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GB1406174A - Hydraulic control system - Google Patents

Hydraulic control system

Info

Publication number
GB1406174A
GB1406174A GB1282973A GB1282973A GB1406174A GB 1406174 A GB1406174 A GB 1406174A GB 1282973 A GB1282973 A GB 1282973A GB 1282973 A GB1282973 A GB 1282973A GB 1406174 A GB1406174 A GB 1406174A
Authority
GB
United Kingdom
Prior art keywords
pressure
valve
spool
spaces
load
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
GB1282973A
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.)
Lockheed Martin Corp
Original Assignee
Sanders Associates 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 Sanders Associates Inc filed Critical Sanders Associates Inc
Publication of GB1406174A publication Critical patent/GB1406174A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2282—Systems using center bypass type changeover valves
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2285—Pilot-operated systems
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86582—Pilot-actuated
    • Y10T137/8659—Variable orifice-type modulator
    • Y10T137/86598—Opposed orifices; interposed modulator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/8667—Reciprocating valve
    • Y10T137/86694—Piston valve
    • Y10T137/8671—With annular passage [e.g., spool]

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Servomotors (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1406174 Fluid-pressure servomotor systems SANDERS ASSOCIATES Inc 16 March 1973 [3 April 1972] 12829/73 Heading G3P A valve spool 53 having lands 67, 68 controlling communication between load ports 46, 47 and supply and exhaust ports 76, 45 is displaced by an increase in pressure in a space 54 or 55 produced by a pilot valve 36, the fluid at increased pressure flowing through a passage 81 or 82 into the load until the pressures in the spaces 54, 55 are again equal. Check-valves 75 and 85, 86 prevent flow from the load into the supply line 75 or into the spaces 54, 55. The pilot valve is supplied with pressure at a higher value than the pressure in the line 44 and may consist of a spool valve operated by a force motor (113), Fig. 6 (not shown) or a pair of single-beat lift valves operated through a loot-motion coupling by a torque motor (91), Fig. 5, (not shown) operation of the valve causing increased flow through one of a pair of restrictions 73, 74 and thus a higher pressure in one of the spaces 54, 55. The spool 53 is constructed as an open-centre valve and connected by conduits 26, 27 to further similar valves as shown in Fig. 1 and to a pump 21 and a tank 22. Each spool is controlled by a separate pilot valve which may be connected to the pump 21 through a common pressure booster. Alternatively, a pressure reducer may be inserted in a line 25 supplying the spools 53. Specification 1273297 is referred to.
GB1282973A 1972-04-03 1973-03-16 Hydraulic control system Expired GB1406174A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24062872A 1972-04-03 1972-04-03

Publications (1)

Publication Number Publication Date
GB1406174A true GB1406174A (en) 1975-09-17

Family

ID=22907287

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1282973A Expired GB1406174A (en) 1972-04-03 1973-03-16 Hydraulic control system

Country Status (8)

Country Link
US (1) US3742980A (en)
JP (1) JPS5341316B2 (en)
AU (1) AU471656B2 (en)
CH (1) CH571166A5 (en)
DE (1) DE2307785A1 (en)
FR (1) FR2178857B1 (en)
GB (1) GB1406174A (en)
SE (1) SE392325B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2141262A (en) * 1983-06-08 1984-12-12 Dowty Hydraulic Units Ltd Servo valve

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893484A (en) * 1973-07-27 1975-07-08 Sanders Associates Inc Cylinder and piston valve
GB1484005A (en) * 1974-08-16 1977-08-24 Lucas Industries Ltd Land vehicle wheel suspension arrangement
DE2514624C3 (en) * 1975-04-03 1986-10-23 Danfoss A/S, Nordborg Control device for at least one hydraulically operated double-acting consumer
US4126293A (en) * 1976-07-16 1978-11-21 Control Concepts, Inc. Feathering valve assembly
DE3122436A1 (en) * 1981-06-05 1983-01-05 Mannesmann Rexroth GmbH, 8770 Lohr Proportional valve
EP0150308A3 (en) * 1984-01-30 1986-10-01 Trw Inc. Apparatus for controlling fluid flow
US4591129A (en) * 1985-05-02 1986-05-27 Deere & Company Valve seal breakaway device
US6296019B1 (en) * 1997-08-26 2001-10-02 Luk Getriebe-Systeme Gmbh Pressure medium system
FR2818331B1 (en) * 2000-12-19 2003-03-14 Snecma Moteurs SERVO VALVE WITH POSITION MEMORY
JP4276491B2 (en) * 2003-08-04 2009-06-10 日立建機株式会社 Directional valve block
DE102006040234A1 (en) * 2006-08-28 2008-03-06 Robert Bosch Gmbh LS control arrangement
US8444400B2 (en) * 2009-02-13 2013-05-21 Caterpillar Inc. Hydraulic cylinder having piston-mounted bypass valve
CN103352889B (en) * 2013-07-08 2015-07-01 太原理工大学 Method for buffering hydraulic system shock of crawler loader
GB201313804D0 (en) * 2013-08-01 2013-09-18 Moog Controls Ltd Improvements in hydraulic servovalves
FR3083271B1 (en) * 2018-06-27 2020-09-04 Safran Landing Systems CONTROL PROCEDURE FOR A THREE-POSITION DRAWER DISPENSER
US11592072B2 (en) * 2020-06-05 2023-02-28 The Boeing Company Dynamic load damping apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3339584A (en) * 1964-06-25 1967-09-05 Borg Warner Directional control valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2141262A (en) * 1983-06-08 1984-12-12 Dowty Hydraulic Units Ltd Servo valve

Also Published As

Publication number Publication date
FR2178857B1 (en) 1976-09-10
DE2307785A1 (en) 1973-10-18
US3742980A (en) 1973-07-03
JPS5341316B2 (en) 1978-11-01
SE392325B (en) 1977-03-21
FR2178857A1 (en) 1973-11-16
AU471656B2 (en) 1976-04-29
JPS497674A (en) 1974-01-23
CH571166A5 (en) 1975-12-31
AU5208473A (en) 1974-08-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]