US3173257A - Self-contained electro-hydraulic actuating device - Google Patents

Self-contained electro-hydraulic actuating device Download PDF

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Publication number
US3173257A
US3173257A US285021A US28502163A US3173257A US 3173257 A US3173257 A US 3173257A US 285021 A US285021 A US 285021A US 28502163 A US28502163 A US 28502163A US 3173257 A US3173257 A US 3173257A
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United States
Prior art keywords
jack
pump
motor
chambers
piston
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Expired - Lifetime
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US285021A
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English (en)
Inventor
Lucien Rene
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.)
Recherches Etudes Production REP SARL
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Recherches Etudes Production REP SARL
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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
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/005—With rotary or crank input
    • F15B7/006—Rotary pump input
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/18—Combined units comprising both motor and pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices

Definitions

  • the invention relates to an electro-hydraulic device permitting the operation of a servo-control of any kind, for example of an isolating gate-valve, by means of a double-acting jack supplied from an electro-pump.
  • the jack and the electro-pump with its associated structure form a self-contained, portable unit that can be brought to and mounted on the apparatus to be controlled exactly as it is, Furthermore, the hydraulic supply and safety devices are combined together in an adaptable unit, which can be suitably orientated irrespective of the position which the apparatus to be controlled imposes on the jack.
  • FIG. 1 is a general view in elevation of the electrohydraulic actuating device.
  • FIG. 2 shows to a larger scale and in a relative arrangement arbitrarily chosen for convenience of the description, the jack, the electro-pump with its accessories and the hydraulic circuit.
  • IiIG. 3 is a view in cross-section of a detail, to a larger sca e.
  • a support 1 which is fixed on the apparatus to be controlled (not shown) comprises two securing flanges 1a, 1b at right angles. One of these, receives a double-acting jack 2, the rod T of which will be coupled to that of the apparatus to be controlled.
  • the other flange 111 has secured thereto a unit casing 3 which houses or supports all the other hydraulic members. This arrangement makes it possible, by virtue of the two degrees of freedom of the attachment, to give the casing the most suitable orientation, irrespective of the orientation of the jack.
  • This locking device is provided with a mechanical locking device for its rod in its two extreme positions.
  • This locking device may be of any appropriate kind, for example of the claw type.
  • the jack has the particular feature that its piston 4 is coupled to the rod T through the intermediary of a spring 5, advantageously formed by a stack of elastic washers.
  • This coupling otters the two-fold advantage, on the one hand of maintaining on the rod, locked in its fully out position (the case of FIG. 2), a continuous force which ensures rigidity of the control, and on the other hand of permitting a certain latitude in the final position of the rod, which is often useful, especially in the control of wedge gates, when good fluid-tightness is required or when possible wear of the seats of these gates must be taken into account.
  • the jack is provided with an end-of-travel contact switch 6a6b, such as a microswitch the function of which will be explained later.
  • the two chambers of the jack are connected by conduits 7a-7b to the electro-hydraulic members from which they are supplied, and which are contained in the unit casing 3 or are supported thereby.
  • the motor M drives a pump 8 which is reversible, that is to say, when the direction of rotation of the pump is reversed, the delivery outlet becomes the suction inlet and vice versa.
  • This pump sucks the liquid from one chamber of liquid to the jack and delivers it into the other chamber.
  • this supply of liquid to the jack is controlled by various members which will now be described with reference to FIGS. 2 and 3.
  • each of these compensating valves is composed of a jacket 10 movable inside a body 11. In this jacket, provided with an opposing spring, there slides a diaphragm valve 12. A loss of pressure causes a displacement of the jacket, which compresses its spring and then closes return-circuit orifices 13 formed in the body 11.
  • Excess-pressure valves 14a-14b protect each of the two circuits.
  • the device comprises an emergency hand-pump 15, which has two separate deliveries 15a-15b corresponding respectively to the chambers of the jack.
  • a manual change-over switch 16 permits, through the intermediary of an eccentric 17, the closure of one or the other of two non-return valves 18a-18b, which are both held open during normal workmg.
  • An electro-hydraulic actuating device comprising a self-contained portable assembly forming a single unit adapted to be associated with a device to be controlled, said assembly comprising a double acting jack including a piston rod adapted for being connected to the device to be controlled, said jack including a piston defining two isolated and opposed chambers in the jack, means including an elastic connection between the rod and the piston, said elastic connection comprising a stack of elastic washers, the assembly further comprising a reversible motor, a pump driven by said motor, a hand pump and a hydraulic circuit connecting the motordriven pump, the jack and the hand pump, said hydraulic circuit including two compensation valves to correct the the jack and of possible leakages from the pumps, and two non-return valves permitting manual change Over of delivery to said jack from said pump driven by the motor and said hand pump, said hydraulic circuit further including a pair of conduits extending from the motordriven pump to the separate chambers of the jack to alternate the supply of pressure fluid to the chambers of the jack in accordance with
  • An electro-hydraulic actuating device wherein the hand pump develops a pressure which is greater than the pressure produced by the motordriven pump.
  • An electro-hydraulic actuating device according to claim 1, wherein said hydraulic circuit comprises an excess-pressure valve for controlling the pressure that has been developed by the hand pump.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Actuator (AREA)
US285021A 1962-06-02 1963-06-03 Self-contained electro-hydraulic actuating device Expired - Lifetime US3173257A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR899510A FR1337263A (fr) 1962-06-02 1962-06-02 Dispositif d'actionnement électro-hydraulique autonome

Publications (1)

Publication Number Publication Date
US3173257A true US3173257A (en) 1965-03-16

Family

ID=8780212

Family Applications (1)

Application Number Title Priority Date Filing Date
US285021A Expired - Lifetime US3173257A (en) 1962-06-02 1963-06-03 Self-contained electro-hydraulic actuating device

Country Status (5)

Country Link
US (1) US3173257A (fr)
CH (1) CH418143A (fr)
DE (1) DE1425842A1 (fr)
FR (1) FR1337263A (fr)
GB (1) GB1005253A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3301313A (en) * 1963-02-01 1967-01-31 Goetaverken Ab Hydraulic driving means for operating hatch covers
US3397620A (en) * 1966-10-06 1968-08-20 Milwaukee Cylinder Corp Fluid actuator with annular piston locking means
US3893298A (en) * 1974-03-25 1975-07-08 Us Navy Single-stroke cartridge actuated device
US3995534A (en) * 1973-06-30 1976-12-07 Adolf Rastetter Safety arrester for arresting a hydraulically operated lifting ram of a hydraulic elevator

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815361A (en) * 1971-03-22 1974-06-11 G Manini Device for operating hinged closures
DE3730808A1 (de) * 1987-09-14 1989-03-23 Heb Hydraulik Elementebau Gmbh Verriegelungsvorrichtung fuer hydraulische oder pneumatische arbeitszylinder
FR2687206B1 (fr) * 1992-02-12 1995-06-16 Berruyer Jean Jacques Dispositif de commande pour vannes.
CN104161114B (zh) * 2014-08-14 2016-09-28 江苏丘陵地区镇江农业科学研究所 一种猕猴桃的后熟处理方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1616841A (en) * 1925-11-18 1927-02-08 Western Gas Construction Co Motor-operated gate valve
US2255878A (en) * 1938-11-25 1941-09-16 Associated Manufacturers Agenc Crossing gate lock
US2349244A (en) * 1942-02-26 1944-05-23 Bendix Aviat Ltd Actuating cylinder
US2927429A (en) * 1958-05-01 1960-03-08 Carlson Martin Reversible hydraulic door operator system
US2944525A (en) * 1957-01-25 1960-07-12 Sophie A Fagge Fixture-mounted spot welding gun

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1616841A (en) * 1925-11-18 1927-02-08 Western Gas Construction Co Motor-operated gate valve
US2255878A (en) * 1938-11-25 1941-09-16 Associated Manufacturers Agenc Crossing gate lock
US2349244A (en) * 1942-02-26 1944-05-23 Bendix Aviat Ltd Actuating cylinder
US2944525A (en) * 1957-01-25 1960-07-12 Sophie A Fagge Fixture-mounted spot welding gun
US2927429A (en) * 1958-05-01 1960-03-08 Carlson Martin Reversible hydraulic door operator system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3301313A (en) * 1963-02-01 1967-01-31 Goetaverken Ab Hydraulic driving means for operating hatch covers
US3397620A (en) * 1966-10-06 1968-08-20 Milwaukee Cylinder Corp Fluid actuator with annular piston locking means
US3995534A (en) * 1973-06-30 1976-12-07 Adolf Rastetter Safety arrester for arresting a hydraulically operated lifting ram of a hydraulic elevator
US3893298A (en) * 1974-03-25 1975-07-08 Us Navy Single-stroke cartridge actuated device

Also Published As

Publication number Publication date
DE1425842A1 (de) 1969-04-30
GB1005253A (en) 1965-09-22
CH418143A (fr) 1966-07-31
FR1337263A (fr) 1963-09-13

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