which is fastened to the drive shaft.
- the internal gear pump is basically of a known design, which is why only the parts essential to the invention are described in more detail below.
- the internal gear pump has a pump housing 1 which is connected in any way to the motor, e.g. is flanged to the motor housing of an internal combustion engine. On the outside, the pump housing is closed off by a cover 2. Between the cover 2 and the pump housing 1 there is an outer rotor 3 which is fixedly arranged in the pump housing 1 and an inner rotor 4. The inner rotor has an external toothing and the outer rotor 3 has an internal toothing.
- a crescent-shaped sealing part 7 can serve in a known manner for sealing between a suction kidney 5 and a pressure kidney 6. The function and mode of operation of the sealing part 7 are generally known.
- the lubricant or oil is introduced via the suction kidney 5 as an inlet into the pump housing and led out via the pressure kidney 6 as an outlet.
- the sealing part 7 is not absolutely necessary within the scope of the invention. Rather, a configuration of the internal gear pump is also possible, in which the sealing is carried out by the teeth themselves.
- the inner rotor 4 has two mutually opposite, inwardly projecting webs 8 which protrude into grooves 9 of an inner bush 10.
- the inner bush 10 is fixedly attached to the crankshaft of the internal combustion engine (not shown). How out 2 can be seen, there is a game between the inner sleeve 10 and the inner peripheral wall of the inner rotor 4, whereby the radial play of the crankshaft, not shown, is absorbed.
- the outer rotor 3 and inner rotor 4 are guided axially through end faces in the pump housing and the cover 2. Radial guidance is provided by a shoulder 12 in the pump housing 1, which is introduced into the inner rotor 4 from an end face of the inner rotor in a recess in the form of an annular recess 13.
- the recess 13 has an outer shoulder 14 on which the attachment 12 bears with its outer side.
- the inner rotor 4 is practically centered on the also annular approach.
- the indentation 13 is open on the inside. As can be seen from FIG. 1, this results in a stepped screw-in or blind bore which is approximately half the width of the inner rotor 4.
- FIG. 1 the ring-shaped extension 12 is shown as a separate bush which is pressed into the pump housing 1 or is connected to the pump housing 1 in a rotationally fixed manner in any other way.
- FIG. 3 shows an embodiment of the extension 12, in which it is integral with the pump housing 1 and projects into the recess 13 as a projection or nose 12A. The remaining parts in FIG. 3 correspond to those shown in FIG. 1 Share. Only the inner bushing 10 is missing, because in this exemplary embodiment the inner rotor 4 is fastened directly on the crankshaft, not shown, for example by means of a spline or the like.
- the extension 12 protrudes from the pump housing 1 into the recess 13 of the inner rotor 4.
- the extension it is also possible for the extension to protrude from the pump cover 2 into a recess 13 of the inner rotor 4, in which case this extends into the Front face of the inner rotor 4 is introduced.
- indentations in segment form can naturally also be present within the scope of the invention, into which corresponding attachment portions protrude from the pump housing 1.
- annular groove can also be provided instead of a recess 12 in the form of a step, with no inner wall being present.
Description
Die Erfindung betrifft einen Innenzahnradpumpe als Schmieröl pumpe für einen Verbrennungsmotor, mit einem Pumpengehäuse mit einem Innenrotor mit Außenverzahnung, der mit einem exzentrisch dazu angeordneten AuBenrotor mit Innenverzahnung kämmt, mit einem Zulauf und mit einem Ablauf, wobei die Antriebswelle des Verbrennungsmotors zur Drehmomentübertragung direkt oder über ein Verbindungsglied mit dem Innenrotor verbunden und der Außenrotor im Pumpengehäuse fixiert ist, und wobei zur radialen Führung des Innenrotores zwischen dem Innenrotor und dem Pumpengehäuse und/oder dem Pumpendeckel Führungsglieder vorhanden sind.The invention relates to an internal gear pump as a lubricating oil pump for an internal combustion engine, with a pump housing with an inner rotor with external teeth, which meshes with an eccentrically arranged external rotor with internal teeth, with an inlet and with an outlet, the drive shaft of the internal combustion engine for torque transmission directly or via a connecting member is connected to the inner rotor and the outer rotor is fixed in the pump housing, and guide members are provided for radial guidance of the inner rotor between the inner rotor and the pump housing and / or the pump cover.
Die axiale Führung des Außenrotors und des Innenrotores wird bei Zahnradpumpen der eingangs erwähnten Art im allgemeinen durch stirnseitige Anlaufflächen in dem Pumpengehäuse und dem Pumpendeckel erreicht. Zur radialen Führung ist der Innenrotor im Nabenbereich mit einem Bund auf einer oder auf beiden Seiten versehen. Der oder die beiden seitlichen Bunde liegen in Ausnehmungen in dem Pumpengehäuse und/oder dem Pumpendeckel, wodurch der Innenrotor auch in radialer Richtung sicher geführt ist.The axial guidance of the outer rotor and the inner rotor is generally achieved in gear pumps of the type mentioned at the beginning by end faces in the pump housing and the pump cover. For radial guidance, the inner rotor is provided with a collar on one or both sides in the hub area. The one or two side collars are located in recesses in the pump housing and / or the pump cover, as a result of which the inner rotor is also guided securely in the radial direction.
Bei einer Montage der Innenzahnradpumpe auf einer Antriebswelle, die radiales Spiel aufweist, wie z.B. die Kurbelwelle eines Verbrennungsmotores, muß zusätzlich dafür gesorgt werden, daß dieses Spiel von dem Innenrotor ferngehalten wird, wenn man nicht einen größeren Verschleiß und eine kürzere Lebensdauer in Kauf nehmen möchte.When mounting the internal gear pump on a drive shaft that has radial play, e.g. the crankshaft of an internal combustion engine, must also be ensured that this game is kept away from the inner rotor, if you do not want to accept greater wear and a shorter life.
Zu diesem Zweck ist im allgemeinen hierfür eine Innenbuchse vorgesehen, auf der der Innenrotor mit seinen beiden seitlichen Bunden mit Spiel, jedoch drehfest angeordnet ist. Die Innenbuchse wiederum sitzt fest auf der Kurbelwelle. Auf diese Weise wird das Spiel der Kurbelwelle durch das Spiel zwischen der Innenbuchse und der Innenumfangswand des Innenrotors aufgenommen.For this purpose, an inner sleeve is generally provided for this purpose, on which the inner rotor with its two side collars is arranged with play, but in a rotationally fixed manner. The inner bush in turn sits firmly on the crankshaft. In this way, the game of the crankshaft is absorbed by the game between the inner sleeve and the inner peripheral wall of the inner rotor.
Durch GB-A- 2047809 ist eine Innenzahnradpumpe dieser Art bekannt.GB-A-2047809 discloses an internal gear pump of this type.
Nachteilig bei einer derartigen Innenzahnradpumpe ist jedoch, daß die Herstellung des Innenrotors relativ aufwendig und damit teuer ist. Wegen der beiden Bunde mußte der Innenrotor darüberhinaus noch bearbeitet werden.A disadvantage of such an internal gear pump is, however, that the manufacture of the inner rotor is relatively complex and therefore expensive. Because of the two bundles, the inner rotor also had to be machined.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde eine Innenzahnradpumpe der eingangs erwähnten Art zu schaffen, deren Herstellung einfach und billig ist, wobei gleichzeitig auch eine einfache Montage gegeben sein soll.The present invention is therefore based on the object of providing an internal gear pump of the type mentioned at the outset, the manufacture of which is simple and cheap, and at the same time simple assembly should also be provided.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die Führungsglieder nur durch wenigstens eine Aussparung in wenigstens einer Stirnseite des Innenrotors und durch einen Ansatz in dem Pumpengehäuse oder dem Pumpendeckel gebildet sind, wobei der Ansatz in die Aussparung ragt.According to the invention, this object is achieved in that the guide members are formed only by at least one recess in at least one end face of the inner rotor and by an extension in the pump housing or the pump cover, the extension projecting into the recess.
Erfindungsgemäß sind nunmehr zur radialen Führung des Innenrotors keine seitlichen Bunde an dem Innenrotor und damit zusammenarbeitende Ausnehmungen in dem Pumpengehäuse oder dem Pumpendeckel notwendig, sondern es ragt nunmehr ein Ansatz in die Aussparung in dem Innenrotor hinein, wodurch der Innenrotor in seiner Lage zur Mittenachse zentriert ist.According to the invention, no lateral collars on the inner rotor and thus cooperating recesses in the pump housing or the pump cover are now necessary for the radial guidance of the inner rotor, but an extension now projects into the recess in the inner rotor, as a result of which the inner rotor is centered in its position in relation to the central axis .
Durch diese Ausgestaltung läBt sich der Innenrotor wesentlich einfacher und billiger herstellen, als die bisher bekannten Innenrotoren. So kann der Innenrotor z.B. in einem Arbeitsgang fertig gepreßt werden, wenn er aus Sintermetall besteht. Bisher mußte der Innenrotor mit seinen beiden seitlichen Bunden erst vorgedreht und danach fertiggedreht werden. Nunmehr ist keine besondere weitere Bearbeitung notwendig. Lediglich die beiden glatten Seitenflächen werden bei Bedarf außen geschliffen. Darüberhinaus ist von Vorteil, daß sich dadurch eine Werkstoffersparnis für den Innenrotor ergibt. Weiterhin hat die erfindungsgemäße Innenzahnradpumpe eine geringere Leistungsaufnahme, da eine geringere Reibung (Lagerreibung) auftritt.This configuration makes the inner rotor much easier and cheaper to manufacture than the previously known inner rotors. For example, the inner rotor can be pressed in one operation if it is made of sintered metal consists. So far, the inner rotor with its two side collars had to be turned first and then turned. No special further processing is now necessary. Only the two smooth side surfaces are ground on the outside if necessary. In addition, it is advantageous that this results in a material saving for the inner rotor. Furthermore, the internal gear pump according to the invention has a lower power consumption, since less friction (bearing friction) occurs.
Die Aussparung bzw. die Aussparungen können beliebige Form haben, wobei entsprechend die Ansätze in dem Pumpengehäuse oder dem Pumpendeckel entsprechend an die Aussparungen ange paßt sind. So können z.B. ein oder mehrere Eindrehungen in einer Stirnseite des Innenrotores unterhalb des Zahnkranzes über den Umfang verteilt angeordnet sein.The recess or the recesses can have any shape, with the lugs in the pump housing or the pump cover correspondingly being fitted to the recesses. For example, one or more indentations in an end face of the inner rotor can be arranged distributed over the circumference below the ring gear.
Die Eindrehung kann dabei ein oder mehrere Schultern aufweisen, an der der oder die Ansätze anliegen.The recess can have one or more shoulders on which the shoulder (s) rest.
In einer vorteilhaften Ausgestaltung der Erfindung kann die Eindrehung als Ringnut ausgebildet sein, wobei der Ansatz in dem Pumpengehäuse oder dem Pumpendeckel einen ringförmigen Ansatz bildet, der in die Ringnut einpaßbar ist bzw. der an der außenseitigen Ringnutwand anliegt.In an advantageous embodiment of the invention, the recess can be designed as an annular groove, the attachment in the pump housing or the pump cover forming an annular attachment which can be fitted into the annular groove or which bears against the outer annular groove wall.
Ebenso kann in einer anderen Ausgestaltung der Erfindung vorgesehen sein, daß die Eindrehung eine Ringform aufweist, wobei sie an ihrer äußeren Umfangswand eine Anlageschulter für den Ansatz bildet.It can also be provided in another embodiment of the invention that the recess has an annular shape, forming an abutment shoulder for the attachment on its outer peripheral wall.
Eine erfindungsgemäße Ausgestaltung des Ansatzes kann darin bestehen, daß er als ein Vorsprung ausgebildet ist, der von dem Pumpengehäuse aus in die Aussparung, Eindrehung oder Ringnut des Innenrotores ragt.An embodiment of the approach according to the invention can consist in that it is designed as a projection which protrudes from the pump housing into the recess, recess or annular groove of the inner rotor.
Auf diese Weise ist der Ansatz mit dem Pumpengehäuse einstückig, was bedeutet, daß kein gesondertes Teil notwendig ist; vielmehr kann bereits der Ansatz bei der Herstellung des Pumpengehäuses, z.B. durch Gießen oder Spritzen, berücksichtigt werden.In this way, the approach to the pump housing is in one piece, which means that no separate part is necessary; rather, the approach to the manufacture of the pump housing, e.g. by pouring or spraying.
Selbstverständlich kann jedoch im Bedarfsfalle auch der Ansatz als eine gesonderte Buchse ausgebildet sein, die im Pumpengehäuse oder im Pumpendeckel befestigt ist. Ebenso kann auch der Ansatz als Vorsprung einstückig mit dem Pumpendekkel sein. In diesem Falle ist es lediglich erforderlich, daß der Pumpendeckel entsprechend genau zentriert mit dem Pumpengehäuse verbunden wird.Of course, if necessary, the approach can also be designed as a separate socket, which is fastened in the pump housing or in the pump cover. Likewise, the projection can also be in one piece with the pump cover. In this case, it is only necessary that the pump cover is connected to the pump housing in a precisely centered manner.
Die Verbindung einer gesonderten Buchse mit dem Pumpengehäuse oder dem Pumpendeckel kann auf vielfache Weise erfolgen.A separate socket can be connected to the pump housing or the pump cover in a number of ways.
In einfacher Weise wird man die Buchse in das Pumpengehäuse einpressen.In a simple way, you will press the socket into the pump housing.
Der Innenrotor ist mit Drehmomentübertragungsgliedern versehen und kann entweder direkt oder indirekt mit der Kurbelwelle verbunden sein.The inner rotor is provided with torque transmission elements and can be connected either directly or indirectly to the crankshaft.
Zur Aufnahme des Radialspieles der Antriebswelle des Verbrennungsmotores kann vorgesehen sein, daß der Innenrotor mit radialem Spiel drehfest auf einer Innenbuchse angeordnet ist, die auf der Antriebswelle befestigt ist.To accommodate the radial play of the drive shaft of the internal combustion engine, it can be provided that the inner rotor with radial play is arranged in a rotationally fixed manner on an inner bush which is fastened to the drive shaft.
Nachfolgend sind zwei Ausführungsbeispiele der Erfindung anhand der Zeichnung prinzipmäßig beschrieben.Two exemplary embodiments of the invention are described in principle with reference to the drawing.
Es zeigt:
- Fig. 1:
- einen Längsschnitt durch die erfindungsgemäße Innenzahnradpumpe
- Fig. 2:
- einen Schnitt nach der Linie II-II der Fig. 1
- Fig. 3:
- einen Längsschnitt entsprechend Figur 1 in einer anderen Ausführungsform.
- Fig. 1:
- a longitudinal section through the internal gear pump according to the invention
- Fig. 2:
- a section along the line II-II of Fig. 1st
- Fig. 3:
- a longitudinal section corresponding to Figure 1 in another embodiment.
Die Innenzahnradpumpe ist grundsätzlich von bekanntem Aufbau, weshalb nachfolgend nur die für die Erfindung wesentlichen Teile näher beschrieben werden.The internal gear pump is basically of a known design, which is why only the parts essential to the invention are described in more detail below.
Die Innenzahnradpumpe weist ein Pumpengehäuse 1 auf, das auf beliebige Weise mit dem Motor verbunden ist, das z.B. an das Motorgehäuse eines Verbrennungsmotores angeflanscht ist. Außenseitig ist das Pumpengehäuse durch einen Deckel 2 abgeschlossen. Zwischen dem Deckel 2 und dem Pumpengehäuse 1 befindet sich ein Außenrotor 3, der fest in dem Pumpengehäuse 1 angeordnet ist und ein Innenrotor 4. Der Innenrotor weist eine Außenverzahnung und der Außenrotor 3 eine Innenverzahnung auf. Zur Abdichtung zwischen einer Saugniere 5 und einer Druckniere 6 kann in bekannter Weise ein sichelförmiges Dichtteil 7 dienen. Funktion und Wirkungsweise des Dichtteiles 7 sind allgemein bekannt. Das Schmiermittel bzw. Öl wird über die Saugniere 5 als Zulauf in das Pumpengehäuse eingeleitet und über die Druckniere 6 als Ablauf herausgeführt. Selbstverständlich ist im Rahmen der Erfindung jedoch das Dichtteil 7 nicht unbedingt erforderlich. Vielmehr ist auch eine Ausgestaltung der Innenzahnradpumpe möglich, bei der die Abdichtung von den Zähnen selbst übernommen wird.The internal gear pump has a pump housing 1 which is connected in any way to the motor, e.g. is flanged to the motor housing of an internal combustion engine. On the outside, the pump housing is closed off by a cover 2. Between the cover 2 and the pump housing 1 there is an
Der Innenrotor 4 weist zwei sich gegenüberliegende nach innen ragende Stege 8 auf, die in Nuten 9 einer Innenbuchse 10 ragen. Die Innenbuchse 10 ist fest auf der Kurbelwelle des Verbrennungsmotores (nicht dargestellt) befestigt. Wie aus der Fig. 2 ersichtlich ist, ist zwischen der Innenbuchse 10 und der inneren Umfangswand des Innenrotors 4 ein Spiel vorhanden, wodurch das Radialspiel der nicht dargestellten Kurbelwelle aufgefangen wird.The
Axial sind Außenrotor 3 und Innenrotor 4 durch Stirnflächen in dem Pumpengehäuse und dem Deckel 2 geführt. Die radiale Führung übernimmt ein Ansatz 12 in dem Pumpengehäuse 1, der in eine Aussparung in Form einer ringförmigen Eindrehung 13 von einer Stirnseite des Innenrotors aus in den Innenrotor 4 eingebracht ist. Die Eindrehung 13 weist eine Außenschulter 14 auf, an der der Ansatz 12 mit seiner Außenseite anliegt. Der Innenrotor 4 ist praktisch auf dem ebenfalls ringförmigen Ansatz zentriert. Die Eindrehung 13 ist auf der Innenseite offen. Wie aus der Fig.1 ersichtlich ist, entsteht damit eine stufenförmige Eindrehung bzw. eine Sackbohrung, die ungefähr die halbe Breite des Innenrotores 4 ausmacht.The
In der Figur 1 ist der ringförmige Ansatz 12 als eine gesonderte Buchse dargestellt, die in das Pumpengehäuse 1 eingepreßt oder auf sonst beliebige Weise verdrehfest mit dem Pumpengehäuse 1 verbunden ist. In der Figur 3 ist eine Ausgestaltung des Ansatzes 12 dargestellt, bei der dieser einstückig mit dem Pumpengehäuse 1 ist und als Vorsprung bzw. Nase 12A in die Eindrehung 13 hineinragt. Die übrigen Teile in der Figur 3 entsprechen den in der Figur 1 dargestellten Teilen. Lediglich die Innenbuchse 10 fehlt, denn in diesem Ausführungsbeispiel ist der Innenrotor 4 direkt auf der nicht dargestellten Kurbelwelle befestigt, z.B. über eine Keilverzahnung oder dgl..In FIG. 1, the ring-shaped
Bei dem Ausführungsbeispiel ragt der Ansatz 12 von dem Pumpengehäuse 1 aus in die Eindrehung 13 des Innenrotors 4. Selbstverständlich ist es auch möglich, daß der Ansatz von dem Pumpendeckel 2 aus in eine Eindrehung 13 des Innenrotors 4 ragt, wobei diese in diesem Falle in die deckelseitige Stirnseite des Innenrotors 4 eingebracht ist.In the embodiment, the
Statt einer Eindrehung, die sich ringförmig über den gesamten Umfang des Innenrotors 4 erstreckt, können selbstverständlich im Rahmen der Erfindung auch nur Eindrehungen in Segmentform vorhanden sein, in die entsprechende Ansatzteilstücke von dem Pumpengehäuse 1 ragen. Ebenso kann statt einer Eindrehung 12 in Stufenform, wobei keine Innenwand vorhanden ist, auch eine Ringnut vorgesehen sein.Instead of an indentation which extends in a ring over the entire circumference of the
Claims (8)
- An annular gear pump as a lubricating oil pump for an internal combustion engine, with a pump casing (1) with an internal rotor (4) having external toothing, which meshes with an external rotor (3) disposed eccentrically thereto and having internal toothing, with an inlet and an outlet, with the drive shaft of the internal combustion engine being connected directly or via a connecting member to the internal rotor (4) for the purpose of torque transmission and the external rotor (3) being guided in the pipe casing (1), and with guide members being provided for the radial guidance of the internal rotor (4) between said internal rotor and the pump casing (1) and/or the pump cover,
characterised in that the guide members are only formed by one or several recesses (13) in the front side of the inner rotor (4) underneath the gearing and by a flange (12) in the pump casing (1) or the pump cover (2), with the recess (13) comprising at least one external circumferential wall having a contact shoulder (14), against which the flange (12) abuts, by which the inner rotor (4) is centred in its position with respect to the central axis and is guided with radial play with respect to the drive shaft. - An annular gear pump according to Claim 1,
characterised in that the recess (13) is constructed as an annular groove, into which the annular flange (12) projects. - An annular gear pump according to Claim 1 or 2,
characterised in that the clearance, the annular groove or recess (13) extends over hall the width of the inner rotor (4 ). - An annular gear pump according to one of Claims 1 to 3,
characterised in that the flange (12) is formed by a protrusion (12A) in the pump casing (1), which projects from the pump casing into the clearance, recess or annular groove in the inner rotor (4). - An annular gear pump according to one of Claims 1 to 3,
characterised in that the flange is formed by a sleeve (12), which is disposed in the pump casing (1). - An annular gear pump according to Claim 5,
characterised in that the sleeve (12) is pressed into the pump casing (1). - An annular gear pump according to one of Claims 1 to 6,
characterised in that the inner rotor (4) comprises torque transmission members for its torsionally rigid connection to the drive shaft on the inner circumference. - An annular gear pump according to one of Claims 1 to 7,
characterised in that the internal rotor (4) is disposed in a torsionally rigid manner with radial play on an inner sleeve (10), which is attached to the drive shaft.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19870109020 EP0297147B1 (en) | 1987-06-23 | 1987-06-23 | Internal gear pump as a lubrication pump |
| DE8787109020T DE3772386D1 (en) | 1987-06-23 | 1987-06-23 | INTERNAL GEAR PUMP AS A LUBRICATING OIL PUMP. |
| ES87109020T ES2025589T3 (en) | 1987-06-23 | 1987-06-23 | INTERNAL TOOTHED WHEEL PUMP AS LUBRICATING OIL PUMP. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19870109020 EP0297147B1 (en) | 1987-06-23 | 1987-06-23 | Internal gear pump as a lubrication pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0297147A1 EP0297147A1 (en) | 1989-01-04 |
| EP0297147B1 true EP0297147B1 (en) | 1991-08-21 |
Family
ID=8197086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19870109020 Expired - Lifetime EP0297147B1 (en) | 1987-06-23 | 1987-06-23 | Internal gear pump as a lubrication pump |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0297147B1 (en) |
| DE (1) | DE3772386D1 (en) |
| ES (1) | ES2025589T3 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3923019A1 (en) * | 1989-07-12 | 1991-01-17 | Bayerische Motoren Werke Ag | PUMP ARRANGEMENT ON A MACHINE, IN PARTICULAR LUBRICANT OIL PUMP ON A INTERNAL COMBUSTION ENGINE |
| JPH05202861A (en) * | 1991-10-30 | 1993-08-10 | Nippondenso Co Ltd | Gear pump |
| DE59808764D1 (en) | 1998-09-15 | 2003-07-24 | Ford Global Tech Inc | Internal gear or inner contour rotor pressure medium pump |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR508586A (en) * | 1919-07-26 | 1920-10-15 | Henri Negre | Rotary pump |
| DE1163679B (en) * | 1959-05-14 | 1964-02-20 | Teves Kg Alfred | Hydrostatic rotary piston engine |
| SE322988B (en) * | 1965-05-12 | 1970-04-20 | Sundstrand Corp | |
| DE2916666A1 (en) * | 1979-04-25 | 1980-10-30 | Ford Werke Ag | LUBRICATING OIL PUMP FOR INTERNAL COMBUSTION ENGINES |
| US4496297A (en) * | 1981-06-02 | 1985-01-29 | Mitsubishi Denki Kabushiki Kaisha | Rotary vane pump with overlapping rotor and housing portions |
| DE3410015C2 (en) * | 1984-03-19 | 1995-09-28 | Schwaebische Huettenwerke Gmbh | Internal rotor gear oil pump for automotive engines and automatic automotive transmissions |
| AT389739B (en) * | 1984-09-21 | 1990-01-25 | Avl Verbrennungskraft Messtech | FOUR-STROKE COMBUSTION ENGINE WITH A LUBRICATED OIL PUMP DESIGNED AS A GEAR PUMP |
| IT1184924B (en) * | 1985-03-22 | 1987-10-28 | Weber Spa | ELECTRICALLY OPERATED FUEL PUMP |
| DE3628163A1 (en) * | 1986-08-20 | 1987-12-10 | Daimler Benz Ag | Bearing for a drive gearwheel of an internal-toothed gear pump |
-
1987
- 1987-06-23 DE DE8787109020T patent/DE3772386D1/en not_active Expired - Fee Related
- 1987-06-23 ES ES87109020T patent/ES2025589T3/en not_active Expired - Lifetime
- 1987-06-23 EP EP19870109020 patent/EP0297147B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0297147A1 (en) | 1989-01-04 |
| ES2025589T3 (en) | 1992-04-01 |
| DE3772386D1 (en) | 1991-09-26 |
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