GB2304155B - Helical gear pump or motor - Google Patents

Helical gear pump or motor

Info

Publication number
GB2304155B
GB2304155B GB9700560A GB9700560A GB2304155B GB 2304155 B GB2304155 B GB 2304155B GB 9700560 A GB9700560 A GB 9700560A GB 9700560 A GB9700560 A GB 9700560A GB 2304155 B GB2304155 B GB 2304155B
Authority
GB
United Kingdom
Prior art keywords
gears
motor
pressure relief
recesses
gear 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
GB9700560A
Other versions
GB9700560D0 (en
GB2304155A (en
Inventor
Barry Wynn
Jeremy Arthur Sykes
Richard Guy Peach
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.)
David Brown Hydraulics Ltd
Original Assignee
David Brown Hydraulics 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 GB9413676A external-priority patent/GB9413676D0/en
Priority claimed from GBGB9506824.3A external-priority patent/GB9506824D0/en
Application filed by David Brown Hydraulics Ltd filed Critical David Brown Hydraulics Ltd
Publication of GB9700560D0 publication Critical patent/GB9700560D0/en
Publication of GB2304155A publication Critical patent/GB2304155A/en
Application granted granted Critical
Publication of GB2304155B publication Critical patent/GB2304155B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • 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
    • F04C2/02—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • 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
    • F04C2/084—Toothed wheels

Abstract

Hydraulic apparatus, for example a gear pump or motor, for low noise generation employs helical gears (8 and 10) retained within a casing. The contact ratio and the helical advance of the gear teeth (which may be approximately 2 and 1, respectively) are such as to substantially prevent back-flow of hydraulic fluid from the outlet side to the inlet side. In the case of a gear pump, a pressure relief recess (70 or 74) and a fluid feed recess (72 or 76) can communicate with the spaces between the teeth in the meshing zone at each end of the gears, the recesses being so shaped and positioned as to avoid communication with each other by way of said spaces, and the disposition of said recesses at one end of the gears relative to those at the other end thereof being staggered by an amount corresponding to the helical advance. Each pressure relief recess is a slot having a basic end surface (78 or 82) beyond which there extends a subsidiary slot or "nose" (80 or 84), and each fluid feed recess is a slot interconnecting the bearings for the shafts carrying the gears. In the case of a reversible gear motor, respective pressure relief recesses communicate with both ports of the motor at each end of the gears.
GB9700560A 1994-07-07 1995-07-07 Helical gear pump or motor Expired - Lifetime GB2304155B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9413676A GB9413676D0 (en) 1994-07-07 1994-07-07 Hydraulic apparatus
GBGB9506824.3A GB9506824D0 (en) 1995-04-01 1995-04-01 Hydraulic apparatus
PCT/GB1995/001610 WO1996001950A1 (en) 1994-07-07 1995-07-07 Helical gear pump or motor

Publications (3)

Publication Number Publication Date
GB9700560D0 GB9700560D0 (en) 1997-03-05
GB2304155A GB2304155A (en) 1997-03-12
GB2304155B true GB2304155B (en) 1998-08-19

Family

ID=26305215

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9700560A Expired - Lifetime GB2304155B (en) 1994-07-07 1995-07-07 Helical gear pump or motor

Country Status (8)

Country Link
EP (1) EP0769104B1 (en)
JP (1) JP3972072B2 (en)
KR (1) KR970704968A (en)
AT (1) ATE184080T1 (en)
AU (1) AU2892895A (en)
DE (1) DE69511870T2 (en)
GB (1) GB2304155B (en)
WO (1) WO1996001950A1 (en)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2312476B (en) * 1996-04-24 1999-12-08 Sauer Sundstrand Ltd Pressure balance control in gear pumps
DE19725462A1 (en) * 1997-06-16 1998-12-24 Storz Endoskop Gmbh Medical gear pump for suction and rinsing
FR2772839B1 (en) * 1997-12-19 2000-02-11 Hydroperfect Int FUEL PUMP, ESPECIALLY GASOLINE, IN PARTICULAR FOR THE DIRECT INJECTION OF FUEL INTO AN INTERNAL COMBUSTION ENGINE, ELECTRO-PUMP UNIT CONTAINING SUCH A PUMP AND AUTOMOTIVE VEHICLE EQUIPPED WITH AN ELECTRO-PUMP UNIT
GB2336876B (en) * 1998-04-29 2001-06-27 Sauer Sundstrand Ltd Separated helical gear pump
US6739850B2 (en) * 2001-10-25 2004-05-25 Kyosan Denki Co., Ltd. Motor-type fuel pump for vehicle
US6887055B2 (en) 2002-10-25 2005-05-03 Mario Antonio Morselli Positive-displacement rotary pump
DE202006014930U1 (en) * 2006-09-28 2008-02-14 Trw Automotive Gmbh Hydraulic device
ITBO20070172A1 (en) 2007-03-14 2008-09-15 Mario Antonio Morselli HYDRAULIC EQUIPMENT WITH REFINED GEARS
JP5892792B2 (en) * 2008-07-18 2016-03-23 ベクトン・ディキンソン・アンド・カンパニーＢｅｃｔｏｎ， Ｄｉｃｋｉｎｓｏｎ Ａｎｄ Ｃｏｍｐａｎｙ Two chamber and gear pump assembly for high pressure drug delivery system
IT1396898B1 (en) * 2008-12-02 2012-12-20 Marzocchi Pompe S P A TOOTHED PROFILE FOR VOLUMETRIC PUMP ROTORS WITH EXTERNAL GEARS.
IT1398817B1 (en) 2009-10-30 2013-03-21 Morselli TOOTHED WHEEL WITH PROFILE TO ENGAGE WITH SEMI-INCAPSULATION IN A GEAR HYDRAULIC EQUIPMENT
US9404366B2 (en) 2009-10-30 2016-08-02 Settima Meccanica S.R.L. Gear wheel with profile capable of meshing with semi-encapsulation in a geared hydraulic apparatus
JP5395631B2 (en) * 2009-11-13 2014-01-22 上田鉄工株式会社 Gear pump
US9022761B2 (en) * 2012-08-22 2015-05-05 Roper Pump Company Elliptical gear pump fluid driving apparatus
CN102966537A (en) * 2012-11-22 2013-03-13 无锡市东方液压件制造有限公司 Helical gear oil pump suitable for automobile steering systems
JP2014205129A (en) * 2013-04-11 2014-10-30 エース技研株式会社 Liquid discharge unit
EP2837827B1 (en) 2013-06-27 2016-06-01 Sumitomo Precision Products Co., Ltd. Hydraulic device
CN103644115A (en) * 2013-08-29 2014-03-19 钟文填 Biarc screw pump
DE102013226852A1 (en) 2013-12-20 2015-06-25 Volkswagen Aktiengesellschaft gear pump
JP2017223197A (en) * 2016-06-17 2017-12-21 住友精密工業株式会社 Hydraulic device
DE102017207733A1 (en) * 2017-05-08 2018-11-08 Robert Bosch Gmbh External gear machine, exhaust heat recovery system with an external gear machine
US10634135B2 (en) 2017-06-23 2020-04-28 Hamilton Sunstrand Corporation Reduction of cavitation in gear pumps
IT201800005956A1 (en) * 2018-06-01 2019-12-01 VOLUMETRIC GEAR MACHINE WITH HELICAL TEETH
EP3936725A4 (en) * 2019-03-08 2022-03-23 Shimadzu Corporation Helical gear pump or motor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1355756A (en) * 1963-02-07 1964-03-20 Johannes Freres Improved gear pump intended more particularly for public works machinery
US3209611A (en) * 1961-05-02 1965-10-05 Iyoi Hitosi Teeth profiles of rotors for gear pumps of rotary type
US4265606A (en) * 1979-11-21 1981-05-05 Lehnus Edward L Fositive displacement pulse free rotary fluid pump
US4548562A (en) * 1982-09-07 1985-10-22 Ford Motor Company Helical gear pump with specific helix angle, tooth contact length and circular base pitch relationship
US5108275A (en) * 1990-12-17 1992-04-28 Sager William F Rotary pump having helical gear teeth with a small angle of wrap

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209611A (en) * 1961-05-02 1965-10-05 Iyoi Hitosi Teeth profiles of rotors for gear pumps of rotary type
FR1355756A (en) * 1963-02-07 1964-03-20 Johannes Freres Improved gear pump intended more particularly for public works machinery
US4265606A (en) * 1979-11-21 1981-05-05 Lehnus Edward L Fositive displacement pulse free rotary fluid pump
US4548562A (en) * 1982-09-07 1985-10-22 Ford Motor Company Helical gear pump with specific helix angle, tooth contact length and circular base pitch relationship
US5108275A (en) * 1990-12-17 1992-04-28 Sager William F Rotary pump having helical gear teeth with a small angle of wrap

Also Published As

Publication number Publication date
KR970704968A (en) 1997-09-06
WO1996001950A1 (en) 1996-01-25
ATE184080T1 (en) 1999-09-15
EP0769104B1 (en) 1999-09-01
GB9700560D0 (en) 1997-03-05
DE69511870D1 (en) 1999-10-07
JP3972072B2 (en) 2007-09-05
DE69511870T2 (en) 2000-05-04
GB2304155A (en) 1997-03-12
JPH10502715A (en) 1998-03-10
EP0769104A1 (en) 1997-04-23
AU2892895A (en) 1996-02-09

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20150706