69 results about "Hydraulic accumulator" patented technology

The invention discloses a loader and a double-pump two-way interchange energy recovery system of a movable arm oil cylinder of the loader, and relates to the technical field of hydraulic drive of loaders. The system comprises a two-position four-way electromagnetic directional valve, a three-position four-way electromagnetic directional valve, a hydraulic energy accumulator, a third two-position two-way electromagnetic directional valve connected to the hydraulic energy accumulator, a first pump motor, a second pump motor, a first motor and a second motor, wherein oil inlets of the first pump motor and the second pump motor are connected to a hydraulic oil tank, and the first motor and the second motor are in transmission connection with the first pump motor and the second pump motor respectively. The hydraulic oil cylinder is provided with a rodless cavity and a rod cavity, and the first two-position two-way electromagnetic directional valve and the second two-position two-way electromagnetic directional valve are connected to the rod cavity and the rodless cavity respectively; and the two-position four-way electromagnetic directional valve is used for communicating oil outlets of the first pump motor and the second pump motor with the first two-position two-way electromagnetic directional valve and the second two-position two-way electromagnetic directional valve respectively. And the three-position four-way electromagnetic directional valve is used for switching and communicating the third two-position two-way electromagnetic directional valve with the rodless cavity, the rod cavity and an oil inlet of the first pump motor.

An ABS device for a hydraulic braking system of a bicycle or motorcycle, in particular for bicycles, comprises an electrically actuated valve unit (13) which is switchable between a first operating state in which a master cylinder (2) associated with a brake lever is in contact with an actuating cylinder (3) of a brake device and a second operating state in which the connection is interrupted and the actuating cylinder (3) of the brake device is in contact with a fluid accumulator (9).An electronic control (E) is designed to control the position of the moving element (11) of the fluid accumulator (9) both during activation of the ABS function and during deactivation of the ABS function in order to effect: a non-abrupt, but progressive, change in the pressure (CP) in the line (8) connected to the actuating cylinder (3) of the brake device (F), as a function of the rotational speed (ω) of the wheel (R1) to which the brake device is assigned, and as a function of a second parameter, which is the pressure (CP) in the actuating cylinder (3) of the brake device or the deceleration of the vehicle, which is detected or calculated from a sensor assigned to the vehicle.

A method and system for monitoring the performance of a pair of hydraulic accumulators on board an aircraft. The method comprises: collecting (401) pressure values from the accumulators during each of N flights of the aircraft, with N ≥ 2; for each of the N flights, calculating (403) an average pressure value for each accumulator; for each accumulator, calculating (404) an average of the N previously calculated average pressure values; calculating (405) a parameter P which is the absolute value of the difference between the two averages; calculating (408) a leakage indicator which is a function of the difference between the parameter P and a given reference value; and triggering (410) an alert if the indicator is greater than a first predetermined threshold, and not triggering (411) an alert if the indicator is not greater than the first predetermined threshold. This provides reliable monitoring which is easy to implement, so that maintenance alerts can be issued sufficiently in advance.

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

The present application relates to the technical field of hydraulic transmission, in particular to a kind of hydraulic accumulator differential control system, including hydraulic cylinder, electromagnetic reversing valve, transition block, differential counterweight valve, hydraulic control reversing valve, working oil circuit A cavity, working oil circuit B cavity, control oil circuit X1 and control oil circuit X2, the hydraulic cylinder is equipped with rod cavity and rodless cavity;The electromagnetic reversing valve includes oil port P, oil port T, oil port A and oil port B, oil supply line is connected with the oil port P, and oil return line is connected with the oil port T.It realizes the function that single control circuit satisfies multiple complex control requirements by the application of special manufacturing valve and special circuit design, improves system operating performance, reduces production manufacturing cost.

A gas turbine engine fuel supply system includes a fuel manifold, at least one fuel nozzle, and a hydraulic accumulator. The fuel manifold is adapted to receive fuel supplied thereto from a fuel source. The fuel manifold and the fuel have first thermal expansion characteristics. The at least one fuel nozzle is coupled to the fuel manifold and is adapted to inject the fuel supplied to the manifold into a combustor. The hydraulic accumulator is thermally coupled to, and is in fluid communication with, the manifold. The hydraulic accumulator is configured to exhibit second thermal expansion characteristics that are substantially equivalent to the first thermal expansion characteristics.

Hydraulic accumulator, in particular a diaphragm accumulator, comprising at least two housing parts (10, 12) having fluid connection points (48, 50), which are held together by means of a locking ring connection (14) to form an accumulator housing (16) and with a separating element (20) movably arranged within the accumulator housing (16), which separates two media spaces (24, 26) from each other, characterized in that the housing parts (10, 12) are at least partially interlocked along adjacent wall sections (32, 34), one wall section (32) of one housing part (10) projecting over the other (12) to form a circumferential wall (36) towards the environment and encompassing a wall area (38) of the other housing part (12) in such a way that an engagement space (40) is created.which is provided at a point of the transition (42) from one housing part (10) to the other housing part (12) for receiving a retaining ring (44) of the retaining ring connection (14).

2. Hydraulic pressure accumulator, at least comprising a storage housing (10) and a separating device which separates two fluid spaces (12) from each other in the storage housing (10) and has two connection points (16) on the storage housing (10) for the supply and / or discharge of a fluid attributable to the respective fluid space (12), characterized in that at least one connection point (16) is provided with a protective device (26) which at least partially covers the areas subject to corrosion at this connection point (16) and which remains on the pressure accumulator over its lifetime.

This invention discloses a hydraulic system for an electric loader and a hydraulic motor control method. A hydraulic accumulator and pressure sensor are installed on the oil lines connecting the hydraulic pump to the steering system and the working device. A multi-way directional valve without mid-position return oil is also installed to control the connection to the working device. The hydraulic motor is then controlled according to two operating conditions: the working device is not in operation and it is in operation. By setting the accumulator and controlling the hydraulic system pressure threshold, the motor is controlled at a certain speed or torque. This ensures that when the working device is not in operation, the hydraulic pump has the highest efficiency, and there is no overflow or pressure loss along the friction path caused by mid-position return oil. When the working device is in operation, it avoids overflow and inter-valve pressure loss caused by high pressure and low flow rate and by the working device's limit.

The invention relates to a transport stretcher (1) comprising a stretcher (2) and a mobile base (3) for the stretcher (2). The base (3) has a chassis (4) and, opposite it, a receptacle for the stretcher (2). The base (3) has a lifting device (10) for changing the height (h) of the base (3) relative to a direction (R) transverse to the chassis (4). The lifting device (10) has a hydraulic system (11) with a hydraulic accumulator (25) which is hydraulically connected to a lifting cylinder (12) of the lifting device (10). The hydraulic accumulator (25) has an internal fluid pressure chamber (27) for receiving hydraulic fluid, and an overpressure is maintained in the fluid pressure chamber (27) of the hydraulic accumulator (25) during operational readiness.The invention further relates to a base frame (3) for a stretcher (2) for forming a transport stretcher (1), a lifting device (10) for a transport stretcher (1) and / or for a base frame (3) and a method for controlling a transport stretcher (1).

This invention discloses a high-energy-density dual-piston hydraulic accumulator and its working method, belonging to the field of hydraulic energy storage technology. It includes a variable-diameter dual-piston chamber formed by the combination of two piston chambers, one smaller and one larger. Each dual-piston chamber contains two interconnected pistons connected by a connecting mechanism, dividing the variable-diameter dual-piston chamber into three chambers: upper, middle, and lower. Oil ports are located at the top and bottom of each chamber. A gas cylinder is connected to the side of the larger piston chamber near the smaller piston chamber via a pipeline, thus making the upper and lower piston chambers oil chambers and the middle piston chamber a gas chamber. Due to the smaller diameter of the upper chamber and the larger diameter of the lower chamber, the rod rises, reducing the volume of the middle piston chamber and compressing the air in the middle piston chamber for energy storage. Its structure is simple, small in size, low in cost, and its energy density is twice that of traditional accumulators.

The invention relates to a hydraulic system 1 for a passenger restraint system, comprising a hydraulic pump 6 and at least one hydraulic section 5 having a hydraulic accumulator 9, a valve device 8 and a hydraulic cylinder unit 10 with a piston 11. A valve arrangement 8 is connected to the hydraulic pump 6, the hydraulic accumulator 9 and the hydraulic cylinder unit 10. The valve arrangement 8 is controllable by an advanced control unit 30, wherein the piston 11 is movable between open and closed positions. The hydraulic pump 6 is configured to pressurize the hydraulic cylinder unit 10 by switching the valve device 8 to the open switching position so that the piston 11 moves from the closed position to the open position. The hydraulic accumulator 9 is configured to pressurize the hydraulic cylinder unit 10 by switching the valve device 8 to the closed switching position such that the piston 11 moves from the open position to the closed position. The advanced controller 30 is connected to the manually operable sensor system 31, where the advanced controller 30 switches the valve device 8 to the closed position when the manually operable sensor system 31 is actuated.

The application relates to an excavator energy recovery system based on an accumulator-assisted oil supplementing function and relates to the technical field of excavator driving. The system comprises a hydraulic cylinder, a three-position four-way electromagnetic valve, a hydraulic pump, a motor connected to the hydraulic pump in a transmission mode, a first two-position two-way electromagnetic valve connected to an oil return port T of the three-position four-way electromagnetic valve, a second two-position two-way electromagnetic valve connected between the first two-position two-way electromagnetic valve and a hydraulic oil tank, a hydraulic accumulator connected to the first two-position two-way electromagnetic valve, a third two-position two-way electromagnetic valve connected to the hydraulic accumulator and a fourth two-position two-way electromagnetic valve. The oil inlet of the hydraulic pump is connected to the hydraulic oil tank and the fourth two-position two-way electromagnetic valve. The oil outlets A and B of the three-position four-way electromagnetic valve are respectively connected to the rod cavity and the rodless cavity of the hydraulic cylinder, and the oil inlet P is connected to the oil outlet of the hydraulic pump and the third two-position two-way electromagnetic valve. When the hydraulic cylinder is retracted, energy is stored through the hydraulic accumulator. When the hydraulic cylinder is extended, oil is supplemented through the hydraulic accumulator.

The invention relates to a turbomachine module comprising: - variable-pitch blades; - a power shaft (7) driving the blades via a speed reducer (9); - a pitch-changing system (15) comprising a linkage mechanism (16) connected to the blades and a control means (17) acting on the linkage mechanism (16); and - a pressurized fluid supply system (19) comprising a main circuit (21) for supplying the control means, the main circuit comprising a main feed pump (22) connected to a power source (18) and driven by the power shaft. According to the invention, the supply system comprises a hydraulic accumulator (27) storing hydraulic fluid, the hydraulic accumulator (27) being connected to the main circuit and intended to supply the control means when the main feed pump is inactive for driving the blades into the feathered position.Figure for the abbreviation: Figure 2.

This invention discloses an automatic parking control system and method for forklifts on ramps, belonging to the field of forklift control technology. The hydraulic control section includes a hydraulic accumulator; the hydraulic accumulator is connected to a second control valve, which is connected to a first control valve, and the first control valve is connected to a parking actuator. The electrical control section includes an electronic controller and a parking switch; the electronic controller is electrically connected to an angle sensor, a speed pedal, an indicator light, a control unit, and the second control valve; the control unit includes a control section and an execution section, the control section of the control unit is electrically connected to the electronic controller, and the output of the execution section of the control unit is electrically connected to the first control valve; the parking switch is electrically connected between the indicator light and the input of the execution section of the control unit. This invention achieves automatic parking when the forklift is on a ramp, with stable and reliable control, improving driver safety on ramps, reducing driving risks, and minimizing accidents when the forklift is on a ramp.

There is disclosed a liquefied gas cargo carrier emergency valve drive system, comprising one or more hydraulic accumulators configured to provide hydraulic fluid to emergency valves controlling the handling of a liquefied gas cargo on the carrier, and a hydraulic pressure intensifier configured for storing the hydraulic fluid in the one or more hydraulic accumulators at a pressure above 150 barg.

A method for monitoring the performance of a pair of hydraulic accumulators of an aircraft includes: collecting pressure values from the accumulators during each of N flights of the aircraft, where N≥2; for each of the N flights, calculating a mean pressure value for each of the accumulators; for each of the accumulators, calculating a mean of the N previously calculated mean pressure values; calculating a parameter P which is the absolute value of a difference between the two mean values; calculating a leak indicator which is a function of a difference between the parameter P and a given reference value; and triggering an alert if the indicator is greater than a first predetermined threshold, and not triggering an alert if not.

The invention relates to a hydraulic accumulator, in particular a diaphragm accumulator, at least consisting of two housing parts (10, 12) which are held against one another by means of a fixing ring connection (14) so as to form an accumulator housing (16), and having a separating element (20) which is arranged at least partially movably within the accumulator housing (16) and which separates two fluid chambers (24, 26) from one another, characterised in that, in the fixed state of a fixing ring (32) of the fixing ring connection (14), said fixing ring is completely covered towards the environment (34) by the housing parts (10, 12).

The invention relates to a universal logic circuit for electro-hydraulic actuators. A universal control circuit (500) for an electro-hydraulic valve actuator system (105, 105', 105") comprising logic gate circuits for controlling one or more of a closing solenoid valve (6), an opening solenoid valve (5), an emergency closing solenoid valve (17) and a hydraulic fluid pump (3) motor (2) to direct hydraulic fluid through a hydraulic circuit in accordance with a received command to thereby actuate a valve by an electric actuator (100). The universal control circuit (500) is configured to control operation of a plurality of different configurations of the electro-hydraulic valve actuator system, including a double acting configuration (105', 105"), a single acting spring opening configuration (105) and a single acting spring closing configuration (105), each of which has or does not have an emergency closing device (which can be configured to trip based on a separate external shutdown input or in combination with a local system power failure), a hydraulic accumulator (40) and a hold or transient input command.

A hydraulic turbine includes a hydraulic drive and a hydraulic accumulator. Fluid from a supply tank is pumped into the hydraulic drive through a supply pipe. The fluid flow into a fluid reservoir of the hydraulic accumulator through a flow amplifier of the hydraulic accumulator. The flow amplifier rotates within the fluid reservoir to generate a vortex of the fluid within the fluid reservoir, thereby generating a pressurized flow of the fluid. The pressurized flow of the fluid flows from the hydraulic accumulator through one or more helical pipes of the hydraulic drive. Baffles within the helical pipes redirect the pressurized flow as it flows through the hydraulic drive, thereby applying a force to the helical pipes and imparting rotational motion to the hydraulic drive. The hydraulic drive is coupled to a generator for converting the rotation of the hydraulic drive to an electrical energy output.

The invention belongs to the technical field of piston pumps, and particularly discloses a piston pump and an organic fluorine intermediate circulating method.The piston pump comprises a shell and a controller, a motor is arranged on one side of the shell, an auxiliary assembly is arranged on the surface of the shell, and a plugging cavity is formed in the shell; and the pressure in the driving cavity is regulated and controlled in real time through the hydraulic energy accumulator, so that the pressure is always higher than the suction pressure of the organic fluorine intermediate medium. The invention further discloses a process of the piston pump. The positive pressure difference design fundamentally changes the state that a driving cavity of a traditional structure is low in pressure and easy to suck an organic fluorine intermediate medium, the highly-corrosive and highly-permeable organic fluorine intermediate medium is effectively prevented from leaking to a driving mechanism, the pump head is provided with a detection area and a second hydraulic sensor, pressure changes caused by trace leakage can be sensitively captured, and the detection accuracy is improved. Once an abnormality is found, shutdown and alarm are immediately carried out, and a leakage accident is killed in the bud, so that the safety and reliability of equipment operation are greatly improved.

The present invention relates to a hydraulic turbocharged engine with automatic start-stop functionality. Systems and methods are provided for a vehicle engine including a turbocharger coupled to a hydraulic pump and a hydraulic accumulator. In one example, a method can include supplying pressure from an accumulator coupled to a hydraulic pump to a hydraulic braking system of a vehicle in response to the vehicle coming to a stop, the hydraulic pump being coupled to a shaft of a turbocharger of an engine mounted within the vehicle and automatically shutting down the engine when the vehicle is stopped.

The application discloses a rock drill test bed, which comprises a reduction gearbox and an energy absorber connected with a first sensor, the reduction gearbox is connected with a drill rod, the drill rod is connected with a simulated drill bit arranged correspondingly with the energy absorber, the energy absorber comprises a hydraulic cylinder connected with a hydraulic accumulator, a hydraulic rod is arranged in the hydraulic cylinder, the hydraulic rod divides the hydraulic cylinder into a nitrogen cavity and a hydraulic oil cavity, the hydraulic rod is extended from the hydraulic oil cavity, a rock drill to be tested is connected with the reduction gearbox, the simulated drill bit in a working state rotates or knocks on the hydraulic rod, and the first sensor detects the stress of the energy absorber. The rock drill test bed can simulate the advancing resistance, rotating resistance and impact breaking resistance of rocks generated in the rock drilling process of a rock drilling jumbo, and the response capability is improved by using nitrogen energy absorption.

A suspension system configured to exhibit low variance in vehicle ride frequency over a large range of vehicle loads. The suspension system includes a strut having a cylinder and a piston configured to reciprocate in the cylinder. The suspension system also includes a vessel coupled to the strut, and a valve in an interior chamber of the vessel. The valve divides the interior chamber into a first liquid volume and a second liquid volume. The suspension system also includes a hydraulic accumulator having a volume and a liquid volume. The suspension system further includes a compressible liquid in the cylinder, the first liquid volume in the vessel, and the second liquid volume in the vessel, and a spring element in the volume of the hydraulic accumulator.

The invention discloses an engineering machinery hybrid power system and a control method thereof. The engineering machinery hybrid power system comprises a walking system, an operation system, an energy storage auxiliary system and a controller. The energy storage auxiliary system selectively conveys and recycles oil liquid to the walking system or the operation system under regulation and control of the controller. The system is provided with a light-load electric drive mode and a heavy-load hybrid drive mode, the system is mainly driven by a motor during light load, and when the power of a heavy-load subsystem exceeds the maximum power of the motor, the hydraulic energy accumulator assists in supplementing. In the energy recovery stage, energy can flow back through the regeneration path. The problems that an existing electro-hydraulic hybrid driving system is large in installed power and high in cost are solved, the rated power of the motor is reduced, and the equipment size and energy consumption are reduced; the energy recovery and utilization efficiency is improved, and invalid energy waste is reduced; meanwhile, through assistance of the energy accumulator, the dynamic response of the system at the high-load moment is enhanced, the operation continuity is improved, the operation period is shortened, and efficient coordinated distribution of energy of multiple subsystems is achieved.

The application relates to an energy accumulator air pressure detection method and system, a storage medium and an intelligent terminal, relates to the field of energy accumulator function detection technology, and comprises the following steps: receiving a detection instruction; when the detection instruction is received, a first electromagnetic valve in a hydraulic system is controlled to be closed to control the disconnection between a high-pressure oil source and a hydraulic energy accumulator, a second electromagnetic valve in the hydraulic system is controlled to be opened to control the energy accumulator in the hydraulic system to discharge oil; the inflation pressure is obtained; when the inflation pressure no longer changes, the inflation pressure and a set value are compared to obtain a comparison result; based on the comparison result, a corresponding adjustment scheme is found from an operation database and the adjustment scheme is executed, the application has the advantages that the opening and closing of corresponding pipelines are controlled through electromagnetic valves, automatic detection is realized, the reading can be obtained through online reading, automatic adjustment is realized, human cost is saved, and the detection efficiency is improved.

The invention relates to a battery system (1) for at least one tamping assembly (9), comprising a motor-hydraulic pump unit (2), a hydraulic accumulator (3), and measuring units (4), arranged to provide a hydraulic medium having a hydraulic supply pressure (pV) for hydraulic actuators (94) of the tamping assembly (9), wherein the motor-hydraulic pump unit (2) is designed to be adjustable and enables a change in the delivery flow of hydraulic medium to the hydraulic actuators (94) by means of the hydraulic pump (221), wherein a controller unit (7) for controlling the delivery flow is connected to an actuating unit (225) of the motor-hydraulic pump unit (2) and signal lines of the measuring units (4) are connected to inputs of the controller unit (7), wherein an output of the controller unit (7) is connected to an input of the actuating unit (225) of the motor-hydraulic pump unit (2) for pilot control, a storage unit (73) and an evaluation unit (74) are arranged for storing and evaluating an operating requirement for hydraulic supply pressure (pV) and / or the volume flow of the hydraulic medium in the tamping unit (9), as detected by the measuring units (4), and the controller unit (7, 72) is also designed to compensate for deviations from the hydraulic medium volume flow and / or the hydraulic supply pressure (pV) predicted by means of the evaluation unit (74).

The utility model discloses an electro-hydraulic direct drive transmission device convenient to assemble, which belongs to the field of actuators and comprises a main body mechanism, a fixing mechanism is mounted in the middle of the main body mechanism, an assembling mechanism is mounted in the middle of the main body mechanism and positioned above the fixing mechanism, and a hydraulic energy accumulator is mounted in the middle of the assembling mechanism. The assembling mechanism comprises an adjusting clamping ring, a T-shaped rod is fixedly installed at the lower end of the adjusting clamping ring, a connecting block is fixedly arranged at the lower end of the T-shaped rod, and a threaded hole is formed in the connecting block. The complex step that a plurality of parts of the hydraulic energy accumulator need to be separately fixed is solved, on the basis, the hydraulic energy accumulator and the adjusting clamping ring are movably connected, assembly is convenient, meanwhile, disassembly is relatively convenient, and therefore the hydraulic energy accumulator is more convenient to overhaul and replace.