EP0174734A2 - Pompe à huile - Google Patents

Pompe à huile Download PDF

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Publication number
EP0174734A2
EP0174734A2 EP85305638A EP85305638A EP0174734A2 EP 0174734 A2 EP0174734 A2 EP 0174734A2 EP 85305638 A EP85305638 A EP 85305638A EP 85305638 A EP85305638 A EP 85305638A EP 0174734 A2 EP0174734 A2 EP 0174734A2
Authority
EP
European Patent Office
Prior art keywords
pump
roller bearings
rings
output
rotor
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Withdrawn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
EP85305638A
Other languages
German (de)
English (en)
Other versions
EP0174734A3 (fr
Inventor
Robin Edward Child
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.)
Concentric Pumps Ltd
Original Assignee
Concentric Pumps Ltd
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 Concentric Pumps Ltd filed Critical Concentric Pumps Ltd
Publication of EP0174734A2 publication Critical patent/EP0174734A2/fr
Publication of EP0174734A3 publication Critical patent/EP0174734A3/fr
Withdrawn legal-status Critical Current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
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F04C14/223—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
    • 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
    • F04C2/102—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 the two members rotating simultaneously around their respective axes

Definitions

  • FIGS 1 and 2 of DAS 1231563 show a known non-adjustable internally meshing gear pump in which a toothed rotor rotates in and with an internally toothed annulus having one more tooth.
  • BP 1426223 shows a similar pump with the toothed annulus mounted in an eccentric ring arranged to be oriven by a rack and pinion, with the intention of displacing the axis of the annulus about that of the rotor.
  • the pump output is at a maximum. Hence turning the annulus from that position reduces the output.
  • the output volume of the pump depends, among other factors, on the axial length of the rotating parts. Smoothness of operation, in particular the (usually undesirable) pulsating effect or lack of it, depend upon the number of teeth or lobes on the rotor and in the annulus.
  • EP 0076033A proposes dividing the annulus into two axially spaced portions each with its own gear set driven from a common pinion so that the annuli can be turneo in opposite directions simultaneously. This has the advantage of giving adjustment of output in the same way as in the mentioned BP but allows a smoother more ripple- free output because the respective lobes can be out of phase. However it is found in practice that the device of said BP is impractical.
  • the object of the present invention is to provide a variable output pump of this kind which is practical.
  • an internally meshing gear pump comprises a pair of axially spaced internally toothed annulus portions each located in a corresponding eccentric ring and both encompassing a common rotor, said rings being provided with gear teeth meshed with a common pinion whereby the rings can be turned in opposite direction to vary the eccentricity of the annuli likewise and hence vary the output of the pump, and characterised in that each ring is journalled by a set of roller bearings.
  • needle roller bearings are used.
  • the invention is based on the discovery that the impracticability of the oesign of said BP 0076033A is due to it jamming, and recognition that the jamming is due to the ec centric rings being subject to forces which wedge them against the housing bore.
  • the inner rotor 12 has n lobes, for example six lobes and meshes with the internally toothed or lohea annulus 16 which has n + 1, in this instance seven, lobes.
  • a single rotor 12 is proviaed ariven by shaft 14, but two annuli 16,18 (both alike) are proviaed axially spaced on the rotor 12.
  • the annuli lie within corresponainy rings 20,. 22 which are provided with peripheral gear teeth meshed with a common pinion 24. The latter can be driven by a rack 30 to turn the rings 20,22 in opposite direction and vary the eccentricity ot the axes of the annuli 16, 18 with respect to the axis of the rotor 12.
  • a ring of needle roller bearings 40 is provided between the ring 20 and the body and a comparable set between the body and the ring 22. One set is held in place axially by the body, and the other similarly by the cover plate. In cases where the installation space permits the rollers may be retainea axially within the axial length of the eccentric rings by providing lips or flanges at the ends adjacent to the body and cover faces.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP85305638A 1984-09-08 1985-08-08 Pompe à huile Withdrawn EP0174734A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB848422755A GB8422755D0 (en) 1984-09-08 1984-09-08 Oil pumps
GB8422755 1984-09-08

Publications (2)

Publication Number Publication Date
EP0174734A2 true EP0174734A2 (fr) 1986-03-19
EP0174734A3 EP0174734A3 (fr) 1986-12-30

Family

ID=10566477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85305638A Withdrawn EP0174734A3 (fr) 1984-09-08 1985-08-08 Pompe à huile

Country Status (4)

Country Link
EP (1) EP0174734A3 (fr)
JP (1) JPH0681955B2 (fr)
ES (1) ES8609606A1 (fr)
GB (1) GB8422755D0 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2192669A (en) * 1986-07-07 1988-01-20 Concentric Pumps Ltd Oil pump
GB2204096A (en) * 1987-03-20 1988-11-02 Concentric Pumps Ltd Variable output oil pump
FR2654160A1 (fr) * 1989-11-09 1991-05-10 Lecocq Andre Machine tournante a fluide et a debit variables a engrenages.
GB2265946B (en) * 1992-04-08 1995-01-18 Concentric Pumps Ltd Improvements relating to pumps
US5544540A (en) * 1994-12-29 1996-08-13 Dana Corporation Gerotor pump for vehicle transmission lubrication system
DE10045893A1 (de) * 2000-09-16 2002-03-28 Zahnradfabrik Friedrichshafen Hydraulikpumpe

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1964330A (en) * 1934-06-26 rotary pump
GB1426223A (en) * 1973-05-15 1976-02-25 Concentric Pumps Ltd Rotary positive-idsplacement pumps
US4492539A (en) * 1981-04-02 1985-01-08 Specht Victor J Variable displacement gerotor pump
EP0076033A1 (fr) * 1981-09-03 1983-04-06 Concentric Pumps Limited Pompe à engrènement intérieur à refoulement variable

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2192669A (en) * 1986-07-07 1988-01-20 Concentric Pumps Ltd Oil pump
EP0252612A3 (en) * 1986-07-07 1988-07-20 Concentric Pumps Limited Oil pump
US4778361A (en) * 1986-07-07 1988-10-18 Concentric Pumps Limited Variable output gerotor pump
GB2192669B (en) * 1986-07-07 1990-01-31 Concentric Pumps Ltd Oil pump
GB2204096A (en) * 1987-03-20 1988-11-02 Concentric Pumps Ltd Variable output oil pump
GB2204096B (en) * 1987-03-20 1991-02-06 Concentric Pumps Ltd Variable output oil pump
FR2654160A1 (fr) * 1989-11-09 1991-05-10 Lecocq Andre Machine tournante a fluide et a debit variables a engrenages.
GB2265946B (en) * 1992-04-08 1995-01-18 Concentric Pumps Ltd Improvements relating to pumps
US5544540A (en) * 1994-12-29 1996-08-13 Dana Corporation Gerotor pump for vehicle transmission lubrication system
DE10045893A1 (de) * 2000-09-16 2002-03-28 Zahnradfabrik Friedrichshafen Hydraulikpumpe

Also Published As

Publication number Publication date
JPH0681955B2 (ja) 1994-10-19
ES546766A0 (es) 1986-07-16
JPS6181589A (ja) 1986-04-25
GB8422755D0 (en) 1984-10-10
EP0174734A3 (fr) 1986-12-30
ES8609606A1 (es) 1986-07-16

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Inventor name: CHILD, ROBIN EDWARD