EP1039135A2 - Internal gear pump with sealings incorporated in the teeth - Google Patents

Internal gear pump with sealings incorporated in the teeth Download PDF

Info

Publication number
EP1039135A2
EP1039135A2 EP99124717A EP99124717A EP1039135A2 EP 1039135 A2 EP1039135 A2 EP 1039135A2 EP 99124717 A EP99124717 A EP 99124717A EP 99124717 A EP99124717 A EP 99124717A EP 1039135 A2 EP1039135 A2 EP 1039135A2
Authority
EP
European Patent Office
Prior art keywords
ring gear
pinion
tooth
gear pump
internal 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.)
Withdrawn
Application number
EP99124717A
Other languages
German (de)
French (fr)
Other versions
EP1039135A3 (en
Inventor
Franz Arbogast
Peter Peiz
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.)
Voith Turbo GmbH and Co KG
Original Assignee
Voith Turbo GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Turbo GmbH and Co KG filed Critical Voith Turbo GmbH and Co KG
Priority to KR1020000008807A priority Critical patent/KR20000062610A/en
Priority to US09/523,802 priority patent/US6273695B1/en
Priority to JP2000082648A priority patent/JP2000291565A/en
Publication of EP1039135A2 publication Critical patent/EP1039135A2/en
Publication of EP1039135A3 publication Critical patent/EP1039135A3/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • 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
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0007—Radial sealings for working fluid
    • F04C15/0019—Radial sealing elements specially adapted for intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
    • 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
    • F04C2/102—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 the two members rotating simultaneously around their respective axes

Definitions

  • the present invention relates to a sickle-free internal gear pump for Generation of high pressure according to the preamble of patent claim 1.
  • a pump of this generic type is known from DE 41 04 397 A1 known.
  • Internal gear pumps generally have an internal gear with which an externally toothed pinion meshes with a smaller number of teeth, i.e. is drivingly engaged.
  • Each tooth head of the ring gear has a profile groove on.
  • a sealing element is inserted into this groove. This arrives during circulation of the pinion with its tooth heads in sliding contact. Doing so shortly a seal is made that seals the suction chamber against the Shuts off the pressure chamber. To achieve a certain contact pressure are the springs on the radially outer ends of the sealing elements.
  • the sealing elements are usually made of plastic. You went there previously believed that some elasticity with regard to the seal necessary is.
  • the invention has for its object to such an internal gear pump design that neither a drop in efficiency occurs nor Pressure pulsations appear.
  • the crowns of the tooth tips of the pinion lie on different radii. This is due to manufacturing tolerances. This means, for example, that the apex of one tooth tip is on a larger radius than the apex of the tooth tip of an adjacent tooth lies.
  • For the Sealing elements means that even their sealing surfaces when the Pinions from tooth to tooth lie on different radii. In a way In this way, the sealing elements result in a dancing movement radial direction. The movement only takes place in the micro range, however, it does exist. It leads to a relative movement of the individual Sealing element on the reveal of the profile groove, which in the tooth head of the Ring gear is incorporated.
  • the individual Sealing element is a barrier between the suction chamber and the pressure chamber.
  • a pressure differential acts on the sealing element with Pressure direction from the suction chamber to the pressure chamber.
  • This also means that the side surface of the sealing element facing the suction chamber against the relevant reveal of the profile groove is pressed.
  • the said Micromotion in the radial direction leads in view of the above Differential pressure for a grinding process.
  • This has a wear of the according to the areas involved.
  • the sealing element becomes extremely undesirable Machined in one face. The wear can be so severe be that it will tilt the sealing elements and thus too Interferences of the meshing leads. Therefore, he could not be the cause for the above-mentioned harmful effects (loss of efficiency, Pressure pulsations) can be determined.
  • Fig. 1 shows in a cross section a sickle-free, head-sealing backlash each with a flank sealing internal gear pump, and in the area of a housing part 1, which - viewed in the axial direction - Connect further housing parts.
  • a fixed on a drive shaft 4 externally toothed pinion 5 meshes with an internally toothed ring gear 6 and thus forms a toothing 12.
  • the pinion 5 and the ring gear 6 are not coaxially but eccentrically; also has the pinion 5 one tooth less than the ring gear 6, so that the outside a toothed head 13 on the pinion 5 with the inside of a toothed head 14 on Ring gear 6 comes into contact.
  • a suction connection 7 in can also be seen the zone in which the teeth on the pinion 5 or ring gear 6 disengaged.
  • a pressure connection 10 is located, also starting from one pressure pocket extending over a circumferential area on the ring gear 6 11, on the opposite side of the pump.
  • the inflow from Pressure medium to the interior of the pump, i.e. to the tooth gaps in the pinion 5 and in the ring gear 6, which cause the promotion of the pressure medium takes place axially and via radial openings 17 in the ring gear 6. These openings 17 start from the outer surface 20 of the ring gear 6 and open into it Tooth base.
  • FIG. 2 shows how the Sealing elements 30 in dovetail-like profile grooves 34 in a form-fitting manner are fitted and how the side / contact surfaces between Sealing element 30 and profile groove 34 can be designed to cover the width the toothing 12 a pressure distribution as uniform as possible and thus to ensure the most stable possible operating behavior of the pump.
  • Fig. 2 shows the pinion 5 and the ring gear 6 in the area in which the / in Ring gear 6 inserted sealing element 30 sealingly abuts the pinion 5.
  • the sealing elements 30 are made of steel due to pressure pulsations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)

Abstract

The pump has an internal geared hollow wheel (6) with a meshing pinion (5) in a housing (1). Each tooth tip (14) of the wheel has a profiled groove for a sealing element (30) for sliding seal with the tooth tips of the pinion. The sealing elements are of metal, esp. of steel.

Description

Die vorliegende Erfindung betrifft eine sichellose Innenzahnradpumpe zur Erzeugung von Hochdruck nach dem Oberbegriff des Patentanspruchs 1.The present invention relates to a sickle-free internal gear pump for Generation of high pressure according to the preamble of patent claim 1.

Eine Pumpe dieser gattungsgemäßen Bauart ist aus der DE 41 04 397 A1 bekannt.A pump of this generic type is known from DE 41 04 397 A1 known.

Innenzahnrad pumpen weisen im allgemeinen ein innenverzahntes Hohlrad auf, mit dem ein außenverzahntes Ritzel mit geringerer Zähnezahl kämmt, d.h. treibend in Eingriff steht. Jeder Zahnkopf des Hohlrades weist eine Profilnut auf. In diese Nut ist ein Dichtelement eingesetzt. Dieses gelangt beim Umlauf des Ritzels mit dessen Zahnköpfen in gleitenden Kontakt. Dabei wird kurzfristig eine Abdichtung hergestellt, die den Saugraum gegen den Druckraum absperrt. Zum Erzielen eines gewissen Anpressdruckes sind die radial äussren Enden der Dichtelemente mit Federn beaufschlagt.Internal gear pumps generally have an internal gear with which an externally toothed pinion meshes with a smaller number of teeth, i.e. is drivingly engaged. Each tooth head of the ring gear has a profile groove on. A sealing element is inserted into this groove. This arrives during circulation of the pinion with its tooth heads in sliding contact. Doing so shortly a seal is made that seals the suction chamber against the Shuts off the pressure chamber. To achieve a certain contact pressure are the springs on the radially outer ends of the sealing elements.

Die Dichtelemente bestehen in der Regel aus Kunststoff. Dabei ging man bisher davon aus, dass eine gewisse Elastizität im Hinblick auf die Abdichtung notwendig ist.The sealing elements are usually made of plastic. You went there previously believed that some elasticity with regard to the seal necessary is.

Im praktischen Betrieb hat sich gezeigt, dass es insbesondere bei höheren Betriebsdrücken zu Erscheinungen kommt, die bisher nicht erklärlich waren. Hierzu gehört vor allem ein Abfall des Wirkungsgrades der Pumpe. Aber auch Druckpulsationen haben sich eingestellt, die höchst unerwünscht sind.In practical operation it has been shown that it is especially at higher Operating pressures appear that were previously not explainable. Above all, this includes a drop in the efficiency of the pump. But also Pressure pulsations have set in, which are highly undesirable.

Der Erfindung liegt die Aufgabe zugrunde, eine Innenzahnradpumpe derart zu gestalten, dass weder ein Abfall des Wirkungsgrades auftritt noch Druckpulsationen in Erscheinung treten. The invention has for its object to such an internal gear pump design that neither a drop in efficiency occurs nor Pressure pulsations appear.

Diese Aufgabe wird durch die Merkmale von Anspruch 1 gelöst.This object is solved by the features of claim 1.

Die Erfinder haben im einzelnen folgendes erkannt:The inventors recognized the following in detail:

Die Scheitel der Zahnköpfe des Ritzels liegen auf unterschiedlichen Radien. Dies ist durch Fertigungstoleranzen bedingt. Dies bedeutet beispielsweise, dass der Scheitelpunkt des einen Zahnkopfes auf einem größeren Radius als der Scheitelpunkt des Zahnkopfes eines benachbarten Zahnes liegt. Für die Dichtelemente bedeutet dies, dass auch ihre Dichtflächen beim Umlauf des Ritzels von Zahn zu Zahn auf unterschiedlichen Radien liegen. In gewisser Weise führen die Dichtelemente hierdurch eine tanzende Bewegung in radialer Richtung aus. Die Bewegung findet zwar nur im Mikro-Bereich statt, jedoch ist sie existent. Sie führt zu einer Relativbewegung des einzelnen Dichtelementes an der Laibung der Profilnut, die in den Zahnkopf des Hohlrades eingearbeitet ist.The crowns of the tooth tips of the pinion lie on different radii. This is due to manufacturing tolerances. This means, for example, that the apex of one tooth tip is on a larger radius than the apex of the tooth tip of an adjacent tooth lies. For the Sealing elements means that even their sealing surfaces when the Pinions from tooth to tooth lie on different radii. In a way In this way, the sealing elements result in a dancing movement radial direction. The movement only takes place in the micro range, however, it does exist. It leads to a relative movement of the individual Sealing element on the reveal of the profile groove, which in the tooth head of the Ring gear is incorporated.

Ein weiterer Umstand kommt hinzu: Wie oben ausgeführt, stellt das einzelne Dichtelement eine Sperre zwischen dem Saugraum und dem Druckraum dar. Dies bedeutet, daß ein Druckdifferential auf das Dichtelement einwirkt, mit Druckrichtung vom Saugraum zum Druckraum. Dies bedeutet weiterhin, daß die dem Saugraum zugewandte Seitenfläche des Dichtelementes gegen die betreffende Laibung der Profilnut angepresst wird. Die genannte Mikrobewegung in radialer Richtung führt im Hinblick auf das genannte Druckdifferential zu einem Schleifvorgang. Dieser hat einen Verschleiß der beteiligten Flächen zufolge. Das Dichtelement wird in höchst unerwünschter Weise an seiner einen Fläche bearbeitet. Der Verschleiß kann derart stark werden, dass er zu einem Verkanten der Dichtelemente und damit zu Störungen des Zahneingriffes führt. Deshalb konnte er auch nicht als Ursache für die obengenannten schädlichen Auswirkungen (Wirkungsgradverlust, Druckpulsationen) ermittelt werden. Another circumstance is added: As stated above, the individual Sealing element is a barrier between the suction chamber and the pressure chamber. This means that a pressure differential acts on the sealing element with Pressure direction from the suction chamber to the pressure chamber. This also means that the side surface of the sealing element facing the suction chamber against the relevant reveal of the profile groove is pressed. The said Micromotion in the radial direction leads in view of the above Differential pressure for a grinding process. This has a wear of the according to the areas involved. The sealing element becomes extremely undesirable Machined in one face. The wear can be so severe be that it will tilt the sealing elements and thus too Interferences of the meshing leads. Therefore, he could not be the cause for the above-mentioned harmful effects (loss of efficiency, Pressure pulsations) can be determined.

Eine weitere erfinderische Erkenntnis besteht darin, dass statt des Kunststoffes Metalle als Material für die Dichtelemente durchaus geeignet sind. Sehr gut bewährt hat sich Stahl, beispielsweise gewöhnlicher Kohlenstoffstahl, aber auch verschleißfeste Edelstähle.Another inventive finding is that instead of Plastic metals are quite suitable as a material for the sealing elements are. Steel has proven itself very well, for example more common Carbon steel, but also wear-resistant stainless steel.

Die Erfindung wird im folgenden anhand der Zeichnung näher erläutert. Diese zeigt in

Fig. 1
einen Querschnitt durch eine sichellose Innenzahnradpumpe im Bereich der beiden Zahnräder;
Fig. 2
eine vergrößerte Ausschnittdarstellung des Bereiches der beiden Zahnräder, in dem die Dichtelemente ihre Dichtwirkung entfalten.
The invention is explained in more detail below with reference to the drawing. This shows in
Fig. 1
a cross section through a sickle-free internal gear pump in the region of the two gears;
Fig. 2
an enlarged detail of the area of the two gears, in which the sealing elements develop their sealing effect.

Die Fig. 1 zeigt in einem Querschnitt eine sichellose, kopfdichtende und spielbehaftete jeweils mit einer Flanke dichtenden Innenzahnradpumpe, und zwar im Bereich eines Gehäuseteils 1, dem sich - in Axialrichtung betrachtet - weitere Gehäuseteile anschließen. Ein auf einer Antriebswelle 4 befestigtes außenverzahntes Ritzel 5 steht im Eingriff mit einem innenverzahnten Hohlrad 6 und bildet so eine Verzahnung 12. Das Ritzel 5 und das Hohlrad 6 sind nicht koaxial, sondern exzentrisch zueinander gelagert; ferner weist das Ritzel 5 einen Zahn weniger auf als das Hohlrad 6, so daß jeweils die Außenseite eines Zahnkopfes 13 am Ritzel 5 mit der Innenseite eines Zahnkopfes 14 am Hohlrad 6 in Berührung kommt. Zu erkennen ist ferner ein Sauganschluß 7 in der Zone, bei der unter Drehung in Pfeilrichtung X die Zähne am Ritzel 5 beziehungsweise Hohlrad 6 außer Eingriff geraten. Dem Sauganschluß 7 im Gehäuseteil 1, in dem das Hohlrad 6 und das Ritzel 5 gelagert sind, schließt sich in axialer Richtung jeweils zu den benachbarten Gehäuseteilen eine Saugtasche 8 an, die sich über einen Teil der Mantelfläche 20 des Hohlrads 6 erstreckt. Ein Druckanschluß 10 befindet sich, ebenfalls ausgehend von einer sich über einen Umfangsbereich am Hohlrad 6 erstreckenden Drucktasche 11, auf der gegenüberliegenden Seite der Pumpe. Die Zuströmung vom Druckmedium zum Innenraum der Pumpe, also zu den Zahnlücken im Ritzel 5 und im Hohlrad 6, welche die Förderung des Druckmediums bewirken, erfolgt axial und über radiale Durchbrüche 17 im Hohlrad 6. Diese Durchbrüche 17 gehen von der Mantelfläche 20 des Hohlrads 6 aus und münden in dessen Zahngrund.Fig. 1 shows in a cross section a sickle-free, head-sealing backlash each with a flank sealing internal gear pump, and in the area of a housing part 1, which - viewed in the axial direction - Connect further housing parts. A fixed on a drive shaft 4 externally toothed pinion 5 meshes with an internally toothed ring gear 6 and thus forms a toothing 12. The pinion 5 and the ring gear 6 are not coaxially but eccentrically; also has the pinion 5 one tooth less than the ring gear 6, so that the outside a toothed head 13 on the pinion 5 with the inside of a toothed head 14 on Ring gear 6 comes into contact. A suction connection 7 in can also be seen the zone in which the teeth on the pinion 5 or ring gear 6 disengaged. The suction port 7 in Housing part 1, in which the ring gear 6 and the pinion 5 are mounted, closes each in the axial direction to the adjacent housing parts Suction bag 8, which extends over part of the outer surface 20 of the ring gear 6 extends. A pressure connection 10 is located, also starting from one pressure pocket extending over a circumferential area on the ring gear 6 11, on the opposite side of the pump. The inflow from Pressure medium to the interior of the pump, i.e. to the tooth gaps in the pinion 5 and in the ring gear 6, which cause the promotion of the pressure medium takes place axially and via radial openings 17 in the ring gear 6. These openings 17 start from the outer surface 20 of the ring gear 6 and open into it Tooth base.

Gemäß der Darstellung nach Fig. 1 sind an den Zahnköpfen des Hohlrads 6 jeweils Dichtelemente 30 eingesetzt, die - in Drehrichtung des Ritzels 5 betrachtet - die Verzahnung 12 zwischen Ritzel 5 und Hohlrad 6 abdichten.1 are on the tooth tips of the ring gear 6th each sealing elements 30 used, the - viewed in the direction of rotation of the pinion 5 - the toothing 12 between the pinion 5 and ring gear 6 seal.

Gemäß der in Fig. 2 gezeigten Ausschnittdarstellung ist aufgezeigt, wie die Dichtelemente 30 in schwalbenschwanzähnlichen Profilnuten 34 formschlüssig eingepaßt sind und wie die Seiten- / Berührungsflächen zwischen Dichtelement 30 und Profilnut 34 ausgebildet sein können, um über die Breite der Verzahnung 12 eine möglichst gleichmäßige Druckverteilung und damit ein möglichst stabiles Betriebsverhalten der Pumpe zu gewährleisten.2 shows how the Sealing elements 30 in dovetail-like profile grooves 34 in a form-fitting manner are fitted and how the side / contact surfaces between Sealing element 30 and profile groove 34 can be designed to cover the width the toothing 12 a pressure distribution as uniform as possible and thus to ensure the most stable possible operating behavior of the pump.

Fig. 2 zeigt das Ritzel 5 und das Hohlrad 6 in dem Bereich, in dem das/ein im Hohlrad 6 eingesetztes Dichtelement 30 dichtend am Ritzel 5 anliegt. Zur Vermeidung von Wirkungsgradverlusten im höheren Druckbereich sowie von Druckpulsationen bestehen die Dichtelemente 30 erfindungsgemäß aus Stahl.Fig. 2 shows the pinion 5 and the ring gear 6 in the area in which the / in Ring gear 6 inserted sealing element 30 sealingly abuts the pinion 5. For Avoiding efficiency losses in the higher pressure range as well as According to the invention, the sealing elements 30 are made of steel due to pressure pulsations.

Claims (2)

Sichellose Zahnradpumpe; 1.1 mit einem innenverzahnten Hohlrad (6); 1.2 mit einem mit dem Hohlrad (6) kämmenden Ritzel (5); 1.3 Hohlrad (6) und Ritzel (5) sind in einem Gehäuse (1) drehbar gelagert; 1.4 das Gehäuse (1) weist einen Sauganschluss (7) und einen Druckanschluss (10) auf; 1.5 das Hohlrad (6) weist Durchbrüche (17) für das zu pumpende Medium auf; 1.6 jeder Zahnkopf (14) des Hohlrades (6) weist eine Profilnut (34) auf, in der sich ein radial bewegliches Dichtelement (30) zum Erzielen einer gleitenden Abdichtung mit den Zahnköpfen des Ritzels (5) befindet; gekennzeichnet durch die folgenden Merkmale: 1.7 die Dichtelemente (30) bestehen aus einem Metall. Sickle-free gear pump; 1.1 with an internally toothed ring gear (6); 1.2 with a pinion (5) meshing with the ring gear (6); 1.3 ring gear (6) and pinion (5) are rotatably mounted in a housing (1); 1.4 the housing (1) has a suction connection (7) and a pressure connection (10); 1.5 the ring gear (6) has openings (17) for the medium to be pumped; 1.6 each tooth head (14) of the ring gear (6) has a profile groove (34) in which there is a radially movable sealing element (30) for achieving a sliding seal with the tooth heads of the pinion (5); characterized by the following features: 1.7 the sealing elements (30) consist of a metal. Sichellose Innenzahnradpumpe nach Anspruch 1, dadurch gekennzeichnet, daß die Dichtelemente (30) aus Stahl bestehen.Sickle-free internal gear pump according to claim 1, characterized characterized in that the sealing elements (30) consist of steel.
EP99124717A 1999-03-26 1999-12-11 Internal gear pump with sealings incorporated in the teeth Withdrawn EP1039135A3 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020000008807A KR20000062610A (en) 1999-03-26 2000-02-23 sickless internal gear wheel pump with sealing elements inserted into the tooth tips
US09/523,802 US6273695B1 (en) 1999-03-26 2000-03-13 Sickleless internal gear wheel pump with sealing elements inserted into the tooth tips
JP2000082648A JP2000291565A (en) 1999-03-26 2000-03-23 Internal gear pump equipped with sealing member inserted in addendum part, having no sickle-shaped member

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19913752 1999-03-26
DE19913752 1999-03-26

Publications (2)

Publication Number Publication Date
EP1039135A2 true EP1039135A2 (en) 2000-09-27
EP1039135A3 EP1039135A3 (en) 2001-12-19

Family

ID=7902506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99124717A Withdrawn EP1039135A3 (en) 1999-03-26 1999-12-11 Internal gear pump with sealings incorporated in the teeth

Country Status (2)

Country Link
EP (1) EP1039135A3 (en)
KR (1) KR20000062610A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101984257A (en) * 2010-10-30 2011-03-09 辽宁工程技术大学 Balanced type crescent seal gear pump
WO2023202752A1 (en) * 2022-04-20 2023-10-26 Hanon Systems Efp Deutschland Gmbh Gerotor pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100427077B1 (en) * 2001-10-09 2004-04-17 현대자동차주식회사 Apparatus of oil pump

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2790394A (en) * 1952-09-02 1957-04-30 Gulf Research Development Co Internal-external gear pump with self-sealing tooth tips
FR1373473A (en) * 1963-10-30 1964-09-25 Goetzewerke Radial sealing ring for rotary piston machine
US4180188A (en) * 1975-11-18 1979-12-25 Kokkoman Shoyu Co., Ltd. Sealing structure for rotary valves
US4618317A (en) * 1982-11-30 1986-10-21 Nippon Piston Ring Co., Ltd. Rotary type fluid compressor
DE4104397A1 (en) * 1990-03-09 1991-09-12 Voith Gmbh J M Internal gear pump without sickle element - incorporates method of dimensioning teeth to give compact design
DE4140293A1 (en) * 1991-12-06 1993-06-09 J.M. Voith Gmbh, 7920 Heidenheim, De SAFETY INTERNAL GEAR PUMP WITH SEALING ELEMENTS INSERTED IN THE GEAR HEADS

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2790394A (en) * 1952-09-02 1957-04-30 Gulf Research Development Co Internal-external gear pump with self-sealing tooth tips
FR1373473A (en) * 1963-10-30 1964-09-25 Goetzewerke Radial sealing ring for rotary piston machine
US4180188A (en) * 1975-11-18 1979-12-25 Kokkoman Shoyu Co., Ltd. Sealing structure for rotary valves
US4618317A (en) * 1982-11-30 1986-10-21 Nippon Piston Ring Co., Ltd. Rotary type fluid compressor
DE4104397A1 (en) * 1990-03-09 1991-09-12 Voith Gmbh J M Internal gear pump without sickle element - incorporates method of dimensioning teeth to give compact design
DE4140293A1 (en) * 1991-12-06 1993-06-09 J.M. Voith Gmbh, 7920 Heidenheim, De SAFETY INTERNAL GEAR PUMP WITH SEALING ELEMENTS INSERTED IN THE GEAR HEADS

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101984257A (en) * 2010-10-30 2011-03-09 辽宁工程技术大学 Balanced type crescent seal gear pump
CN101984257B (en) * 2010-10-30 2012-03-28 辽宁工程技术大学 Balanced type crescent seal gear pump
WO2023202752A1 (en) * 2022-04-20 2023-10-26 Hanon Systems Efp Deutschland Gmbh Gerotor pump

Also Published As

Publication number Publication date
KR20000062610A (en) 2000-10-25
EP1039135A3 (en) 2001-12-19

Similar Documents

Publication Publication Date Title
DE2242269C3 (en) Gear pump or motor
DE19613833A1 (en) Gear pump with meshing internal and external toothed wheels
DE2825616C2 (en) Bearing and sealing arrangement on the shafts of a gear pump
DE2318753A1 (en) GEAR MACHINE
EP2646689A2 (en) Internal gear pump
DE102005041579B4 (en) Internal gear pump with filling piece
DE102005004657A1 (en) Inner gear wheel machine e.g. inner gear wheel pump, has sealing disk pressed on pressure field, gap between housing part and disk, and support ring arranged with bar that supports seal in form-fit manner and inwardly intervenes with seal
EP0563661A1 (en) Internal gear pump with radially movable sealing elements for radial compensation
EP0545424B1 (en) Internal gear pump with sealings incorporated in the teeth
DE2053457C3 (en) Two-stage fluid pump
DE102005047175A1 (en) Vane pump for feeding e.g. diesel fuel, has ring shaped groove designed at front sides of rotor opposite to front wall of pump housing, where ring shaped groove is connected to pressure area and extends over part of rotor circumference
DE102016207093B4 (en) Gear fluid machine
EP1328730B1 (en) Internal geared wheel pump without a filler piece
EP0661454B1 (en) Internal gear pump
EP1039135A2 (en) Internal gear pump with sealings incorporated in the teeth
EP1261806A1 (en) Inverse toothed rotor set
DE102012217115A1 (en) Gear machine with deviating from the circular low pressure port
EP0539673B1 (en) Internal gear pump with two ring gears and one common pinion
EP0607497B1 (en) Internal gear pump with sealings incorporated in the teeth
DE2547994A1 (en) GEAR PUMP OR MOTOR
DE102013202917A1 (en) Geared machine, particularly gear pump or gear motor, has pressure chamber, in which pressure fluid having low particle concentration is present, and channel, through which pressure chamber is connected with axial force compensating groove
DE102011078064A1 (en) Internal gear pump
DE19712169C1 (en) Internal-gear pump without crescent components
DE4428384A1 (en) Geared pump with gears fixed to shaft and freely rotating
DE1280056B (en) Rotary piston machine with two internal gears

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20011212

17Q First examination report despatched

Effective date: 20020627

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

18W Application withdrawn

Withdrawal date: 20020902