EP0293585B1 - Machine réversible à engrenages (pompe ou moteur) - Google Patents

Machine réversible à engrenages (pompe ou moteur) Download PDF

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Publication number
EP0293585B1
EP0293585B1 EP19880106171 EP88106171A EP0293585B1 EP 0293585 B1 EP0293585 B1 EP 0293585B1 EP 19880106171 EP19880106171 EP 19880106171 EP 88106171 A EP88106171 A EP 88106171A EP 0293585 B1 EP0293585 B1 EP 0293585B1
Authority
EP
European Patent Office
Prior art keywords
pressure
bores
sealing
rings
machine
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
EP19880106171
Other languages
German (de)
English (en)
Other versions
EP0293585A1 (fr
Inventor
Hayno Dipl.-Ing. Rustige
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 EP0293585A1 publication Critical patent/EP0293585A1/fr
Application granted granted Critical
Publication of EP0293585B1 publication Critical patent/EP0293585B1/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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/06—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
    • 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
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • F05C2225/04—PTFE [PolyTetraFluorEthylene]

Definitions

  • the invention relates to a gear machine according to the preamble of the main claim.
  • a gear machine has become known from DD-B 157 874.
  • this known machine there are two control valves in connection channels from the high or low pressure side to the pressure fields and to a leakage oil chamber, which have the task of the pressure fields with the high pressure side and to connect a leakage oil duct to the low pressure side.
  • Such a gear machine has the disadvantage that it requires two control valves, which requires a considerable installation space and also causes high costs.
  • a gear machine has also become known from DE-A 2 403 319, which shows similar pressure fields and which is also suitable for so-called reversing operation, i.e. Operation in both directions of rotation is suitable.
  • this machine there is at least one seal to delimit them on each side of the gearwheels between the pressure spaces of the pressure fields and the bearing bodies, the seals being designed so that they have a U-shaped cross section, with the base side facing the sealing plate, and that a support body is provided within this seal.
  • Such a machine has the disadvantage that the pressure fields cannot be applied arbitrarily, but are tied to the pressure conditions in the machine.
  • the gear machine according to the invention with the characterizing features of the main claim has the advantage that the application of at least two pressure fields can be controlled by only one valve, as a result of which the operating behavior of the machine is very adaptable and the design effort is kept within reasonable limits.
  • FIG. 1 shows a longitudinal section through a gear motor, in FIG. 2 a cross section along II-II according to FIG. 1, FIG. 3 a cross section along III-III according to FIG. 2, FIG. 4 a detail.
  • the gear motor has a housing 10, the interior 11 of which is closed by two covers 12, 13. In the interior, two gears 14, 15 mesh with each other in external engagement, the shafts 16, 17 of which are mounted in bush-shaped or spectacle-shaped bearing bodies 18, 19, which are slightly axially and radially displaceable in the housing.
  • the shaft 17 has an extension 23 which penetrates to the outside through a bore in the cover 13 and is sealed there by a sealing ring 24.
  • a sealing plate 26 is arranged between the bearing body 18 and the gearwheel side surfaces, on the side facing away from the gearwheels pressure fields are formed, as are clearly shown in particular in FIG. 2.
  • the pressure fields AD are delimited by a seal 27, which is arranged in a suitable groove in the end face of the bearing body 18.
  • the seal consists of two concentrically extending, approximately glasses-shaped rings 28, 29, the inner rings 29 being connected to one another by a web 30 which runs in the imaginary axial direction of the center of the gear shaft.
  • the inner and outer rings are also connected to each other by webs 31, 32 which extend approximately radially outward from the inner rings, approximately at right angles to the web 30, their axial direction also referring to the center of the gear shaft.
  • the diameter of the outer rings 28 extends to the edge of the interior 11 or to the edge of the sealing plate 26, while the inner rings 29 are at a short distance from the shaft bores.
  • a bore 40, 41 also penetrates into the external pressure fields C and D, which likewise penetrate through the sealing plate and are connected to bores 42, 44 or 43, 45 in the bearing body 18 or cover 12, which run in the same axis. There they have connections to a line 46 to which a pressure valve 47 is connected, advantageously an electromagnetically actuated proportional valve, with which the pressure in the pressure fields C and D is controlled.
  • the bores 40, 41 are designed as throttle bores.
  • the seal 27 is shown in more detail. It is formed in two parts and consists of a support body 27A with a U-shaped cross section, the underside of which rests on the sealing plate 26.
  • the support body consists of a plastic, for example PTFE.
  • a soft, rubber-like seal 27B which has a cross-sectional shape shown in FIG. 3, is inserted into the support body.
  • the seal 27 is arranged in a correspondingly shaped groove 48 in the bearing body 18.
  • the sealing body 27B has two longitudinal grooves 27C, 27D on its part lying on the rounded groove base.
  • a circumferential groove 49 runs around the bearing body at a small distance from the groove 48.
  • the throttle bores 40, 41 ensure that only a small pressure medium flow is branched off from the gear machine.
  • a sealing plate 26 with corresponding pressure fields can also be arranged on the other side of the gear wheel. However, this is not absolutely necessary.
  • the gear machine can be operated both as a hydraulic motor and as a gear pump. It is reversible; if high pressure fluid is supplied to the bore 51, then the field B is pressurized and the field A is pressurized.
  • the groove 49 prevents pressure medium under high pressure from leaking along the outside of the bearing body toward the covers. As a result, the interior of the housing remains largely relieved of pressure.

Landscapes

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

Claims (4)

1. Machine réversible à engrenages (pompe ou moteur) comportant deux pignons (14, 15) engrénant par engrènement extérieur, et comportant une plaque d'étanchéité (26) sur au moins l'une de leurs surfaces latérales, plaque qui est soumise à l'action de champs de pression (A, D) sur sa face autre que celle tournée vers les engrenages, champs de pression qui sont délimités par une forme de joint (27) comprenant deux anneaux (28, 29) concentriques, disposés sensiblement en forme de lunette et qui sont reliés par des entretoises, les anneaux extérieurs étant situés le long de la paroi intérieure de la cavité et les anneaux intérieurs au voisinage des axes des pignons, les deux anneaux intérieurs (29) étant reliés par une première entretoise (30) suivant l'axe géométrique passant par le milieu des axes des pignons et en ce qu'en outre, partant des anneaux intérieurs, on a chaque fois deux entretoises (31, 32) dirigées radialement et de façon sensiblement perpendiculaire à la première entretoise, dans des directions opposées en étant reliées aux anneaux extérieurs donnant deux champs de pression (C, D) diamétralement opposés, qui sont soumis à une pression provenant des mêmes perçages débouchants (40, 41), cette pression étant commandée par un clapet (46) et les deux champs de pression (A, B) qui sont formés entre les entretoises (31, 32) sensiblement radiales et la première entretoise (30), sont reliés par des perçages (34, 35) traversant la plaque d'étanchéité (26) à l'entrée/sortie (50, 51) respective, machine caractérisée en ce que le fluide sous pression qui sollicite les champs de pression (C et D) provient de la chambre de pression de la machine à savoir en passant par les perçages d'étranglement (40, 41) qui sont reliés au clapet (47) par les champs de pression (C, D) et des perçages (43, 45) traversant un couvercle de carter (12), en étant reliés au clapet (47) lui-même relié à un récipient.
2. Machine réversible à engrenages selon la revendication 1, caractérisée en ce que les perçages (40, 41) débouchant dans les champs de pression (C, D) sont des perçages d'étranglement.
3. Machine selon les revendications 1 et 2, caractérisée en ce que le joint est en deux parties et se compose d'un anneau de soutien (27A) en matière synthétique qui est directement appliqué contre la plaque d'étanchéité (26) et un corps d'étanchéité (27B) inséré dans l'anneau de soutien, ce corps étant en un matériau plus souple et en ce que le joint (27) est logé dans une rainure (48) réalisée dans la face frontale du corps de palier.
4. Machine selon l'une des revendications 1 à 3, caractérisée en ce qu'une petite rainure (49), périphérique est prévue à une faible distance du joint (27) à la périphérie extérieure du corps de palier.
EP19880106171 1987-05-30 1988-04-19 Machine réversible à engrenages (pompe ou moteur) Expired - Lifetime EP0293585B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3718229 1987-05-30
DE3718229 1987-05-30

Publications (2)

Publication Number Publication Date
EP0293585A1 EP0293585A1 (fr) 1988-12-07
EP0293585B1 true EP0293585B1 (fr) 1991-06-12

Family

ID=6328748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880106171 Expired - Lifetime EP0293585B1 (fr) 1987-05-30 1988-04-19 Machine réversible à engrenages (pompe ou moteur)

Country Status (2)

Country Link
EP (1) EP0293585B1 (fr)
DE (1) DE3863235D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3902139A1 (de) * 1989-01-25 1990-07-26 Bosch Gmbh Robert Hydrostatischer antrieb
GB2233712A (en) * 1989-07-13 1991-01-16 Dowty Hydraulic Units Ltd Rotary positive displacement hydraulic machines
DE3925269A1 (de) * 1989-07-31 1991-02-07 Vickers Systems Gmbh Axialdichtung
IT1241224B (it) * 1990-05-11 1993-12-29 Maspe Srl Macchina calcolatrice per prodotti alimentari allo stato fluido
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
DE10104621B4 (de) * 2001-02-02 2014-07-24 Robert Bosch Gmbh Axialfeldabdichtung einer Zahnradmaschine
GR1009196B (el) * 2016-08-31 2018-01-11 Αθανασιος Νικολαου Κοτουπας Νεου τυπου συστημα γραναζιων

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3174435A (en) * 1962-08-16 1965-03-23 Clark Equipment Co Pump or motor
US3499390A (en) * 1968-04-11 1970-03-10 Parker Hannifin Corp Rotary pump
DE2403319A1 (de) * 1974-01-24 1975-07-31 Bosch Gmbh Robert Zahnradmaschine
DE3217753A1 (de) * 1982-05-12 1983-11-17 Robert Bosch Gmbh, 7000 Stuttgart Reversierbare zahnradmaschine (pumpe oder motor)

Also Published As

Publication number Publication date
DE3863235D1 (de) 1991-07-18
EP0293585A1 (fr) 1988-12-07

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