EP0151798A1 - Pompe ou moteur à engrenage - Google Patents

Pompe ou moteur à engrenage Download PDF

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Publication number
EP0151798A1
EP0151798A1 EP84116245A EP84116245A EP0151798A1 EP 0151798 A1 EP0151798 A1 EP 0151798A1 EP 84116245 A EP84116245 A EP 84116245A EP 84116245 A EP84116245 A EP 84116245A EP 0151798 A1 EP0151798 A1 EP 0151798A1
Authority
EP
European Patent Office
Prior art keywords
bearing bodies
gears
gear
recesses
side faces
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.)
Ceased
Application number
EP84116245A
Other languages
German (de)
English (en)
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 EP0151798A1 publication Critical patent/EP0151798A1/fr
Ceased 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
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
    • 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 machine according to the preamble of the main claim.
  • the difficulty may arise that the sealing bodies are pressed too strongly against the gear side surfaces, which leads to excessive wear or, in the case of gear motors, to poor starting behavior.
  • it can happen that at high temperatures of the pressure medium and the resulting reduction in viscosity, the sealing bodies stand out from the gear side surfaces, which leads to severe losses in efficiency.
  • the gear machine according to the invention with the characterizing features of the main claim has the advantage that the sealing bodies always rest on the gear side surfaces, which means that the operational reliability of the gear machine is also dependent on the viscosity Pressure medium is retained.
  • FIG. 1 shows a longitudinal section through a gear pump
  • FIG. 2 shows a section along II-II according to FIG. 1
  • FIG. 3 shows a section along III-III according to FIG. 1
  • FIGS. 4 and 5 show two views of sealing bodies according to the invention
  • FIG. 6 shows a third sealing body.
  • the gear machine has a housing 10 which has a continuous housing recess 11 with an approximately eight-shaped cross section, which is closed on both sides by covers 12, 13. These are screwed to the housing with the help of screws, not shown.
  • Two meshing gears 14, 15 are arranged in the housing recess.
  • the shafts 16, 17 of the gearwheels are mounted in bores of bushings 18 to 21, which are preferably made of aluminum, and which are also sealing bodies for the gearwheel side surfaces.
  • the bushings 18, 19 are assigned to the gearwheel 14, the bushings 20, 21 to the gearwheel 15.
  • the end faces of the bushings facing away from the gears are flush with the two housing end faces.
  • In the cover 13 there is a through hole 22 through which a drive shaft 23 of the gear J5 penetrates outside.
  • a sealing ring 24 for sealing the drive shaft 23 to the outside is arranged in the bore 22.
  • the bushings 18 to 21 are adapted to the shape of the housing recess 11, i.e. they are cylindrical and each have a flattened area with which they meet.
  • the housing recess 11 penetrates at the level of the gears 14, 15 an outgoing from the housing outer surface inlet bore 25.
  • an outlet bore 26 extends from the housing recess 11 and leads to the outer surface of the housing.
  • recesses 27, 28 are formed which have a continuous course on two bushings lying next to one another.
  • a seal 29 is arranged in the recess 27, a seal 30 in the recess 28. Both seals have approximately the shape of a three, the arcuate parts surrounding the shafts at a short distance.
  • the seals 29, 30 consist of a rubber-elastic material. Since pressures of up to 300 bar and more occur in today's high-performance machines, there is a risk that such seals will be destroyed by the high pressures. That is why the seals are combined with support elements. The seals together with the support element are inserted into the grooves 27, 28 on the bearing bodies.
  • the seals 29, 30 separate two pressure fields from each other on each side of the bushings 18 to 21 facing away from the gear wheels. These are on the side on which the seal 29 lies, with 31 and 32 be draws.
  • the pressure field 3J is subjected to high pressure via a triangular housing recess 33 - it forms the high pressure field, while the pressure field 32 is connected to the low pressure side by a triangular housing recess 34 - ie the pressure field 32 is the low pressure field.
  • the bushings are brought into sealing contact with the gear side surfaces. So that the pressing forces do not become too great, measures are taken on the opposite side of the bushings, which are shown in greater detail in FIGS.
  • arcuate recesses 40, 41 are formed on the sides of the bushing facing the gearwheel surfaces - only the bushes 19, 21 are shown here.
  • the arcuate recesses 40, 41 which are approximately run in the middle of the side surfaces, extend approximately in an angular range - starting from the high pressure side 33 - of approximately 220 °.
  • This embodiment relates to a gear pump for only one direction of rotation.
  • an internal pressure field is formed, which counteracts the pressure fields 31, 32 described above and with which it is achieved that the pressing force of the bushes on the gear side surfaces does not become too great.
  • the pressure in this internal pressure field is independent of viscosity, i.e. in particular on the temperature of the pressure medium, whereby in any case it is achieved that the bushings cannot stand out from the gear side surfaces.
  • the embodiment of Figure 4 is suitable for a reversible gear motor.
  • the bushings 19 ', 21 have differently shaped recesses, which are designated 43, 44 and also have an arc shape again. These recesses are neither connected to the high-pressure side nor to the low-pressure side and extend symmetrically to an imaginary straight line G connecting the two bushings and over an angle of approximately 120 ° .
  • the pressure in the recess 43, 44 reaches there via the tooth chambers, which move along here, and via a gap between the bushings and the housing recess 11.
  • only one socket is shown and designated 19 ′′, since the other socket is designed in exactly the same way.
  • Three recesses 46, 47, 48 can be seen, but which now extend from the edge of the socket.
  • the recess 46 extends again symmetrical to the imaginary straight line G connecting the two sockets, while the recesses 47, 48 start from the flat side of the socket and are connected to the high-pressure or low-pressure side, such a socket is again suitable for a reversible and reverse-loadable gear motor.
  • bushing 19 again only one bushing 19 '"is used. It has two pressure fields 50, 51, which now also extend to the outside of the bushing.
  • the recess 50 extends from the high-pressure side 33 and extends over approximately 270
  • the recess 5J extends from the low-pressure side 34 and extends only over an angle of just under 90 °.
  • Such bushings are only suitable for a gear motor that rotates in one direction and can be loaded with a return load.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP84116245A 1984-02-11 1984-12-22 Pompe ou moteur à engrenage Ceased EP0151798A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3404959 1984-02-11
DE19843404959 DE3404959A1 (de) 1984-02-11 1984-02-11 Zahnradmaschine (pumpe oder motor)

Publications (1)

Publication Number Publication Date
EP0151798A1 true EP0151798A1 (fr) 1985-08-21

Family

ID=6227492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84116245A Ceased EP0151798A1 (fr) 1984-02-11 1984-12-22 Pompe ou moteur à engrenage

Country Status (2)

Country Link
EP (1) EP0151798A1 (fr)
DE (1) DE3404959A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2681647A1 (fr) * 1991-09-24 1993-03-26 Hydroperfect Int Machine hydraulique du type a engrenage a corps flottant.
EP0685650A1 (fr) * 1994-05-31 1995-12-06 SALAMI S.p.A. Dispositif hydraulique à engrènement extérieur
EP1515045A2 (fr) * 2003-09-11 2005-03-16 Haldex Hydraulics Corporation Moteur à engrenages avec contrôle au démarrage
CN105298835A (zh) * 2015-11-17 2016-02-03 天津百利机械装备集团有限公司中央研究院 一种动静压承载圆弧齿轮油泵

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3605246C2 (de) * 1986-02-19 1993-11-25 Bosch Gmbh Robert Zahnradmaschine (Pumpe oder Motor)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB880539A (en) * 1959-04-15 1961-10-25 Clark Equipment Co Pressure loaded gear pump
US3251309A (en) * 1963-04-12 1966-05-17 Parker Hannifin Corp Industrial gear pump
GB2033478A (en) * 1978-11-03 1980-05-21 Bosch Gmbh Robert Rotary positive-displacement fluidmachines
GB2033418A (en) * 1978-09-21 1980-05-21 Johnson Matthey Co Ltd Stabilised Cadmium Pigments
GB2044856A (en) * 1979-03-28 1980-10-22 Commercial Shearing Rotary positive-displacement fluidmachines
US4239468A (en) * 1978-09-08 1980-12-16 The Rexroth Corporation Apparatus for controlling pressure distribution in gear pump
GB2068465A (en) * 1980-01-29 1981-08-12 Commercial Shearing Rotary positive-displacement fluid-machines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB880539A (en) * 1959-04-15 1961-10-25 Clark Equipment Co Pressure loaded gear pump
US3251309A (en) * 1963-04-12 1966-05-17 Parker Hannifin Corp Industrial gear pump
US4239468A (en) * 1978-09-08 1980-12-16 The Rexroth Corporation Apparatus for controlling pressure distribution in gear pump
GB2033418A (en) * 1978-09-21 1980-05-21 Johnson Matthey Co Ltd Stabilised Cadmium Pigments
GB2033478A (en) * 1978-11-03 1980-05-21 Bosch Gmbh Robert Rotary positive-displacement fluidmachines
GB2044856A (en) * 1979-03-28 1980-10-22 Commercial Shearing Rotary positive-displacement fluidmachines
GB2068465A (en) * 1980-01-29 1981-08-12 Commercial Shearing Rotary positive-displacement fluid-machines

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2681647A1 (fr) * 1991-09-24 1993-03-26 Hydroperfect Int Machine hydraulique du type a engrenage a corps flottant.
EP0534836A1 (fr) * 1991-09-24 1993-03-31 Hydroperfect International Hpi Machine hydraulique du type à engrenages à corps flottant
US5240393A (en) * 1991-09-24 1993-08-31 Hydroperfect International - Hpi Hydraulic machine of the gear type
EP0685650A1 (fr) * 1994-05-31 1995-12-06 SALAMI S.p.A. Dispositif hydraulique à engrènement extérieur
EP1515045A2 (fr) * 2003-09-11 2005-03-16 Haldex Hydraulics Corporation Moteur à engrenages avec contrôle au démarrage
EP1515045A3 (fr) * 2003-09-11 2006-10-11 Haldex Hydraulics Corporation Moteur à engrenages avec contrôle au démarrage
CN105298835A (zh) * 2015-11-17 2016-02-03 天津百利机械装备集团有限公司中央研究院 一种动静压承载圆弧齿轮油泵

Also Published As

Publication number Publication date
DE3404959A1 (de) 1985-08-14

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19841222

AK Designated contracting states

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19860610

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19871227

RIN1 Information on inventor provided before grant (corrected)

Inventor name: RUSTIGE, HAYNO, DIPL.-ING.