EP2831420A1 - Pompe à engrenages intérieurs - Google Patents

Pompe à engrenages intérieurs

Info

Publication number
EP2831420A1
EP2831420A1 EP13704919.3A EP13704919A EP2831420A1 EP 2831420 A1 EP2831420 A1 EP 2831420A1 EP 13704919 A EP13704919 A EP 13704919A EP 2831420 A1 EP2831420 A1 EP 2831420A1
Authority
EP
European Patent Office
Prior art keywords
gear pump
internal gear
separator
segments
teeth
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.)
Withdrawn
Application number
EP13704919.3A
Other languages
German (de)
English (en)
Inventor
Andreas PLISCH
Romuald FLAVIGNIE
Rene Schepp
Andreas Klein
Norbert Alaze
Axel PROBST
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.)
Robert Bosch GmbH
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 EP2831420A1 publication Critical patent/EP2831420A1/fr
Withdrawn legal-status Critical Current

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

Definitions

  • the invention relates to an internal gear pump having the features of the preamble of claim 1.
  • the internal gear pump is provided in particular as a hydropump, for example as a so-called return pump, a hydraulic, a slip control and / or an external motor vehicle brake system.
  • the patent DE 196 13 833 B4 discloses an internal gear pump with a ring gear and an axis-parallel pinion, which is arranged eccentrically in the ring gear, that it meshes with the ring gear in a circumferential section.
  • the pinion is non-rotatably mounted on a pump shaft, via which it is driven and drives the ring gear meshing with it.
  • the pinion is an externally toothed gear and the ring gear is an internally toothed gear, the pinion and the ring gear can also be considered as gears of the internal gear pump.
  • the designation as a pinion and as a ring gear has been chosen to distinguish the two gears.
  • a sickle-shaped pump space between them, in which a sickle-shaped or half-sickle-shaped separator is arranged, which divides the pump space into a suction side and a pressure side.
  • the separator is inside and outside a circular arc and is located on tooth heads of
  • Teeth of the ring gear and the pinion to include with the internal gear pump to be delivered hydraulic fluid in interdental spaces.
  • the separator of the known internal gear pump has radially inwardly a sickle-shaped segment carrier and radially outwardly a sickle-shaped segment which are pressed apart by leaf springs:
  • the segment carrier is turned inwards against the tooth tips of the teeth of the pinion and the segment outwards against the Tooth tips of the teeth of the ring gear pressed.
  • a gap between the segment carrier and the segment is acted upon by hydraulic fluid, so that when conveying a hydraulic pressure pushes the segment carrier in addition to the leaf springs inward and the segment to the outside.
  • the segment carrier and the segment are rigid components that do not spring in themselves.
  • the published patent application DE 1 653 818 discloses an internal gear pump with a crescent-shaped, one-piece separator which has an arcuate longitudinal slot dividing the separator into an inner and an outer leg.
  • the slot is open at a pressure-side end of the separator and terminates at a distance in front of a suction-side end of the separator, so that the legs of the separator on the suction side of the internal gear pump are massively connected. Due to a bending elasticity, the legs can spring in the radial direction, the massive connection of the legs at the suction end prevents there a radial movement of the legs of the separator.
  • a hydraulic pressure of conveyed hydraulic fluid in the slot between the legs of the separator urges the legs radially apart and against the tooth tips of teeth of a ring gear and a pinion.
  • the legs of the separator are without preload on the tooth tips.
  • a helical compression spring can be arranged between free ends of the segments. The legs are thereby pressed in the region of their free ends against the tooth tips of the teeth of the pinion and the ring gear. Disclosure of the invention
  • the separator of the internal gear pump according to the invention with the features of claim 1 is an integral part having an inner segment which abuts tooth tips of teeth of a pinion of the internal gear pump, and with an outer segment which on tooth tips of teeth of a ring gear of
  • the separator of the interior of the invention Gear pump has a radial spring element which is an integral part of the separator and which springs in the radial direction to the internal gear pump.
  • the radial spring element connects the two segments of the separator integrally with each other.
  • the invention enables a one-piece separator, the segments (also) at the point where they are integrally connected to each other via the radial spring element, for engagement with the tooth tips of the teeth of the gears of the internal gear pump are radially movable.
  • the separator is simple and inexpensive to produce because of its one-piece, it does not have several
  • Parts can be assembled and can be easily mounted in the internal gear pump because of its one-piece.
  • the segments of the separator of the internal gear pump according to the invention with bias to the tooth tips of the teeth of the gears of the internal gear pump being a system with bias voltage over an entire length of the segments in the circumferential direction of the
  • Gear pump or a contact with the tooth heads also or in particular at the points where they are integrally connected by the radial spring element allows (claim 3).
  • the application of the segments with bias to the tooth tips of the teeth of the gears of the internal gear pump improves a sealing of the interdental spaces between the teeth of the teeth
  • a preferred embodiment of the invention according to claim 7 provides that the separator has a holding forceps, which surrounds a separator holder of the internal gear pump and holds the separator, in particular in the circumferential direction.
  • the holding forceps is preferably integral with the separator.
  • the separator holder is usually a bolt which passes through a pump chamber of the réelle leopard- wheel pump transversely, ie axially parallel. Most of the separator holder is arranged on the suction side of the separator, so that a pressurization acted on the pressure side of the separator against the Trenn Norwegianhalter.
  • the holding forceps according to the invention holds the separator in the opposite direction, for example, in a non-pressurized internal gear pump.
  • the internal gear pump according to the invention is provided as a hydraulic pump of a hydraulic motor vehicle brake system (claim 8). It serves as a so-called. Return pump to a slip control and / or to a hydraulic pressure generation in a foreign-power vehicle brake system.
  • Figure 1 is an internal gear pump according to the invention in side view
  • Figure 2 shows a separator of the internal gear pump of Figure 1 in side view
  • internal gear pump 1 has a ring gear 2 and a pinion 3, which is arranged axially parallel and eccentrically in the ring gear 2, so that it meshes with the ring gear 2 on a peripheral portion.
  • the ring gear 2 is an internally toothed gear
  • the pinion 3 an externally toothed gear
  • the ring gear 2 and the pinion 3 can also be considered as gears 2, 3 of the internal gear pump 1.
  • the pinion 3 is rotatably mounted on a pump shaft 4 and drives the meshing with him ring gear 2 at.
  • a sickle-shaped pump chamber 5 between them, in which a sickle-shaped separator 6 is arranged, which divides the pump chamber 5 into a suction side 7 and a pressure side 8.
  • suction side 7 opens axially parallel an inlet bore 9
  • pressure side 8 also opens axially parallel an outlet bore 10.
  • the ring gear 2 is rotatably mounted in a bearing ring 1 1, which is pressed into a pump housing, not shown.
  • a separator holder 12 is arranged, where the separator 6 is supported in the circumferential direction.
  • the separator holder 12 is a bolt-shaped component which passes through the pump chamber 5 parallel to the axis. It has a flattening 13 on the side on which the separator 6 is located and on which the separator 6 is supported.
  • the separator 6 is a one-piece, crescent-shaped component made of, for example, metal or possibly of plastic. It has a circular-arc-shaped inner segment 14 and also a circular arc-shaped outer segment 15, the pump teeth of teeth 16, 17 of the gears 2, 3 of the réelle leopardrad- 1 and thereby hydraulic fluid, in the embodiment brake fluid, in interdental spaces 18, 19 between the Teeth 16, 17 of the gears 2, 3 of the internal gear pump 1 include. In a rotary drive, the internal gear pump 1 thereby promotes hydraulic fluid in a manner known per se, in the exemplary embodiment brake fluid, from the suction side 7 to the pressure side 8.
  • the two segments 14, 15 of the separator 6 are integrally connected to one another by a radial spring element 20 which is resilient in the radial direction of the internal gear pump 1.
  • the radial spring element 20 is an integral part of the separator 6, it is integral with both the inner and with the outer segment 14, 15 of the separator 6.
  • the radial spring element 20 is a once acute angled leaf spring whose legs 21st at an acute angle to each other. Other shapes and designs of the radial spring element 20 are conceivable.
  • the radial spring element 20 forces the segments 14, 15 apart with a bias, i.
  • the radial spring element 20 presses the segments 14, 15 with a bias against the tooth heads of the teeth 16, 17 of the gears 2, 3 of the internal gear pump 1.
  • the segments 14, 15 of the separator 6 are also at unpressurized internal gear pump 1 and at low delivery and Counterpressure sealing to the tooth tips of the teeth 16, 17 of the gears 2, 3 of the internal gear pump 1 at.
  • the separator 6 On the pressure side 8, the separator 6 is open, so that a gap 22 between the segments 14, 15 of the separator 6 is acted upon by hydraulic fluid from the pressure side 8. If the hydraulic fluid on the pressure side 8 during operation of the internal gear pump 1 under pressure, it presses the inner Segment 14 of the separator 6 inwardly against the tooth tips of the teeth 16 of the pinion 3 and the outer segment 15 against the tooth tips of the teeth 17 of the ring gear 2, so that even with pressure, the interdental spaces 18, 19 between the teeth 16, 17 of the gears. 2 , 3 of the internal gear pump 1 are sealed.
  • the circular-arc-shaped segments 14, 15 of the separator 6 are flexurally elastic, they can be regarded as arcuate leaf springs which spring over their entire length in the radial direction to the internal gear pump 1.
  • the jaws 23 In the direction of the suction side 7, the separator 6 extensions of the segments 14, 15, the jaws 23 form a holding forceps 24, which engage around the arcuate Trenn Norwegianhalter 12.
  • the jaws 23 are curved according to a circumference of the separator holder 12, the jaws 23 and thus the holding forceps 24 are integral parts of the separator 6.
  • the holding forceps 24 holds the separator 6 in the circumferential direction against movement in the direction of the pressure side 8, i. against a Mitbessel with the rotating gears 2, 3. This is particularly necessary for pressureless internal gear pump 1 or at low counter or delivery pressure. At a sufficiently high hydraulic pressure on the pressure side 8, the hydraulic pressure keeps the separator 6 in abutment with the flattening 13 of the separator holder 12.
  • the internal gear pump 1 is provided as a hydraulic pump of a hydraulic motor vehicle brake system, not shown, where it serves as a so-called return pump to slip control systems such as Bremsblockierschutz-, traction and / or vehicle dynamics controls and / or to a brake pressure generation of a foreign vehicle brake system.
  • ABS, ASR, FDR, ESP are commonly used for the mentioned slip regulations
  • driving dynamics regulations are colloquially also referred to as anti-skid regulations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

La présente invention concerne une pompe à engrenages intérieurs (1) destinée à un système de freinage hydraulique de véhicule. Une pièce de séparation (6) en croissant qui sépare un côté aspiration (7) d'un côté refoulement (8) dans une chambre de pompe (5) en croissant de la pompe à engrenages intérieurs (1), présente un segment intérieur (14) en arc de cercle et un segment extérieur (15) en arc de cercle qui sont reliés entre eux sur le côté aspiration par un élément de rappel radial (20) qui comprime les segments (14, 15) contre la tête des dents (16, 17) des roues dentées (2, 3) de la pompe à engrenages intérieurs (1). L'élément de rappel radial (20) est un ressort à lame qui présente un coude formé à angle aigu, ledit ressort à lame étant solidaire des segments (14, 15) et faisant partie intégrante de la pièce de séparation (6).
EP13704919.3A 2012-03-28 2013-02-08 Pompe à engrenages intérieurs Withdrawn EP2831420A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012205007A DE102012205007A1 (de) 2012-03-28 2012-03-28 Innenzahnradpumpe
PCT/EP2013/052535 WO2013143741A1 (fr) 2012-03-28 2013-02-08 Pompe à engrenages intérieurs

Publications (1)

Publication Number Publication Date
EP2831420A1 true EP2831420A1 (fr) 2015-02-04

Family

ID=47739231

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13704919.3A Withdrawn EP2831420A1 (fr) 2012-03-28 2013-02-08 Pompe à engrenages intérieurs

Country Status (5)

Country Link
EP (1) EP2831420A1 (fr)
JP (1) JP5989954B2 (fr)
CN (1) CN104204526B (fr)
DE (1) DE102012205007A1 (fr)
WO (1) WO2013143741A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1653818A1 (de) 1967-02-28 1971-06-09 Daimler Benz Ag Innenverzahnte Zahnradpumpe,insbesondere fuer die Druckmittelversorgung von selbsttaetig schaltenden Kraftfahrzeuggetrieben
JPS51133804A (en) * 1975-05-14 1976-11-19 Tokico Ltd Liquid pressure apparatu s of inscribing wheels
DE2641278A1 (de) * 1976-09-14 1978-03-16 Voith Getriebe Kg Innenzahnradpumpe
DE19613833B4 (de) 1996-04-06 2004-12-09 Bosch Rexroth Ag Innenzahnradmaschine, insbesondere Innenzahnradpumpe
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
DE102009047643A1 (de) * 2009-12-08 2011-06-09 Robert Bosch Gmbh Innenzahnradpumpen für eine hydraulische Fahrzeugbremsanlage

Also Published As

Publication number Publication date
CN104204526B (zh) 2017-03-15
WO2013143741A1 (fr) 2013-10-03
JP2015511681A (ja) 2015-04-20
JP5989954B2 (ja) 2016-09-07
CN104204526A (zh) 2014-12-10
DE102012205007A1 (de) 2013-10-02

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