EP0545424B1 - Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen - Google Patents

Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen Download PDF

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Publication number
EP0545424B1
EP0545424B1 EP92120694A EP92120694A EP0545424B1 EP 0545424 B1 EP0545424 B1 EP 0545424B1 EP 92120694 A EP92120694 A EP 92120694A EP 92120694 A EP92120694 A EP 92120694A EP 0545424 B1 EP0545424 B1 EP 0545424B1
Authority
EP
European Patent Office
Prior art keywords
sealing element
pinion
ring gear
internal gear
gear 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.)
Expired - Lifetime
Application number
EP92120694A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0545424A1 (de
Inventor
Peter Peiz
Franz Arbogast
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.)
JM Voith GmbH
Original Assignee
JM Voith 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
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0545424A1 publication Critical patent/EP0545424A1/de
Application granted granted Critical
Publication of EP0545424B1 publication Critical patent/EP0545424B1/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
    • 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
    • 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 generating high pressure according to the preamble of claim 1.
  • a pump of this generic type is known as a special embodiment from DE 41 04 397 A1.
  • Internal gear pumps generally have an internally toothed ring gear with which an externally toothed pinion meshes with a smaller number of teeth, i.e. is drivingly engaged.
  • the toothing of such pumps - based on the diameter of the pinion or the ring gear - is relatively narrow, so that - after the volume flow to be conveyed is determined by the height of the teeth and the width of the toothing, this volume flow in conventional pumps is limited for design reasons.
  • Sickle-free internal gear pumps have the particular advantage of a minimal construction volume.
  • the US 28 66 417 describes an internal gear pump, in which essentially the entire tooth is designed as a sealing element.
  • the tooth thus has two functions to perform: on the one hand, it must transmit torque, and on the other hand, it must seal.
  • the present invention is based on the problem of specifying a sickle-free internal gear pump of the generic type, with which the sealing effect when pressure builds up between the opposing tooth tips of the gear wheels is improved without the manufacturing effort increasing disproportionately and with the result that the aforementioned inadequacies (pressure pulsation, Noise) are eliminated.
  • the essence of the present invention lies in replacing the tooth tips of the ring gear or pinion with an equivalent, ie equivalent, use, due to its specific Design or shape in the area of the pressure build-up realizes a surface seal and thus ensures a minimal gap between the pinion head and the ring gear head. This also improves the volumetric efficiency, which ultimately has the consequence that the internal gear pump is suitable for higher pressures. Likewise, the extreme efforts required to minimize the gap when manufacturing or assembling an internal gear pump are eliminated; For example, there is no need to jointly spindle out the slide bearings of the bearing caps of an internal gear pump. With regard to the production of ring gears, it should be noted that the elaborate and complicated profile grinding of the hollow head shape can be omitted, because this is verified by a separate, and therefore less expensive to use insert.
  • a particular advantage of the concept according to the invention is that a sensible pressure build-up control via control slots is possible via the radial compensation achieved.
  • FIG. 1 shows in a cross section a sickle-free, head-sealing and play-afflicted internal gear pump, each with a flank sealing, in the region of a middle housing part 1, which - viewed in the axial direction - Connect further housing parts.
  • the entire pump with the three housing parts has an overall axial length L.
  • An externally toothed pinion 5 fastened to a drive shaft 4 is in engagement with an internally toothed ring gear 6.
  • the toothing 12 of the pinion 5 and the ring gear 6 has an axial width B, the pinion one Pitch circle diameter dO; the width of the toothing is larger than the pitch circle diameter dO.
  • the pinion 5 and the ring gear 6 are not mounted coaxially, but eccentrically to one another; furthermore, the pinion 5 has one tooth less than the ring gear 6, so that in each case the outside of a tooth head 13 on the pinion 5 comes into contact with the inside of a tooth head 14 on the ring gear 6.
  • a suction connection 7 can also be seen in the zone in which the teeth on the pinion 5 or ring gear 6 disengage when rotated in the direction of the arrow X.
  • the suction connection 7 in the middle part 1 of the housing, in which the ring gear 6 and the pinion 5 are mounted, is followed in the axial direction by a suction pocket 8, which extends over part of the outer surface 20 of the ring gear 6, to the adjacent housing parts.
  • a pressure connection 10 is located on the opposite side of the pump, likewise starting from a pressure pocket 11 which extends over a peripheral region on the ring gear.
  • sealing elements 30 are now used in a manner known per se on the tooth heads of the ring gear 6, which are specially designed and mounted or held according to the present invention. These sealing elements 30 according to the invention are shown enlarged in FIG. 2.
  • FIG. 2 shows a section of the ring gear 6 in the region of a tooth head 14.
  • the openings 17 provided for the inflow of the pressure medium to the interior of the internal gear pump are incorporated.
  • the sealing elements 30 are each used in the transition area between an opening 17 and a tooth head 14 and in such a way that an overlap area (undercut) 32 is formed towards the opening 17.
  • the outer end face 33 of the sealing element 30, that is to say on the head side, is designed such that when the sealing element 30 is arranged symmetrically relative to a tooth head 14, its nominal head shape, i.e. whose geometric ideal shape corresponds exactly.
  • the sealing element 30 itself is - as is known at the view - radially movable (see arrow Y) in a complementary to the cross section of the sealing element 30 formed profile groove 34 mounted or inserted in the tooth head 14.
  • a radially directed displacement of the sealing element 30 in the profile groove 34 can thus be verified.
  • Said radial displacement is limited on both sides, on the one hand by a rim adjoining the rounded or profiled end face 33 with a conjugated stop face 37 of the sealing element 30 which abuts a complementary stop face 36 of the tooth head 14; the second stop is a positive one Fixed stop 38 of the foot part 39 of the sealing element 30 realized on the conjugated side surface 40 of the profile groove 34. Between these two stops, the sealing element 30 can thus be moved radially to the extent of the gap width Z.
  • the sealing element 30 has approximately the cross-sectional shape of a mushroom, the foot part lagging in the direction of rotation X of the ring gear 6 being widened conically in the direction of the lateral surface 20. Said fixed stop 38 thus results from the complementary wall formation of the profile groove 34.
  • a free space 41 which is open to the pressure chamber of the pump via the undercut 32 or the cut of the opening 17.
  • a spring element in particular a wave spring 42, is located opposite the foot of the sealing element 30 in the free space 41.
  • the material of the sealing element 30 must have good running-in properties, so that only non-ferrous metal or fiber-reinforced plastic can be used as the material.
  • sealing element 30 according to the invention was only disclosed in connection with a ring gear 6 in the foregoing with reference to FIG. 2, sealing elements which meet the specified conditions can also be installed in the pinion 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP92120694A 1991-12-06 1992-12-04 Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen Expired - Lifetime EP0545424B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4140293 1991-12-06
DE4140293A DE4140293C2 (de) 1991-12-06 1991-12-06 Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen

Publications (2)

Publication Number Publication Date
EP0545424A1 EP0545424A1 (de) 1993-06-09
EP0545424B1 true EP0545424B1 (de) 1995-03-08

Family

ID=6446459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92120694A Expired - Lifetime EP0545424B1 (de) 1991-12-06 1992-12-04 Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen

Country Status (6)

Country Link
US (1) US5399079A (ja)
EP (1) EP0545424B1 (ja)
JP (2) JPH06193566A (ja)
AT (1) ATE119627T1 (ja)
DE (2) DE4140293C2 (ja)
ES (1) ES2070575T3 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19746769C1 (de) * 1997-10-23 1999-02-11 Bosch Gmbh Robert Sichellose Innenzahnradmaschine

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2090799T3 (es) * 1993-01-18 1996-10-16 Voith Gmbh J M Bomba de ruedas con dentado interior sin hoz con elementos obturadores integrados en las cabezas de los dientes, que presentan una seccion fungiforme.
EP0661454B1 (de) * 1993-12-17 1999-01-27 J.M. Voith GmbH & Co. Beteiligungen KG Sichellose Innenzahnradpumpe
DE4419975A1 (de) * 1994-06-08 1995-12-14 Voith Gmbh J M Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten, rückseitig über Druckkanäle angesteuerten Dichtelementen
DE4421255C1 (de) * 1994-06-17 1995-06-29 Otto Eckerle Füllstücklose Innenzahnradpumpe
DE19517296C2 (de) * 1995-05-11 2000-08-03 Otto Eckerle Füllstücklose Innenzahnradpumpe
DE19649180A1 (de) * 1996-11-27 1998-05-28 Voith Turbo Kg Sichellose Innenzahnradpumpe mit in die Zahnköpfe federnd eingesetzten Dichtelementen
DE19712169C1 (de) * 1997-03-22 1998-03-12 Voith Turbo Kg Sichellose Innenzahnradpumpe mit in den Zahnköpfen eingesetzten Dichtelementen
DE19717697B4 (de) * 1997-04-26 2005-07-14 Robert Bosch Gmbh Innenzahnradmaschine
DE19804134A1 (de) * 1998-02-03 1999-08-12 Voith Turbo Kg Sichellose Innenzahnradpumpe
EP1039135A3 (de) * 1999-03-26 2001-12-19 Voith Turbo GmbH & Co. KG Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen
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
KR20020019149A (ko) * 2000-09-05 2002-03-12 이계안 기어식 오일펌프
IT1394550B1 (it) * 2009-06-08 2012-07-05 Valentini Rotore autoinnescante per motore pneumatico a palette.
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 (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1075124B (de) * 1960-02-11 Borsig Aktiengesellschaft Berlin Tegel und Felix Wankel, Lindau (Boden see) Drehkolbenmaschine mtt xzentrisch ineinander angeordneten und miteinander verzahnten Drehkolben
GB404424A (en) * 1932-10-19 1934-01-18 Aladar Ledacskiss Improvements in or relating to rotary toothed-wheel engines
US2866417A (en) * 1956-06-11 1958-12-30 Hanomag Ag Rotary piston machine
DE1263973B (de) * 1956-07-17 1968-03-21 Borsig Ag Innerer Drehkolben einer Drehkolbenmaschine mit exzentrisch ineinander angeordneten Drehkolben
US3277833A (en) * 1964-03-16 1966-10-11 Trw Inc Hydraulic device
DE2451669C3 (de) * 1974-10-31 1978-11-23 Wabco Westinghouse Gmbh, 3000 Hannover Dichtleiste für eine Rotationskolbenmaschine
DE2456252B2 (de) * 1974-11-28 1977-06-30 Kernforschungsanlage Jülich GmbH, 517OJuIiCh Abdichtungsvorrichtung fuer eine drehkolbenmaschine in trochoidenbauart
JPS5660801A (en) * 1979-10-20 1981-05-26 Kawasaki Heavy Ind Ltd Rotary fluid machine
DE3702558A1 (de) * 1987-01-29 1988-09-01 Pierburg Gmbh Innenachsige drehkolbenmaschine
DE4104397C2 (de) * 1990-03-09 1993-12-16 Voith Gmbh J M Innenzahnradpumpe
CH682939A5 (de) * 1990-03-09 1993-12-15 Voith Gmbh J M Innenzahnradpumpe.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19746769C1 (de) * 1997-10-23 1999-02-11 Bosch Gmbh Robert Sichellose Innenzahnradmaschine

Also Published As

Publication number Publication date
ATE119627T1 (de) 1995-03-15
DE4140293C2 (de) 1994-06-01
US5399079A (en) 1995-03-21
JPH1037U (ja) 1998-02-13
EP0545424A1 (de) 1993-06-09
ES2070575T3 (es) 1995-06-01
DE4140293A1 (de) 1993-06-09
DE59201606D1 (de) 1995-04-13
JP2606398Y2 (ja) 2000-10-23
JPH06193566A (ja) 1994-07-12

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