194results about "Accumulator installations" patented technology

The invention discloses a hydraulic system for preventing reversing cutoff of a cone valve type filling industrial pump. The hydraulic system comprises a first oil pump set, a second oil pump set, a main oil cylinder set, a first pressure valve suction valve oil cylinder set, a second pressure valve suction valve oil cylinder set, a reversing valve set and a pipeline. The first oil pump set is composed of a first oil pump, a second oil pump and a first constant-pressure oil pump set. The second oil pump set is composed of a third oil pump, a fourth oil pump and a second constant-pressure oil pump set. The first pressure valve suction valve oil cylinder set comprises a first pressure valve oil cylinder and a first suction valve oil cylinder, and the second pressure valve suction valve oil cylinder set comprises a second pressure valve oil cylinder and a second suction valve oil cylinder. The reversing valve group comprises first to sixth reversing valves. According to the reversing cutoff prevention hydraulic system of the cone valve type filling industrial pump, through unique structural design and assembly configuration, the cutoff problem in the reversing process is effectively solved, continuous and stable operation of the system is ensured, and the working efficiency and reliability of the industrial pump are improved.

A portable fluid tank system can include wireless control capabilities. The portable fluid tank system can include a fluid tank with an internal volume for fluid storage and a fluid actuation system for controlled fluid movement and pressurization. An electronics housing within the portable fluid tank system can accommodate a removable energy storage device, providing power to the actuation system. The portable fluid tank system can include a multi-state control interface, facilitating direct user interaction or remote operation via a wireless communication module. The module can receive and execute commands from a remote transmitting device, enabling remote activation and control of the fluid actuation system.

A dual-redundancy electro-hydrostatic actuator comprises a first motor pump and a second motor pump which are energy assemblies of the electro-hydrostatic actuator; the first motor pump and the second motor pump are respectively provided with a first electromagnetic isolating valve and a second electromagnetic isolating valve which are used for controlling connection and disconnection between the first motor pump and the hydraulic cylinder and between the second motor pump and the hydraulic cylinder; the energy accumulator is an oil supplementing assembly of the electro-hydrostatic actuator, provides stable pressure when the motor pump works at a high speed, and prevents the electro-hydrostatic actuator from sucking air; the one-way valve is located between the energy accumulator and the hydraulic cylinder, the energy accumulator supplies oil to the hydraulic cylinder through the one-way valve, and oil is prevented from reversely flowing back to the energy accumulator; the safety valve plays a role in limiting the maximum pressure of the electro-hydrostatic actuator, and the electro-hydrostatic actuator is prevented from being damaged due to the fact that the pressure exceeds the limit; the sensor is used for judging the working states of the first motor pump and the second motor pump of the electro-hydrostatic actuator, and after signals of the sensor are sent to the controller, the controller achieves fault diagnosis of the motor pumps and triggers updating of system state identifiers.

The mechanism in the invention provides a solution for automated, remote regulating high pressure air in the industrial air tube system. With double layer electromagnetic valves, the mechanism assure the comfortable and safe working platform for humans and equipment. The mechanism comprises: mechanical valve, 20 L pneumatic tank, pressure gauge, sealed metal box, static disc, electromagnetic relay with movable stem, capacitor, low pressure air tube, high pressure air tube, electrical wire, electromagnetic relay.

This working machine may comprise: a high pressure side; a low pressure side; a hydraulic machine configured to rotate and drive a load; an inlet valve configured to allow or block fluid communication between the high pressure side and an inlet side of the hydraulic machine; an outlet valve configured to allow or block fluid communication between an outlet side of the hydraulic machine and the low pressure side; and a control unit configured to perform hydraulic machine control to, if an actual differential pressure (ΔPact) of a differential pressure (ΔP = Ph- Pi) between a hydraulic pressure (Ph) on the high pressure side and a pressure (Pi) on the inlet side of the hydraulic machine becomes less than a preset reference differential pressure (ΔPref), increase the capacity of the hydraulic machine, and if the actual differential pressure becomes greater than the reference differential pressure, reduce the capacity of the hydraulic machine. In addition, the control unit may be configured to perform valve control to, if the actual rotational speed of the hydraulic machine becomes less than the required rotational speed of the hydraulic machine corresponding to a request input to an operator input device, increase the degree of opening of the inlet valve, and if the actual rotational speed becomes greater than the required rotational speed, reduce the degree of opening.

The invention relates to the technical field of hydraulic control, and discloses a loading oil cylinder hydraulic system of a loading vehicle, which comprises a motor pump set, a loading oil cylinder, an oil cylinder upper cavity energy accumulator set and an oil cylinder lower cavity energy accumulator set. The device is characterized in that a rodless cavity of the loading oil cylinder is communicated with the oil cylinder upper cavity energy accumulator group through an oil cylinder upper cavity loading pipeline; a rod cavity of the loading oil cylinder is communicated with the oil cylinder lower cavity energy accumulator set through an oil cylinder lower cavity loading pipeline. Under the dynamic working condition, the volume change of the two working cavities caused by the displacement of the loading oil cylinder piston is absorbed or compensated by the oil cylinder upper cavity energy accumulator group and the oil cylinder lower cavity energy accumulator group which are communicated with the loading oil cylinder piston, so that the fluctuation of the pressure in the two cavities is inhibited, and the stability of the output loading force is maintained. According to the invention, the stability of dynamic loading force when the loading vehicle runs on an uneven road surface can be obviously improved, and the accuracy of dynamic loading test is ensured.

This transport vehicle comprises a steering circuit including: a steering cylinder steered by hydraulic oil of a hydraulic pressure source; a steering valve that controls the flow of the hydraulic oil to the steering cylinder; and an accumulator that stores the hydraulic-oil pressure from the hydraulic pressure source and that can supply the pressure to the steering cylinder via the steering valve. The steering circuit is connected to the hydraulic pressure source and a hydraulic oil tank via a composite control valve. The composite control valve has: a first position at which communication is enabled between the steering circuit and the hydraulic pressure source and at which communication is shut-off between the steering circuit and the hydraulic oil tank; and a second position at which communication is enabled between the steering circuit and the hydraulic pressure source and at which communication is enabled between the steering circuit and the hydraulic oil tank. The composite control valve includes a narrowed section in an oil path that enables communication between the steering circuit and the hydraulic oil tank, at the second position.

The utility model relates to the technical field of inflation equipment, and discloses energy accumulator inflation equipment which comprises a cart, an energy accumulator inflation device, an energy accumulator inflation device and an energy accumulator inflation device, an energy accumulator and a nitrogen tank are clamped to the top of the cart and located on one side of the inflation device body; a mounting assembly is arranged at the top of the cart; the mounting assembly comprises a concave seat, a concave groove and a concave groove, wherein the concave seat is fixedly connected to the top of the cart; a first sliding block is connected into the concave base in a sliding mode. When the inflation device body needs to be disassembled and overhauled, a first sliding block can be pulled out from one side of the inflation device body only by rotating a first threaded sleeve, then locking universal wheels at the bottom of a cart and pulling a rod body, and therefore the inflation device body can be conveniently pulled out from the interior of a concave base, and when the inflation device body is installed, the inflation device body can be conveniently disassembled and overhauled. The inflation device body is inserted into the concave seat, and then the first threaded sleeve is rotated, so that the operation is simple, convenient and fast.

The invention relates to an improvement in the field of adjusting drives. To this end, inter alia, a failsafe drive (1) for adjusting drives is proposed, which has a drive accumulator (6) comprising at least one disc spring (7) and a cam disc (8) for converting an axial drive movement of a reset element into a rotary drive movement.

An annealing device for a metal strip (2) advancing in the longitudinal direction, said device comprising, in sequence: at least one preheating section (17); at least one heating section (3); at least one temperature maintenance section (4); at least one cooling section (23); wherein said at least one preheating section (17) comprises a plurality of heating rollers (16) for advancing said metal strip (2); wherein said at least one cooling section (23) comprises a plurality of cooling rollers (22) for advancing said metal strip (2), wherein a circuit of heat transfer fluid is provided, said circuit being configured to pass through the cooling rollers (22) of said at least one cooling section (23) in order to extract heat energy from the strip, thus obtaining a high-temperature heat transfer fluid, and through the heating rollers (16) of said at least one preheating section (17) in order to transfer heat energy to the strip, thus obtaining a low-temperature heat transfer fluid.

An active compensation hydraulic system for a crane includes a controller, a hydraulic pump assembly, a high-frequency response valve control assembly, a proportional control valve assembly, a first locking valve assembly, a second locking valve assembly, a control mode switching valve assembly, and an actuator. The high-frequency response valve control assembly includes a one-way solenoid ball valve, a high-frequency response valve, and a first bidirectional solenoid ball valve. The proportional control valve assembly includes a proportional directional valve and a second bidirectional solenoid ball valve. The first locking valve assembly includes a first two-way cartridge valve and a first balancing valve. The second locking valve assembly includes a second two-way cartridge valve, a second balancing valve, a first shuttle valve, and a first hydraulically controlled directional valve. The control mode switching valve assembly includes a first solenoid directional valve and a second solenoid directional valve. This system features a high-precision active compensation control mode and a simple and reliable proportional control mode, which can be switched between each other, resulting in high system safety and reliability.

The invention relates to a hydraulic drive system, to a method for adjusting a delivery volume in a hydraulic drive system, and to the use of the hydraulic drive system for controlling a hydraulic cylinder. The hydraulic drive system according to the invention is a hydraulic drive system with a first hydraulic machine and a second hydraulic machine which are connected mechanically to one another. The first hydraulic machine and the second hydraulic machine are operated jointly by a variable-speed drive. The first hydraulic machine and the second hydraulic machine are connected hydraulically to at least one first hydraulic cylinder, comprising a first hydraulic cylinder surface and a second hydraulic cylinder surface. The first hydraulic machine and / or the second hydraulic machine have / has an adjustable delivery volume.

The utility model belongs to the technical field of hydraulic push rods, and discloses a hydraulic oil bag driven double-acting electric hydraulic push rod mechanism which comprises a valve seat, a motor is installed on the valve seat, a plurality of valve holes are formed in the valve seat, and each valve hole is correspondingly communicated with a one-way valve, a manual pressure release valve, an exhaust hole, an overflow valve, an upper branch pipe and a lower branch pipe. The output end of the motor is connected with a hydraulic pump, the hydraulic pump is provided with a plurality of via holes corresponding to the valve holes in position, and the valve seat is provided with an oil bag and an oil tank. According to the double-acting hydraulic oil tank, the double-acting design is adopted, balanced pushing force and pulling force can be provided in different directions, the double-acting hydraulic oil tank is suitable for more application scenes, due to the innovative oil bag design, the oil tank is more compact, the total weight is reduced, and the durability and flexibility of the whole system are improved. The oil bag is made of a high-strength elastic material, hydraulic fluctuation can be effectively absorbed, and fluid stability is ensured.

A pneumohydraulic pressure intensifier includes at least one pneumatic piston that is coupled to a hydraulic pump. The pressure intensifier includes a regulator which allows to set the hydraulic output pressure. The regulator is coupled to a hydraulic pilot control valve which is adapted to interrupt the air supply to the pneumatic piston when a set maximum pressure is reached.

The application provides a split oil tank and a hydraulic power system. The split oil tank comprises a main oil tank, a sub-oil tank and a pipeline assembly. The main oil tank comprises a main tank body, a main air inlet, a main oil return port, a main balance oil port and a main oil suction port. The sub-oil tank comprises a sub-tank body, a sub-air inlet, a sub-oil return port, a sub-balance oil port and a sub-oil suction port. The main balance oil port is connected to the main tank body and is located at a preset height. The sub-balance oil port is connected to the sub-tank body and is located below the preset height. The pipeline assembly comprises an air inlet pipeline, a balance pipeline, a main oil return pipeline, a sub-oil return pipeline, a main oil suction pipeline and a sub-oil suction pipeline. Compared with a single oil tank, the split oil tank has certain flexibility in space and can be applied to engineering machinery with limited installation space. The overall structure of the hydraulic power system is more compact. Compared with an oil tank with a special shape, the split oil tank realizes the supplement function of the effective volume of the oil tank and can better meet the pressure requirements of the hydraulic power system.

An accumulator assembly is interposed hydraulically between a source of pressurized fluid and at least one wheel brake of a corresponding first or second pair of wheels. The accumulator assembly includes a medium pressure accumulator, a nonpowered MPA fill valve interposed fluidically between a pump-side passage of the medium pressure accumulator and the source of pressurized hydraulic fluid, a powered MPA one-way valve interposed fluidically between a brake-side passage of the medium pressure accumulator and the at least one corresponding wheel brake, and an MPA check valve interposed fluidically between the brake-side passage of the MPA cavity and the at least one corresponding wheel brake. An electronic control unit is provided for controlling at least one of the secondary brake module and the master cylinder responsive to at least one braking signal. The accumulator assembly facilitates a non-powered evac / fill phase of lifetime operation of the brake system.

To be solved is to provide a hydraulic supply device and a hydraulic supply method that can supply hydraulic pressure of a constant pressure for a certain period of time even if some failure occurs in a hydraulic system to be connected. According to the present invention, the hydraulic supply device includes: a first connection line 11; a pump 2 that delivers hydraulic oil to the first connection line 11; a second connection line 12 to which hydraulic oil is supplied from the first connection line 11; a third connection line 13 to which hydraulic oil is returned from the second connection line 12; an accumulator 3 connected to the first connection line 11; a pressure reducing valve 4 that reduces the pressure of hydraulic oil introduced from the first connection line 11 and then supplies the hydraulic oil to the second connection line 12; and a valve device 5 that discharges hydraulic oil from the first connection line 11 to the third connection line 13, wherein the second connection line 12 is connected to the first connection line 11 only through the pressure reducing valve 4, and the valve device 5 is switched from a state in which hydraulic oil in the first connection line 11 is not discharged to the third connection line 13 to a state in which hydraulic oil in the first connection line 11 is discharged to the third connection line 13 when the pressure of the hydraulic oil in the first connection line 11 is greater than a first pressure.

A load dampening system 60 for a working vehicle is provided. The load dampening system comprises a load handling hydraulic actuator 28 configured to support a load carried by the working vehicle and an accumulator apparatus 100 for storing pressurised hydraulic fluid. The accumulator apparatus is selectively connectable to the load handling hydraulic actuator to act as a compliant element which dampens pressure fluctuations in the load handing hydraulic actuator. The load dampening system also comprises a control system 70 configured to adjust a compliance of the accumulator apparatus to adjust the extent to which the accumulator apparatus dampens pressure fluctuations in the load handling hydraulic actuator.

The present application relates to the technical field of hydraulic system, and proposes a hydraulic control system and working machine. In the hydraulic control system, the swash plate oil cylinder comprises a cylinder barrel and a piston. The piston is in sliding connection with the cylinder barrel. The piston is connected with the swash plate of the walking motor. The spring cavity, the first working cavity and the second working cavity are formed between the piston and the cylinder barrel. The acting area of the first working cavity is larger than that of the second working cavity. The swash plate control valve is connected with the oil source and the swash plate oil cylinder, and is used for controlling the communication state of the oil source with the first working cavity and the second working cavity. Through the structure setting, the first working cavity, the second working cavity and the spring cavity are arranged between the cylinder barrel and the piston, so that the difference between the acting area of the piston in the first working cavity and the acting area of the piston in the second working cavity is formed. The communication state of the first working cavity and the second working cavity with the oil source is controlled through the swash plate control valve, so that the walking motor realizes the switching of more speed states, and the speed regulating range of the walking motor is expanded.

A hydraulic drive system for operating a hydraulic cylinder in first and second movement profiles. A hydraulic drive unit includes first and second hydraulic machines, each with first and second connections. In the first movement profile, a first cylinder chamber of the hydraulic cylinder is fluidly connected to a first fluid reservoir and a second cylinder chamber is fluidly connected to the second connection of the second hydraulic machine. In the second movement profile, the first connection of the first hydraulic machine is connected to the second connection of the second hydraulic machine.

A hydraulic actuator comprising a housing, a piston, first to third pressure chambers, and a plurality of arrangements of piezoelectric elements arranged inside one of the plurality of chambers. A computer implemented internal brake for selectively switching between a braking mode and a non-braking mode of the piston comprises the third chamber, and fluid connections between the first to third chambers with flow control elements.

To provide a hydraulic control device of a pouring unit for a primary molding machine.SOLUTION: In a pouring cylinder 10 having a rod-side annular chamber 15 and a bottom-side bottom chamber 14 separated by a piston 11, in a hydraulic control device of a pouring unit 1, piston force and piston speed can be controlled by selectively connecting a pressure medium source 34 and a pressure medium tank T through hydraulically operable valve devices 27, 29, 41 and 46. Control pressure medium accumulators SD1 and SD2 which can be boosted are disposed, and the control pressure medium can be utilized to hydraulically operate the valve device through the pressure medium accumulators by the hydraulic control device.SELECTED DRAWING: Figure 2

The application discloses a kind of methods suitable for pressure oil tank pressure element monitoring and setting under different operating conditions of unit, the unit operating condition in the monitoring system is acquired, judges governor hydraulic system pressure oil tank valve state;Confirm that governor hydraulic system pressure oil tank pressure element has monitoring and control condition under the operating condition of unit, the monitoring and control of pressure measuring element are carried out along with the rise or drop of hydraulic system oil pressure under the operating condition of unit, and pressure oil tank pressure element monitoring and control process is executed, realizes pressure oil tank pressure measuring element online monitoring and control;The application confirms that governor hydraulic system pressure oil tank pressure measuring element has online setting condition under the unit maintenance operating condition, changes output oil pressure by starting pressurizing pump control device to carry out online setting, executes pressure oil tank pressure measuring element online setting process under the unit maintenance operating condition, realizes pressure oil tank pressure measuring element online setting function.

Example implementations relate to a pressure regulator assembly for a closed fluid loop of a CDU. The pressure regulator assembly has a cylinder having an internal volume, and first and second hollow pistons slidably connected to the cylinder to split the internal volume into a first volume portion having cooling fluid, a second volume portion having driver fluid, and a third volume portion having compressible matter. The first volume portion is fluidically connected to the closed fluid loop. The first hollow piston is reciprocated by the compressible matter to maintain operating pressure of the cooling fluid in the closed fluid loop. The second hollow piston is driven by the driver fluid in response to predefined pressure drop of the cooling fluid during predefined time period, to inject additional cooling fluid from the first volume portion into the closed fluid loop to restore pressure level of cooling fluid to operating pressure.

An electrohydrostatic actuator (EHA) for unlocking a uplock of an aircraft is provided, the EHA includes a solenoid, a plunger, a first manifold, and an unlock mechanism. The plunger is mechanically coupled to the solenoid. Responsive to the solenoid being energized, the solenoid is configured to translate the plunger in a first direction to push a hydraulic fluid into the first manifold that feeds the unlock mechanism. Responsive to a command to unlock the uplock of the aircraft, the hydraulic fluid is pushed to the unlock mechanism thereby causing the unlock mechanism to maneuver an over-centered mechanism over a centerline and unlock a uplocked landing gear.

An example electrohydraulic actuator includes: a housing; a hydraulic cylinder actuator disposed within the housing and comprising a cylinder and a piston, wherein the piston divides an internal space of the cylinder into a first chamber and a second chamber, and wherein the hydraulic cylinder actuator is unbalanced; an accumulator disposed within the housing and comprising an annular fluid chamber encircling the cylinder of the hydraulic cylinder actuator, wherein the accumulator is configured to provide boost fluid flow or receive excess fluid flow comprising a difference between the first fluid flow rate and the second fluid flow rate; and an assembly disposed within the housing and comprising: (i) a pump configured to be a flow source, and (ii) an electric motor configured to drive the pump to provide fluid flow to the first chamber or the second chamber of the hydraulic cylinder actuator to drive the piston.

A fluid pressure circuit in which efficiency of pressure accumulation is high is provided. A fluid pressure circuit 100 includes a plurality of drive portions 5, 6, 7 connected to a single load 4, and an accumulator 10 configured for accumulating pressure. The drive portions 5, 6, 7 include at least one drive portion 7 of which a return flow passage 23-2 branches and is connected to the accumulator 10.

The invention relates to an apparatus (1) comprising a plurality of tools (2) each having at least one hydraulic chamber (6) for hydraulic liquid, and a hydraulic manifold (4) configured for storing pressurized hydraulic liquid and supplying hydraulic liquid to said plurality of tools (2), wherein each tool (2) comprises a communication conduit (7) extending between the hydraulic chamber (6) and said hydraulic manifold (4), the hydraulic chamber (6) having varying volume during the operation of the tool (2). The apparatus (1) is characterized in that each tool (2) comprises a hydraulic buffer unit (8) for preventing propagation of hydraulic pulsations between the tool (2) and the hydraulic manifold (4) in response to the varying volume of the hydraulic chamber (6), wherein the hydraulic buffer unit (8) has a buffer chamber (9) having varying volume in response to varying volume of the hydraulic chamber (6).

A method of pressurizing a closed-cycle engine includes performing a non-steady state operation in which a working fluid flows to or from a pressurized tank: i) to or from a plurality of sumps defined by respective ones of a plurality of cylinder-piston assemblies of the closed-cycle engine; or ii) to or from one or more air bearings associated with each one of the plurality of the cylinder-piston assemblies; or iii) both and performing, before and / or after performing the non-steady state operation, a steady-state operation in which the working fluid flows through the plurality of sumps and the one or more air bearings along a steady-state loop that is fluidly decoupled from the pressurized tank.

A pneumohydraulic pressure intensifier includes at least one pneumatic piston that is coupled to a hydraulic pump. The pressure intensifier includes a regulator which allows to set the hydraulic output pressure. The regulator is coupled to a hydraulic pilot control valve which is adapted to interrupt the air supply to the pneumatic piston when a set maximum pressure is reached.