GB1440000A - Hydraulic control circuit - Google Patents

Hydraulic control circuit

Info

Publication number
GB1440000A
GB1440000A GB4274673A GB4274673A GB1440000A GB 1440000 A GB1440000 A GB 1440000A GB 4274673 A GB4274673 A GB 4274673A GB 4274673 A GB4274673 A GB 4274673A GB 1440000 A GB1440000 A GB 1440000A
Authority
GB
United Kingdom
Prior art keywords
valve
servomotor
spring
flow
circuit
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
GB4274673A
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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Publication of GB1440000A publication Critical patent/GB1440000A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/255—Flow control functions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders

Abstract

1440000 Fluid-pressure servomotor systems KOMATSU SEISAKUSHO KK 11 Sept 1973 [31 Oct 1972 29 May 1973] 42746/73 Heading G3P In a hydraulic circuit having two actuators 22, 23, which may be used to control a power shovel, and a pump 10 supplying the circuit and having its displacement adjusted by a servomotor 11, a spring-biased control valve 16a, 16b is displaced by the pressure drop across a throttle 21 when a remote control valve 1 is operated so that all further flow from the valve 1 passes to the servomotor 11 and the flow through the throttle is cut off. The valve 1 also controls spring-centred valves 7, 8 controlling the actuators 22, 23. When the flow from the valve 1 through a circuit 12 to the servomotor 11 ceases, the valve 16a, 16b is displaced by its spring 18 to connect the servomotor to drain.
GB4274673A 1972-10-31 1973-09-11 Hydraulic control circuit Expired GB1440000A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47108463A JPS4965466A (en) 1972-10-31 1972-10-31

Publications (1)

Publication Number Publication Date
GB1440000A true GB1440000A (en) 1976-06-16

Family

ID=14485388

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4274673A Expired GB1440000A (en) 1972-10-31 1973-09-11 Hydraulic control circuit

Country Status (3)

Country Link
US (1) US3871178A (en)
JP (1) JPS4965466A (en)
GB (1) GB1440000A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3537421A1 (en) * 1985-10-21 1987-04-23 Rexroth Mannesmann Gmbh Plastics processing machine with hydraulic drives
DE3812753A1 (en) * 1988-04-16 1989-10-26 Rexroth Mannesmann Gmbh Valve arrangement for a variable displacement pump

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS554561Y2 (en) * 1973-02-16 1980-02-02
US4208874A (en) * 1978-08-28 1980-06-24 Caterpillar Tractor Co. Apparatus for producing different flow rates of a fluid
JPS636474Y2 (en) * 1980-07-28 1988-02-23
JPS5861303A (en) * 1981-10-05 1983-04-12 Kawasaki Heavy Ind Ltd Control circuit for variable-capacity pump
JPH07122276B2 (en) * 1989-07-07 1995-12-25 油谷重工株式会社 Hydraulic pump control circuit for construction machinery
KR0167408B1 (en) * 1993-11-30 1998-12-01 오까다 하지모 Hydraulic pump controller
JP4067596B2 (en) * 1997-03-07 2008-03-26 日立建機株式会社 Hydraulic control equipment for construction machinery
JP3640500B2 (en) * 1997-04-25 2005-04-20 コベルコ建機株式会社 Construction machinery
JP2000230506A (en) * 1999-02-10 2000-08-22 Komatsu Ltd Actuator drive device by operation lever and operation lever device
KR101241713B1 (en) * 2005-12-29 2013-03-08 두산인프라코어 주식회사 Apparatus for controlling the flow rates of the hydraulic pump of a wheel loader
CN100526658C (en) * 2007-04-19 2009-08-12 沈阳市中之杰机电设备制造有限公司 Burning machine inlet guide blade adjusting device
CN105508320B (en) * 2016-02-24 2017-06-16 益阳新华美机电科技有限公司 Two parallel pumps hydraulic pressure converter plant and rubber mixing machine drum driven system
CN107044350B (en) * 2017-04-24 2019-04-23 中国航发沈阳发动机研究所 A kind of fluid power system and the gas turbine with it

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941365A (en) * 1957-07-23 1960-06-21 Sundstrand Corp Hydraulic transmission
US3486334A (en) * 1968-05-16 1969-12-30 Cessna Aircraft Co Hydraulic power transmission control
DE2001701C3 (en) * 1970-01-15 1979-04-05 Linde Ag, 6200 Wiesbaden Setting device for the remote control of a continuously adjustable hydrostatic transmission

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3537421A1 (en) * 1985-10-21 1987-04-23 Rexroth Mannesmann Gmbh Plastics processing machine with hydraulic drives
DE3812753A1 (en) * 1988-04-16 1989-10-26 Rexroth Mannesmann Gmbh Valve arrangement for a variable displacement pump

Also Published As

Publication number Publication date
JPS4965466A (en) 1974-06-25
US3871178A (en) 1975-03-18

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee