US3439579A - Device for releasing or producing hydraulic pressure in a chamber - Google Patents

Device for releasing or producing hydraulic pressure in a chamber Download PDF

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Publication number
US3439579A
US3439579A US638117A US3439579DA US3439579A US 3439579 A US3439579 A US 3439579A US 638117 A US638117 A US 638117A US 3439579D A US3439579D A US 3439579DA US 3439579 A US3439579 A US 3439579A
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US
United States
Prior art keywords
chamber
duct
valve member
motor
piloting
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 - Lifetime
Application number
US638117A
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English (en)
Inventor
Gabriel L Guinot
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.)
Poclain SA
Original Assignee
Poclain SA
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 Poclain SA filed Critical Poclain SA
Application granted granted Critical
Publication of US3439579A publication Critical patent/US3439579A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F16H—GEARING
    • F16H43/00—Other fluid gearing, e.g. with oscillating input or output
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/24—Operating devices
    • B66D5/26—Operating devices pneumatic or hydraulic
    • 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
    • F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/28—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged apart from the brake
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/03—Mechanisms with latches or braking devices in general for capstans, hoists or similar devices as well as braking devices actuated electrically or by fluid under pressure
    • B66D2700/035—Fluid operated braking devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2544—Supply and exhaust type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2564—Plural inflows
    • Y10T137/2567—Alternate or successive inflows

Definitions

  • Two single-acting piloting rams are associated with the valve member of the control valve.
  • the rams are adapted to operate the valve to bring the annular chamber into communication with the pressurized fluid source.
  • the supply conduits of the reversible motor each are connected to a cylinder of one of the singleacting rams and connected jointly to the intermediate chamber through two nonreturn valves opening towards said intermediate chamber.
  • a spring and piston are provided for returning the valve member into the position in which the annular chamber communicates with the duct to atmosphere.
  • This invention relates to a device for releasing or producing hydraulic pressure in a chamber associated with a reversible hydraulic motor supplied selectively with pressure fiuid by two conduits.
  • a reversible hydraulic motor which can be driven selectively in one of two opposite directions by pressure fluid supplied through two conduits, the motor being associated with a chamber, which can either be connected to a vent of supplied with fluid through said conduits, is already known.
  • An example of apparatus of this kind is an hydraulic winch whose reversible motors are associated with a ram for releasing a safety brake, the hydraulic cylinder of which forms the aforementioned chamber.
  • Braking must cease, or in other words the pressure must be produced in the brake ram cylinder as soon as the motor is driven in one direcion or the other.
  • braking must occur, or in other words the ram cylinder must be connected to the vent, when the motor ceases to be driven.
  • None of these devices meets all the following conditions which are desirable for completely reliable operation: absence of communication between the two conduits of the reversible hydraulic circuit terminating at the motor; and the possibility of using diflferent fluid pressures for driving the motor in different directions and for operating simultaneously, the cylinder of the brake-releasing ram.
  • the invention consists of a device for releasing or producing hydraulic pressure in a chamber associated with a reversible hydraulic motor supplied selectively with pressurized fluid by two conduits,
  • the device comprising a control valve having an outlet connected to the chamber and an intermediate compartment communicating with a vent to atmosphere and with a source of pressurized fluid, wherein the two singleacting pilot rams associated with the valve member of the control valve operate the valve to bring the chamber into communication with the pressurized fluid source, the supply conduits of the reversible motor each being connected to a cylinder of one of the single-acting rams and both being connected jointly to the intermediate compartment through two nonreturn valves opening towards said intermediate compartment means being provided for returning the valve member into the position in which the chamber communicates with the vent to atmosphere.
  • one of the ends of the valve member is repelled by a spring while the piston of one of the rams is connected to the other end of the said valve member, the piston of the other of the rams axially engaging the first piston.
  • a control valve body 1 contains a sliding valve member 2 through which a duct 3 communicates with a duct 4 in the position shown in the drawing.
  • the duct 3 is connected through a pipe to the cylinder of an hydraulic ram A for releasing the safety brake of an hydraulic winch B, while the duct 4 is connected to the low pressure return side of the hydraulic installation.
  • the cylinder of the ram A forms the aforementioned chamber associated with the reversible motor, which in this case is the hydraulic motor of the winch B.
  • the motor can be supplied selectively with pressurized fluid from a source S by a distributor C through one or the other of the two conduits 25 and 26 which are themselves connected together near the motor by a speed limiter D.
  • a duct 5 provided in the valve body 1 is connected to one of. the conduits 2-5 of the reversible hydraulic circuit supplying the winch motor, another duct 6 provided in the valve body 1 being connected to the other conduit 26 of said reversible circuit.
  • the duct 5 extends to a piloting chamber 7 disposed around the same axis as the valve member 2.
  • the chamber 7 is extended in the direction of the valve member 2 by a bore 8 which terminates in an intermediate chamber 9.
  • One end 2a of the valve member 2 extends into the intermediate chamber 9.
  • a piston or piloting ram connected to the end 2a of the valve member 2 extends through the bore 8 and enters the piloting chamber 7.
  • a duct 11 connects the duct 5 to the intermediate chamber 9.
  • a nonreturn valve 12 mounted in the duct 11 allows pressure fluid to flow towards the chamber 9 but prevents it flowing in the opposite direction.
  • the duct 6 terminates in a second piloting cham ber 13, which is connected by a duct 14, in which a nonreturn valve 15- is mounted, to the intermediate chamber 9.
  • the chamber 13 is connected by a bore 16 to the chamber 7, and a piston or piloting ram 17 which can bear against the piston 10 is slidable in the bore 16 and extends into the chamber 13.
  • the chambers 7, 13 and the corresponding pistons 10, 17 form the single acting pilot rams mentioned hereinbefore.
  • the intermediate chamber 9 is extended by a bore 18 in which the valve member 2 is slidable and in the center of which is an annular chamber 19 to which the duct 3 is connected. Beyond the bore 18 is an internal space 20 to which the duct 4 is connected and in which the end 212 of the valve member 2 bears against a pusher 21 loaded by a compression spring 22.
  • the spring 22 bears against a seat 23 the position of which can be adjusted axially by means of a screw 24 which extends through the end wall of the valve body 1.
  • the device according to the invention operates as follows:
  • the jack A whose cylinder is connected to the duct 3, must be fed with pressurized fluid to release the winch safety brake when pressurized fluid is delivered to one or the other of the conduits 25 or 26 of the reversible circuit of the motor driving the winch.
  • fluid passes through the duct 5 into the piloting chamber 7 (when the winch cable is to be wound in) or through the duct 6 to the piloting chamber 13 (when the winch cable is to be unwound).
  • each iston 10 or 17 is connected to the valve member 2, since any movement towards the left, 'With reference to the drawing, of a piston 10 or 17 causes an equal displacement of the valve member 2 in the same direction.
  • the piston 10 is rigidly connected to the valve member 2.
  • the piston 17 acts on the valve member 2 through the piston 10.
  • the intermediate chamber 9 acts as the normal inlet chamber for the pressurized fluid in a sliding control valve.
  • the chamber 9 has no direct communicating duct terminating at the external surface of the valve body 1, and is connected to the fluid source through the piloting chambers 7, 17 and the nonreturn valves 12, 15.
  • the piloting chambers 7 and 13 are permanently isolated from one another, as are the two conduits 25 and 26 of the motor circuit, one connected to the duct 5 and the other to the duct 6. In these conditions it is possible to use different pressures for feeding the winch motor in different directions, the higher pressure corresponding to the winding-in of the winch cable and the lower pressure to its unwinding. In that case, as can be seen in the drawing, the pistons 10 and 17 have unequal effective diameters.
  • the pistons 10*, 17 and the valve member 2 can be returned into the position in which the duct 3 connected to the brake releasing ram is in communication with the venting duct 4 independently of the pressure in the ram and in the intermediate chamber 9. As soon as the pressure in the piloting chambers 7, 13 is inadequate to repel the spring 22, the device returns to the position illustrated, namely a safety position in which the brake is applied.
  • a device for releasing or producing hydraulic pressure in a chamber associated with a reversible hydraulic motor supplied selectively with pressurized fluid by two conduits comprising a control valve having an outlet connected to the chamber, an intermediate chamber, said chamber communicating with a duct to atmosphere and with a source of pressurized fluid, wherein two single acting piloting rams are associated with a valve member of the control valve, said rams being adapted to operate the valve member to bring the chamber into communication with the pressurized fluid source, the supply conduits of the reversible motor each being connected to a piloting chamber of one of the single acting rams and both being connected jointly to the intermediate chamber through two nonreturn valves opening towards said intermediate chamber means being provided for returning the valve member into the position in which the chamber communicates with the duct to atmosphere.
  • a device for releasing or producing hydraulic pressure in a chamber associated with a reversible hydraulic motor supplied selectively with pressurized fluid by two conduits comprising a control valve having an outlet connected to the chamber, an intermediate chamber, said chamber communicating with a duct to atmosphere and with a source of pressurized fluid, wherein a pair of piloting chambers each include a single acting piloting ram, said piloting rams having different diameters and being associated with a valve member of the control valve, said rams being adapted to operate the valve member to bring the chamber into communication with the pressurized fluid source, the supply conduits of the reversible motor each being connected to one of the said piloting chambers for one of said single acting rams and both being connected jointly to the intermediate chamber through two non-return valves opening towards said intermediate chamber, means being provided for returning the valve member into the position in which the chamber communicates with the duct to atmosphere.
  • a device for releasing or producing hydraulic pres sure in a chamber associated with a reversible hydraulic motor supplied selectively with pressurized fluid by two conduits comprising a control valve having an outlet connected to the chamber, an intermediate chamher, said chamber, communicating with a duct to atmosphere and with a source of pressurized fluid, wherein two single acting piloting rams having different diameters are associated with a valve member of the control valve, said rams being adapted to operate the valve member and bring the chamber into communication with the pressurized fluid source, the supply conduits of the reversible motor each being connected to a piloting chamber of one of the single acting rams and both being connected jointly to the intermediate chamber through two nonreturn valves opening towards said intermediate chamber, means being provided for returning the valve member into the position in which the chamber communicates with the duct to atmosphere, said return means comprising a spring which bears against a displaceable member, the position of which is adjustable.

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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)
US638117A 1966-05-13 1967-05-12 Device for releasing or producing hydraulic pressure in a chamber Expired - Lifetime US3439579A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR61427A FR1487372A (fr) 1966-05-13 1966-05-13 Dispositif de pilotage double d'un distributeur

Publications (1)

Publication Number Publication Date
US3439579A true US3439579A (en) 1969-04-22

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ID=8608542

Family Applications (1)

Application Number Title Priority Date Filing Date
US638117A Expired - Lifetime US3439579A (en) 1966-05-13 1967-05-12 Device for releasing or producing hydraulic pressure in a chamber

Country Status (5)

Country Link
US (1) US3439579A (fr)
DE (1) DE1600893C3 (fr)
ES (1) ES340405A1 (fr)
FR (1) FR1487372A (fr)
GB (1) GB1135308A (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3589482A (en) * 1969-11-05 1971-06-29 Corinth Machinery Co Inc Air operated motor and brake with modulating control system
US3631944A (en) * 1970-07-16 1972-01-04 Hobson Ltd H M Plural drive with differential brakes
US3678954A (en) * 1969-09-09 1972-07-25 Itt Control valve
US3720221A (en) * 1969-10-21 1973-03-13 Caterpillar Tractor Co High pressure implement hydraulic circuit
US3759357A (en) * 1972-03-23 1973-09-18 Caterpillar Tractor Co Brake saver circuit
US3871714A (en) * 1972-08-19 1975-03-18 Orenstein & Koppel Ag Fluid motor drive for lifting device such as a winch with accumulated pressure starting after brake release
US4045083A (en) * 1975-02-28 1977-08-30 Coal Industry (Patents) Limited Longwall mining machine with haulage motor sensed pressure controlled rail brake
US4187871A (en) * 1978-02-13 1980-02-12 The United States Of America As Represented By The Secretary Of The Navy Pressure-biased shuttle valve
US4396345A (en) * 1981-05-07 1983-08-02 Ingersoll-Rand Company Unloader valve having bypass valving means
US4502836A (en) * 1982-07-02 1985-03-05 Swearingen Judson S Method for nozzle clamping force control

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2194893B1 (fr) * 1973-03-20 1975-10-31 Poclain Sa
DE2706572C2 (de) * 1977-02-16 1982-10-07 Elektro-Mechanik Gmbh, 5963 Wenden Servoventil mit hydrostatisch gelagertem Drehschieber
GB2033511B (en) * 1978-11-10 1982-09-02 Coal Industry Patents Ltd Brake control equipment for a vehicle with drive means
GB2082227B (en) * 1980-08-15 1984-03-07 Coal Industry Patents Ltd Brake equipment for underground mining machines

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2730994A (en) * 1953-02-24 1956-01-17 Gen Motors Corp Actuator control system and valve mechanism therefor
US2831554A (en) * 1951-07-30 1958-04-22 Ingersoll Rand Co Control device for hoists
US3249336A (en) * 1963-06-18 1966-05-03 Baldwin Lima Hamilton Corp Hydraulic winch control mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2831554A (en) * 1951-07-30 1958-04-22 Ingersoll Rand Co Control device for hoists
US2730994A (en) * 1953-02-24 1956-01-17 Gen Motors Corp Actuator control system and valve mechanism therefor
US3249336A (en) * 1963-06-18 1966-05-03 Baldwin Lima Hamilton Corp Hydraulic winch control mechanism

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678954A (en) * 1969-09-09 1972-07-25 Itt Control valve
US3720221A (en) * 1969-10-21 1973-03-13 Caterpillar Tractor Co High pressure implement hydraulic circuit
US3589482A (en) * 1969-11-05 1971-06-29 Corinth Machinery Co Inc Air operated motor and brake with modulating control system
US3631944A (en) * 1970-07-16 1972-01-04 Hobson Ltd H M Plural drive with differential brakes
US3759357A (en) * 1972-03-23 1973-09-18 Caterpillar Tractor Co Brake saver circuit
US3871714A (en) * 1972-08-19 1975-03-18 Orenstein & Koppel Ag Fluid motor drive for lifting device such as a winch with accumulated pressure starting after brake release
US4045083A (en) * 1975-02-28 1977-08-30 Coal Industry (Patents) Limited Longwall mining machine with haulage motor sensed pressure controlled rail brake
US4187871A (en) * 1978-02-13 1980-02-12 The United States Of America As Represented By The Secretary Of The Navy Pressure-biased shuttle valve
US4396345A (en) * 1981-05-07 1983-08-02 Ingersoll-Rand Company Unloader valve having bypass valving means
US4502836A (en) * 1982-07-02 1985-03-05 Swearingen Judson S Method for nozzle clamping force control

Also Published As

Publication number Publication date
FR1487372A (fr) 1967-07-07
GB1135308A (en) 1968-12-04
ES340405A1 (es) 1968-10-01
DE1600893C3 (de) 1978-03-09
DE1600893B2 (de) 1977-07-21
DE1600893A1 (de) 1971-02-25

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