GB689312A - Improvements in or relating to hydraulic servo control systems - Google Patents

Improvements in or relating to hydraulic servo control systems

Info

Publication number
GB689312A
GB689312A GB977749A GB977749A GB689312A GB 689312 A GB689312 A GB 689312A GB 977749 A GB977749 A GB 977749A GB 977749 A GB977749 A GB 977749A GB 689312 A GB689312 A GB 689312A
Authority
GB
United Kingdom
Prior art keywords
piston
valve
cylinder
pressure liquid
aircraft
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
GB977749A
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.)
ARTHUR PHILLIP GLENNY
Sperry Gyroscope Co Ltd
Original Assignee
ARTHUR PHILLIP GLENNY
Sperry Gyroscope Co 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 ARTHUR PHILLIP GLENNY, Sperry Gyroscope Co Ltd filed Critical ARTHUR PHILLIP GLENNY
Priority to GB977749A priority Critical patent/GB689312A/en
Publication of GB689312A publication Critical patent/GB689312A/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
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • 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
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-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
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the 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
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/322—Directional control characterised by the type of actuation mechanically actuated by biasing means, e.g. spring-actuated
    • 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
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/895—Manual override

Landscapes

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

Abstract

689,312. Fluid-pressure servomotor-control systems. GLENNY, A. P., SPENCER, D. L., and SPERRY GYROSCOPE CO., Ltd. March 31, 1950 [April 11, 1949], No. 9777/49. Class 135. A hydraulic servo-control system applicable, e.g. to an automatic system for controlling the direction of flight or the attitude of an aircraft, comprises a power piston 4 connected to a control surface of the aircraft, the opposite sides of the piston being interconnected through a by-pass controlled by a ball valve 11, and the opposite ends of the cylinder 1 connected through pipes 2, 3 to a pressure liquid supply valve 6. The pipe 3 has a waste ball valve 10. Thus, if the supply through the pipe 3 fails the valve 11 opens the by-pass and the valve 10 opens to connect the lower end of the cylinder to waste. The flow of pressure liquid to the pipe 2 is regulated by a control valve 7 connected by a wire 7a to a pulley 8 mounted upon a shaft connected to a constantly-driven motor through an electromagneticallycontrolled friction clutch, the current to which is regulated according to the deviation of the aircraft from its desired position. When the valve 7 is raised, pressure liquid flows to the upper end of the cylinder and moves the piston downwards by virtue of the greater area of the upper side of the piston exposed to liquid pressure. Downward movement of the valve 7 opens the upper end of the cylinder to waste and, when the supply of pressure liquid fails, permits manual operation of the power piston 4. The sectional area of the piston rod may be about one-half of that of the piston. In a modification, a by-pass between the opposite sides of the piston is provided by arranging a definite clearance between the piston and the cylinder and providing the piston with a groove for a rubber sealing ring. This construction permits manual operation of the piston.
GB977749A 1949-04-11 1949-04-11 Improvements in or relating to hydraulic servo control systems Expired GB689312A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB977749A GB689312A (en) 1949-04-11 1949-04-11 Improvements in or relating to hydraulic servo control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB977749A GB689312A (en) 1949-04-11 1949-04-11 Improvements in or relating to hydraulic servo control systems

Publications (1)

Publication Number Publication Date
GB689312A true GB689312A (en) 1953-03-25

Family

ID=9878564

Family Applications (1)

Application Number Title Priority Date Filing Date
GB977749A Expired GB689312A (en) 1949-04-11 1949-04-11 Improvements in or relating to hydraulic servo control systems

Country Status (1)

Country Link
GB (1) GB689312A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1230315B (en) * 1959-07-28 1966-12-08 Short Brothers & Harland Ltd Reversible hydraulic fluid piston motor
DE3301145A1 (en) * 1983-01-14 1984-07-26 Emil Dautel GmbH, 7105 Leingarten Elevating gate with unidirectional hydraulic cylinder
GB2232791A (en) * 1989-05-22 1990-12-19 Kugelfischer G Schaefer & Co A pressure modulator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1230315B (en) * 1959-07-28 1966-12-08 Short Brothers & Harland Ltd Reversible hydraulic fluid piston motor
DE3301145A1 (en) * 1983-01-14 1984-07-26 Emil Dautel GmbH, 7105 Leingarten Elevating gate with unidirectional hydraulic cylinder
GB2232791A (en) * 1989-05-22 1990-12-19 Kugelfischer G Schaefer & Co A pressure modulator
GB2232791B (en) * 1989-05-22 1993-02-17 Kugelfischer G Schaefer & Co A pressure modulator

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