WO2012089436A2 - Pompe à engrenage intérieur - Google Patents

Pompe à engrenage intérieur Download PDF

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Publication number
WO2012089436A2
WO2012089436A2 PCT/EP2011/071390 EP2011071390W WO2012089436A2 WO 2012089436 A2 WO2012089436 A2 WO 2012089436A2 EP 2011071390 W EP2011071390 W EP 2011071390W WO 2012089436 A2 WO2012089436 A2 WO 2012089436A2
Authority
WO
WIPO (PCT)
Prior art keywords
internal gear
pump
gear pump
pressure
separator
Prior art date
Application number
PCT/EP2011/071390
Other languages
German (de)
English (en)
Other versions
WO2012089436A3 (fr
Inventor
Rene Schepp
Reiner Knoell
Norbert Alaze
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2012089436A2 publication Critical patent/WO2012089436A2/fr
Publication of WO2012089436A3 publication Critical patent/WO2012089436A3/fr

Links

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
    • F04C2/101—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 with a crescent-shaped filler element, located between the inner and outer intermeshing members
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
    • F04C15/0049—Equalization of pressure pulses
    • 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
    • F04C2/086—Carter
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/12—Vibration

Definitions

  • the invention relates to an internal gear pump having the features of the preamble of claim 1.
  • Internal gear pumps are known. They have a ring gear, d. H. an internally toothed gear, and an eccentrically arranged in the ring gear, externally toothed gear, which will be referred to as pinion hereinafter, on.
  • the ring gear and the pinion which may also be referred to as gears of the internal gear pump, mesh with each other on a peripheral portion.
  • a separator is arranged, which is also referred to as a sickle or sickle piece due to its usual, adapted to the shape of the pump chamber shape.
  • the separator separates a suction area from a pressure area of the pump space of the internal gear pump, wherein the suction area communicates with a pump inlet and the pressure area with a pump outlet and can also be considered as (part of) the inlet and outlet of the internal gear pump.
  • Tooth tips of teeth of the ring gear and the pinion are outside or inside of the separator and slide during operation of the internal gear pump, so long with driven pinion and ring gear, outside and inside of the separator along.
  • the separator includes fluid volumes in interdental spaces of the ring gear and the pinion, so that the gears in a rotary drive, so at Operation of the internal gear pump, conveying fluid from the suction area to the pressure area of the pump chamber of the internal gear pump.
  • the separator of the internal gear pump according to the invention with the features of claim 1 has a pilot channel, communicate through the interdental spaces of the ring gear or the pinion with the pressure range of the pump chamber of the internal gear pump.
  • the inventive internal gear pump has both for the ring gear and for the
  • Pinion one, u. U. also several, pilot channels on.
  • the pilot duct does not reach to and communicates with the suction area of the pump chamber of the internal gear pump.
  • the pilot channel Through the pilot channel the interdental spaces of the gears of the internal gear pump are pressurized.
  • the pilot channel is formed so that it acts as a throttle, so that a pressure in the interdental spaces in the conveying direction, d. H. in the direction of the pressure range, increases until it reaches the pressure of the pressure range of the internal gear pump.
  • the invention achieves a pressure equalization between the interdental spaces of the gears of the internal gear pump and the pressure range of the pump chamber while the interdental spaces are in the region of the separator before or until the interdental spaces reach the pressure range side end of the separator by the rotary drive of the gears and the pressure range of the separator Open the pump room.
  • a sudden pressure equalization when opening the interdental spaces to the pressure area is avoided.
  • Such a pressure jump with each opening of a tooth gap to the pressure region of the pump chamber of the internal gear pump when operating the internal gear pump, d. H. with a rotary drive of their gears would lead to a pressure and flow pulsation, which is the cause of a noise, increases wear and deteriorates efficiency of réelle leopard- wheel pump.
  • the preparation of the pilot channel / the pilot channels on the separator is inexpensive and is suitable for mass production, even for mass production.
  • Figure 1 shows an internal gear pump according to the invention without pump housing in side view
  • internal gear pump 1 has two gears 2, 3, namely an internally toothed ring gear 2 and an externally toothed gear, which is referred to here as pinion 3.
  • the pinion 3 is arranged eccentrically in the ring gear 2, the two gears 2, 3 have mutually parallel axes and mesh with each other.
  • the ring gear 2 is rotatably mounted slidably in a bearing ring 4, the pinion 3 is rotatably mounted on a pump shaft 5.
  • the pump shaft 5 is driven in rotation, with it rotates on the pump shaft 5 rotatably fixed pinion 3 and drives the intermeshing ring 2 rotating.
  • One direction of rotation is indicated by the arrows P.
  • the gears 2, 3 define a sickle-shaped pump chamber 6 in a peripheral portion in which they do not mesh with each other, between them.
  • a sickle-shaped separator 7 is arranged, which can also be understood as a semi-or semi-sickle-shaped and is often referred to as a sickle or sickle body due to its shape.
  • the separator 7 separates a suction region 8 from a pressure region 9 of the pump chamber 6.
  • Teeth heads of the gears 2, 3 of the internal gear pump 1 are located on an outer or inner side of the separator 7 and slide at a rotary drive of the gears 2, 3 along the outside or inside of the separator 7 along.
  • the separator 7 is the same width as the gears 2, 3, both of which have the same width.
  • the separator 7 includes fluid volumes in interdental spaces of the gears 2, 3, so that a rotary drive of the gears 2, 3 causes a promotion of liquid from the suction area 8 to the pressure area 9.
  • the separator 7 is supported on a pin 12, which passes through the pump chamber 6 transversely.
  • the crescent-shaped separator 7 is a leg spring, which is shown in Figures 2a, 2b as a single part.
  • the leg spring is a U-shaped bent leaf spring with two circular arc-shaped legs 13, 14, where as already said the tooth tips of the teeth of the gears 2, 3 abut.
  • a yoke 15 connects the two legs 13, 14 and abuts the pin 12.
  • the leg spring forming the separator 7 is open at its pressure-range-side end, so that an interior space 21 between the legs 13, 14 of the leg spring is subjected to the pressure prevailing in the pressure region 9, which separates the legs 13, 14, d. H. the outer leg 13 outwardly against the tooth tips of the teeth of the ring gear 2 and the inner leg 14 inwardly against the
  • the legs 13, 14 of the leg spring, which forms the separator 7 of the internal gear pump 1 even in changing pressure conditions always sealingly against the tooth tips of the teeth of the gears 2, 3 of the internal gear pump 1.
  • the legs 13, 14 bear against the tooth tips of the teeth of the gearwheels 2, 3 with a pretension, that is to say, for example, also in the case of an unpressurized internal gear pump 1.
  • this has the shape of a leg spring Separator 7 each have a pilot channel 16 ( Figures 2a, 2b).
  • the pilot control channels 16 are designed as channel-shaped depressions in the embodiment triangular cross-section.
  • the pilot control channels 16 are at the pressure-side ends of the legs 13,
  • pilot channels 16 communicate with the The pilot channels 16 extend a piece more or less long piece in the circumferential direction, in the illustrated embodiment of the invention, the pilot channel 16 extends on the inside of the separator 7 in the circumferential direction over about one half of the length of the separator 7 and A cross-section of the pilot control channels 16 decreases from the pressure-side ends in the circumferential direction against the direction of rotation P of the gears 2, 3, that is counter to the conveying direction, to zero, so that the pilot control channels 16 run out in the course of the outer and the inner side of the separator 7, ie end as described.
  • pilot control channels 16 communicate the interdental spaces of the teeth of the gears 2, 3 of the internal gear pump 1 with the pressure region 9 of the pump chamber 6. With the tooth tips of the teeth of the gears 2, 3, which bear against the outside or inside of the separator 7 form the pilot control channels
  • the pilot control channels 16 control a pressure difference between the inner space 21 of the separator 7 and the interdental spaces of the teeth of the gears 2, 3.
  • the pilot control channels 6 control a pressure difference between the inner and outer sides of the legs 13, 14 of the leg spring trained separator 7 and thus ensure even with changing pressure conditions, ie changing pressures in the suction area 8 and / or in the pressure range 9 for a defined system of legs 13, 14 of the separator 7 at the tooth tips of the teeth of the gears 2, 3rd It will a good compromise between good sealing action between the teeth of the gears 2, 3 and the separator 7 and low friction, which drives a moment of the internal gear pump 1 and wear of the separator 7 and the tooth tips of the teeth of the gears 2, 3 influenced achieved.
  • the pilot control channels 16 according to the invention can also be provided in the outside and inside of a solid separating piece 17, as shown in FIGS. 3a, 3b.
  • the separator 17 may be arranged in the pump chamber 6 of the internal gear pump 1 of Figure 1 instead of the separator 7 forming leg spring of Figures 2a, 2b.
  • the statements relating to FIGS. 1, 2a, 2b are additionally referred to.
  • Figures 4a, 4b show a multi-part separator 18 with a cylindrical shell-shaped outer part 19 and a cylindrical shell-shaped inner part 20.
  • the outer and inner part 19, 20 are hinged together.
  • the outer and inner parts 19, 20 are open, so that an inner space 21 between the two parts 19, 20 of the separator 18 communicates with the pressure region 9 of the internal gear pump 1.
  • the separator 7 shown in Figs. 1, 2a, 2b by the separator 18 of Figs.
  • the outer member 19 is directed outwardly and the inner member 20 in abutment against the teeth of the teeth of the teeth Hohlrads 2 and the pinion 3 pressed.
  • a leg spring 22 is arranged, which apart the parts 19, 20 regardless of a pressurization, d. H. the outer part 19 presses outwardly against the tooth tips of the ring gear 2 and the inner part 20 inwardly against the tooth tips of the pinion 3.
  • the outer part 19 has in its outer side and the inner part 20 in its inner side a pilot channel 16, as have been described to Figures 1, 2a, 2b, which are hereby incorporated by reference.
  • the internal gear pump 1 is provided as a hydraulic pump of a hydraulic, slip-controlled and / or external power vehicle brake system. Such hydraulic pumps are also referred to as recirculation pumps, although not necessarily true.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

L'invention concerne une pompe à engrenage intérieur comportant une pièce de séparation en forme de croissant (7) qui sépare, dans une chambre de la pompe en forme de croissant entre une couronne et un pignon de la pompe à engrenage intérieur, une zone d'aspiration (8) d'une zone de pression (9). Selon l'invention, dans les faces extérieure et intérieure de la pièce de séparation (7) sont agencés des conduits de commande pilotes (16) dont l'extrémité est ouverte côté zone de pression, c'est-à-dire qu'ils communiquent avec la zone de pression, et qui s'amincissent et se terminent dans une direction opposée à la direction de refoulement de la pompe à engrenage intérieur. Les conduits de commande pilotes (16) provoquent une hausse continue de pression dans les entre-dents de la couronne et du pignon de la zone d'aspiration (8) vers la zone de pression (9) et évitent une hausse brutale de pression à l'extrémité côté zone de pression de la pièce de séparation (7).
PCT/EP2011/071390 2010-12-27 2011-11-30 Pompe à engrenage intérieur WO2012089436A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010064193 DE102010064193A1 (de) 2010-12-27 2010-12-27 Innenzahnradpumpe
DE102010064193.6 2010-12-27

Publications (2)

Publication Number Publication Date
WO2012089436A2 true WO2012089436A2 (fr) 2012-07-05
WO2012089436A3 WO2012089436A3 (fr) 2013-06-20

Family

ID=45349468

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/071390 WO2012089436A2 (fr) 2010-12-27 2011-11-30 Pompe à engrenage intérieur

Country Status (2)

Country Link
DE (1) DE102010064193A1 (fr)
WO (1) WO2012089436A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012213775A1 (de) 2012-08-03 2014-02-06 Robert Bosch Gmbh Innenzahnradpumpe

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB967944A (en) * 1962-04-06 1964-08-26 Daimler Benz Ag Improvements relating to gear pumps
DE1553014A1 (de) * 1963-03-04 1969-08-21 Otto Eckerle Einrichtung an Pumpen zur Verminderung der Geraeuschentwicklung
DE10334954A1 (de) * 2003-07-31 2005-02-24 Voith Turbo Gmbh & Co. Kg Hydropumpe
DE102007049704B4 (de) * 2007-10-17 2019-01-31 Robert Bosch Gmbh Innenzahnradpumpe für eine Bremsanlage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
DE102010064193A1 (de) 2012-06-28
WO2012089436A3 (fr) 2013-06-20

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