GB1361680A - Hydraulic actuator controls - Google Patents

Hydraulic actuator controls

Info

Publication number
GB1361680A
GB1361680A GB2172572A GB2172572A GB1361680A GB 1361680 A GB1361680 A GB 1361680A GB 2172572 A GB2172572 A GB 2172572A GB 2172572 A GB2172572 A GB 2172572A GB 1361680 A GB1361680 A GB 1361680A
Authority
GB
United Kingdom
Prior art keywords
valve
pressure
actuator
pilot
controlled
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
GB2172572A
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.)
Unisys Group Services Ltd
Original Assignee
Sperry Rand 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 Sperry Rand Ltd filed Critical Sperry Rand Ltd
Priority to GB2172572A priority Critical patent/GB1361680A/en
Priority to AU44772/72A priority patent/AU4477272A/en
Priority to FR7226485A priority patent/FR2147119B2/fr
Priority to DE19722235788 priority patent/DE2235788A1/en
Priority to IT2732372A priority patent/IT963281B/en
Publication of GB1361680A publication Critical patent/GB1361680A/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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • 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
    • F15B2211/20538—Type of pump constant capacity
    • 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3052—Shuttle valves
    • 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
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • 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
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle valves
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/67—Methods for controlling pilot 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/76—Control of force or torque of the output member

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1361680 Fluid-pressure servomotor systems SPERRY RAND Ltd 21 July 1972 [23 July 1971 10 May 1972] 34557/71 and 21725/72 Addition to 1335041 Heading G3P [Also in Division F1] An actuator 116, Fig. 1, is controlled by a main control valve 80 and a pilot valve 42 which controls the fluid-pressure for operating the valve 80. A motor 40 applies a first force proportional to an electrical signal to the spool 48 of the pilot valve, and a shuttle valve 140, which is responsive to the pressures in the actuator 116, applies an opposing force to the spool 48. In addition the main valve 80 is controlled by a second pilot valve 12 which is itself controlled by an electrical input to a motor 11 and an opposing signal from a flow-sensing device 322. The two pilot valves are in series and either one may be set to over-ride the other. With the piston 120 moving to the right it may happen that the pressure P 1 may exceed the pressure P 2 . Under these conditions the shuttle valve 140 would cause the main valve to close further thus increasing the difference between P 1 and P 2 . Fig. 8 shows a modified circuit which overcomes this. In this circuit shuttle valve 440 is responsive to the pressure difference across the main valve 80 rather than across the actuator 116. Since the pressure in line 156 leading to the chamber 46 is not necessarily the higher of the two pressures P 1 , P 2 , the pressure in this line is no longer suitable for controlling a variable volume pump. The pump control line 145 is therefore connected via an auxiliary shuttle valve 460 to whichever of the ports 104, 106 of the valve 80 is at the higher pressure.
GB2172572A 1971-07-23 1972-05-10 Hydraulic actuator controls Expired GB1361680A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB2172572A GB1361680A (en) 1971-07-23 1972-05-10 Hydraulic actuator controls
AU44772/72A AU4477272A (en) 1971-07-23 1972-07-20 Hydraulic actuator controls
FR7226485A FR2147119B2 (en) 1971-07-23 1972-07-21
DE19722235788 DE2235788A1 (en) 1971-07-23 1972-07-21 CONTROL DEVICE FOR HYDRAULIC CONTROL DEVICES
IT2732372A IT963281B (en) 1971-07-23 1972-07-22 IMPROVEMENTS IN OR RELATING TO CONTROLS FOR HYDRAULIC ACTUATORS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3455771 1971-07-23
GB2172572A GB1361680A (en) 1971-07-23 1972-05-10 Hydraulic actuator controls

Publications (1)

Publication Number Publication Date
GB1361680A true GB1361680A (en) 1974-07-30

Family

ID=26255483

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2172572A Expired GB1361680A (en) 1971-07-23 1972-05-10 Hydraulic actuator controls

Country Status (5)

Country Link
AU (1) AU4477272A (en)
DE (1) DE2235788A1 (en)
FR (1) FR2147119B2 (en)
GB (1) GB1361680A (en)
IT (1) IT963281B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021742A2 (en) * 1979-06-15 1981-01-07 Sperry Corporation Hydraulic actuator control
GB2252181A (en) * 1991-01-25 1992-07-29 Linde Ag A hydraulic drive system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN169096B (en) * 1987-06-12 1991-09-07 Int Control Automation Finance
FR2661458B1 (en) * 1990-04-27 1992-07-03 Bendix Europ Services Tech CONTROL CIRCUIT FOR A DOUBLE ACTING HYDRAULIC CYLINDER AND DRAWER FOR SUCH A CIRCUIT.
DE102009058406A1 (en) * 2009-12-15 2011-06-16 Robert Bosch Gmbh Charge detection system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021742A2 (en) * 1979-06-15 1981-01-07 Sperry Corporation Hydraulic actuator control
EP0021742A3 (en) * 1979-06-15 1981-05-27 Sperry Corporation Improvements in or relating to hydraulic actuator controls
GB2252181A (en) * 1991-01-25 1992-07-29 Linde Ag A hydraulic drive system
FR2672090A1 (en) * 1991-01-25 1992-07-31 Linde Ag HYDRAULIC DRIVE SYSTEM, IN PARTICULAR FOR AN EXCAVATOR.
GB2252181B (en) * 1991-01-25 1994-10-26 Linde Ag A hydraulic drive system

Also Published As

Publication number Publication date
IT963281B (en) 1974-01-10
FR2147119A2 (en) 1973-03-09
AU4477272A (en) 1974-01-24
DE2235788A1 (en) 1973-02-08
FR2147119B2 (en) 1977-05-27

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Legal Events

Date Code Title Description
PS Patent sealed