EP0062747B1 - Moteur hydraulique à engrenages - Google Patents

Moteur hydraulique à engrenages Download PDF

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Publication number
EP0062747B1
EP0062747B1 EP82101374A EP82101374A EP0062747B1 EP 0062747 B1 EP0062747 B1 EP 0062747B1 EP 82101374 A EP82101374 A EP 82101374A EP 82101374 A EP82101374 A EP 82101374A EP 0062747 B1 EP0062747 B1 EP 0062747B1
Authority
EP
European Patent Office
Prior art keywords
bearing
bearing bodies
pressure
gear
bodies
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
Application number
EP82101374A
Other languages
German (de)
English (en)
Other versions
EP0062747A2 (fr
EP0062747A3 (en
Inventor
Wilhelm Dworak
Karl-Heinz Dipl.-Ing. Müller
Siegfried Mayer
Wolfgang Talmon
Günter Wolff
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 EP0062747A2 publication Critical patent/EP0062747A2/fr
Publication of EP0062747A3 publication Critical patent/EP0062747A3/de
Application granted granted Critical
Publication of EP0062747B1 publication Critical patent/EP0062747B1/fr
Expired 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
    • F04C15/0023—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

Definitions

  • the invention relates to a gear motor according to the preamble of the main claim.
  • a gear motor in addition to the bearing bodies, a pressure plate is provided in the housing, on which pressure fields are built up in cooperation with a seal arranged in the housing cover, which act on the bearing body via the pressure plate and presses it sealingly against the gear side surfaces.
  • Such an arrangement is particularly suitable for a reversible gear motor, since the pressure fields are always applied on the correct side.
  • the arrangement is complex since it requires parts specially designed for a gear motor.
  • the gear motor according to the invention with the characterizing features of the main claim has the advantage that no special parts are necessary to achieve the same purpose, i.e. The parts required for this also occur with gear pumps, which means that inventory can be reduced considerably.
  • FIG. 1 shows a longitudinal section through a gear motor
  • FIG. 2 shows a section along 11-11 according to FIG. 1
  • FIG. 3 shows a section along 111-111 according to FIG. 1
  • FIG. 4 shows a section along IV-IV according to FIG. 1
  • FIG. 5 shows a section along VV of Figure 1 in a somewhat simplified representation.
  • the gear motor has a middle housing part 10, which is closed on both sides by covers 11, 12.
  • the middle part of the housing has a continuous recess 13, the cross section of which has the shape of an eight and in which toothed wheels 14, 15 mesh in external engagement.
  • the shaft journals 16, 17 of the gearwheels facing the cover 11 are mounted in approximately bush-shaped bearing bodies 18, 19. These bearing bodies form the bearing side A.
  • the shaft journals 22, 23 of the gearwheels facing the cover 12 are mounted in the same bearing bodies 24, 25 which form the bearing side B.
  • the shaft journal 23 has an extension 26 which penetrates outwards through a cover bore 27 and forms the output shaft of the gear motor.
  • the seal on the extension 26 is provided by a sealing arrangement 28 in the cover bore 27.
  • the bearing bodies have a slight axial play X in the recess 13 of the middle part of the housing.
  • the two bearing bodies on the respective bearing sides A and B could also be designed as one-piece bearing bodies, namely as so-called glasses.
  • a groove 30 running in one go is formed, which has approximately the shape of a “three”.
  • a seal 31 is arranged, which has the same contour as the groove 30.
  • the "three" - when looking at Figure 3 - is open to the left.
  • a groove 32 is formed in one go, which also has the shape of a “three” and in which a seal 33 is suitably arranged.
  • the "three" - if you look at Figure 4 - is open to the right. It can be seen from this that the seals on the bearing sides A and B are arranged opposite one another.
  • Two holes 35, 36 penetrate into the recess 13 from mutually opposite outer sides of the housing middle part 10 and extend coaxially. They lie at the level of the gearwheels 14, 15. Triangular recesses 37, 38 and 39, 40 are formed between the bearing bodies 18, 19 and 24, 25 and the housing recess 13 over the entire height of the bearing bodies. This creates a connection from the end faces of the bearing bodies facing away from the gearwheel side surfaces to the bores 35, 36.
  • a pressure field D2 can also currently build up in front of the seal 31, i.e. between the recess 37 and the open part of this seal.
  • the pressure field D1 is significantly larger, this axial force P outweighs the force from the pressure field D2, see FIG
  • the pressure field D1 extends more in terms of area on this side, while the opposite sides (D3, D4) are relieved.
  • the pressure field D2 is essentially reduced, the gaps between the gear side surfaces and the bearing bodies lying against them become zero. This enables the gear motor to start safely.
  • the relaxed pressure medium flows through the bore 36 without pressure.
  • the gear motor can also be supplied with pressure medium under high pressure via the bore 36. Then a large pressure field D3 - see now FIG. 3 - builds up between the recess 38 and the back of the seal 31, while a small pressure field D4 builds up on the open part of the seal 33 - see now FIG. 4 - ie between the recess 40 and the open part of this seal. Again, the force P 2 outweighs the large pressure field, but this time from the other side - see Figure 5. The effect is the same again.

Landscapes

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

Claims (4)

1. Moteur à engrenages comportant deux roues dentées (14, 15) s'engrenant en étant en prise extérieurement, et dont les tourillons d'arbres (16, 17; 22, 23) sont montés dans des éléments de paliers (18, 19; 24, 25) très légèrement mobiles en direction axiale dans le carter de la machine à engrenages et sur les faces frontales desquels, situées à l'opposé des roues dentées, sont constitués des champs de pression (D" D3) agissant en direction axiale, limités par des garnitures d'étanchéité et alimentés par le côté haute pression, en vue de presser les éléments de palier contre les surfaces latérales des roues dentées qui ne s'étendent que sur une partie de la surface totale des éléments de paliers, moteur à engrenages caractérisé en ce que les champs de pression (D,, D3) s'étendent essentiellement sur un seul côté d'une ligne droite imaginaire (E) reliant les axes des tourillons d'arbres (16, 17; 22, 23) mais sont rapportés à la face de support considérée (A, B) prévus en sens opposés.
2. Moteur selon la revendication 1, caractérisé en ce que les champs de pression sont formés par des garnitures d'étanchéité (31, 33), qui présentent à peu près la forme d'un «trois» et sont disposées dans des rainures correspondantes (30, 32) des éléments de paliers.
3. Moteur selon la revendication 1 et/ou 2, caractérisé en ce que les éléments de paliers (18, 19; 24, 25) sont constituées sous la forme de coussinets s'appliquant l'un contre l'autre et en ce que deux coussinets sont prévus par face de support.
4. Moteur selon l'une des revendications 1 à 3, caractérisé en ce que celui-ci est constitué de façon à être réversible et en ce que chaque fois un seul champ de pression dominant (D1, D3) est alimenté par le côté haute pression considéré par l'intermédiaire d'un évidement (37, 38; 39, 40) prévu entre le carter et les éléments de paliers.
EP82101374A 1981-04-07 1982-02-24 Moteur hydraulique à engrenages Expired EP0062747B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3113939 1981-04-07
DE19813113939 DE3113939A1 (de) 1981-04-07 1981-04-07 Zahnradmotor

Publications (3)

Publication Number Publication Date
EP0062747A2 EP0062747A2 (fr) 1982-10-20
EP0062747A3 EP0062747A3 (en) 1983-10-12
EP0062747B1 true EP0062747B1 (fr) 1986-01-29

Family

ID=6129530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82101374A Expired EP0062747B1 (fr) 1981-04-07 1982-02-24 Moteur hydraulique à engrenages

Country Status (4)

Country Link
US (1) US4455130A (fr)
EP (1) EP0062747B1 (fr)
JP (1) JPS57181902A (fr)
DE (2) DE3113939A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR1009196B (el) * 2016-08-31 2018-01-11 Αθανασιος Νικολαου Κοτουπας Νεου τυπου συστημα γραναζιων

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996997A (en) * 1960-05-19 1961-08-22 Borg Warner Reversible hydraulic pump or motor
US3213800A (en) * 1965-05-04 1965-10-26 Webster Electric Co Inc Unitary wear plate and seal
US3891360A (en) * 1973-03-06 1975-06-24 Bosch Gmbh Robert Gear machine with axially movable end wall seal
DE2403319A1 (de) * 1974-01-24 1975-07-31 Bosch Gmbh Robert Zahnradmaschine
DE7500496U (de) * 1975-01-10 1976-07-22 Robert Bosch Gmbh, 7000 Stuttgart Ahnradmaschine (pumpe oder motor)
JPS5543220A (en) * 1978-09-19 1980-03-27 Kayaba Ind Co Ltd Terminal structure of seal to demarcate gear pump or high pressure area and low pressure area in motor
US4311444A (en) * 1979-04-19 1982-01-19 Shumate Donald L Pressure-balancing end plate for a reversible gear pump or motor
DD156056A3 (de) * 1980-12-15 1982-07-28 Guenter Leichsenring Hydrostatische zahnradmaschine

Also Published As

Publication number Publication date
DE3113939A1 (de) 1982-11-11
US4455130A (en) 1984-06-19
JPH0138164B2 (fr) 1989-08-11
EP0062747A2 (fr) 1982-10-20
DE3268735D1 (en) 1986-03-13
JPS57181902A (en) 1982-11-09
EP0062747A3 (en) 1983-10-12

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