GB1311188A - Hydrostatic power transmission system - Google Patents

Hydrostatic power transmission system

Info

Publication number
GB1311188A
GB1311188A GB1311188DA GB1311188A GB 1311188 A GB1311188 A GB 1311188A GB 1311188D A GB1311188D A GB 1311188DA GB 1311188 A GB1311188 A GB 1311188A
Authority
GB
United Kingdom
Prior art keywords
motor
pressure
displacement
constant
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
Application number
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1311188A publication Critical patent/GB1311188A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F16H61/4035—Control of circuit flow
    • 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
    • F16H61/44—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation
    • F16H61/456—Control of the balance of torque or speed between pumps or motors
    • 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
    • F16H61/465—Automatic regulation in accordance with output requirements for achieving a target input speed
    • 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
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/423—Motor capacity control by fluid pressure control means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

1311188 Hydrostatic transmission control B C WILKINS 15 June 1971 [18 June 1970] 29600/70 Heading F2D [Also in Division F1] A hydrostatic transmission comprises a variable delivery pump 11 controlled to provide a constant delivery pressure 13 which is supplied to two or more motors 21, 24, 30, 44 which are respectively controlled to provide constant output torque, power or speed. The pump delivery pressure is supplied to a pressure responsive servo 15 which adjusts the pump displacement to provide a constant delivery pressure. Alternatively the pump delivery pressure may be supplied to a pressure responsive servo 16 which controls the speed of a driving engine 10 to provide a constant delivery pressure from the pump 11. The motor 21 is set to and maintained at a constant displacement to provide a constant torque at its output 23. The displacement of the motor 24 is varied by a pressure sensitive servo 27 in accordance with the pressure drop across an orifice 28 in the motor return line 29 to provide a constant power at its output 26. The displacement of the motor 30 and a variable throttle valve 34 are adjusted by a pressure sensitive servo 33 responsive to the pressure drop across the throttle valve 34 to provide a constant speed at the motor output 32. The linearly acting motor 44 is connected between two motors 39a, 39b which are connected hydraulically in series and have their rotors 40a, 40b connected together. The inlet to the motor 39a is connected to the high pressure line 13 whilst the outlet from the motor 39b is connected to the return line 45. If the displacement of the motors 39a, 39b are maintained in set positions a constant pressure is supplied to the motor 44. To maintain a constant flow to the motor 44, irrespective of pressure, the displacement of the motor 39b is set to a value giving maximum permitted pressure to the motor 44 (when the displacement of the motor 39a is maximum) and controlling the displacement of the motor 39a in accordance with the flow required to the hydrostatic motor 44. To maintain a constant power at the motor 44 the displacement of the motor 39b is set to a position giving maximum pressure (when the displacement of the motor 39a is maximum) and controlling the displacement of the motor 39a to maintain a constant flow into the inlet port 42a of the motor 39a. An accumulator 48 may be provided in the high pressure line 13.
GB1311188D 1970-06-18 1970-06-18 Hydrostatic power transmission system Expired GB1311188A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2960070 1970-06-18

Publications (1)

Publication Number Publication Date
GB1311188A true GB1311188A (en) 1973-03-21

Family

ID=10294113

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1311188D Expired GB1311188A (en) 1970-06-18 1970-06-18 Hydrostatic power transmission system

Country Status (1)

Country Link
GB (1) GB1311188A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2315102A (en) * 1996-07-10 1998-01-21 Samsung Heavy Ind Hydraulic system for power loaders

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2315102A (en) * 1996-07-10 1998-01-21 Samsung Heavy Ind Hydraulic system for power loaders

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee