EP0933530B1 - Sichellose Innenzahnradpumpe - Google Patents
Sichellose Innenzahnradpumpe Download PDFInfo
- Publication number
- EP0933530B1 EP0933530B1 EP98120951A EP98120951A EP0933530B1 EP 0933530 B1 EP0933530 B1 EP 0933530B1 EP 98120951 A EP98120951 A EP 98120951A EP 98120951 A EP98120951 A EP 98120951A EP 0933530 B1 EP0933530 B1 EP 0933530B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing element
- pinion
- groove
- profiled groove
- geared wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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
- 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
Definitions
- the invention relates to a sickle-free internal gear pump with a internally toothed ring gear, a pinion that meshes with the ring gear and a housing that receives the ring gear and pinion.
- Such an internal gear pump is, for example, from EP 0 607 497 B1 known.
- a sealing element used on the opposite Tooth tip of the pinion or the ring gear when operating the Internal gear pump slides.
- the sealing element is provided with a channel, which extends through the sealing element and a conductive Connection between the bottom of the profile groove and the sealing surface of the Manufactures sealing element. This ensures that the sealing element in front Reaching the dead center receives the pressure that is necessary to achieve this Press the sealing element against the opposite tooth head. To Passing through the dead center, however, does not mean all of the pump generated working pressure on the sealing element, but only a partial pressure.
- each sealing element mentioned is in the profile groove in the radial direction limited movement.
- the outer surface of each sealing element forms thus necessarily a gap with the inner surface of the profile groove.
- the invention has for its object a sickle Internal gear pump according to the preamble of claim 1 shape that the contact pressure of the sealing element against the head of opposite tooth remain essentially the same size, especially at high system pressures.
- Claim 2 describes an advantageous development in which in the area of a dovetail-shaped part either in the Outer surface of the sealing element or in the inner surface of the Profile groove is recessed at least one groove.
- the inventors have recognized that the width of the gap between the Outer surface of the sealing element and the inner surface of the profile groove at Operation changes, especially with a radial displacement of the Sealing element. This will change the amount of control oil used by the Pressure side flows through the mentioned gap to the profile groove base. Accordingly, the inventors suggest that the width of the print side existing gap remains unchanged, regardless of the prevailing Operating parameters.
- Sealing element can be provided with appropriately designed grooves.
- the internal gear pump shown in Fig. 1 is a sickle-less, head-sealing and playful. It comprises a ring gear 1, as essential elements Pinion 2 and a housing 3.
- the ring gear 1 is provided with holes 1.1. These provide a conductive connection between the environment of the Ring gear 1 on the one hand and the space between ring gear 1 and pinion 2 on the other hand. Sealing elements 4 are in each case in the teeth of the ring gear used.
- Pinion 2 is wedged on a pinion shaft 2.1, which in the direction of arrow X circulates.
- the housing 3 has a suction port 3.1 and a pressure port 3.2 on.
- the teeth 1.3 of the ring gear and the teeth 2.2 of the pinion have one certain axial width. Ring gear 1 and pinion 2 are eccentric to each other stored. In addition, the number of teeth 2.2 of the pinion 2 is one less than the number of teeth 1.3 of the ring gear 1.
- Each tooth 1.3 of the Ring gear 1 has a profile groove 1.4.
- a Sealing element 4 used in each profile groove 1.4. This is on part of its cross section dovetail-shaped.
- Each sealing element 4 has one through channel 4.1 on. This provides a conductive connection between the interior or profile base 1.5 and the sealing surface 4.2 of the Sealing element 4 ago.
- the sealing element 4 can radial movement while the internal gear pump is running perform.
- the other arrows shown on the middle sealing element represent the course of the control oil flow.
- the Control oil flow initially coming from the pressure side into a gap 5 the between the outer surface of the sealing element 4 and the inner surface of the Profile groove 1.4 is formed.
- a groove 6 machined into the sealing element In the dovetail part of the Sealing element is a groove 6 machined into the sealing element.
- a continuous groove 7 is provided in the middle Part of the sealing element 4.
- the groove 6 is designed and arranged so that the control oil flow from through groove 7 to the groove base 1.5 is not throttled.
- the wide of the entire channel is also at a radial displacement of the Sealing element 4 always one and the same.
- the first section of this Flow channel, namely the gap 5, is parallel to the contact surface 8 and thus its gap height is independent of radial movements Y.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Description
- Fig. 1
- zeigt eine sichellose Innenzahnradpumpe in einem Axialschnitt.
- Fig. 2
- zeigt die Innenzahnradpumpe gemäß Fig. 1 in einer ersten Ausführungsform.
Claims (2)
- Sichellose Innenzahnradpumpe;1.1 mit einem innenverzahnten Hohlrad (1);1.2 mit einem Ritzel (2), das mit dem Hohlrad (1) kämmt;1.3 Ritzel (2) und Hohlrad (1) sind in einem Gehäuse drehbar gelagert, das einen Sauganschluß (3.1) und einen Druckanschluß (3.2) aufweist;1.4 das Hohlrad (1) weist radiale Durchbrüche (1.1) auf, die jeweils eine leitende Verbindung zwischen dem Zahngrund und der Mantelfläche des Hohlrades (1) herstellen;1.5 in den Zahnköpfen des Hohlrades (1) bzw. des Ritzels (2) ist eine Profilnut (1.4) vorgesehen, in die jeweils ein Dichtelement (4) eingesetzt ist, das am gegenüberliegenden Zahnkopf des Ritzels (2) bzw. des Hohlrades (1) gleiten kann;1.6 die Profilnut (1.4) ist - in einem achssenkrechten Schnitt gesehen - frei von Anschlüssen;1.7 das Dichtelement (4) ist mit einem Kanal (4.1) versehen, der eine leitende Verbindung für einen Steuerölstrom zwischen dem Profilnutgrund (1.5) und der Dichtfläche (4.2) des Dichtelementes (4) herstellt;1.8 der Kanal (4.1) ist - in Umlaufrichtung des Ritzels (2) gesehen - vom Fleisch des Dichtelementes (4) umschlossen;1.9 das Dichtelement (4) ist in der Profilnut (1.4) in radialer Richtung unter Bildung eines zwischen der Außenfläche des Dichtelementes (4) und der Innenfläche der Profilnut (1.4) gebildeten Spaltes (5) begrenzt verschiebbar, so daß der Profilnutgrund (1.5) mit der Druckseite in leitender Verbindung steht;
gekennzeichnet durch die folgenden Merkmale:1.10 Dichtelement (4) und/oder Profilnut (1.4) sind derart gestaltet, daß die die Durchflußmenge des Steuerölstromes bestimmende Weite des Spaltes (5) bei jeder beliebigen Radialposition des Dichtelementes (4) im wesentlichen gleich groß ist. - Innenzahnradpumpe nach Anspruch 1, dadurch gekennzeichnet, daß das Dichtelement (4) - in einem Axialschnitt gesehen - einen schwalbenschwanzförmigen Teil umfaßt, und daß im Bereich dieses schwalbenschwanzförmigen Teiles entweder in die Außenfläche des Dichtelementes (4) oder in die Innenfläche der Profilnut (1.4) wenigstens eine Nut eingelassen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19804134 | 1998-02-03 | ||
DE19804134A DE19804134A1 (de) | 1998-02-03 | 1998-02-03 | Sichellose Innenzahnradpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0933530A1 EP0933530A1 (de) | 1999-08-04 |
EP0933530B1 true EP0933530B1 (de) | 2004-03-03 |
Family
ID=7856473
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98120951A Expired - Lifetime EP0933530B1 (de) | 1998-02-03 | 1998-11-05 | Sichellose Innenzahnradpumpe |
Country Status (8)
Country | Link |
---|---|
US (1) | US6095782A (de) |
EP (1) | EP0933530B1 (de) |
JP (1) | JPH11270466A (de) |
KR (1) | KR19990071433A (de) |
AT (1) | ATE261064T1 (de) |
DE (2) | DE19804134A1 (de) |
DK (1) | DK0933530T3 (de) |
ES (1) | ES2221969T3 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6273695B1 (en) * | 1999-03-26 | 2001-08-14 | Voith Turbo Gmbh & Co. Kg | Sickleless internal gear wheel pump with sealing elements inserted into the tooth tips |
Family Cites Families (8)
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 |
GB1155084A (en) * | 1965-08-21 | 1969-06-18 | Concentric Engineering Ltd | Improvements relating to Rotary Fluid Pumps and Motors |
DE2528990A1 (de) * | 1975-06-28 | 1977-01-27 | Wolfgang Von Dr Ing Preen | Verfahren zum spalten von oel-in- wasser emulsionen |
DE4140293C2 (de) * | 1991-12-06 | 1994-06-01 | Voith Gmbh J M | Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen |
EP0563661A1 (de) * | 1992-03-19 | 1993-10-06 | J.M. Voith GmbH | Sichellose Innenzahnradpumpe mit radial beweglichen Dichtelementen zur Radialkompensation |
EP0607497B1 (de) * | 1993-01-18 | 1996-06-12 | J.M. Voith GmbH | Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen |
DK0661454T3 (da) * | 1993-12-17 | 1999-09-13 | J M Voith Gmbh & Co Beteiligun | Seglfri tandhjulspumpe med indvendig fortanding |
DE19712169C1 (de) * | 1997-03-22 | 1998-03-12 | Voith Turbo Kg | Sichellose Innenzahnradpumpe mit in den Zahnköpfen eingesetzten Dichtelementen |
-
1998
- 1998-02-03 DE DE19804134A patent/DE19804134A1/de not_active Ceased
- 1998-11-05 DE DE59810908T patent/DE59810908D1/de not_active Expired - Lifetime
- 1998-11-05 AT AT98120951T patent/ATE261064T1/de not_active IP Right Cessation
- 1998-11-05 ES ES98120951T patent/ES2221969T3/es not_active Expired - Lifetime
- 1998-11-05 EP EP98120951A patent/EP0933530B1/de not_active Expired - Lifetime
- 1998-11-05 DK DK98120951T patent/DK0933530T3/da active
- 1998-12-08 KR KR1019980053774A patent/KR19990071433A/ko not_active Application Discontinuation
-
1999
- 1999-01-22 US US09/234,858 patent/US6095782A/en not_active Expired - Fee Related
- 1999-02-03 JP JP11025924A patent/JPH11270466A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE19804134A1 (de) | 1999-08-12 |
US6095782A (en) | 2000-08-01 |
KR19990071433A (ko) | 1999-09-27 |
EP0933530A1 (de) | 1999-08-04 |
DK0933530T3 (da) | 2004-07-05 |
ATE261064T1 (de) | 2004-03-15 |
ES2221969T3 (es) | 2005-01-16 |
DE59810908D1 (de) | 2004-04-08 |
JPH11270466A (ja) | 1999-10-05 |
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