GB944167A - Improvements in or relating to hydraulic circuits - Google Patents

Improvements in or relating to hydraulic circuits

Info

Publication number
GB944167A
GB944167A GB758260A GB758260A GB944167A GB 944167 A GB944167 A GB 944167A GB 758260 A GB758260 A GB 758260A GB 758260 A GB758260 A GB 758260A GB 944167 A GB944167 A GB 944167A
Authority
GB
United Kingdom
Prior art keywords
piston
valve
spool
flow
bores
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
GB758260A
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.)
HEINZ TEVES
Original Assignee
HEINZ TEVES
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 HEINZ TEVES filed Critical HEINZ TEVES
Publication of GB944167A publication Critical patent/GB944167A/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
    • 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
    • F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation 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
    • 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
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/05—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
    • F15B11/055—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive by adjusting the pump output or bypass
    • 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
    • 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
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
    • 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
    • F15B2211/31—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
    • F15B2211/321—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
    • F15B2211/40—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
    • F15B2211/415—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
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41554—Flow control characterised by the connections of the flow control means in the circuit being connected to a return line 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
    • F15B2211/421—Flow control characterised by the type of actuation mechanically
    • F15B2211/423—Flow 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
    • F15B2211/40—Flow control
    • F15B2211/465—Flow control with pressure compensation
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5157—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a return line
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/528—Pressure 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
    • F15B2211/50—Pressure control
    • F15B2211/57—Control of a differential pressure

Abstract

944,167. Valves. H. TEVES, E. A. TEVES, and M. TAUNSEND, [trading as ALFRED TEVES MASCHINENUND ARMATUREN FABRIK KOMM. GES.]. March 3, 1960 [March 3, 1959], No. 7582/60. Heading F2V. [Also in Division F1] An hydraulic system comprises a multipleway piston valve 2, Fig. 2, and flow-throttling means 3 co-operating with a pilot piston valve 5 which is disposed in a line connecting the multiple-way valve and a motor 1 to a pressure source 9 or a tank 10. The throttling means is hydraulically connected to opposed faces 12, 13 of the pilot piston valve 5 and mechanically connected to the spool of the multiple-way valve 2. When the multiple-way valve 2 is in its neutral position, the throttling means is positioned so as not to restrict the flow of fluid therethrough so that the pressure acting on the opposed faces 12, 13 is equal and the piston is urged to a position by a spring 6 wherein the flow from the valve 2 is unrestricted and passes to the tank 10. When the spool of the valve is manually moved in one direction or the other from its neutral position, the throttling means 3 is also moved to close a main passage and gradually open a restricted passage to apply a pressure differential across the piston 5 which moves to control the flow to the tank in such a way that the piston of the motor 1 moves at a constant speed. The throttling means and pilot piston valve may be in the supply line from the pressure source, which may be a pump or accumulator, to the multiple-way valve, or the throttling means may be in the return line and the pilot piston valve control a by-pass line from the pump to the tank. Excess pressure is relieved by a valve 11. The multiple-way valve 2, throttling means 3 and pilot piston valve 5 may be incorporated in a housing 18, Fig. 5, having a bore 24 connected by a line 34 to the pump 9, and lines 32, 33 to the motor 1. The spool 25 of the multiple-way valve is movable in the bore by a linkage 35 to selectively connect the pump to one side or the other of the motor and is formed with a sleeve 49 slidable on a stationary member 20, the sleeve having orifices 46, 47, 48, which co-operate with bores 54 in the member 20 to form the throttling means 3. The piston 5 is hollow, slidable in the spool 25, and urged against a circlip 40 by a spring 6. The piston has bores 41 communicating with bores 43 on the spool 25 and a groove 31 in the bore 24. In the neutral position shown, the fluid from the pump passes through the line 34 to the groove 31, through the bores 41, 43 to the interior of the piston 5 and member 20, through bores 54 and orifices 46, which do not restrict the flow, into a chamber 19 and through ports 45 to the return line 8 leading to the tank 10. The pressure in the chamber 19 is communicated by a chamber 22, line 23, chamber 21 and ports 39 to the face 13 of the piston 5, and, since the pressure on the face 13 is equal to that on the face 12, the spring 6 maintains the piston against the circlip and the piston does not control the flow of fluid. Movement of the spool 25 by the linkage 35 in one direction or the other, connects the pump to one side of the motor, the discharge from the other side passing through the groove 31 and bores 41, 43 to the interior of the piston 5 and member 20 and through the bores 54 and the orifices 47 or 48, depending on the direction of movement of the spool. The orifices 47, 48 are formed in a spiral on the sleeve 49 and restrict the flow of fluid to the chamber 19 and line 8 by an amount depending on the degree of movement of the spool 25. The consequent reduction in pressure in chamber 19 is communicated to the face 13 of the piston 5 and the resulting pressure differential across the piston moves the latter against the spring 6 so as to control the flow of fluid from the motor and maintain the movement of the piston constant.
GB758260A 1959-03-03 1960-03-03 Improvements in or relating to hydraulic circuits Expired GB944167A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET16342A DE1108996B (en) 1959-03-03 1959-03-03 Control for pressure medium consumer

Publications (1)

Publication Number Publication Date
GB944167A true GB944167A (en) 1963-12-11

Family

ID=7548214

Family Applications (1)

Application Number Title Priority Date Filing Date
GB758260A Expired GB944167A (en) 1959-03-03 1960-03-03 Improvements in or relating to hydraulic circuits

Country Status (2)

Country Link
DE (1) DE1108996B (en)
GB (1) GB944167A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0064332A1 (en) * 1981-04-03 1982-11-10 J.C. Bamford Excavators Limited A fluid control valve and a fluid control system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1197705B (en) * 1962-06-05 1965-07-29 Danfoss As Automatic pressure regulator with a sliding piston
DE3434014A1 (en) * 1984-09-15 1986-03-20 Beringer-Hydraulik GmbH, Neuheim, Zug HYDRAULIC CONTROL
DE10039936A1 (en) * 2000-08-16 2002-03-07 Fluidtech Gmbh Valve

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE108082C (en) *
US2264375A (en) * 1939-05-16 1941-12-02 Air Assoclates Inc Unloading valve
US2608824A (en) * 1947-08-27 1952-09-02 New York Air Brake Co Control valve
US2578795A (en) * 1948-10-13 1951-12-18 Vickers Inc Relief valve
DE1754756U (en) * 1953-01-10 1957-10-24 Ehrenreich & Cie A AUTOMATIC PRESSURE REGULATING VALVE.
CH325222A (en) * 1953-04-17 1957-10-31 Bosch Gmbh Robert Hydraulic lifting system, in particular for vehicles
DE1745083U (en) * 1954-07-08 1957-05-16 Bosch Gmbh Robert CONTROL UNIT FOR HYDRAULIC SYSTEMS.
US2924239A (en) * 1954-08-13 1960-02-09 Rockford Machine Tool Co Servo valve having helically arranged metering ports
DE1018311B (en) * 1954-09-17 1957-10-24 Smil Reis Device for automatic regulation of the delivery rate of a pump
DE1756100U (en) * 1954-11-29 1957-11-14 Hobourn Eaton Mfg Company Ltd VALVE UNIT.
IT649884A (en) * 1959-01-27 1900-01-01

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0064332A1 (en) * 1981-04-03 1982-11-10 J.C. Bamford Excavators Limited A fluid control valve and a fluid control system

Also Published As

Publication number Publication date
DE1108996B (en) 1961-06-15

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