EP0189560B1 - Machine à engrenage (pompe ou moteur) - Google Patents

Machine à engrenage (pompe ou moteur) Download PDF

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Publication number
EP0189560B1
EP0189560B1 EP85115455A EP85115455A EP0189560B1 EP 0189560 B1 EP0189560 B1 EP 0189560B1 EP 85115455 A EP85115455 A EP 85115455A EP 85115455 A EP85115455 A EP 85115455A EP 0189560 B1 EP0189560 B1 EP 0189560B1
Authority
EP
European Patent Office
Prior art keywords
bushings
pair
cavities
line
gear 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
Application number
EP85115455A
Other languages
German (de)
English (en)
Other versions
EP0189560A1 (fr
Inventor
Rudolf Müller
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 EP0189560A1 publication Critical patent/EP0189560A1/fr
Application granted granted Critical
Publication of EP0189560B1 publication Critical patent/EP0189560B1/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
    • 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

Definitions

  • the invention relates to a gear machine according to the preamble of the main claim.
  • a recess is formed in each socket of a pair of sockets, in such a way that a web remains between two adjacent recesses.
  • the recesses extend up to an imaginary straight line that connects the two bushing centers.
  • the gear machine according to the invention with the characterizing features of the main claim has the advantage that it is not only easy to manufacture, but that the erosion phenomena mentioned are reduced and thus the efficiency of the machine is improved.
  • Figure 1 shows a longitudinal section through a gear pump
  • Figure 2 shows a section along 11-11 of Figure 1
  • Figure 3 shows a detail.
  • the gear pump has a housing 10 with an interior 11, which is sealed by housing covers 12, 13.
  • housing covers 12, 13 In the interior 11 of the housing, two toothed wheels 14, 15 mesh in external engagement, the shaft journals 14a, 14b and 15a, 15b of which are mounted in bearing bushes 16 to 19.
  • a through hole 13a is formed in the cover 13, through which the drive shaft 14c of the drive shaft penetrates to the outside.
  • each bush has a flat side running in its longitudinal direction, with which flat sides the bushes abut one another.
  • the line of engagement E of the gear wheels is also entered in FIG.
  • a tapered groove-shaped recess 24 is formed, which is relatively flat, has a connection to the low pressure bore 21 and extends almost to an imaginary straight line G, which connects the two gear shaft centers.
  • the recess 24 does not touch the parting line 23.
  • a similar recess 25 is formed in the bushing 19, but with the difference that it is obliquely opposite the part 24 with respect to the parting line 23 and is connected to the high-pressure bore 22.
  • FIG. 3 shows a top view of the two pairs of bushings, each from the gear side surface.
  • the lower pair of sockets 16, 18 is shown tilted by 180 °, so that it can now be understood that the recess 26 is connected to the low-pressure bore, the recess 27 to the high-pressure bore. If you place the two pairs of sockets on top of one another, the recesses 24 to 27 do not lie one above the other, but laterally offset from one another. This idea is facilitated by the engagement lines E shown in FIG. 3.
  • the recesses serve to bring pressure medium from grooves 30, 40, which have a triangular cross-section and run in the housing, also from the side to the gearwheels and, in particular, to discharge so-called squeezing oil, ie. H. Oil that forms when the tooth and tooth gap mesh so that excessive pressure is avoided.
  • squeezing oil ie. H. Oil that forms when the tooth and tooth gap mesh so that excessive pressure is avoided.

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

Claims (2)

1. Machine à engrenage (pompe ou moteur) comportant des pignons dentés engrenant de manière périphérique et dont les axes sont logés dans des douilles de palier (16, 19) prévues de chaque côté des pignons dentés dans le carter de la machine à engrenage, douilles qui s'appliquent l'une contre l'autre par les côtés plats formant un joint (23) et dont les faces frontales tournées vers les pignons dentés ont des cavités qui s'étendent du côté basse pression (21) au côté haute pression (22) en direction d'une droite imaginaire (G) qui relie entre elles les deux douilles, machine caractérisée en ce que sur chaque douille de palier (16 à 19) d'une paire de douilles il n'y a qu'une cavité (24-27) et les cavités d'une paire de douilles sont en regard de manière inclinée par rapport à la ligne d'attaque (E) et ne touchent pas celle-ci et en ce que les cavités de l'autre paire de douilles sont décalées par rapport à celles de la première paire de douilles et que les lignes d'attaque se touchent au moins et sont également inclinées par rapport à celles-ci.
2. Machine selon la revendication 1, caractérisée en ce que les cavités ont une forme assimilable à une bobine et l'une des arêtes est éloignée du joint (23).
EP85115455A 1985-01-11 1985-12-05 Machine à engrenage (pompe ou moteur) Expired EP0189560B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853500673 DE3500673A1 (de) 1985-01-11 1985-01-11 Zahnradmaschine (pumpe oder motor)
DE3500673 1985-01-11

Publications (2)

Publication Number Publication Date
EP0189560A1 EP0189560A1 (fr) 1986-08-06
EP0189560B1 true EP0189560B1 (fr) 1989-04-26

Family

ID=6259585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115455A Expired EP0189560B1 (fr) 1985-01-11 1985-12-05 Machine à engrenage (pompe ou moteur)

Country Status (2)

Country Link
EP (1) EP0189560B1 (fr)
DE (2) DE3500673A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19915784C2 (de) * 1999-04-08 2001-03-01 Fresenius Medical Care De Gmbh Zahnradpumpe, insbesondere für medizinische Zwecke
DE102017112699A1 (de) * 2017-06-08 2018-12-13 Schwäbische Hüttenwerke Automotive GmbH Außenzahnradpumpe
US11060559B2 (en) * 2018-06-11 2021-07-13 Eaton Intelligent Power Limited Bi-metallic journal bearing with additive manufactured sleeve

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE366152C (de) * 1922-12-30 Bbc Brown Boveri & Cie Einrichtung zur Vermeidung der Quetschwirkung bei Zahnrad-OElpumpen
US2865302A (en) * 1955-05-18 1958-12-23 Thompson Prod Inc Pressure-loaded gear pump
GB1148651A (en) * 1965-04-24 1969-04-16 Armstrong Patents Co Ltd Improvements in and relating to gear pumps
DE2510496C3 (de) * 1975-03-11 1978-07-20 Robert Bosch Gmbh, 7000 Stuttgart Zahnradmaschine (Pumpe oder Motor)

Also Published As

Publication number Publication date
DE3569788D1 (en) 1989-06-01
DE3500673A1 (de) 1986-07-17
EP0189560A1 (fr) 1986-08-06

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