GB845867A - Improvements in or relating to hydraulic operating systems - Google Patents

Improvements in or relating to hydraulic operating systems

Info

Publication number
GB845867A
GB845867A GB3518555A GB3518555A GB845867A GB 845867 A GB845867 A GB 845867A GB 3518555 A GB3518555 A GB 3518555A GB 3518555 A GB3518555 A GB 3518555A GB 845867 A GB845867 A GB 845867A
Authority
GB
United Kingdom
Prior art keywords
pump
restriction
valves
restrictions
additional services
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
GB3518555A
Inventor
George Orloff
Alan Cameron-Johnson
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.)
British Messier Ltd
Original Assignee
British Messier 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 British Messier Ltd filed Critical British Messier Ltd
Priority to GB3518555A priority Critical patent/GB845867A/en
Publication of GB845867A publication Critical patent/GB845867A/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
    • 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
    • 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40576—Assemblies of multiple valves
    • F15B2211/40592—Assemblies of multiple valves with multiple valves in parallel flow paths
    • 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
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41509—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a 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
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow 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
    • F15B2211/40—Flow control
    • F15B2211/455—Control of flow in the feed line, i.e. meter-in control
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

845,867. Reciprocating pumps. BRITISH MESSIER Ltd. Dec. 4, 1956 [Dec. 7, 1955], No. 35185/55. Class 102(1). [Also in Group XXIX] In a hydraulic system in which a variable delivery pump constantly supplies liquid to a circuit feeding intermittently operating hydraulic units and also supplies liquid when required to one or more additional services, each of which can be brought into operation by means of its own selector valve, means, are provided for varying the delivery of the pump in accordance with the pressure fluid requirements of the system. As shown in Fig. 1, a swash-plate pump 11 (of which only one cylinder 14 is shown) supplies liquid through a line 19 to a hydraulic system, line 19 also being connected to additional services 21, 22, 23 through branch lines controlled by selector valves 27, 28, 29. Line 19 contains a restriction 20 and has restrictions 45, 48, 49 controlled by valves 36, 37, 38 and connected in parallel with restriction 20. When selector valves 27, 28, 29 are closed, valves 36, 37, 38 are also closed, and the pump output passes through restriction 20. The pressure drop across this restriction is applied to a servo motor piston 52 which controls the position of spill control rings 18 associated with the pump cylinders. Rings 18 are moved to the left to give minimum output from the pump. Operation of a selector valve 27, 28 or 29 opens the associated valve 36, 37 or 38 and the pump discharge passes through the associated restriction in addition to restriction 20. The pressure drop thus decreases and the servo piston 52 is moved to the right to increase the pump output. In a modification, Fig. 2, a servo piston 131 controlling the output of a swash-plate pump is subject to the pressure drop across parallel connected restrictions 125, 126, 127, 128; restrictions 126, 127, 128 being disposed in lines controlled by valves 144, 145, 146, controlled in turn by selector valves 141, 142, 143, controlling the operation of the additional services. The servo piston 131 controls the position of spill control rings 119 co-operating with ports formed in the pump pistons. In addition to the unloading of the pump when none of the additional services are in operation, an over balance control valve 165 is provided which moves the servo piston to its unloading position when the pressure downstream of the restrictions is excessive.
GB3518555A 1955-12-07 1955-12-07 Improvements in or relating to hydraulic operating systems Expired GB845867A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3518555A GB845867A (en) 1955-12-07 1955-12-07 Improvements in or relating to hydraulic operating systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3518555A GB845867A (en) 1955-12-07 1955-12-07 Improvements in or relating to hydraulic operating systems

Publications (1)

Publication Number Publication Date
GB845867A true GB845867A (en) 1960-08-24

Family

ID=10374833

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3518555A Expired GB845867A (en) 1955-12-07 1955-12-07 Improvements in or relating to hydraulic operating systems

Country Status (1)

Country Link
GB (1) GB845867A (en)

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