370results 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.

The invention proposes a double barrier pressure compensator for performing a pressure compensation between seawater surrounding a subsea installation and a medium filling a volume of the subsea installation. Said pressure compensator comprises: —a housing (20) having a first opening (202b) and a second opening (30); —a first bellows (4) and a second bellows (5) arranged one above the other within the housing (20) and each sealingly fixed to the housing (20) at their distal ends (43, 53); —a moving separation element (6) adapted to move inside the housing (20) and sealingly fixed to each of the proximal ends (44, 54) of the first and second bellows (4, 5) so as to separate a first compartment (21) from a second compartment (22) of the housing (20) sealed with respect to each other. Said pressure compensator (2) further comprising a third compartment (23) formed by a space between the housing (20) and the first and second bellows (4, 5), the first compartment (21) being arranged to be fluidly connected to the subsea installation (1) through the second opening (30), the second compartment (22) being arranged to be in communication with sea water through the first opening (202b), and said third compartment (23) being filled with a barrier medium.

A hauling vehicle includes a steering circuit having a steering cylinder steered by pressure oil from a hydraulic source, a steering valve that controls the flow of pressure oil to the steering cylinder, and an accumulator that stores pressure oil from the hydraulic source and can supply it to the steering cylinder via the steering valve. The steering circuit is connected to the hydraulic source and the hydraulic fluid tank via a composite control valve. The composite control valve has a first position for communication between the steering circuit and the hydraulic source and blocking communication between the steering circuit and the hydraulic fluid tank, and a second position for communication between the steering circuit and the hydraulic source and communication between the steering circuit and the hydraulic fluid tank. The composite control valve has a throttle in the oil passage that connects the steering circuit in the second position with the hydraulic fluid tank.

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.

An energy storage system includes a pneumatic vessel, a cable system attached to the vessel, a compressor for pressurizing the vessel, a generator attached to the cable system, a turboexpander generator for receiving compressed air from the vessel, and a control system. The system deflates and allows the vessel to sink in a body of water, inflates the vessel to store energy when an abundance of it exists, and allows the inflated vessel to resurface to release its buoyant energy to the generator via the cable system and to release compressed air to the turboexpander generator to generate electricity when electricity demand is high and / or electricity generation from other sources is low.

To provide a hydraulic circuit that includes a hydraulic distribution module and at least one hydraulic regulator device that can manage the primary flow.SOLUTION: A distribution module 102 comprises a spool 11, 21 including an inlet recess 111, 121 and a drain recess 112, 122. The inlet recess and the drain recess are configured such that the flow rate of fluid that enters the utility E1, E2 is equal to or less than the flow rate of fluid that exits the utility. Further, a first driving channel 31 and a second driving channel 32 are provided respectively, so that a pressure obtained upstream of the drain recess acts on a first side 21a, 22a of a three-way regulator device 21, 22, and so that a pressure obtained downstream of the drain recess in the first driving channel acts on a second driving-channel side 21b, 22b of the three-way regulator device, and an additional force.SELECTED DRAWING: Figure 1

The present invention relates to a multi-cylinder cone crusher hydraulic system, comprising a main oil circuit and three branch oil circuits: a locking cylinder circuit, a hydraulic motor circuit, and a release cylinder circuit. The locking cylinder circuit is provided with a locking cylinder circuit metering pump, which connects the locking cylinder to the main oil circuit; the hydraulic motor circuit is provided with a hydraulic motor circuit metering pump, which connects the hydraulic motor to the main oil circuit; and the release cylinder circuit is provided with a release cylinder circuit metering pump, which connects the release cylinder to the main oil circuit. In the present invention, the locking cylinder circuit, the hydraulic motor circuit, and the release cylinder circuit can be supplied with oil independently or can draw oil from the main oil circuit.

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 vertical speed control device for the aircraft test bench comprises an oil tank, a hydraulic cylinder and a hydraulic pump, the hydraulic cylinder is divided into a rod cavity and a rodless cavity by a piston, a piston rod of the hydraulic cylinder is connected with an aircraft tire, and the vertical speed control device further comprises a hydraulic energy accumulator, a first pilot electromagnetic valve, a first cartridge valve, a second pilot electromagnetic valve, a second cartridge valve and an electromagnetic reversing valve, the hydraulic energy accumulator is connected with the hydraulic pump and is arranged on a hydraulic oil circuit between the hydraulic pump and the hydraulic cylinder; control interfaces of the first pilot electromagnetic valve and the second pilot electromagnetic valve are respectively communicated with pressure oil of the hydraulic pump, the first cartridge valve is connected with the first pilot electromagnetic valve, the second cartridge valve is connected with the second pilot electromagnetic valve, the first cartridge valve and the second cartridge valve are respectively communicated with the rodless cavity of the hydraulic cylinder through hydraulic pipelines, and the electromagnetic reversing valve is provided with a main oil inlet P, a main oil return port T and two working oil ports, and the vertical speed control device can simulate the aircraft to provide a precise and adjustable vertical impact speed loading.

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.

Systems and methods for creating a pressure pulse within a pipeline are disclosed. The method includes isolating a barrel of a pipeline inspection gauge (PIG) station from the pipeline, pressurizing the barrel up to a selected pressure, and opening an isolation valve between the barrel and the pipeline, thereby creating the pressure pulse.

The present invention discloses a piston-type oil tank with safety valve and a riveting tool, relating to the technical field of riveting tools. In the first aspect, a piston-type oil tank with safety valve comprises a tank body, with a separator piston arranged inside the tank body, and also an oil inlet and an air outlet provided at the front and rear ends of the separator piston respectively. The separator piston is arranged with a penetrated safety valve core, a support frame is arranged at the end of the safety valve core facing the air outlet, and a stop plate is provided at the end of the safety valve core facing the oil inlet, with the length of the safety valve core greater than that of the separator piston; an oil discharge groove is provided on the side wall of the safety valve core, and when the support frame presses against the end face where the air outlet is located, the oil discharge groove connects the spaces on both sides of the separator piston, and an oil outlet gap is reserved between the support frame and the end face where the air outlet is located. In the second aspect, a riveting tool comprises the aforementioned piston-type oil tank with safety valve and also a pump body, wherein the tank body is connected to the pump body. The present invention features a longer service life and higher safety.

An agricultural machine comprises a tool-holder chassis (200), at least one inter-row unit (100), and a hydraulic system (600) comprising a delivery line (301) suitable for being connected to a primary pump (P) to feed pressurized oil to a hydraulic actuator (103) of the inter-row unit and a return line (302) connected to a reservoir (303); the hydraulic system (600) comprises a divider-distributor (6) arranged in the delivery line (301) and having a primary outlet (60) connected to the hydraulic actuator (103) of the inter-row unit (100) and a plurality of secondary outlets (61) connected to the services of the tool-holder chassis (200); a distributor (4) is arranged in the primary outlet (60) of the divider-distributor (6) and has a first outlet (41) connected to the hydraulic actuator (103) of the inter-row unit and a second outlet (42) connected to the return line (302) leading to the reservoir (303); the hydraulic system (600) being configured so that the distributor (4) can be constantly crossed by pressurized oil from the divider-distributor (6).

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 application discloses a fluid control device and a control system thereof. The fluid control device comprises a control valve, an inner cavity of a valve body of the control valve is provided with a supply medium cavity and a return medium cavity, the valve body is provided with a supply medium inlet channel and a supply medium outlet channel which are communicated with the supply medium cavity, and the valve body is provided with a return medium inlet channel and a return medium outlet channel which are communicated with the return medium cavity; the control valve further comprises a supply medium on-off control switch and a return medium on-off control switch, the supply medium on-off control switch controls opening and closing of the supply medium outlet channel, and the return medium on-off control switch controls opening and closing of the return medium inlet channel; the fluid control device further comprises a negative pressure generating device, the return medium cavity is connected with the negative pressure generating device, and when the negative pressure generating device is in a working condition of forming negative pressure, fluid in the return medium cavity flows out. The fluid control device can replace a traditional multi-way valve, and can provide a technical basis for digitalization and intelligent control of a hydraulic control system.

2. Method for positioning an actuator (12), in particular in the form of a hydraulic working cylinder (14) which is connected to a hydraulic supply circuit (10) with a pressure supply device (32) in the form of a motor-pump group (34), characterized in that during the movement process of the actuator (12) a theoretical position s (t) is determined by means of the hydraulic transmission ratio between the pump (36) and the actuator (12) taking into account the respective current rotational speed n of the motor (M). zyl - and actual speed value v (t) zyl is calculated and that at least this theoretical actual position value serves as the actual value of a position controller for a motor control (FU) of the motor-pump group (34).

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.

Disclosed are a movable arm damping system for a loading machine and an operation machinery. The movable arm damping system for the loading machine includes a multi-way valve assembly, a movable arm oil cylinder, a movable arm damping valve assembly, and a damping lock valve. The multi-way valve assembly includes a movable arm valve core and a bucket valve core. A first movable arm oil port of the movable arm valve core communicates with a rod cavity of the movable arm oil cylinder, and a second movable arm oil port of the movable arm valve core communicates with a rodless cavity of the movable arm oil cylinder. A switching oil port of the damping lock valve communicates with a switching oil port of the bucket valve core.

An embodiment of the present invention provides a regeneration system of energy released from a working implement, which includes an actuator configured to move up and down the working implement, an accumulator configured to communicate with the actuator, and a controller configured to receive a pressure value of the actuator and a pressure value of the accumulator to control a discharge operation of the accumulator based on a pressure difference value between the actuator and the accumulator.

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.

There is provided a fluid circuit capable of continuously driving a pressure-increasing device with a simple configuration. A first switching valve 8 that switches between flow passages 70 and 80 which allow communication between a first pressure-receiving chamber 10-3 and a fluid supply device 6 side and flow passages 70 and 82 which allow communication between a second pressure-receiving chamber 10-4 and the fluid supply device 6 side, according to a change in a fluid pressure to be applied, and a second switching valve 130 that is switched to flow passages 131 and 133 which apply the fluid pressure to the first switching valve 8, are provided. The second switching valve 130 includes return device 140, and is provided to be reciprocatable between an operation position to which the second switching valve 130 is moved by a stroke of a piston 120 and a return position to which the second switching valve 130 is moved by the return device 140. The piston 120 and the second switching valve 130 are movable independently of each other.

A backup emergency valve drive system for a liquified gas container, having hydraulic accumulators 4 supplying hydraulic fluid to emergency valves 6 of a liquefied gas vessel, and hydraulic pressure i