WO2012136398A2 - Pompe à engrenages à denture intérieure - Google Patents

Pompe à engrenages à denture intérieure Download PDF

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Publication number
WO2012136398A2
WO2012136398A2 PCT/EP2012/052014 EP2012052014W WO2012136398A2 WO 2012136398 A2 WO2012136398 A2 WO 2012136398A2 EP 2012052014 W EP2012052014 W EP 2012052014W WO 2012136398 A2 WO2012136398 A2 WO 2012136398A2
Authority
WO
WIPO (PCT)
Prior art keywords
internal gear
separator
gear pump
pinion
pressure
Prior art date
Application number
PCT/EP2012/052014
Other languages
German (de)
English (en)
Other versions
WO2012136398A3 (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 WO2012136398A2 publication Critical patent/WO2012136398A2/fr
Publication of WO2012136398A3 publication Critical patent/WO2012136398A3/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
    • F04C15/0023—Axial sealings for working fluid
    • F04C15/0026—Elements specially adapted for sealing of the lateral faces of 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
    • F04C2/086—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
    • 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 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.
  • axial sealing of the pump chamber at the end faces of the ring gear and the pinion Axialusionn are known, which are normally plate-shaped body, which are pressurized on their the ring gear and the pinion facing away from the outer sides and thus facing the ring gear and the pinion inner sides inside, d. H. pressed against the end faces of the ring gear and the pinion.
  • Such axial discs are also referred to as printing plates.
  • the external pressurization normally occurs within a localized area, the so-called pressure field, which communicates with the pressure area of the pump room or the pump outlet. This means that the pressure in the pressure field is the same as in the pressure range and in the pump outlet.
  • the seal on the end faces of the ring gear and the pinion does not have to be hermetically sealed, but leakage can occur. It is an optimization between a good lubrication and low friction of the ring gear and the pinion on the inner sides of the axial discs on the one hand and a low leakage loss on the other hand strive.
  • a height of a pressing force of the axial discs against the end faces of the ring gear and the pinion is determined by the size of the pressure fields.
  • the shape and arrangement of the pressure fields with respect to the pump chamber and the separator are important for the seal.
  • the pressure fields are formed in the outer sides of the axial discs and / or in zugewanden inner sides of end walls of a pump housing.
  • the internal gear pump according to the invention with the features of claim 1 has an axial disc on an end face of the ring gear and the pinion on which a fixation for the separator of the internal gear pump is made by local forming, which holds the separator in the circumferential direction.
  • the invention allows in a simple and inexpensive way a fixation of the separator in the circumferential direction.
  • the Axialrange can be in the circumferential direction for 360 ° or only one
  • the axial disc covers the area of the separator, possibly even only a part of the separator, wherein it covers radially outwardly and / or inwardly the interdental spaces of the ring gear and / or the pinion over tooth roots away to the interdental spaces, at least in the region of the separator at the end faces of Ring gear and / or pinion to close and seal.
  • Claim 2 provides that the fixation holds the separator against movement in the direction of the pressure range of the internal gear pump.
  • the fixation holds the separator against co-movement with the ring gear and the pinion when rotationally driven to operate the internal gear pump, at low pressure in the pressure region of the internal gear pump, d. H. if the pressure in the pressure range is only slightly or not greater than the pressure in the suction area.
  • the separator by the or an additional fixation which is made by local forming of the axial disc, or as usual by a stop pin, which passes through the pump space across, or by another stop or another investment or the like. Held.
  • Claim 3 provides that the fixation for the separator is made by embossing the A xialusion. It is for example a raised on the inside of the axial disc embossing point, a bead, a nose or the like. Formed holding the separator. Also conceivable is a recessed on the inside of the axial disc embossing, in which a projecting from one side of the separator outwardly molding, a pin or the like. Engages.
  • Claim 5 provides a crimping oil groove produced by local forming on the inside of the axial disk in the region in which the teeth of the ring gear and the pinion mesh again at the end of the pressure range.
  • the squeezing oil groove avoids entrapment of the conveyed liquid in the interdental spaces of the gears, the volume of which penetrates through the tooth of each other gear reduced. An increase in pressure by entering the interdental space of a gear tooth of the other gear is avoided. Such a pressure increase would burden the pivot bearings of the gears and wear.
  • pilot notches made by local forming on the inside of the thrust washer.
  • the pilot control notch is a depression through which interdental spaces of the gears of the internal gear pump in the area of the separator communicate with the pressure region of the pump chamber of the internal gear pump and are pressurized therefrom.
  • the pilot notch 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.
  • This pressure equalization between the tooth spaces of the gears of the internal gear pump and the pressure region of the pump chamber avoids a pressure jump when the interdental spaces reach one end of the separator and open to the pressure region of the pump chamber.
  • a pressure jump would lead to a pressure and volume flow pulsation, which is a cause of noise, increases wear and deteriorates a degree of rotation of an internal gear pump.
  • the preparation of the pilot control notch / s by local forming the inside of the axial disc is inexpensive and suitable for mass production, even for mass production.
  • the pilot control notch must not be in the form of a notch.
  • Claim 7 provides two Axialthroughn on both end sides of the ring gear and the pinion, wherein preferably both axial discs have a fixation for the separator and / or a Quetschölnut. Conceivable, however, are embodiments of the invention in which only one axial disc has the fixation for the separator and / or the Quetschölnut.
  • Claim 8 provides a sheet metal part as Axialusion before, for example, a sheet metal stamping and embossing. This allows a low-cost production and is suitable for mass production and mass production. Short description of the drawing
  • FIG. 1 shows an internal gear pump according to the invention in side view
  • Figure 2 is a view of an axial disc of the internal gear pump of Figure 1 according to the invention.
  • 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 eccentrically arranged 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 Inside of the separator 7 and slide at a nem 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 separating piece 7 encloses liquid volumes in interdental spaces of the toothed wheels 2, 3, so that a rotary drive of the toothed wheels 2, 3 effects a conveyance of liquid from the suction region 8 to the pressure region 9.
  • the separator 7 is supported on a pin 12, which passes through the pump chamber 6 transversely.
  • the sickle-shaped separator 7 is a leg spring.
  • 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 is located on 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 is acted upon outwardly against the tooth tips of the teeth of the ring gear 2 and the inner leg 14 inwardly against the tooth tips of the teeth of the pinion 3.
  • 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 are 13, 14 with a bias to the tooth tips of the teeth of the gears 2, 3, so for example, in unpressurized internal gear pump 1.
  • a leg spring as a separator is not mandatory for the invention.
  • the separator may for example be a solid body or two parts with an outer and an inner part, which are hinged together, may be formed.
  • the internal gear pump 1 has on each end face of its gear wheels 2, 3, an axial pulley 16, one of which is drawn in Figure 2 with a view of the gears 2, 3 facing inside.
  • the axial discs 16 are penetrated by the pump shaft 5 and the pin 12 and thereby held against rotation. They extend in the circumferential direction over more than 180 ° from the suction region 8, which they partly cover, beyond the separator 7 and the pressure region 9.
  • an outlet hole 17 is punched out of the axial discs 16, which is congruent with the outlet bore 11 in the pump housing. se is.
  • the inlet bore 10 opens in the direction of rotation P of the gears 2, 3 seen in front of the axial discs 16 in the suction region 8 of the pump chamber. 6
  • the axial discs 16 On an inner side of the yoke 15 of the separator 7, the axial discs 16 have a fixation 18 for the separator 7.
  • the fixation 18 is an embossing point produced by forming, namely embossing, which is raised on the inside of the axial discs 16.
  • the embossing points 18 of the two axial discs 16, which form the fixation for the separator 7, engage on the inside of the yoke 15 of the separator 7 in the separator 7, they hold the separator 7 in the circumferential direction against a Mitbedorf with the gears 2, 3, when these are driven in rotation.
  • the fixing 18 prevents the separator 7 from moving with the rotating gears 2, 3.
  • Low pressure in the pressure region 9 means a low or absent pressure difference between the pressure region 9 and the suction region 8. If the pressure in the pressure region is significantly higher than in the suction region 8, the pressure difference between the pressure region 9 and the suction region 8 keeps the separator 7 in contact with the pin 12.
  • the axial discs 16 In the region in which the teeth of the gear wheels 2, 3 of the internal gear pump 1 again engage with each other at the end of the pressure region 9, the axial discs 16 have pinch oil grooves 19 on their inner sides facing the toothed wheels 2, 3.
  • the Quetschölnuten 19 are made by local forming, namely by embossing the Axialusionn 16.
  • the axial discs 16 are stamped and stamped parts.
  • the Quetschölnuten 19 communicate the interdental spaces of the gears 2, 3 of the internal gear pump 1 with the pressure range. Containment of conveyed liquid in the interdental spaces, in which the teeth of the respective other gear 3, 2 enter when the gears 2, 3 re-engage with each other, is avoided. Such liquid containment would result in a significant pressure increase associated with excessive bearing load.
  • pilot notches 20 On their insides, the axial discs on two pilot notches 20. These are depressions which, as viewed radially from the outlet hole 17, extend in the amount of the spaces between the teeth of the ring gear 2 and the pinion 3 into a central region of the separator seen in the longitudinal or circumferential direction 7 extend. A depth and cross-sectional area of the pilot notches 20 decreases from the outlet hole 17 to the central portion of the separator 7 where the pilot notches 20 leak.
  • the pilot control notches 20 have a triangular cross-section, which, however, is not mandatory for the invention.
  • pilot notches 20 communicate the interdental spaces of the gears 2, 3 of the internal gear pump 1 with the pressure region 9 of the internal gear pump 1, wherein the pilot notches 20 act as throttles, so that a pressure in the interdental spaces of the gears 2, 3 increases to the pressure in the pressure region 9 until they reach the pressure area 9. A pressure jump when opening the interdental spaces to the pressure region 9 is avoided.
  • the gears 2, 3 facing away outer sides of the axial discs 16 are pressurized.
  • the internal gear pump known per se, so-called. Pressure fields. These are depressions on the axial disks 16 facing inner sides of end walls of the pump housing not shown here, which extend in the circumferential direction substantially as I said over the region of the separator 7 and radially outwardly and inwardly to the area of the interdental spaces of the teeth the gears 2, 3, possibly even in the range of tooth reasons or something over it.
  • the one pressure field on one side of the internal gear pump 1 is covered in Figure 1 by the axial disc 16, the other pressure field is located in front of the plane, so the pressure fields are not visible.
  • Such pressure fields are known from internal gear pumps having axial discs. The pressure fields communicate with the pressure region 9, so that in them the pressure of the pump outlet prevails, which acts on the outer sides of the axial discs 16 in the region of the pressure fields.
  • the internal gear pump 1 is provided as a hydraulic pump of a hydraulic, slip-controlled and / or external power vehicle brake system.
  • hydraulic pumps are also referred to as suction return pumps.

Abstract

Pompe à engrenages à denture intérieure (1) pourvue de disques axiaux (16) pour l'étanchéification latérale et d'un élément de séparation (7) séparant une zone d'aspiration (8) d'une zone de pression (9) dans une cavité de pompe (6) et désigné également par le terme de faucille. L'objet de l'invention est d'empêcher l'élément de séparation (7) de tourner avec les roues dentées (2, 3) de la pompe à engrenages à denture intérieure (1), en cas de contre-pression basse ou inexistante dans la zone de pression (9). A cet effet, une fixation (18) par des points d'estampage est formée sur les disques axiaux (16) et retient l'élément de séparation (7).
PCT/EP2012/052014 2011-04-06 2012-02-07 Pompe à engrenages à denture intérieure WO2012136398A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011006842.2 2011-04-06
DE102011006842A DE102011006842A1 (de) 2011-04-06 2011-04-06 Innenzahnradpumpe

Publications (2)

Publication Number Publication Date
WO2012136398A2 true WO2012136398A2 (fr) 2012-10-11
WO2012136398A3 WO2012136398A3 (fr) 2013-07-18

Family

ID=45563050

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/052014 WO2012136398A2 (fr) 2011-04-06 2012-02-07 Pompe à engrenages à denture intérieure

Country Status (2)

Country Link
DE (1) DE102011006842A1 (fr)
WO (1) WO2012136398A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140178236A1 (en) * 2012-12-25 2014-06-26 Denso Corporation Rotary pump and brake device having the same

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
DE1553015B2 (de) * 1963-04-11 1977-04-21 Eckerle, Otto, 7502 Maisch Verschleissausgleichende, innenachsige zahnradpumpe
DE2916666A1 (de) * 1979-04-25 1980-10-30 Ford Werke Ag Schmieroelpumpe fuer brennkraftmaschinen
DE29624460U1 (de) * 1996-04-06 2003-12-24 Bosch Rexroth Ag Innenzahnradmaschine (Pumpe oder Motor)
US6089841A (en) * 1998-06-26 2000-07-18 General Motors Corporation Crescent gear pump
DE19930911C1 (de) * 1999-07-06 2000-07-20 Voith Turbo Kg Axialkompensation einer Innenzahnradpumpe für den geschlossenen Kreislauf
DE10211865A1 (de) * 2001-03-19 2002-09-26 Luk Lamellen & Kupplungsbau Verdrängungsmaschine
DE102007049704B4 (de) * 2007-10-17 2019-01-31 Robert Bosch Gmbh Innenzahnradpumpe für eine Bremsanlage
DE102010064130A1 (de) * 2010-12-23 2012-06-28 Robert Bosch Gmbh Axialscheibe und Zahnradpumpe mit Axialscheibe

Non-Patent Citations (1)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140178236A1 (en) * 2012-12-25 2014-06-26 Denso Corporation Rotary pump and brake device having the same
CN103899533A (zh) * 2012-12-25 2014-07-02 株式会社电装 旋转泵和具有旋转泵的制动装置

Also Published As

Publication number Publication date
WO2012136398A3 (fr) 2013-07-18
DE102011006842A1 (de) 2012-10-11

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