GB1311188A – Hydrostatic power transmission system
– Google Patents
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
1970-06-18
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.)
1970-06-18
Filing date
1970-06-18
Publication date
1973-03-21
1970-06-18
Application filed by Individual
filed
Critical
Individual
1973-03-21
Publication of GB1311188A
publication
Critical
patent/GB1311188A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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
1970
1970-06-18
GB
GB1311188D
patent/GB1311188A/en
not_active
Expired
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
1973-08-01
PS
Patent sealed
1987-02-11
PCNP
Patent ceased through non-payment of renewal fee
