EP0686771A2 - Pompe à engrenages internes avec joint d'étanchéité incorporé dans les dents - Google Patents

Pompe à engrenages internes avec joint d'étanchéité incorporé dans les dents Download PDF

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Publication number
EP0686771A2
EP0686771A2 EP95107368A EP95107368A EP0686771A2 EP 0686771 A2 EP0686771 A2 EP 0686771A2 EP 95107368 A EP95107368 A EP 95107368A EP 95107368 A EP95107368 A EP 95107368A EP 0686771 A2 EP0686771 A2 EP 0686771A2
Authority
EP
European Patent Office
Prior art keywords
internal gear
ring gear
pinion
gear pump
control
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.)
Granted
Application number
EP95107368A
Other languages
German (de)
English (en)
Other versions
EP0686771A3 (fr
EP0686771B1 (fr
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.)
JM Voith SE and Co KG
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 EP0686771A2 publication Critical patent/EP0686771A2/fr
Publication of EP0686771A3 publication Critical patent/EP0686771A3/fr
Application granted granted Critical
Publication of EP0686771B1 publication Critical patent/EP0686771B1/fr
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
    • 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
    • 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
    • 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 with sealing elements inserted into the tooth heads and driven on the back via pressure channels according to the preamble of claim 1.
  • a pump of the generic type is known as a special embodiment from DE 41 40 293 A1, which in turn is based on a prior art according to DE 41 04 397 A1.
  • P 43 01 104.7 in view of the inventions mentioned, in connection with the optimization of the pressure build-up between the opposing tooth tips of the ring gear and pinion, a back pressure application of the sealing (or radial) elements was already proposed.
  • the constructive implementation of this proposal is based on the fact that the sealing element has a plurality of bores or a lateral groove, via which the back of the sealing element is subjected to a partial pressure of the working pressure.
  • the object on which the present invention is based is to provide a simpler and therefore less expensive solution for pressurizing the radial elements on the rear side.
  • At least one axial control slot is incorporated on at least one side of the part of the housing which laterally delimits the ring gear and the pinion.
  • the essence of the present invention is to no longer incorporate the "control grooves" for relieving the contact pressure of the radial element in the pressure build-up zone into the radial elements themselves, but rather in the spatial area of the pressure build-up zone in the rotating toothed parts (ring gear and pinion) adjacent area of the housing to verify machined axial grooves or slots.
  • the "control chamber" in the ring gear is on the one hand with the leading and on the other hand with the trailing over a larger effective area relative to the control chamber width by two groups of axial grooves machined parallel to one another in the housing Tooth gap connected, without a (communicating) connection between the adjacent tooth gaps.
  • the hydraulic pressure in the "control chamber” is controlled by an axial control slot in the housing, which temporarily connects two tooth gaps to one another and which, through its cross-sectional shape which is variable via the angle of rotation, enables any pressure setting in the control chamber.
  • 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 area of a housing middle part, which - viewed in the axial direction - is followed by further housing parts.
  • An externally toothed pinion 5 fastened on a pinion 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 which is greater than the pitch circle diameter of the pinion 5.
  • This pinion 5 and the ring gear 6 are not coaxial, but eccentric to each other; 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 on the ring gear 6 disengage when rotated in the direction of the arrow X.
  • the suction port 7 in the middle part 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 which adjoins the adjacent housing part extends part of the outer surface 20 of the ring gear 6.
  • a pressure connection 10 is located, likewise starting from a pressure pocket extending over a circumferential area on the ring gear 6, on the opposite side of the pump.
  • radially movable (arrow Y), preferably mushroom-shaped sealing elements 30 are used on the tooth heads of the ring gear 6 in a manner known per se, but in no way restrictive, which are in a complementary profile groove 34 stored or held.
  • FIGS. 2 and 3 show a section of the internal gear pump shown in FIG. 1 and explained above, specifically in the region of the pressure build-up zone Z adjoining the so-called dead center TP of the pump.
  • the representations according to FIGS. 2 and 3 are clear it can be seen how the functional separation of the suction and pressure chamber of the internal gear pump takes place via the relative movement between the ring gear 6 and the pinion 5 and via the sealing elements 30.
  • the subject of the present invention is the control of the so-called control spaces 35 of the sealing elements 30, ie the free space on the rear between the underside of the sealing elements 30 and the base of the profile grooves 34 Activation takes place via axial grooves incorporated into the housing 19 (see FIG. 4) which laterally delimit the toothing parts (ring gear 6 and pinion 5) - namely via a plurality of grooves 40 which are incorporated obliquely in the area of the dead center TP with a negative angle of attack are (Fig. 2) and a (second) plurality of grooves 41, which are incorporated obliquely with a positive angle of attack, viewed in the direction of rotation X, behind the dead center TP (Fig. 3).
  • the control chamber 35 of the sealing element 30 that exceeds the dead center TP now always has the same pressure as that of the controlled tooth gap.
  • FIG. 4 shows a sectional view corresponding to the section line A-B according to FIG. 3, on the one hand to show the arrangement of the grooves 41 in the housing 19 and on the other hand their shape as, for example, rectangular milling.
  • a communicating connection between the control chamber 35 of the leading sealing element (30.v in FIG. 3) and the trailing tooth gap 16.n is opened in succession via the grooves 41.
  • the control slot 45 viewed in the circumferential direction, can be curved (see illustration) or run straight; With regard to its cross-sectional shape, the control slot 45 can be designed variably, so that the partial pressure acting in the control chamber 35 can be optimized via the cross-sections effective depending on the angular position (compare I and II).
  • the above-mentioned geometric relationships are also shown enlarged with reference to FIG. 7 along the section line C-D according to FIG. 6.
  • the control slot 45 in the housing 19 connects the adjacent tooth gaps 16.x and 16.y and initiates a partial pressure corresponding to the cross sections I and II in the control chamber 35 of the conjugated sealing element 30.
  • FIGS. 2/3/4 on the one hand and FIGS. 5/6/7 on the other hand are each suitable for solving the object on which the present invention is based.
  • This configuration is shown in FIG. 8 in two views, partially in section.
  • control chamber 35 formed in the tooth head 14 of the ring gear 6 at the base of the sealing element 30 is pressurized once via a control slot 45 machined in the circumferential direction analogously to the exemplary embodiment described with reference to FIGS. 5/6/7; on the other hand, the control chamber 35 is also connected to the trailing tooth space 16.n via the (here three) grooves 41.
  • the latter grooves 41 also have a rectangular cross-sectional shape, for example.
  • the control slot 45 is bent along the circumferential line of the control spaces 35 and is formed over its entire length as a conical fillet groove tapering on both sides.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP95107368A 1994-06-08 1995-05-16 Pompe à engrenages internes avec joint d'étanchéité incorporé dans les dents Expired - Lifetime EP0686771B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4419975 1994-06-08
DE4419975A DE4419975A1 (de) 1994-06-08 1994-06-08 Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten, rückseitig über Druckkanäle angesteuerten Dichtelementen

Publications (3)

Publication Number Publication Date
EP0686771A2 true EP0686771A2 (fr) 1995-12-13
EP0686771A3 EP0686771A3 (fr) 1996-08-14
EP0686771B1 EP0686771B1 (fr) 1999-07-28

Family

ID=6520060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95107368A Expired - Lifetime EP0686771B1 (fr) 1994-06-08 1995-05-16 Pompe à engrenages internes avec joint d'étanchéité incorporé dans les dents

Country Status (8)

Country Link
US (1) US5582514A (fr)
EP (1) EP0686771B1 (fr)
JP (1) JPH0842460A (fr)
KR (1) KR960001491A (fr)
AT (1) ATE182660T1 (fr)
DE (2) DE4419975A1 (fr)
DK (1) DK0686771T3 (fr)
ES (1) ES2135626T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0911524A1 (fr) * 1997-10-23 1999-04-28 Robert Bosch Gmbh Pompe à engrenages internes

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6106256A (en) * 1998-04-20 2000-08-22 Walbro Corporation Gear rotor fuel pump
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
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 (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2866417A (en) * 1956-06-11 1958-12-30 Hanomag Ag Rotary piston machine
US3680989A (en) * 1970-09-21 1972-08-01 Emerson Electric Co Hydraulic pump or motor
JPS61138893A (ja) * 1984-12-07 1986-06-26 Aisin Seiki Co Ltd トロコイド型オイルポンプ
DE4104397C2 (de) * 1990-03-09 1993-12-16 Voith Gmbh J M Innenzahnradpumpe
JPH0579466A (ja) * 1991-09-18 1993-03-30 Toyooki Kogyo Co Ltd 内接型ギアポンプ
DE4140293C2 (de) * 1991-12-06 1994-06-01 Voith Gmbh J M Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen
JP2657963B2 (ja) * 1992-12-18 1997-09-30 株式会社ポリマーシステムズ 充填装置
ATE139305T1 (de) * 1993-01-18 1996-06-15 Voith Gmbh J M Sichellose innenzahnradpumpe mit in die zahnköpfe eingesetzten dichtelementen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0911524A1 (fr) * 1997-10-23 1999-04-28 Robert Bosch Gmbh Pompe à engrenages internes

Also Published As

Publication number Publication date
EP0686771A3 (fr) 1996-08-14
US5582514A (en) 1996-12-10
DE59506453D1 (de) 1999-09-02
DK0686771T3 (da) 2000-02-28
JPH0842460A (ja) 1996-02-13
ES2135626T3 (es) 1999-11-01
KR960001491A (ko) 1996-01-25
EP0686771B1 (fr) 1999-07-28
ATE182660T1 (de) 1999-08-15
DE4419975A1 (de) 1995-12-14

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