EP0661454B1 - Pompe à engrenages internes - Google Patents

Pompe à engrenages internes Download PDF

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Publication number
EP0661454B1
EP0661454B1 EP94118669A EP94118669A EP0661454B1 EP 0661454 B1 EP0661454 B1 EP 0661454B1 EP 94118669 A EP94118669 A EP 94118669A EP 94118669 A EP94118669 A EP 94118669A EP 0661454 B1 EP0661454 B1 EP 0661454B1
Authority
EP
European Patent Office
Prior art keywords
internal gear
pinion
tooth
sealing element
ring 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.)
Expired - Lifetime
Application number
EP94118669A
Other languages
German (de)
English (en)
Other versions
EP0661454A1 (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 and Co Beteiligungen 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 JM Voith GmbH and Co Beteiligungen KG filed Critical JM Voith GmbH and Co Beteiligungen KG
Publication of EP0661454A1 publication Critical patent/EP0661454A1/fr
Application granted granted Critical
Publication of EP0661454B1 publication Critical patent/EP0661454B1/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
    • 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 invention is based on a sickle-free internal gear pump for generating high pressure with those in the preamble of claim 1 specified features.
  • a pump this genus is a special embodiment known from DE 41 04 397 A1.
  • Internal gear pumps of this known type generally have an internally toothed ring gear with which a externally toothed pinion meshes, that is, drivingly engaged stands.
  • This sprocket has one tooth less than the ring gear.
  • the pinion is so eccentric to the ring gear arranged that in each case the outside of a tooth head on the pinion with the inside of a tooth head on the ring gear in Touch comes.
  • the generic gear pumps show continue to have a suction port in the area where Rotation of the pinion disengage the teeth.
  • Corresponding show a pressure port on the suction port opposite side where the teeth come back in Interfered.
  • the promotion of the print medium in or out of the interior of the ring gear by in essential radial breakthroughs guaranteed. This Breakthroughs start from the outer surface of the ring gear and flow into its tooth base.
  • the circumference of the ring gear thus divides into a suction space, in which the pressure medium from the suction port on the Breakthroughs is sucked in, and a pressure chamber in which the Pressure medium from the inside of the ring gear on the Breakthroughs is pressed outwards. These are separate two areas in tooth mesh through the so-called dead center the gearing.
  • GB-A-793 089 shows and describes a sickle-free gear pump in which the teeth of the pinion always rest on the ring gear. This makes numerous Single chambers created. This makes the control complex and laborious. There are also in the sealing area between the suction side and pressure side the heads of the pinion in the gaps of the ring gear. There are Movable sealing elements are provided, which are also used for the transfer of Serve torque. That is why this pump is only for very low pressures suitable.
  • EP-A-0 545 424 describes an internal gear pump in which the head of the sealing element does not rest on the foot of the pinion. Rather there is Free space between the head of the sealing element and the foot of the pinion. When pressure builds up, the pinion head and ring gear head face each other. This internal gear pump has no involute toothing.
  • the problem underlying the present invention is a sickle-free internal gear pump with involute toothing (i.e. with a large operating pressure angle) where the theoretical, specific funding volume is promoted without the volumetric efficiency losses are recorded.
  • the sealing element is used to achieve the object in terms of its head shape so that it with the foot shape of the tooth gap of the ring gear or the Ritzels works together sealingly.
  • This sealing effect is through the sealing element in connection with the foot of the tooth gap given in the area of the dead space.
  • Sealing effect due to the abutting flanks see above that the pump of the invention has an enlarged Area of the pressure chamber with good sealing effect.
  • This expansion of the sealing action area creates one Improvement of the pump efficiency, since now according to the invention more pressure medium with a good sealing effect from the Pressure chamber gets into the pressure connection.
  • the pressure medium to the rear via axial grooves of the sealing elements.
  • axial grooves are arranged in the housing part, in which the pinion is rotatably mounted or at Pump version with axial compensation in the axial washers.
  • Figures 1, 2 and 3 show in a longitudinal section sickle-free internal gear pump or in a cross section Arrangement and mode of operation of the gears.
  • the internal gear pump shows a housing that consists of the Housing middle part 1 and the housing side parts 2,3.
  • the two housing side parts 2, 3 seal the middle housing part 1, inside of which the internally toothed Ring gear 6 is arranged with an externally toothed pinion 5 is.
  • the pinion 5 is fixed on a drive shaft 4 and drives over its gearing 12, which in the Interlocking teeth 12 of the ring gear engages this.
  • the Pinion 5 and the ring gear 6 are not coaxial, but arranged eccentrically to each other; also has the pinion 5 one tooth less than the ring gear 6, so that each the outside of a tooth head 13 on the pinion 5 with the Inside of a tooth head 14 in contact with the ring gear is coming.
  • the flow of the pump medium is shown by the arrows Y indicated.
  • the housing parts 2, 3 show in the area of interlocking teeth 13, 14 axial grooves 40.
  • FIG. 4 shows a section of FIG. 3, in which the tooth heads 13, 14 engage in the tooth gaps of the pinion 5 or the ring gear 6.
  • the tooth heads 14 of the ring gear 6 have a mushroom-shaped sealing element, which is matched with respect to its cross-sectional shape to the root shape of the tooth space of the pinion 5.
  • the mushroom-shaped sealing element 30 is arranged in a radial profile groove 34 so that it can be moved radially displaceably over a certain margin.
  • the head of the sealing element 30 is convex and, in conjunction with the slightly concave foot shape of the tooth gap, ensures a good sealing effect.
  • This sealing effect of the sealing element 30 with the foot of the tooth gap occurs in addition to the flank seal of the teeth 13 of the pinion 5 with respect to the teeth 14 of the ring gear 6 during the advance.
  • the area in which the flank seal is effective ends before the dead center TP, ie within the pressure area. In this part of the pressure range, in which the flank seal does not work, only the sealing effect through the sealing element 30 in connection with the foot of the tooth gap is effective. Since this area can now be used according to the invention, the delivery volume of the pump medium and thus the efficiency of the pump is increased.
  • a pumped medium is also shown schematically in FIG axial groove 40 indicated in the housing part 2 or 3, via which a defined pressure of the sealing element 30 reached the foot of the tooth gap of the pinion 5 can be.
  • This axial groove 40, 40 ' is also indicated in Figure 1, 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Claims (2)

  1. Pompe à roues dentées intérieures sans lumière en croissant, équipée d'une roue creuse (6) à denture intérieure et d'un pignon (5) s'engrènent avec la roue creuse (6), montés à rotation dans une partie formant carter (1) montée conjointement, dont l'étendue axiale correspond à la largeur de la denture (12) de la roue creuse (6) et du pignon (5) et présentant un raccordement d'aspiration (7) et un raccordement de refoulement (10), la roue creuse (6) présentant des ouvertures radiales (17) destinées au fluide à pomper, et où dans les têtes de dent (14) de la roue creuse (6), respectivement dans les têtes de dent (13) du pignon (5), est respectivement inséré un élément d'étanchéité (30) mobile radialement dans une rainure profilée (34) de réalisation correspondante, et pouvant glisser sur la tête de dent, placée en face, du pignon (5), respectivement de la roue creuse (6), caractérisée en ce que la forme de tête de l'élément d'étanchéité (30) et la forme de pied de l'entre-dent du pignon (5) sont configurés et disposés de manière que l'espace de refoulement et l'espace d'aspiration sont également isolés de façon étanche l'un par rapport à l'autre, par l'élément d'étanchéité (30), dans la zone du point mort, là où un joint d'étanchéité de flanc des dents (13) du pignon (5) vis-à-vis des dents (14) de la roue creuse (6) est inefficace.
  2. Pompe à roues dentées intérieures sans lumière en croissant selon la revendication 1, caractérisée en ce que le ou les parties formant carter (2, 3) qui servent au montage étanche commun, à rotation, de la roue creuse (6) et du pignon (5), présentent dans la zone du point mort une rainure axiale (40) au moyen de laquelle le pressage de l'élément d'étanchéité (30) sur le fond de denture est commandé.
EP94118669A 1993-12-17 1994-11-28 Pompe à engrenages internes Expired - Lifetime EP0661454B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4343193 1993-12-17
DE4343193 1993-12-17

Publications (2)

Publication Number Publication Date
EP0661454A1 EP0661454A1 (fr) 1995-07-05
EP0661454B1 true EP0661454B1 (fr) 1999-01-27

Family

ID=6505348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94118669A Expired - Lifetime EP0661454B1 (fr) 1993-12-17 1994-11-28 Pompe à engrenages internes

Country Status (7)

Country Link
US (1) US5540573A (fr)
EP (1) EP0661454B1 (fr)
JP (1) JPH07197887A (fr)
AT (1) ATE176301T1 (fr)
DE (1) DE59407738D1 (fr)
DK (1) DK0661454T3 (fr)
ES (1) ES2129564T3 (fr)

Families Citing this family (8)

* 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
DE19804134A1 (de) * 1998-02-03 1999-08-12 Voith Turbo Kg Sichellose Innenzahnradpumpe
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
US8016356B2 (en) * 2006-07-31 2011-09-13 Toyota Boshoku Kabushiki Kaisha Gears and coupling apparatus using the gears
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
US11549507B2 (en) 2021-06-11 2023-01-10 Genesis Advanced Technology Inc. Hypotrochoid positive-displacement machine
US11761377B2 (en) 2022-02-02 2023-09-19 1159718 B.C. Ltd. Energy transfer machine
US11965509B2 (en) 2022-02-28 2024-04-23 Genesis Advanced Technology Inc. Energy transfer machine for corrosive fluids

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US748348A (en) * 1902-06-16 1903-12-29 Cooley Epicycloidal Engine Dev Company Rotary fluid-engine.
US2790394A (en) * 1952-09-02 1957-04-30 Gulf Research Development Co Internal-external gear pump with self-sealing tooth tips
GB793089A (en) * 1956-06-09 1958-04-09 Hanomag Ag Improvements in rotary engines and compressors
US2866417A (en) * 1956-06-11 1958-12-30 Hanomag Ag Rotary piston machine
GB1098085A (en) * 1964-03-26 1968-01-03 Concentric Engineering Ltd Improvements relating to rotary fluid pumps and motors
GB1155084A (en) * 1965-08-21 1969-06-18 Concentric Engineering Ltd Improvements relating to Rotary Fluid Pumps and Motors
US3619089A (en) * 1970-03-13 1971-11-09 Automatic Radio Mfg Co Fluid-pressure device
DE3633330A1 (de) * 1986-10-01 1988-04-07 Pierburg Gmbh Drehkolbenmaschine
CH682939A5 (de) * 1990-03-09 1993-12-15 Voith Gmbh J M Innenzahnradpumpe.
DE4104397C2 (de) * 1990-03-09 1993-12-16 Voith Gmbh J M Innenzahnradpumpe
DE4140293C2 (de) * 1991-12-06 1994-06-01 Voith Gmbh J M Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen
EP0563661A1 (fr) * 1992-03-19 1993-10-06 J.M. Voith GmbH Pompe à engrenages internes avec des éléments d'étanchéité mobiles radialement pour la compensation radiale
EP0607497B1 (fr) * 1993-01-18 1996-06-12 J.M. Voith GmbH Pompe à engrenages internes avec joint d'étanchéité incorporé dans les dents

Also Published As

Publication number Publication date
DK0661454T3 (da) 1999-09-13
JPH07197887A (ja) 1995-08-01
EP0661454A1 (fr) 1995-07-05
DE59407738D1 (de) 1999-03-11
ATE176301T1 (de) 1999-02-15
ES2129564T3 (es) 1999-06-16
US5540573A (en) 1996-07-30

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