EP0361716B1 - Improvements relating to gerotor pumps - Google Patents

Improvements relating to gerotor pumps Download PDF

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Publication number
EP0361716B1
EP0361716B1 EP89309135A EP89309135A EP0361716B1 EP 0361716 B1 EP0361716 B1 EP 0361716B1 EP 89309135 A EP89309135 A EP 89309135A EP 89309135 A EP89309135 A EP 89309135A EP 0361716 B1 EP0361716 B1 EP 0361716B1
Authority
EP
European Patent Office
Prior art keywords
rotor
gear
shaft
journalled
pump
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
EP89309135A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0361716A3 (en
EP0361716A2 (en
Inventor
Steve Hodge
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
Priority claimed from GB888822696A external-priority patent/GB8822696D0/en
Application filed by Concentric Pumps Ltd filed Critical Concentric Pumps Ltd
Priority to AT89309135T priority Critical patent/ATE93933T1/de
Publication of EP0361716A2 publication Critical patent/EP0361716A2/en
Publication of EP0361716A3 publication Critical patent/EP0361716A3/en
Application granted granted Critical
Publication of EP0361716B1 publication Critical patent/EP0361716B1/en
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
    • 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
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations

Definitions

  • This invention relates to gerotor pumps comprising a male lobed rotor meshed internally of a female lobed annulus.
  • the annulus has more lobes - usually one more than the rotor, and their axes are eccentric.
  • the chambers bounded by the respective lobes open to an inlet, and on the other side of that plane they open to an outlet. Relative rotation causes said chambers to process about the axes and so vary in size thus inducing flow into the chambers on the inlet side and expelling it out on the outlet side.
  • Such pumps are herein called "of the kind referred to”.
  • Drive may be imparted to the pump via the annulus as for example in DE-A-3504306 or via the rotor as for example in FR-A-2527683 which shows the rotor journalled on a stationary shaft (which in that specification is a tube forming part of the fluid flow path) and having projecting dogs which are engaged in a complementary bore of a drive gear which is also journalled on the shaft.
  • the problem with this arrangement is that the pump requires a substantial axial length: firstly there is the unavoidable axial length of the gerotor set which is one of the parameters involved in pump output characteristic, then there is the axial length necessary for the mechanical coupling between the dogs and their complementary formation of the drive gear, and thirdly there is the length required for adequate journalling of the drive gear itself.
  • the object of the invention is to provide a rotor driven gerotor pump requiring less axial space.
  • a pump comprising a male lobed rotor provided on a shaft, rotatable about the shaft axis and meshed with an internally lobed annulus itself rotatable in a pump body on a second and parallel axis, said annulus having more lobes than the rotor, and a gear for driving the rotor, said gear being mechanically coupled to the rotor and journalled on the said shaft, is characterised in that said mechanical coupling between the gear and rotor takes place within the axial dimension of the rotor.
  • the gear and rotor may be journalled on successive portions of the shaft with drive dogs on the parts engaged together within the axial confine of the rotor or the gear may have a hub portion journalled on the shaft and keyed or splined in the bore of the rotor which is thereby indirectly journalled on the shaft.
  • a pump body 10 is provided with one or more inlet passages 12 opening through the side wall (not shown) to the cavity housing the annulus 14 and rotor 16.
  • the outlet passage opens from that cavity. It will be appreciated that both inlet and outlet may open generally radially or tangentially from the cavity or through one or other side wall, or a combination of these according to requirements.
  • Shaft 18 is fast in the body, for example being a press-fit.
  • it is bushed at 20-22 to journal the rotor 16 and the drive gear 24 respectively.
  • a passage system 30-32 shown in dotted line communicates with port 34 to allow lubrication of the bushes.
  • the drive gear (or sprocket 24) is provided with axially extending dogs 28 (see Figure 2) which mesh with like dogs 26 in the rotor 16 so that the gear and rotor are directly dogged together for drive between them.
  • the gear drives the rotor which drives the annulus at a different speed for the usual gerotor pumping action.
  • the arrangement is generally similar except that here the gear 24 has a hub portion 38 extending over the full axial dimension of the rotor 16, so that the rotor may be considered to be indirectly journalled on the shaft.
  • the hub and rotor are keyed or splined together at 46 for direct drive between them.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP89309135A 1988-09-28 1989-09-08 Improvements relating to gerotor pumps Expired - Lifetime EP0361716B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89309135T ATE93933T1 (de) 1988-09-28 1989-09-08 Gerotorpumpen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB888822696A GB8822696D0 (en) 1988-09-28 1988-09-28 Improvements relating to gerotor pumps
GB8822696 1988-09-28
GB8913368 1989-06-09
GB8913368A GB2223275B (en) 1988-09-28 1989-06-09 Improvements relating to gerotor pumps

Publications (3)

Publication Number Publication Date
EP0361716A2 EP0361716A2 (en) 1990-04-04
EP0361716A3 EP0361716A3 (en) 1990-07-11
EP0361716B1 true EP0361716B1 (en) 1993-09-01

Family

ID=26294448

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89309135A Expired - Lifetime EP0361716B1 (en) 1988-09-28 1989-09-08 Improvements relating to gerotor pumps

Country Status (15)

Country Link
EP (1) EP0361716B1 (es)
JP (1) JPH02185682A (es)
AR (1) AR247277A1 (es)
AU (1) AU617002B2 (es)
BR (1) BR8904894A (es)
CA (1) CA1333857C (es)
DE (1) DE68908826T2 (es)
DK (1) DK172577B1 (es)
ES (1) ES2045459T3 (es)
FI (1) FI98949C (es)
IE (1) IE62731B1 (es)
IN (1) IN176246B (es)
NO (1) NO893845L (es)
NZ (1) NZ230719A (es)
PT (1) PT91814B (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69108289T2 (de) * 1990-05-12 1995-08-03 Concentric Pumps Ltd Gerotorpumpen.
GB9015291D0 (en) * 1990-07-11 1990-08-29 Concentric Pumps Ltd Improvements in gerotor pumps
GB9217540D0 (en) * 1992-08-18 1992-09-30 Concentric Pumps Ltd Imprivements relating to pumps
DE29710407U1 (de) * 1996-11-12 1997-07-31 Voith Turbo GmbH & Co. KG, 89522 Heidenheim Innenzahnradpumpe mit Antrieb über das Hohlrad
GB2386171A (en) * 2002-03-06 2003-09-10 Concentric Pumps Ltd Transmission pump
DE102006008757A1 (de) * 2006-02-24 2007-08-30 Daimlerchrysler Ag Förderpumpe in einem Kraftfahrzeug
RU2472970C1 (ru) * 2011-10-11 2013-01-20 Открытое акционерное общество "Научно-производственное объединение "Сатурн" (ОАО "НПО "Сатурн") Героторный насос с торцовым входом
CN105065259B (zh) * 2015-08-27 2018-02-23 天津雷沃动力有限公司 一种柴油机机油泵的润滑结构

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU444432B2 (en) * 1967-10-23 1974-01-04 Improved Mechanical Products Proprietary Limited Gear type fluid motor or pump
JPS6029604Y2 (ja) * 1981-06-16 1985-09-06 富士重工業株式会社 内燃機関の潤滑油ポンプ
YU42768B (en) * 1982-05-31 1988-12-31 Tomos Koper Oil pump for pressure lubrication of a four stroke internal combustion engine
DE3504306A1 (de) * 1984-02-16 1985-08-22 Volkswagenwerk Ag, 3180 Wolfsburg Pumpe, insbesondere oelpumpe fuer eine brennkraftmaschine
DE3506928C2 (de) * 1985-02-27 1993-12-23 Schwaebische Huettenwerke Gmbh Innenzahnradpumpe als Schmierölpumpe für einen Verbrennungsmotor

Also Published As

Publication number Publication date
AU617002B2 (en) 1991-11-14
DE68908826D1 (de) 1993-10-07
DK471889D0 (da) 1989-09-26
JPH02185682A (ja) 1990-07-20
DK172577B1 (da) 1999-02-01
IN176246B (es) 1996-03-23
EP0361716A3 (en) 1990-07-11
IE893087L (en) 1990-03-28
BR8904894A (pt) 1990-05-08
ES2045459T3 (es) 1994-01-16
DK471889A (da) 1990-03-29
EP0361716A2 (en) 1990-04-04
PT91814A (pt) 1990-03-30
CA1333857C (en) 1995-01-10
FI98949C (fi) 1997-09-10
PT91814B (pt) 1995-08-09
FI98949B (fi) 1997-05-30
NO893845L (no) 1990-03-29
FI894603A (fi) 1990-03-29
IE62731B1 (en) 1995-02-22
NO893845D0 (no) 1989-09-27
FI894603A0 (fi) 1989-09-28
NZ230719A (en) 1991-09-25
DE68908826T2 (de) 1993-12-23
AR247277A1 (es) 1994-11-30
AU4128789A (en) 1990-04-05

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