1090results about "Pump assemblies" patented technology

There is described a device for adjusting a seat position of a bicycle seat. The device allows a rider of a bicycle to adjust the tilt of their bicycle seat while the bicycle is in motion, without the rider having to first dismount. In some embodiments, the rider may also adjust the height of their bicycle seat at substantially the same time as the seat's tilt is adjusted, again without the rider having to first dismount. There are described a motorized embodiment in which one or more motors are used to drive a tilt actuator and a linear actuator, and a mechanized embodiment in which a source of pressurized air may be used to drive the linear actuator which in turn drives the tilt actuator.

A linear actuator system includes a linear actuator and an integrated pump assembly connected to the linear actuator to provide fluid to operate the linear actuator. The integrated pump assembly includes a pump with two fluid drivers, each fluid driver comprising a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from a first port of the pump to a second port of the pump. The pump assembly also includes two valve assembles to isolate the pump from the system. The linear actuator system also includes a controller that establishes the pump in a normal mode of operation in which the prime movers are independently driven and switches to a fail-safe mode of operation in which only one prime mover is operated.

An oil system of a gas turbine engine, includes a first oil circuit and a second oil circuit. Via the oil circuits, oil is supplied to a hydraulic load of a transmission of the engine. Downstream of the load, in the region of a return of the transmission, oil is introduced into the oil circuits from the transmission. Upstream of the load, in the region of inlets, oil can be introduced into the transmission from the oil circuits. The second oil circuit includes an oil accumulator between the return and the inlet of the second oil circuit. The oil accumulator is configured such that, according to a feed pressure of the oil upstream of the inlet, oil is stored in the oil accumulator or oil stored in the oil accumulator is fed toward the inlet.

An example hydraulic system has: a hydraulic cylinder actuator having a cylinder and a piston axially movable in the cylinder, wherein the piston has a piston head that divides an internal space of the cylinder into a first chamber and a second chamber; a fluid reservoir; a pilot pressure source that generates a pilot fluid signal; and a valve assembly controlling fluid flow to and from the hydraulic cylinder actuator, wherein the valve assembly has a first workport fluidly coupled to the first chamber, a second workport fluidly coupled to the second chamber, a reservoir port fluidly coupled to the fluid reservoir, and a pilot port fluidly coupled to the pilot pressure source to receive the pilot fluid signal, wherein the pilot fluid signal actuates the valve assembly to fluidly couple the first workport and the second workport to the reservoir port, thereby operating the piston in a float mode.

An arrangement for operating a load-controlled hydraulic system of an agricultural tractor, includes a hydraulic pump generating a system pressure and having an actuating device to adjust a displacement volume, a hydrostatic vehicle steering system connected to the hydraulic pump and having a steering orbitrol and a first load-indicating pressure, a pressure-regulating valve connected upstream of the steering orbitrol and actuated via a pressure difference decreasing across a throttle element counter to a predetermined restoring force in accordance with the first load-indicating pressure, a second hydraulic consumer connected to the hydraulic pump and feeding a second load-indicating pressure back to a shuttle valve arrangement, which compares and transmits the respectively higher of the first and second load-indicating pressures to the actuating device to adjust the displacement volume, and a pressure-copying valve indirectly feeding back the first load-indicating pressure to the shuttle valve arrangement.

The invention provides a hydraulic oil tank with high cleaning performance, which relates to the technical field of hydraulic oil tanks and comprises a tank body, an oil pan and an oil tank cover, an oil return pipe and an oil suction pipe are respectively arranged at two ends of the tank body, an oil return cavity, an overflow cavity and an oil suction cavity are arranged in the tank body, the oil pan is arranged at the bottom of the tank body, and the oil tank cover is fixedly mounted at the top of the tank body. The quick release assemblies are mounted on the outer side of the tank body, the two cleaning assemblies correspond to the oil return cavity and the oil suction cavity in the tank body in position and are mounted on the oil tank cover, and the overflow assembly corresponds to the overflow cavity in the tank body in position and is mounted on the oil tank cover. The cleaning assembly is driven to clean impurities adhering to the inner wall of the rectangular oil tank, bubbles and floating foam on the surface of the oil body are eliminated in the cleaning process, the cleaning performance of the oil tank is improved, meanwhile, the cleaning assembly is in linkage with the overflow assembly to heat the oil body, and the oil tank can meet the use requirement of the cold environment.

A method for filling a hydraulic circuit of an electro-hydrostatic system includes connecting first and third shut-off valves to a discharge valve, and connecting a second shut-off valve to a filling valve, while the second and third shut-off valves are closed, opening the filling valve, the discharge valve and the first shut-off valve and operating a vacuum generator, once a vacuum has been established in the hydraulic circuit, opening the second shut-off valve in order to fill the hydraulic circuit with pressurized hydraulic fluid while the vacuum generator is still in operation, once the hydraulic circuit has been filled with fluid, closing the first shut-off valve and then opening the third shut-off valve in order to bypass the vacuum generator and circulate the fluid through the electro-hydrostatic system until the fluid contained in the hydraulic circuit reaches a predetermined pressure, and closing the discharge valve and the filling valve.

On a turn frame of an excavation machine, a hydraulic oil tank is placed in the center of a right engine chamber in the front-back direction, a control valve is placed in front of the hydraulic oil tank, a battery is further placed in front of the control valve, and a cool mechanism is placed behind the hydraulic oil tank. The control valve is supported by a support member, and a controller that outputs a signal for driving the control valve is mounted to a side plate part of the support member, thereby to be placed in a position in front of the control valve and above the battery.

The invention relates to a low-pressure unit (1) for raising a pressure level in a hydraulic drive (8). The low-pressure unit (1) comprises a tank pressure accumulator (2) for storing a hydraulic fluid at a desired pressure, a low-pressure accumulator (3) downstream of the tank pressure accumulator (2) for intermediate storage of the fluid, and a hydraulic pump (4) driven by a motor (5). According to the invention, the tank pressure accumulator (2), the low-pressure accumulator (3), and the pump (4) are hydraulically coupled to one another via a connecting block (6), and the connecting block (6) is designed such that the low-pressure unit (1) can be directly integrated into or connected to a main control block of the hydraulic drive (8) via the connecting block (6), or is already integrated into or connected to it.

The invention provides an oil level monitoring and leakage early warning system for a hydraulic system of a dredger, which relates to the technical field of hydraulic system monitoring and comprises a hydraulic oil tank, an actuating mechanism assembly connected with the hydraulic oil tank through a pipeline, a data processing unit, a multi-source sensing module, an early warning module and a control module, the multi-source sensing module comprises an integrated liquid level sensor, an actuating mechanism displacement sensor group, an attitude sensor and a temperature sensor, and is used for collecting hydraulic oil level, displacement of each actuating mechanism, ship trim / heeling angle and oil temperature data in real time; the dynamic compensation calculation module is connected with the data processing unit; and the intelligent early warning module is connected with the data processing unit. Normal change and leakage can be distinguished by calculating the oil level change caused by the action of the executing mechanism and the posture of the ship, early warning is conducted in time, pollution and economic losses are prevented, and the situation that when workers inject hydraulic oil, the hydraulic oil splashes, bubbles are generated, and a hydraulic element is damaged can be prevented.

The invention relates to a self-pressurization oil tank which comprises a shell assembly which comprises a first shell used for containing low-pressure fluid and a second shell used for containing high-pressure fluid. The piston assembly is arranged in the shell assembly and comprises a first piston matched in the first shell, a second piston matched in the second shell and a piston rod connected between the first piston and the second piston; and the driving device comprises a first magnetic driving device which is attached to the first piston and a second magnetic driving device which has a magnetic acting force with the first magnetic driving device, and the driving device enables the first piston to be driven to move along the moving direction so as to increase the pressure of the low-pressure fluid in the first shell. The oil tank can increase the oil supply pressure of a hydraulic system in an initial state, is convenient to install and maintain, and can ensure the safety of the oil tank. In addition, the invention further relates to a hydraulic system, a control method of the hydraulic system and an aircraft.

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.

Hydraulic fluid release valve assemblies are described herein. The hydraulic fluid release valve assemblies may include a hydraulic unit base with a hydraulic fluid return channel and a hydraulic fluid release valve that is at least partially inserted in the hydraulic fluid return channel. The hydraulic fluid release valve assembly may further include a driving assembly to contact with the hydraulic fluid release valve to apply a pushing force on the hydraulic release valve to open the hydraulic fluid release valve, and an electrically powered driver connected to the driving assembly, the electrically powered driver, when actuated, causes the driving assembly to move to apply the pushing force to the hydraulic fluid release valve.

The invention provides an energy storage power station, application of the energy storage power station and a liquid flow energy storage tank box. The liquid flow energy storage tank box comprises a frame, a liquid storage tank, a liquid inlet pipe and a liquid outlet pipe. The liquid storage tank is fixed in the frame, the corner fittings are arranged at the top and the bottom of the frame so that the liquid storage tank can be fixed to a transport vehicle and can be mutually fixed and stacked, and transportation and installation of the liquid flow energy storage tank box are facilitated. The liquid storage tank is used for containing electrolyte, the electrolyte can be transported along with the liquid flow energy storage tank box, and the electrolyte does not need to be transported independently. And the electrolyte does not need to be transferred for multiple times, so that the probability of electrolyte leakage is effectively reduced, and the safety is high. Meanwhile, the pollution to the environment is reduced. The liquid flow energy storage tanks can be stacked through the corner fittings, and the occupied area of the energy storage power station is reduced. According to the structure of the energy storage power station, by adding the liquid flow energy storage tanks and stacking the liquid flow energy storage tanks, the energy storage capacity of the energy storage power station can be expanded, the construction efficiency of the energy storage power station is improved, the cost is reduced, and convenient transportation and installation of the large liquid flow energy storage power station are achieved.

A hydraulic oil supply device for an industrial vehicle includes: a first hydraulic oil tank; a second hydraulic oil tank; an upper communication pipe; a lower communication pipe; a first hydraulic oil pipe configured to communicate the first hydraulic oil tank with a hydraulic oil supply target and to be provided with a suction port; a second hydraulic oil pipe configured to communicate the hydraulic oil supply target with the second hydraulic oil tank and to be provided with a discharge port; and a hydraulic oil pump. The second hydraulic oil tank is an airtight tank sealed hermetically against outside air. The upper communication pipe has a first open-end portion and a second open-end portion. The first open-end portion has an opening height higher than an opening height of the suction port. The second open-end portion has an opening height higher than an opening height of the discharge port.

The utility model provides a lifter shell and a tractor. With the forward direction of a tractor as the front, the lifter shell comprises a body part, a first oil filling pipeline and a second oil filling pipeline, the body part is arranged on the upper end face of a gearbox in a sealed mode, and the body part can be matched with the upper end face of the gearbox to form a closed cavity used for containing hydraulic fluid; the first oil filling pipeline is arranged on the body part; the second oil filling pipeline is arranged on the side wall of the body part and extends to be communicated with the gearbox along a pipeline integrally arranged with the inner wall of the body part. The lifter shell is designed to be the independent hydraulic oil tank, independent oil supply to the lifting hydraulic system is achieved, the cleanliness and stability of the lifting hydraulic system are improved, the failure rate of the lifter can be effectively reduced, the positions of the oil filling port and the oil outlet of the lifter shell are designed, the volume and the oil loading quantity of the lifter shell are improved, and the lifting hydraulic system is more convenient to use. And the lifting force and the lifting stroke of the lifter are further improved.

The utility model relates to the technical field of hydraulic devices, and provides a pump station device and a heading machine, the pump station device comprises an oil tank, an air filter and a plugging piece; a first mounting hole and a second mounting hole are formed in the top wall of the oil tank and distributed in the two ends of the oil tank in the longitudinal direction of the oil tank. When the pump station device is installed on the heading machine, the longitudinal direction of the oil tank is consistent with the front-back direction of the heading machine. Before the heading machine goes uphill, the front one of the first mounting hole and the second mounting hole is provided with an air filter, and the rear one of the first mounting hole and the second mounting hole is blocked by a blocking piece; before the heading machine goes downhill, the rear one of the first mounting hole and the second mounting hole is provided with the air filter, and the front one of the first mounting hole and the second mounting hole is blocked by the blocking piece. The plugging piece is installed through a threaded structure, and the sealing performance is improved. Thus, when the heading machine is under different working conditions, the air filter can be located at the high position of the oil tank, the liquid level position in the oil tank is lower than that of the air filter, and leakage of hydraulic oil is effectively avoided.

The invention discloses a variable displacement mechanism in an asymmetric pump, relates to the technical field of fluid transmission and control, and aims at solving the problems that an existing variable displacement mechanism is large in auxiliary oil source pressure, high in energy consumption and poor in control stability due to the fact that a swash plate is affected by one-way torque due to the oil port pressure difference of an axial plunger pump with three flow distribution windows. The variable displacement mechanism in the asymmetric pump comprises a variable displacement cylinder, wherein the variable displacement cylinder comprises a first cylinder barrel and a second cylinder barrel which are oppositely arranged in the movement direction of a piston; the piston is arranged in the first cylinder barrel and the second cylinder barrel; the first piston rod and the second piston rod are respectively arranged at two ends of the piston; the first piston rod is sleeved with the first stiffness spring, the second piston rod is sleeved with the second stiffness spring, and the stiffness of the first stiffness spring is larger than that of the second stiffness spring; and the at least two stop blocks are fixed on the inner wall of the first cylinder barrel. The pressure of the auxiliary oil source in the asymmetric pump is reduced, and the control stability is improved.

The invention discloses a supercritical CO2 vulcanizing machine hydraulic station heat dissipation and heat recovery system, which relates to the technical field of hydraulic systems, and comprises a hydraulic oil tank unit and a gasification coil pipe arranged in a hydraulic oil tank, the temperature sensor is used for monitoring the hydraulic oil temperature in real time; the flow regulating valve is connected with the gasification coil pipe; wherein the temperature control system comprises a PLC (Programmable Logic Controller) and an upper computer, and the PLC is used for receiving data acquired by the temperature sensor, transmitting the acquired data to the upper computer through a modbus protocol for data processing and executing heat dissipation control; the dynamic temperature prediction module and the supercritical CO2 generation unit are connected through a pipeline, and the supercritical CO2 generation unit and the hydraulic oil tank unit are connected through a pipeline; and the heat energy recovery and utilization unit comprises a high-pressure coil pipe and a heat storage medium used for absorbing and storing heat transferred by the high-pressure coil pipe, centralized monitoring and management of equipment are conveniently achieved, and meanwhile the heat energy centralized recovery efficiency and scale benefits are improved.

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.

An operating device for a human powered vehicle comprises a base member, a first operating member, a piston, and an electric generator. The base member includes a cylinder bore. The first operating member is configured to be movably coupled to the base member between a first rest position and a first operated position. The piston is configured to be movably provided in the cylinder bore and to be pulled in response to a movement of the first operating member from the first rest position toward the first operated position. The electric generator is configured to generate electric power in accordance with a physical change applied to the operating device.

The utility model relates to the technical field of oil tank main body air suction prevention, and discloses a damping type hydraulic oil tank main body closed type air suction prevention device which comprises an oil tank main body, an oil injection pipe with one end extending into the oil tank main body is arranged at the top of the oil tank main body, and an oil pumping pipe with one end extending into the oil tank main body is arranged at the top of the oil tank main body. And a limiting sliding rod is arranged between the left side and the right side of the inner wall of the oil tank body. According to the damping type hydraulic oil tank main body closed type air suction prevention device, by arranging the connecting assembly, after an excavator and other equipment move to an uphill road section, hydraulic oil in the oil tank inclines, and at the moment, under the gravity effect, a guide sliding block is matched with a rolling wheel to drive a conveying telescopic hose to slide towards the inclined end of the hydraulic oil; therefore, the influence on the use of the oil pump due to fuel oil output failure caused by empty suction of the oil pipe is avoided, the practicability of the device is improved, and workers can use the device conveniently.

A hydraulic pump system includes a housing defining a tank for containing hydraulic fluid in use; one or more pump modules each comprising a hydraulic pump for supplying hydraulic fluid from the tank to a hydraulic system; and a mounting arrangement; wherein the or each pump module is mounted to the housing by the mounting arrangement.

The utility model discloses a defoaming type oil tank with a heating device, which comprises an oil tank body, a partition plate and the heating device, the partition plate is arranged in the oil tank body to divide the oil tank body into an oil absorption area and an oil return area, the oil absorption area and the oil return area are communicated with each other, a heating area is formed in the communicated area of the oil absorption area and the oil return area, and the heating device is arranged in the heating area. The heating device is installed on the oil tank body and located in the heating area. According to the defoaming type oil tank with the heating device, the partition plate is arranged to divide the oil tank into the oil suction area and the oil return area, so that flowing of oil in the oil tank becomes more regular, bubbles are reduced, the heating device is arranged at the communicating position of the oil suction area and the oil return area, and therefore the heating effect is improved. And oil liquid entering the oil absorption area subsequently can be effectively heated, it is ensured that the oil liquid needing to be circulated subsequently is heated, and the heating effect is better.

The invention discloses a supercritical CO2 vulcanizing machine hydraulic station heat dissipation and heat recovery system, which relates to the technical field of hydraulic systems, and comprises a hydraulic oil tank unit and a gasification coil pipe arranged in a hydraulic oil tank, the temperature sensor is used for monitoring the hydraulic oil temperature in real time; the flow regulating valve is connected with the gasification coil pipe; wherein the temperature control system comprises a PLC (Programmable Logic Controller) and an upper computer, and the PLC is used for receiving data acquired by the temperature sensor, transmitting the acquired data to the upper computer through a modbus protocol for data processing and executing heat dissipation control; the dynamic temperature prediction module and the supercritical CO2 generation unit are connected through a pipeline, and the supercritical CO2 generation unit and the hydraulic oil tank unit are connected through a pipeline; and the heat energy recovery and utilization unit comprises a high-pressure coil pipe and a heat storage medium used for absorbing and storing heat transferred by the high-pressure coil pipe, centralized monitoring and management of equipment are conveniently achieved, and meanwhile the heat energy centralized recovery efficiency and scale benefits are improved.

A pneumatic system for a vehicle, comprising an air compressor for pressurizing an air tank. A flow passage extending from compressor is bifurcated to a first valve and to a second valve. The first valve has a first state preventing air from passing to the air tank, and has a second state allowing air to pass to the air tank. In a first mode of operation of the pneumatic system, the first vale is in said first state and the second valve controls air flow from the compressor to ambient environment. The second valve is configured to change to, or remain in, an open state when the pressure of the air upstream of the second valve is higher than a predetermined threshold, and to change to, or remain in, a closed state when the pressure of the air upstream of the second valve is lower than the predetermined threshold.

An additional hydraulic device for a pitch system of a wind turbine, the additional hydraulic device including a hydraulic motor, a hydraulic accumulator for storing hydraulic energy, a valve unit, a return line and a reservoir. The return line is connected to the reservoir. The valve unit is switchable to a drive switching position, and the hydraulic motor is connected to the hydraulic accumulator in the drive switching position. The energy stored in the hydraulic accumulator drives the hydraulic motor in the drive switching position so that the hydraulic motor delivers an additional force component.

The invention relates to the field of hydraulic pressure, and discloses a hydraulic oil tank and an operation machine. The oil return pipeline is used for returning hydraulic oil to the oil tank body; the oil supplementing pipeline is used for supplementing hydraulic oil into the oil tank main body; the oil filtering device is arranged in the oil tank main body and is provided with a return oil filtering inlet, a supplemented oil filtering inlet and a filtering outlet, the return oil filtering inlet is connected with the oil return pipeline, the supplemented oil filtering inlet is connected with the oil supplementing pipeline, and the filtering outlet is communicated with the oil cavity of the oil tank main body. According to the hydraulic oil tank, the oil cleanliness and the pumping efficiency of the pump can be effectively considered, and the production and manufacturing cost can be reduced. In addition, the space occupied by the hydraulic oil tank can be saved, and meanwhile the overall appearance of the hydraulic oil tank can be more compact and attractive.

The invention discloses a high-low pressure adjustable constant-temperature hydraulic device, and belongs to the technical field of hydraulic equipment, the high-low pressure adjustable constant-temperature hydraulic device comprises an oil tank main body, a pressure compensation mechanism, a pressure relief mechanism, a vacuum mechanism, a condensation mechanism and a heat dissipation mechanism, the top of the oil tank main body is provided with a hydraulic pump, and one end of the hydraulic pump is connected with a pressure gauge; an oil outlet is formed in the other end of the pressure gauge, the hydraulic pump communicates with the interior of the oil tank body, and an oil return opening is formed in the other end of the top of the oil tank body. The device has the beneficial effects that when the internal pressure of the oil tank is increased, redundant air pressure is exhausted to the pressure bin through the connecting pipe, the first piston moves upwards to store air, shell deformation is avoided, when the pressure is normal, the first piston resets to the middle position by means of spring force, and when the pressure is reduced, the connecting pipe generates suction force, the first piston moves downwards, air compensates the air pressure of the oil tank, and balance is kept; the mechanism effectively isolates internal and external air straight-through, and keeps the internal pressure of the oil tank stable.

The invention discloses a hydraulic system and a chemical fiber grade titanium dioxide filter pressing device, and relates to the technical field of hydraulic systems. The hydraulic system comprises a circulating pump, an oil tank and an oil cylinder, an oil inlet pipe is arranged between the oil cylinder and the circulating pump, an oil return pipe is arranged between the oil cylinder and the oil tank, an oil pumping pipe is fixedly connected between the circulating pump and the oil tank, and the hydraulic system further comprises a temporary storage tank fixed to the top of the oil tank and communicated with the lower end of the oil return pipe; and the air exhaust box is fixed to the top of the oil tank and communicates with the temporary storage box through a first electromagnetic valve, and the side wall of the air exhaust box is fixedly connected with a second electromagnetic valve. According to the hydraulic system and the chemical fiber grade titanium dioxide filter pressing device, bubbles in hydraulic oil can be conveniently removed, meanwhile, the cooling efficiency of the hydraulic oil in the oil tank can be higher, the cooling effect is better, and the using effect and the service life of the hydraulic system are guaranteed.