552results about "Accumulator installations" patented technology

According to the impact-cutting composite rock breaking hydraulic system and method for the mining heading machine, hydraulic damping and impact hammer collaborative operation are integrated, and the problems that a traditional heading machine is low in rock breaking efficiency, poor in stability and insufficient in adaptability are solved. The system comprises a cutting arm hydraulic damping system and an impact hammer hydraulic impact system, and multi-parameter closed-loop regulation and control are achieved through a controller. The device is characterized in that a double overflow protection mechanism is adopted, a proportional overflow valve and an external control overflow valve cooperate with each other, a hydraulic control one-way valve is combined for compensating an oil path, and the pressure difference of a hydraulic cylinder is dynamically kept stable; the impact hammer system adjusts the pressure of an energy accumulator through a proportional pressure reducing valve and is matched with a hydraulic control switch valve to realize variable impact energy control; based on feedback of a vibration sensor and a pressure sensor, damping and impact parameters of the cutting arm are adjusted in a self-adaptive mode through a nonlinear algorithm, and intelligent rock breaking operation under different rock stratum hardness is achieved. According to the system, the impact resistance stability, the rock breaking efficiency and the operation intelligence level of the heading machine are remarkably improved.

The invention discloses an integrated electro-hydraulic driving unit of a marine anchor and mooring machine. The integrated electro-hydraulic driving unit comprises an oil supplementing system, a main driving system, a control system, a safety system and a hydraulic motor, an oil supplementing pump in the oil supplementing system is connected with an oil drainage tank and communicated with a pressure oil tank in the main driving system, the pressure oil tank is communicated with a main pump in the main driving system through two third one-way valves, a port A and a port B of the main pump are communicated with a port A and a port B of a hydraulic motor respectively, and one ends of two safety valves in the safety system are connected with the port A and the port B of the main pump respectively. The other ends of the two safety valves are connected in parallel to a pipeline between the oil outlet of the pressure oil tank and the inlets of the two third one-way valves; a controller of the control system is in electric signal connection with the main motor; and an output shaft of the hydraulic motor is connected with an input shaft of the anchor windlass. Therefore, according to the design, the hydraulic pump station, the control valve and the hydraulic motor can be integrated, and the integration degree is high.

An accumulator includes: an exterior body including a bottom, a shell and a port; and a bellows provided inside the exterior body and having an S-shape being capable of expansion and contraction. In a case where the bellows has expanded maximally in the accumulator, the bellows has expanded from a free state where no load other than gravitational force is being applied to the bellows.

The utility model discloses an energy storage cylinder and system of a disc spring hydraulic mechanism, and the energy storage cylinder comprises a cylinder body which is internally provided with a cavity, a piston, a sealing ring and a high-pressure oil channel; the piston is movably arranged in the cavity; the cavity comprises a working cavity and a low-pressure cavity; one end of the working cavity is connected with the high-pressure oil channel, the other end of the working cavity is connected with the low-pressure cavity, and the diameter of the low-pressure cavity is larger than that of the working cavity. The sealing ring is arranged on the periphery of the piston and used for preventing high-pressure oil entering from the high-pressure oil channel from flowing into the low-pressure cavity when the sealing ring is located in the working cavity. The high-pressure oil channel is used for inputting high-pressure oil to push the piston to move towards the low-pressure cavity or outputting the high-pressure oil to enable the piston to move towards the direction away from the low-pressure cavity. And the low-pressure cavity is used for collecting high-pressure oil flowing out of the sealing ring when the sealing ring is separated from the working cavity. The low-pressure oil cavity with the diameter larger than that of the working cavity is formed in the energy storage cylinder, high-pressure oil leakage occurs at the position of the sealing ring, and energy storage of the energy storage cylinder is stopped.

The present invention provides a hydraulic system and a hydraulic control method for a self-propelled mowing and rolling machine. The hydraulic system of the self-propelled mowing and rolling machine includes: an integrated hydraulic valve block, a cutter bar lifting oil cylinder, a cutter bar tilting oil cylinder, a plurality of roller gap adjustment oil cylinders, and a pair of floating oil cylinders. The cutter bar lifting oil cylinder, the cutter bar tilting oil cylinder, the plurality of roller gap adjustment oil cylinders, and the pair of floating oil cylinders are all connected to the integrated hydraulic valve block through pipelines. Multiple groups of hydraulic control valves are integrated in the integrated hydraulic valve block, and the integrated hydraulic valve block is used to control the cutter bar lifting oil cylinder, the cutter bar tilting oil cylinder, the plurality of roller gap adjustment oil cylinders, and the pair of floating oil cylinders to perform corresponding operations, which facilitates the operation of the hydraulic system, simplifies the pipeline structure, reduces the hydraulic pipelines, improves the integration degree, and is convenient for the installation and maintenance of the hydraulic valve block.

A controller of a wheeled hydraulic excavator executes control of a vibration suppression function to control the flow of a hydraulic fluid from a hydraulic cylinder that drives a work implement, thereby suppressing vibration of the hydraulic cylinder when the rotation speed of wheels reaches a predetermined speed or higher. Furthermore, the controller disables the control of the vibration suppression function when the vehicle body is jacked up by the work implement, even when a vibration suppression instructing device has given an instruction for enabling the control of the vibration suppression function.

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 hydraulic system for a passenger restraint device includes a hydraulic pump and a hydraulic section. The hydraulic section includes a hydraulic accumulator, a valve arrangement and a hydraulic cylinder unit with a piston. The valve arrangement is connected to the hydraulic pump, the hydraulic accumulator and the hydraulic cylinder unit. The piston can be moved between an open position and a first closed position. The hydraulic pump can pressurize the hydraulic cylinder unit so that the piston moves from the first closed position to the open position. The hydraulic accumulator is configured so that the piston moves from the open position to the first closed position. The hydraulic cylinder unit can be pressurized in a first switching position of the valve arrangement with a first pressure stage and in a second switching position of the valve arrangement with a second pressure stage lower than the first pressure stage.

The disclosure relates to an hydraulic accumulator, in particular a diaphragm accumulator, having an accumulator housing and a separating element disposed therein, which separates two media spaces from each other, wherein a weld seam is formed by a laser or electron beam welding process without any filler materials, in that at least a part of the wall parts delimiting the transition point are melted to form the weld seam, which closes off the transition point towards the surroundings, in a manner that is free of protrusions with respect to an outer circumferential surface of a connection element.

An aerial work platform and a floating control system thereof, the system comprising a driving mechanism, a hydraulic oil tank, a hydraulic pump, a floating control valve, a floating mechanism, a boom function valve, an actuator, and an accumulator: the floating control valve comprises a first one-way valve, a second one-way valve, a pressure reducing valve, and a logic valve; and an oil inlet of the first one-way valve serves as the oil inlet of the floating control valve, an oil outlet of the first one-way valve is connected to a pipeline connecting the accumulator, the pressure reducing valve and the logic valve, the logic valve is connected to the second one-way valve, an oil outlet of the second one-way valve serves as the feedback oil port of the floating control valve, when the hydraulic pump is a variable displacement pump, a feedback oil port of the floating control valve and a feedback oil port of the boom function valve are connected to a feedback oil port of the variable displacement pump; when the hydraulic pump is a fixed displacement pump, a feedback oil port of the floating control valve is connected to a feedback oil port of the boom function valve. The invention can reduce the power loss and improve the reliability of the system.

A load-controlled hydraulic supply for an attachment attached to an agricultural tractor includes a hydraulic high-pressure source providing a volume flow in a supply line, a return line leading to a hydraulic reservoir, and a load-indicating line connected to a device for pressure limiting. The volume flow is adjusted based on pressure feedback prevailing at the load-indicating line.

The invention discloses a pump source, which relates to the technical field of hydraulic pressure and comprises an oil return pipe, a main energy accumulator type pump, an auxiliary energy accumulator and an output pipeline, a main piston, a heavy hammer and a driving mechanism are connected in the main energy accumulator type pump, a first working cavity is formed below the main piston, and an oil tank is formed above the main piston; the driving mechanism is connected with the main piston through a clutch; after the clutch is separated, the driving mechanism is separated from the main piston and the heavy hammer, the main piston and the heavy hammer pressurize oil in the first working cavity by means of gravity, and the oil is conveyed outwards through the output pipeline so as to achieve the state of supplying oil outwards. When the clutch is combined, the driving mechanism is used for driving the main piston and the heavy hammer to move upwards, lifting of the main piston and the heavy hammer is achieved, so that oil in an oil tank located above the main piston is pumped and supplemented into a first working cavity, the oil pumping state of the main energy accumulator type pump is achieved, and the auxiliary energy accumulator maintains the state of supplying oil to an output pipeline in a pressure maintaining mode; therefore, the pump source continuously supplies oil to the outside.

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.

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.

An agricultural machine includes a main frame, a rockshaft pivotably coupled to the main frame, a lift actuator couple between the rock shaft and the main frame, a lift arm pivotably coupled to the main frame below the rockshaft, a lift strap coupled between the rockshaft and the lift arm, and a lift actuator coupled between the main frame and the lift strap to pull the lift arm upwards. The agricultural machine includes header, which is supported by the lift arm and the float actuator above the ground at a desired harvesting height. During harvesting, the lift arm may encounter uneven ground, causing the header to move away from the desired harvesting height. By measuring float actuator pressure or header position and by changing the pressure in the float actuator or lift actuator in response, the header can be rapidly returned to the desired harvesting height.

The invention discloses a sliding nozzle hydraulic control system and method.The method comprises the steps that the system comprises an oil inlet pipeline, an oil return pipeline, a working energy storage device, an accident energy storage device, an accident closing device, a high-speed switching device, a low-speed switching device and a pressure releasing device, and the oil inlet pipeline is used for providing hydraulic oil for the system; the oil return pipeline is used for recovering hydraulic oil in the system; the working energy storage device is used for absorbing hydraulic impact and hydraulic fluctuation in the system; the accident energy storage device is used for storing hydraulic energy and providing the hydraulic energy for the hydraulic cylinder which urgently closes the sliding nozzle; the accident closing device is used for urgently closing the hydraulic cylinder, and the quick switching device is used for controlling quick opening and quick closing of the hydraulic cylinder. The low-speed switch device is used for controlling low-speed opening and low-speed closing of the hydraulic cylinder; and the pressure release device is used for releasing pressure in the hydraulic cylinder. Through the technical scheme provided by the invention, the safety of hydraulic control of the sliding gate nozzle can be 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.

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 invention relates to the technical field of header hydraulic control, in particular to a header control valve set, a hydraulic control system, a control method and agricultural machinery. The electric proportional directional valve controls the ascending speed of the header and pressure building and unloading of the metering pump, the electric proportional throttle valve controls the descending speed of the header, the flow distributing and collecting valve ensures that the left header oil cylinder and the right header oil cylinder ascend and descend synchronously, and the hydraulic control proportional throttle valve ensures that the header recovers stability when floating. And the constant pressure difference overflow valve ensures that the output flow is stable when the header ascends. The whole system has the advantages of stable and controllable action, energy conservation, high efficiency, high integration level of the valve group and the like.

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.