132 results about "Hydraulic accumulator" patented technology

The utility model relates to a buffer device of an actuating mechanism. The buffer device comprises a pneumatic actuator, a buffer block, an energy accumulator, a buffer shell, a buffer piston and a buffer spring, the pneumatic actuator comprises an actuator shell, an actuator upper cover, an actuator piston and an actuator push rod; the actuator piston can axially slide along the inner wall of the actuator shell; a plurality of actuator guide shafts are arranged between the actuator upper cover and the actuator piston; the actuator piston is fixedly connected with the actuator push rod; the buffer block is fixed to the lower end of the actuator shell, and a closed air storage space is formed between the buffer block and the actuator piston. The buffer block is provided with an exhaust port which can be controlled to be opened and closed; the actuator push rod penetrates through the buffer block and is in sliding fit with the buffer block; the buffer shell limits the maximum stroke of downward movement of the actuator piston. The buffer piston is annular and is arranged between the actuator push rod and the buffer shell in a sleeved mode, the upper portion of the buffer piston abuts against the actuator piston, the lower portion of the buffer piston is communicated with an oil discharge channel embedded in the buffer block, and the oil discharge channel is communicated with the hydraulic energy accumulator.

The invention relates to the field of energy accumulators, and discloses a hydraulic energy accumulator fastening and sealing structure which comprises a shell, a cylinder cover is arranged at the top of the shell, a gas conveying pipe is fixedly connected to the middle of the cylinder cover, an oil conveying pipe is fixedly connected to the bottom of the shell, a piston is installed in the shell, and a first annular groove is formed in the middle of the piston; a first annular groove is formed in the piston, a sealing structure is arranged in the first annular groove of the piston, first D-shaped sealing rings are symmetrically arranged on the outer wall of the piston, arc-shaped baffle rings are symmetrically arranged on one sides of the first D-shaped sealing rings, and sliding discs are symmetrically connected to one side of the piston in a sliding mode. The sliding disc slides on the piston, so that the first spring and the second spring are compressed, partial energy storage operation is conducted, the pushing structure is driven to operate, the first D-shaped sealing ring is pushed, the contact stress of the arc-shaped edge of the first D-shaped sealing ring and the inner wall of the shell is increased along with rising of oil pressure, and dynamic sealing compensation is formed.

1. Method 2. The invention relates to a method for producing at least one part of an accumulator housing (10) for a hydraulic accumulator, said method having the following method steps: - providing accumulator housing parts (12, 14) which are to be connected to one another along mutually adjacent end sides (16, 18), of which at least one end side (16) has a material accumulation (20); - moving the adjacent accumulator housing parts (12, 14) together in such a way that the material accumulation (20) comes into contact with the adjacent end side (18); and simultaneously or subsequently - melting the material accumulation (20) by means of a welding process, and further moving the two accumulator housing parts (12, 14) together during the welding process with a predefinable pressing force; and simultaneously - forming a weld seam running along a connecting point (42) between the accumulator housing parts.

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.

An aircraft hydraulic braking system having at least one hydraulic accumulator and a brake actuator. The at least one hydraulic accumulator is the sole source of pressurised hydraulic fluid in the aircraft hydraulic braking system for operating the brake actuator and thereby apply a braking force to a wheel on an aircraft.

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.

The application provides an electric loader distributed hydraulic system using an electro-hydraulic composite cylinder. Mainly includes steering drive subsystem, first pumping device, bucket distributed valve group, bucket electro-hydraulic composite cylinder, second sending device, boom distributed valve group, boom electro-hydraulic composite cylinder, whole vehicle controller, control handle, steering wheel, proportional electromagnetic on-off valve and hydraulic accumulator. By decoupling the steering, boom and bucket devices of the traditional loader, independent and efficient driving of each part is realized. The bypass throttling loss is effectively reduced, the overall machine efficiency is greatly improved, each actuator is not disturbed, the system control difficulty is reduced, the response time is shortened, and the control performance is enhanced. The advantages of electric drive and hydraulic drive are effectively combined, and the performance requirements of the overall vehicle economy and power are effectively improved.

A method of supporting a trailer using a portable trailer stabilizer, the method comprising: (i) contacting a trailer engagement element of a portable trailer stabilizer with a forward end portion of a parked trailer using a tractor coupled to the portable trailer stabilizer; (ii) compressing a hydraulic cylinder containing pressurized hydraulic fluid and directing the pressurized hydraulic fluid to a hydraulic accumulator via an open isolation valve by pressing the trailer engagement element against the forward end portion of the parked trailer to compress the hydraulic cylinder to move the trailer engagement element from the fully extended configuration to a partially extended configuration by positioning the portable trailer stabilizer at least partially beneath and the forward end portion of the parked trailer using the tractor, the hydraulic cylinder operatively coupled to extend the trailer engagement element relative to a support surface engagement element, the isolation valve fluidically interposing the hydraulic cylinder and the hydraulic accumulator; (iii) extending the hydraulic cylinder while maintaining contact between the trailer engagement element and the forward end portion of the parked trailer by lowering the support surface engagement element to engage a support surface beneath the trailer; and (iv) shutting the isolation valve and securing the trailer engagement element against the forward end portion of the trailer by disengaging the tractor from the portable trailer stabilizer, shutting the isolation valve preventing compression of the hydraulic cylinder, where disengaging the tractor from the portable trailer stabilizer actuates a valve operator mechanism operatively coupled to the isolation valve, the valve operator mechanism being operative to open the isolation valve when the portable trailer stabilizer is coupled to the tractor and to shut the isolation valve when the portable trailer stabilizer is uncoupled from the tractor, and where the hydraulic cylinder, the hydraulic accumulator, and the isolation valve are operatively connected in a closed hydraulic system.

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.

The underwater electric control liquid energy accumulator type valve controller comprises a main valve, an energy converter, an energy accumulator arranged in an arc shape, a power center and an oil balancer, and further comprises a pressure regulation and control system. An environment state coefficient, a load state coefficient, a hydraulic medium state coefficient and a response-pressure drop adaptation degree are respectively obtained through an environment state analysis module, a load state analysis module, a hydraulic medium state analysis module and a dynamic performance analysis module, and a target preset pressure of an energy storage device is dynamically adjusted by a pressure optimization module. Self-powered opening and closing and dynamic pressure setting of the valve can be achieved, the system response speed is effectively increased, energy consumption is reduced, and underwater environment adaptability and operation reliability are enhanced.

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.

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).

A portable trailer stabilizer includes a support surface engagement element, a trailer engagement element, a hydraulic cylinder that extends the trailer engagement element relative to the support surface engagement element, an on-board, self-contained energy source including a hydraulic accumulator for the hydraulic cylinder, an isolation valve fluidically interposing the hydraulic cylinder and the hydraulic accumulator, a positioning element engagement element to selectively couple with a trailer stabilizer positioning element of a tractor, and a valve operator mechanism to (i) open the isolation valve when the positioning element engagement element is coupled to the trailer stabilizer positioning element of the tractor, and (ii) shut the isolation valve when the positioning element engagement element is uncoupled from the trailer stabilizer positioning element of the tractor. The hydraulic cylinder, the hydraulic accumulator, and the isolation valve are operatively connected in a closed hydraulic system containing a hydraulic fluid.

The utility model discloses a staggered film punching mechanism of a precision filter, which is characterized in that a bottom surface transverse moving component is arranged right below a film taking device, a film collecting and releasing device is movably connected to the bottom surface transverse moving component, and a film punching device positioned in the film collecting and releasing device is fixedly connected to the upper surface of the bottom surface transverse moving component; a film rolling assembly is fixedly connected to one side of the top end of the film winding and unwinding device, a plurality of diffuse reflection laser sensors used for monitoring films are arranged on the film winding and unwinding device, and a positioning wire and a hydraulic buffer are arranged between one end of the bottom face transverse moving assembly and the side face of the film winding and unwinding device. When the film punching machine is used for punching a film, the film rolling assembly is used for releasing the film, so that the film penetrates through the interior of the film collecting and releasing device, the film punching device is used for punching the film, the material subjected to film punching is taken out through the film taking device, and after the material is taken out, the output end of the electric push rod shrinks, so that the film taking device moves and is adhered to the material on the material conveying belt through the film taking device; automatic film punching is carried out, and the film punching efficiency is improved.

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).

The application relates to the technical field of metal rolling, and discloses a single-roller-driven rolling mill device and a rolling method, which comprise a supporting platform; a lower work roller is arranged on the supporting platform; an upper work roller is arranged on the supporting platform and corresponds to the lower work roller in an up-down mode, so that a roller gap is formed between the upper work roller and the lower work roller; a driving piece output end is connected with the lower work roller; a hydraulic accumulator output end is connected with a reversing piece, the reversing piece is connected with a hydraulic motor, and an output end of the hydraulic motor is connected with the lower work roller. The application solves the problem that the upper work roller and the lower work roller cannot rotate simultaneously to realize biting-in conditions due to the existence of the roller gap when the medium plate rolling mill is single-roller-driven, and can make the rolling piece and the upper work roller and the lower work roller generate sufficient friction and shearing force, increase the 'peak shaving' effect of the unit pressure distribution of rolling, reduce the rolling deformation energy, and thus reduce the energy consumption of the medium plate rolling.

The disclosure relates to a hydraulic accumulator, in particular in the form of a piston-type accumulator, having a separating element which is arranged in an accumulator housing and fluid-tightly separates two fluid chambers, in particular a closed accumulator chamber comprising a working gas and a liquid chamber comprising an operating liquid such as hydraulic oil, from one another, wherein a fluid port is fluidically connected to one of the fluid chambers. The hydraulic accumulator is characterised in that the fluid port has a magnetic-field-generating device which is received in a fixed position in the fluid port and separates magnetizable particles out of the fluid passing through the fluid port, to purify said fluid.

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 artillery weapon (10) comprises a gun carriage (100) and a cannon (200) having a barrel (202) operable to move between an in-battery position and an out-of-battery position. The artillery weapon (10) further comprises a multi-function cylinder (300) mounted to and movable with the cannon (200). The multi-function cylinder (300) comprises a regulator unit (302) including a fluid housing (304) for holding a hydraulic fluid (306), the fluid housing (304) being in fluid communication with a shock absorber system (308), the shock absorber system (308) being configured to deliver fluid to and receive fluid from the fluid housing (304) in response to movement of the barrel (202) relative to the gun carriage (100). The regulator unit fluid housing (304) is in fluid communication with the hydraulic accumulator chamber (310) through a first flow aperture (312). An accumulator piston (314) is also provided that is disposed in the hydraulic accumulator chamber (310) and is operable to move along the hydraulic accumulator chamber (310). The shock absorber system (308), the regulator unit (302), the hydraulic accumulator chamber (310), and the first flow aperture (312) are configured such that displacement of the barrel (202) along the barrel axis (204) from an in-battery position to an out-of-battery position causes fluid flow from the shock absorber system (308) to the fluid housing (304), thereby causing fluid flow through the first flow aperture (312) into the first accumulator antechamber region (316) and moving the accumulator piston (314) in a first direction along the hydraulic accumulator chamber (310), thereby compressing the gas in the second accumulator antechamber region (318).

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 provides an anti-roll device (30) for a motor vehicle. A hydraulic cylinder (32) comprises: an actuating rod (36), a first chamber (40), a second chamber (42), a third chamber (44). The hydraulic circuit (34) comprises: a hydraulic accumulator (46) with hydraulic fluid, a first branch (48) between the first chamber and the hydraulic accumulator, a second branch (50) between the second chamber and the hydraulic accumulator, two valves (52), two non-return valves capable of blocking a flow of hydraulic fluid from the hydraulic accumulator to the cylinder.The hydraulic cylinder comprises a first piston (56) movable relative to the actuating rod and delimiting the first chamber, a second piston (58) movable relative to the actuating rod and delimiting the second chamber, means (60) for driving the actuating rod by the first piston towards the second chamber, and by the second piston towards the first chamber. Figure to be published with the abstract: Figure 2.

A locking unit for a passenger restraint device of an amusement ride passenger unit has a cylinder-piston unit with a piston rod, a hydraulic accumulator and an electronic unit. The electronic unit has a sensor unit for monitoring the position of the piston rod. The electronic unit can be switched to a first measuring mode, wherein the piston rod is at least partially retracted. In the first measuring mode, the electronic unit detects actual positions of the piston rod over a first reference period by means of the sensor unit and compares them with a first limit position range stored in the electronic unit, the electronic unit generating a warning signal in the event of a deviation between the actual positions and the first limit position range. Furthermore, an amusement ride passenger unit includes such a locking unit and a method allows for functional testing of such a locking unit.

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.

A method for checking the state of a hydraulic accumulator having a fluid chamber, which communicates with a hydraulic system supplied with hydraulic fluid from a hydraulic reservoir by a motor-driven hydraulic pump, includes monitoring via a control unit a pressure drop in the hydraulic system in relation to a jump in the pressure curve, which is characteristic of reaching a fully relaxed state of the hydraulic accumulator, when the motor drive of the hydraulic pump is switched off, ascertaining via the control unit a hydraulic pressure corresponding to the jump in the pressure curve, calculating via the control unit a preload pressure exerted by the hydraulic accumulator by starting with the ascertained hydraulic pressure, and concluding via the control unit a malfunction of the hydraulic accumulator when the preload pressure does not reach a specified target value.