EP0845596B1 - Sichellose Innenzahnradpumpe mit in die Zahnköpfe federnd eingesetzten Dichtelementen - Google Patents

Sichellose Innenzahnradpumpe mit in die Zahnköpfe federnd eingesetzten Dichtelementen Download PDF

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Publication number
EP0845596B1
EP0845596B1 EP97119840A EP97119840A EP0845596B1 EP 0845596 B1 EP0845596 B1 EP 0845596B1 EP 97119840 A EP97119840 A EP 97119840A EP 97119840 A EP97119840 A EP 97119840A EP 0845596 B1 EP0845596 B1 EP 0845596B1
Authority
EP
European Patent Office
Prior art keywords
internal gear
sealing element
pinion
empty
spring
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
Application number
EP97119840A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0845596A1 (de
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
Publication of EP0845596A1 publication Critical patent/EP0845596A1/de
Application granted granted Critical
Publication of EP0845596B1 publication Critical patent/EP0845596B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 present invention relates to a sickle-free internal gear pump for Generation of high pressure according to the preamble of patent claims 1 or 2nd
  • a pump of this generic type is special Embodiment known from DE 41 40 293 C2 (EP 0 545 424 A1).
  • Internal gear pumps generally have an internal gear with which an externally toothed pinion meshes with fewer teeth, i.e. is drivingly engaged.
  • the gearing is such Pumps - based on the diameter of the pinion or the ring gear - relatively narrow, so that after the volume flow to be conveyed through the The height of the teeth and the width of the toothing is determined by this Volume flow for common pumps for design reasons is limited.
  • Sickle-free internal gear pumps have the particular advantage of a minimal construction volume.
  • the present invention is based on the problem, a sickle-free internal gear pump of the generic type to specify at the aforementioned problem does not exist a priori.
  • the essence of the present invention is that To configure the sealing element so that it integrates the spring element Part includes or is designed so that it has a resilient part.
  • 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 is in engagement with an internally toothed pinion Ring gear 6 and thus forms a toothing 12.
  • the pinion 5 and the ring gear 6 are not coaxial, but eccentric to each other; furthermore that Pinion 5 one tooth less than the ring gear 6, so that each Outside of a tooth head 13 on the pinion 5 with the inside of a Toothed head 14 comes into contact with the ring gear 6.
  • Suction port 7 in the zone where the rotation in the direction of arrow X Teeth on pinion 5 or ring gear 6 are out of engagement.
  • a pressure connection 10 is located also starting from a ring gear 6 over a circumferential area extending pressure pocket 11, on the opposite side of the pump. The inflow from the pressure medium to the interior of the pump, i.e. to the Tooth gaps in the pinion 5 and the ring gear 6, which promote the Cause pressure medium takes place via - compare Fig. 2 - radial Breakthroughs 17 in the ring gear 6. These breakthroughs 17 go from Shell surface 20 of the ring gear 6 and open into the tooth base.
  • each sealing elements 30 used, according to the present invention are specially designed. These sealing elements 30 according to the invention are shown in Figures 2a / b and 3 enlarged.
  • Fig. 2a shows a section of the (pinion 5 / ring gear 6-) teeth 12 in Area of three tooth heads 13 / 14. Over the circumference of the ring gear 6 are considered for the inflow of the pressure medium to the interior of the Internal gear pump provided openings 17 incorporated.
  • the sealing element 30 itself is - as is known per se - radially movable (compare arrow Y) in a complementary to the cross section of the Sealing element 30 formed profile groove 34 in the tooth head 14 of the ring gear 6 assembled or used. This allows a radially directed displacement Verify the sealing element 30 in the profile groove 34.
  • the said Radial displacement is limited on both sides, on the one hand by an the brim adjoining the end face 33; the second stop is by a positive stop 38 of the foot part 39 of the sealing element 30 realized on the conjugate side surface 40 of the profile groove 34. Between these the two stops, the sealing element 30 can thus move radially.
  • this has Sealing element 30 approximately the cross-sectional shape of a mushroom, the in Rotation direction X looks at the leading foot part conically in the direction Shell surface 20 of the ring gear 6 is widened.
  • the aforementioned fixed stop 38 results from the complementary edge formation of the profile groove 34.
  • the sealing element 30 is at the bottom of the Profile groove 34 via a molded or injected in the foot part of the sealing element 30 Spring 42 on. This ensures that the sealing element 30 on the one hand is always pressed against the side surfaces of the profile groove 34 and on the other hand is pressed sealingly against the tooth head 13 of the pinion 5 when the Toothed heads 13/14 of pinion 5 and ring gear 6 are opposite.
  • the sealing element 30 according to the invention is corresponding to FIG Section line A-B shown constructively.
  • This representation according to Fig. 2b shows the ring gear / pinion pairing, between the pinion 5 and the Ring gear 6 is a sealing element 30 which is at the bottom of the profile groove 34 of the Ring gear 6 abuts via a (so-called corrugated) spring.
  • This spring 42 will inserted into the injection mold during the injection process for the sealing element 30 and so immediately (quasi as a captive component) into the sealing element 30 injected. This thus includes the spring 42 as an integral part, so that only a part has to be assembled when installing the pump.
  • Fig. 3 shows the same section (pinion 5 / ring gear 6) toothing 12 as Fig. 2a.
  • the sealing element 30 itself is here trained or designed that the spring action or bias for the Positive / frictional engagement of the sealing element 30 in the profile groove 34 from itself the shape design results.
  • This is achieved according to the invention in that the sealing element 30 has an undercut 43 in the region of the foot part has, so that the sealing element 30 is not over the entire cross section or - compare illustration - only via a lip 44 at the bottom of the Profile groove 34 rests.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP97119840A 1996-11-27 1997-11-13 Sichellose Innenzahnradpumpe mit in die Zahnköpfe federnd eingesetzten Dichtelementen Expired - Lifetime EP0845596B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19649180 1996-11-27
DE19649180A DE19649180A1 (de) 1996-11-27 1996-11-27 Sichellose Innenzahnradpumpe mit in die Zahnköpfe federnd eingesetzten Dichtelementen

Publications (2)

Publication Number Publication Date
EP0845596A1 EP0845596A1 (de) 1998-06-03
EP0845596B1 true EP0845596B1 (de) 2002-08-28

Family

ID=7812946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97119840A Expired - Lifetime EP0845596B1 (de) 1996-11-27 1997-11-13 Sichellose Innenzahnradpumpe mit in die Zahnköpfe federnd eingesetzten Dichtelementen

Country Status (6)

Country Link
EP (1) EP0845596B1 (da)
JP (1) JPH10159752A (da)
DE (2) DE19649180A1 (da)
DK (1) DK0845596T3 (da)
ES (1) ES2179255T3 (da)
TW (1) TW474370U (da)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140314608A1 (en) * 2011-11-10 2014-10-23 Toyota Jidosha Kabushiki Kaisha Internal-gear-type oil pump for vehicle
CN104895781A (zh) * 2014-09-17 2015-09-09 襄阳博亚精工装备股份有限公司 一种内啮合齿轮泵

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1293169A (fr) * 1961-03-31 1962-05-11 Renault Segments fractionnés
DE1189788B (de) * 1962-07-24 1965-03-25 Daimler Benz Ag Radialdichtung fuer Rotationskolben-Brennkraftmaschinen
US3277833A (en) * 1964-03-16 1966-10-11 Trw Inc Hydraulic device
DE2221131A1 (de) * 1972-04-28 1973-11-08 Arno Fischer Umlaufkolbenmaschine
US3972660A (en) * 1975-11-12 1976-08-03 Caterpillar Tractor Co. Corner seals for rotary mechanisms
US5203307A (en) * 1989-06-29 1993-04-20 Burtis Wilson A Rotary wankel type engine
DE4140293C2 (de) * 1991-12-06 1994-06-01 Voith Gmbh J M Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen

Also Published As

Publication number Publication date
DE59708057D1 (de) 2002-10-02
EP0845596A1 (de) 1998-06-03
JPH10159752A (ja) 1998-06-16
TW474370U (en) 2002-01-21
DE19649180A1 (de) 1998-05-28
ES2179255T3 (es) 2003-01-16
DK0845596T3 (da) 2002-12-23

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