GB837775A - Improvements in hydraulic constant speed devices - Google Patents

Improvements in hydraulic constant speed devices

Info

Publication number
GB837775A
GB837775A GB19171/57A GB1917157A GB837775A GB 837775 A GB837775 A GB 837775A GB 19171/57 A GB19171/57 A GB 19171/57A GB 1917157 A GB1917157 A GB 1917157A GB 837775 A GB837775 A GB 837775A
Authority
GB
United Kingdom
Prior art keywords
pressure
pump
conduit
valve
delivery
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
GB19171/57A
Inventor
Bertram Anthony Peaster
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.)
Lucas Support Services Ltd
Original Assignee
Integral 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 Integral Ltd filed Critical Integral Ltd
Priority to GB19171/57A priority Critical patent/GB837775A/en
Priority to DEI14962A priority patent/DE1167146B/en
Priority to FR1197312D priority patent/FR1197312A/en
Priority to US743174A priority patent/US2956406A/en
Publication of GB837775A publication Critical patent/GB837775A/en
Expired 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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F16H61/472—Automatic regulation in accordance with output requirements for achieving a target output torque

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Gearings (AREA)
  • Hydraulic Motors (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

837,775. Swash plate pumps. INTEGRAL Ltd. May 29, 1958 [June 18, 1957], No. 19171/57. Class 102(1). [Also in Group XXIX] The speed of a hydraulic motor driven by the liquid delivered by a multiple plunger pump which may be connected e.g. to an aircraft engine for driving an alternator coupled to the hydraulic motor, is maintained constant by means comprising spill valve sleeves associated with the pump plungers and movable to vary the effective delivery strokes of the plungers by a servo piston which is exposed on its opposite sides to the delivery pressure of the pump and to the pressure in an outlet conduit from the pump delivery line controlled by a leakoff valve, this leak-off valve being responsive to a variable hydraulic signal pressure representative of the speed of the hydraulic motor. The hydraulic motor 2 coupled to the alternator 3 is driven by the liquid delivered by a swashplate pump 1 having hollow plungers 9, 10 which receive liquid through inlet ports in the pump cylinders 90 at the end of their suction strokes. Spill ports 12 in the plungers, through which liquid is spilled during a variable part of each delivery stroke, are controlled by movable valve sleeves 24 connected through a spring loaded plate 15 to a servo piston 18. This piston is subject on one side to the pump delivery pressure through passage 118 and on the other side to the pressure of controlled liquid supplied to a conduit 19 through a restriction 20. An open end of conduit 19 is obturated by a hinged half ball leak-off valve 8 which is subject in one direction to the force of a loading spring 28 plus a datum pressure from an outlet 6 of the hydraulic motor and in the opposite direction to'the pressure in a signal conduit 5 connected to the peripheral discharge chamber of an impeller 4 which takes its suction from the motor outlet 6. The half ball valve is biased towards the closed position by a differential area piston 23 subject on opposite sides to the pump delivery pressure through a pipe 27 or alternatively to the pressure from conduit 19. On a rise of motor speed above that determined by loading spring 28, the pressure in conduit 19 is reduced and servo piston 18 causes the sleeves 24 to move to the right, thus reducing the effective delivery stroke of each plunger to restore the predetermined speed. Conversely on falling speed, the pump delivery is increased. Specification 820,417 is referred to.
GB19171/57A 1957-06-18 1957-06-18 Improvements in hydraulic constant speed devices Expired GB837775A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB19171/57A GB837775A (en) 1957-06-18 1957-06-18 Improvements in hydraulic constant speed devices
DEI14962A DE1167146B (en) 1957-06-18 1958-06-10 Speed control device for the motor of a fluid transmission
FR1197312D FR1197312A (en) 1957-06-18 1958-06-18 Constant speed hydraulic device
US743174A US2956406A (en) 1957-06-18 1958-06-19 Hydraulic constant speed devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19171/57A GB837775A (en) 1957-06-18 1957-06-18 Improvements in hydraulic constant speed devices

Publications (1)

Publication Number Publication Date
GB837775A true GB837775A (en) 1960-06-15

Family

ID=10124926

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19171/57A Expired GB837775A (en) 1957-06-18 1957-06-18 Improvements in hydraulic constant speed devices

Country Status (4)

Country Link
US (1) US2956406A (en)
DE (1) DE1167146B (en)
FR (1) FR1197312A (en)
GB (1) GB837775A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0493596A1 (en) * 1989-09-22 1992-07-08 Kabushiki Kaisha Komatsu Seisakusho Capacity control circuit for variable capacity pump

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3033321A (en) * 1957-05-09 1962-05-08 Heenan & Froude Ltd Hydraulic dynamometers
US3058297A (en) * 1960-04-26 1962-10-16 Lucas Industries Ltd Transmission system for use in a vehicle
DE1272068B (en) * 1963-07-23 1968-07-04 Borg Warner Hydrostatic axial piston transmission
DE1301715B (en) * 1966-04-26 1969-08-21 Schottel Werft Hydraulic linkage for actuating a piston guided in a cylinder
US7284617B2 (en) * 2004-05-20 2007-10-23 Weatherford/Lamb, Inc. Casing running head

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732805A (en) * 1956-01-31 Lucien
US2291011A (en) * 1942-07-28 Speed governor
GB642247A (en) * 1946-04-01 1950-08-30 New York Air Brake Co Improvements relating to the hydraulic transmission of power
US2562615A (en) * 1948-12-06 1951-07-31 New York Air Brake Co Hydraulic control system responsive to pressure and flow rate
US2803112A (en) * 1951-12-04 1957-08-20 Sundstrand Machine Tool Co Control means for constant speed hydraulic pump and motor transmission
DE949985C (en) * 1952-08-14 1956-09-27 Siam Piston pump with constant stroke and depending on the delivery pressure variable delivery rate
US2888806A (en) * 1955-03-16 1959-06-02 Sundstrand Machine Tool Co Control system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0493596A1 (en) * 1989-09-22 1992-07-08 Kabushiki Kaisha Komatsu Seisakusho Capacity control circuit for variable capacity pump
EP0493596A4 (en) * 1989-09-22 1992-07-22 Kabushiki Kaisha Komatsu Seisakusho Capacity control circuit for variable capacity pump
US5226800A (en) * 1989-09-22 1993-07-13 Kabushiki Kaisha Komatsu Seisakusho Displacement controlling circuit system for variable displacement pump

Also Published As

Publication number Publication date
US2956406A (en) 1960-10-18
FR1197312A (en) 1959-11-30
DE1167146B (en) 1964-04-02

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