GB2013370A - Controlling variable-displacement hydraulic devices - Google Patents

Controlling variable-displacement hydraulic devices

Info

Publication number
GB2013370A
GB2013370A GB7901269A GB7901269A GB2013370A GB 2013370 A GB2013370 A GB 2013370A GB 7901269 A GB7901269 A GB 7901269A GB 7901269 A GB7901269 A GB 7901269A GB 2013370 A GB2013370 A GB 2013370A
Authority
GB
United Kingdom
Prior art keywords
displacement hydraulic
hydraulic devices
controlling variable
servovalve
stage
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.)
Granted
Application number
GB7901269A
Other versions
GB2013370B (en
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.)
Moog Inc
Original Assignee
Moog Inc
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 Moog Inc filed Critical Moog Inc
Publication of GB2013370A publication Critical patent/GB2013370A/en
Application granted granted Critical
Publication of GB2013370B publication Critical patent/GB2013370B/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
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/435—Pump capacity control by electric actuators
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
    • F04B1/324—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
    • 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
    • F16H61/431—Pump capacity control by electro-hydraulic control means, e.g. using solenoid valves

Landscapes

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

Abstract

A variable-displacement hydraulic pump (10) has a pivotable swashplate (19) the position of which (19) is set by a 2-stage electrohydraulic servovalve (11) and serropistons (22, 24), and a mechanical feedback connection is provided between the swashplate (18) and the output stage of the servovalve (11) by means of a lever (96) and an arm (103) coupled to the follow-up sleeve (55) of the output stage. As an alternative, the first stage of the servovalve may control the sleeve and the spool may be coupled to the arm. <IMAGE>
GB7901269A 1978-01-16 1979-01-12 Hydraulic apparatus Expired GB2013370B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86982978A 1978-01-16 1978-01-16

Publications (2)

Publication Number Publication Date
GB2013370A true GB2013370A (en) 1979-08-08
GB2013370B GB2013370B (en) 1982-06-03

Family

ID=25354335

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7901269A Expired GB2013370B (en) 1978-01-16 1979-01-12 Hydraulic apparatus

Country Status (3)

Country Link
JP (1) JPS54128803A (en)
DE (1) DE2900755A1 (en)
GB (1) GB2013370B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229144A (en) * 1978-12-07 1980-10-21 Deere & Company Feedback shaft extending between swashplate and displacement control valve
US4211079A (en) * 1979-04-27 1980-07-08 Deere & Company Positive neutral control for hydrostatic transmission
JPS57150277U (en) * 1981-03-16 1982-09-21
JPS6119682U (en) * 1984-07-10 1986-02-04 日立建機株式会社 Oblique axis hydraulic rotating machine
JPH0528122U (en) * 1991-09-18 1993-04-09 日本特殊陶業株式会社 Piezoelectric filter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381624A (en) * 1966-09-09 1968-05-07 Abex Corp Fail-safe control for hydraulic cross-center pump
FR2072473A5 (en) * 1970-02-27 1971-09-24 Orsta Hydraulik Veb K
JPS5547232B2 (en) * 1974-06-07 1980-11-28
JPS52115989A (en) * 1976-03-26 1977-09-28 Nisshin Sangyo Co Doubleeacting valve * control device and touch controlling device

Also Published As

Publication number Publication date
JPS54128803A (en) 1979-10-05
JPH0253634B2 (en) 1990-11-19
DE2900755A1 (en) 1979-07-19
GB2013370B (en) 1982-06-03

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Legal Events

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

Effective date: 19960112