98results about "Actuator accumulators" patented technology

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.

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.

A flow-through folding membrane accumulator comprises a hollow cylindrical housing and a folding flexible membrane disposed in an interior volume of the housing. The membrane defines an interior liquid channel extending through the membrane along a longitudinal axis, and liquid coolant flows from an inlet of the accumulator through the interior liquid channel to an outlet of the accumulator. The membrane is sealed to the housing such that an air-tight cavity filled with a gas is formed between the housing and the membrane. The cavity radially surrounds the internal liquid channel, with the membrane separating the cavity and the internal liquid channel. Volumes of the cavity and channel change in response to deformation of the membrane and based on pressures of the liquid coolant. The membrane may comprise multiple folds extending parallel to the longitudinal axis and distributed circumferentially around the axis.

An accumulator assembly is interposed hydraulically between a source of pressurized fluid and at least one wheel brake of a corresponding first or second pair of wheels. The accumulator assembly includes a medium pressure accumulator, a nonpowered MPA fill valve interposed fluidically between a pump-side passage of the medium pressure accumulator and the source of pressurized hydraulic fluid, a powered MPA one-way valve interposed fluidically between a brake-side passage of the medium pressure accumulator and the at least one corresponding wheel brake, and an MPA check valve interposed fluidically between the brake-side passage of the MPA cavity and the at least one corresponding wheel brake. An electronic control unit is provided for controlling at least one of the secondary brake module and the master cylinder responsive to at least one braking signal. The accumulator assembly facilitates a non-powered evac / fill phase of lifetime operation of the brake system.

To further improve a pressure accumulator of a liquid pressure assembly of a vehicle brake device, especially improve the behavior of a pressure accumulator at a cut-off border portion of a medium between a fluid chamber and an accumulation chamber.SOLUTION: In a pressure accumulator (34) of a liquid pressure assembly of a vehicle brake device equipped with a piston (44) and a packing sealing the piston (44) with respect to a piston guide (42), the packing is configured to include an elastomer ring (64) held by the piston (44). A layer ring (66) is provided, which is held by the piston (44) and is pressed against the piston guide (42) by the elastomer ring (64).SELECTED DRAWING: Figure 4

The invention belongs to the technical field of underwater operation, and particularly relates to an embedded plough cable pressing device hydraulic system which comprises a first valve block, a second valve block, an energy accumulator and a pressure monitoring unit. The first valve block comprises a first electric proportional reversing valve, a first balance valve, a second balance valve, a first electromagnetic reversing valve and a second electromagnetic reversing valve; the second valve block comprises a second electric proportional reversing valve, a throttling valve and a pilot hydraulic control one-way valve. The pressure monitoring unit is used for monitoring the internal pressure of the energy accumulator. The requirement for the working volume of the energy accumulator can be lowered, control over the oil cylinder of the cable pressing device under various working conditions can be achieved, the oil cylinder can be actively controlled to stretch out and draw back to complete cable loading, cable unloading and other operations, the oil cylinder can be passively retracted to protect the cable when the external load is too large, automatic reset is achieved when the load is reduced, and the service life of the cable pressing device is prolonged. And the situation that the oil cylinder cannot extend out due to too low pressure of the energy accumulator caused by oil leakage can be avoided.

A load dampening system 60 for a working vehicle is provided. The load dampening system comprises a load handling hydraulic actuator 28 configured to support a load carried by the working vehicle and an accumulator apparatus 100 for storing pressurised hydraulic fluid. The accumulator apparatus is selectively connectable to the load handling hydraulic actuator to act as a compliant element which dampens pressure fluctuations in the load handing hydraulic actuator. The load dampening system also comprises a control system 70 configured to adjust a compliance of the accumulator apparatus to adjust the extent to which the accumulator apparatus dampens pressure fluctuations in the load handling hydraulic actuator.

Example implementations relate to a pressure regulator assembly for a closed fluid loop of a CDU. The pressure regulator assembly has a cylinder having an internal volume, and first and second hollow pistons slidably connected to the cylinder to split the internal volume into a first volume portion having cooling fluid, a second volume portion having driver fluid, and a third volume portion having compressible matter. The first volume portion is fluidically connected to the closed fluid loop. The first hollow piston is reciprocated by the compressible matter to maintain operating pressure of the cooling fluid in the closed fluid loop. The second hollow piston is driven by the driver fluid in response to predefined pressure drop of the cooling fluid during predefined time period, to inject additional cooling fluid from the first volume portion into the closed fluid loop to restore pressure level of cooling fluid to operating pressure.

An example electrohydraulic actuator includes: a housing; a hydraulic cylinder actuator disposed within the housing and comprising a cylinder and a piston, wherein the piston divides an internal space of the cylinder into a first chamber and a second chamber, and wherein the hydraulic cylinder actuator is unbalanced; an accumulator disposed within the housing and comprising an annular fluid chamber encircling the cylinder of the hydraulic cylinder actuator, wherein the accumulator is configured to provide boost fluid flow or receive excess fluid flow comprising a difference between the first fluid flow rate and the second fluid flow rate; and an assembly disposed within the housing and comprising: (i) a pump configured to be a flow source, and (ii) an electric motor configured to drive the pump to provide fluid flow to the first chamber or the second chamber of the hydraulic cylinder actuator to drive the piston.

The invention relates to an apparatus (1) comprising a plurality of tools (2) each having at least one hydraulic chamber (6) for hydraulic liquid, and a hydraulic manifold (4) configured for storing pressurized hydraulic liquid and supplying hydraulic liquid to said plurality of tools (2), wherein each tool (2) comprises a communication conduit (7) extending between the hydraulic chamber (6) and said hydraulic manifold (4), the hydraulic chamber (6) having varying volume during the operation of the tool (2). The apparatus (1) is characterized in that each tool (2) comprises a hydraulic buffer unit (8) for preventing propagation of hydraulic pulsations between the tool (2) and the hydraulic manifold (4) in response to the varying volume of the hydraulic chamber (6), wherein the hydraulic buffer unit (8) has a buffer chamber (9) having varying volume in response to varying volume of the hydraulic chamber (6).

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 relates to a manual emergency operating system for a scientific research crane, comprising an emergency operation valve assembly, an accumulator, a winch valve assembly, and a remotely adjustable relief valve assembly. The emergency operation valve assembly is connected to the accumulator and, through the winch valve assembly, to the winch motor and winch brake, for manual emergency operation of the winch motor and winch brake. The remotely adjustable relief valve assembly is connected to the winch valve assembly for remotely adjusting the resistance during load lowering. In an emergency, this invention allows the crane operator to lower the load with low resistance manually, and allows the hook to move away from the crane. This reduces the impact of structural damage to the crane and the impact of load release on the hull. Furthermore, the manual operation allows for assessment of the situation of personnel near the crane, ensuring the safety of on-site personnel.

The invention discloses a piston type energy accumulator position detection mechanism and a control method thereof. The detection mechanism comprises a cylinder body, an end cover, a piston, a sleeve rod, a displacement sensor, a magnetic rod, an extension rod and a magnetic ring. The extension rod moves along with the piston, and a magnetic rod fixed on the displacement sensor is accommodated in a hollow cavity in the extension rod; the magnetic ring is fixed to the end of the extension rod. The displacement sensor measures the position of the piston in a non-contact mode by detecting the magnetic field change of the magnetic ring based on the magnetostriction or Hall effect principle. The device is further provided with a swing detection unit, radial deviation of the magnetic ring is detected through a Hall sensor arranged in the circumferential direction, and safety valves on the two sides of the sleeve rod are controlled to conduct directional exhaust according to the radial deviation, so that measurement errors caused by swing are compensated. The mechanism solves the problems that a traditional stay wire type sensor is prone to fatigue damage and a laser sensor is prone to pollution and failure, has the advantages of being compact in structure, convenient to install, high in anti-interference performance, long in service life and high in precision, and is suitable for piston position real-time monitoring and anti-collision protection under the high-frequency reciprocating working condition.

The present invention relates to a reservoir piston arrangement (10) according to the features of claim 1. A reservoir piston arrangement (10) is a pressure medium reservoir of an electronically slip-controllable vehicle brake system, which is used for intermediate storage of pressure medium released from wheel brakes within the context of brake pressure control. In particular in electrically powered vehicles, such a pressure medium reservoir is used for each braking process. In this case, a reaction pressure as low as possible of this pressure medium reservoir is particularly important, since this promotes the efficiency of the recuperation of braking energy, reduces friction between the reservoir piston arrangement (10) and the associated receiving parts, and minimizes wear on the guides and / or seals of the reservoir piston. For this purpose, a reservoir piston arrangement (10) is proposed which has a reservoir piston (12) with a first guide ring (14a) on a first circumference of a first skirt section (18a), which surrounds the piston skirt (18) and projects radially above a second skirt section (18b) of the piston skirt (18) which is larger in terms of its outer dimensions.

The invention relates to a piston accumulator having an accumulator housing (10) in which a separating piston (12) is longitudinally movably guided which separates two fluid chambers (14, 16), in particular separates a fluid chamber (14) having a working gas from a further fluid chamber (16) having an operating fluid, such as hydraulic oil, and which separating piston has a damping device (18), characterised in that, in addition to the damping device (18), an inflow device (20) is provided which interacts with the damping device (18) for damping a fluid flow out of the accumulator housing (10) by forming a throttle along a fluid path (22) and which releases a further fluid path (24) by bypassing the other fluid path (22) that has the throttle in order for fluid to flow into the accumulator housing (10).

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.

A fluid circuit includes: a fluid supply device that delivers a working fluid; and an accumulator that accumulates the working fluid which is increased in pressure. A variable throttle valve and the accumulator are disposed in a branch flow passage branched from a main flow passage extending from the fluid supply device to an actuator. A first pressure detector is provided between the variable throttle valve and the accumulator, a second pressure detector is provided in the branch flow passage between the main flow passage and the variable throttle valve, and the variable throttle valve is controllable based on pressures detected by the first pressure detector and the second pressure detector. A check valve is provided in the branch flow passage.

The invention relates to a hydropneumatic accumulator (1), comprising: - an enclosure (2) formed by a first half-shell (3) and a second half-shell (4) that are screwed to one another by means of a first thread (6) and a second thread (8) arranged on the first half-shell and on the second half-shell, respectively; and - a membrane that is pinched between the first half-shell (3) and the second half-shell (4); the first thread (6) and the second thread (8) have the following characteristics: - a pitch P; - an angle α formed by the engagement flank (22), which is between 15° and 35°; - an angle β formed by the load-bearing flank (23), which is between 5° and 10°; - a radius of curvature R of the root (25), which is between 0.15 P and 0.25 P; - a width L, which is between 0.20 P and 0.40 P; and - a distance D1, which is greater than or equal to the sum of the height H and of the radius of curvature R.

The utility model relates to equipment for volume compensation, which at least comprises an equipment shell (10) and a compensation element (12) capable of being movably guided in the equipment shell, the compensation element can be supported on an energy accumulator (14) in a manner of being loaded by fluid pressure (p), and the equipment is characterized in that the equipment shell (10) is provided with at least two shell parts (16 and 18), the utility model relates to a device housing (10) comprising housing parts (16, 18) which are arranged one after the other when viewed along a longitudinal axis (20) of the device housing (10), the free cross-sections of the housing parts (16, 18) adjacent to one another differ, and wherein the transition of one housing part to the next adjacent housing part is implemented in the form of a step (22).

A pneumatic accumulator may be fluidly coupled between a negative-pressure source and a dressing of a therapy system. The pneumatic accumulator may have a small volume and one or more deformable members that can deform under negative pressure, reducing the volume of the pneumatic accumulator. The pneumatic accumulator can smooth a pressure wave created by the negative-pressure source. The pneumatic accumulator may also provide additional negative-pressure storage capacity to the therapy system. For example, if a leak develops at the dressing, some of the negative pressure stored in the pneumatic actuator may be supplied to the dressing. The pneumatic accumulator may allow for reduced runtime of the negative-pressure source, leading to increased electrical efficiency.

This invention relates to the field of work machinery technology, and discloses an automatic lubrication device for work machinery and the work machinery itself. The automatic lubrication device for work machinery includes: a hydraulic drive unit with an oil outlet; an accumulator connected to the oil outlet via a first oil passage; a lubrication tank including a tank body and a piston disposed within the tank body, the piston dividing the tank body into a first chamber and a second chamber; the first chamber connected to the accumulator via a second oil passage, and a first check valve and / or a first switching valve disposed on the second oil passage; a hydraulic oil tank connected to the first chamber via a third oil passage, and a second switching valve disposed on the third oil passage; a lubrication oil tank connected to the second chamber via a fourth oil passage, and a third switching valve disposed on the fourth oil passage; and an oil injector connected to the second chamber via a fifth oil passage, and a second check valve and / or a fourth switching valve disposed on the fifth oil passage. This invention reduces the manufacturing cost of the device by reducing the number of pumps in the automatic lubrication device.

A method of assembling an accumulator for a suspension damper, wherein the method includes the steps of forming a housing for the accumulator, assembling a bellows assembly by connecting a distal plate and a proximal plate to opposite ends of an annular bellows wall, and inserting the bellows assembly into the housing. The housing is formed such that it includes a distal end having an end wall and an open end opposite the distal end. The bellows assembly is inserted into the open end of the housing in an orientation with the distal plate facing the end wall of the housing. The method continues with coupling the distal plate of the bellows assembly to a stem of a charge port on the end wall of the housing at a fixed axial location using a fixture that engages the stem of the charge port.

An apparatus and method provide a barrier in the cooling airflow of a component of a computing device that, when the barrier is extended, impedes the airflow, thereby diverting excess cooling airflow from the component to a different component with a different flow path. In response to increased pressure from the airflow, the barrier retracts to permit a greater airflow. Embodiments respond to an increase or decrease in airflow without requiring additional control input and include barriers that deform or pivot in response to increased pressure to permit greater airflow.

2. Hydraulic accumulator, comprising at least two accumulator housing parts (24, 26) which are firmly connected to each other along a circumferential weld (28) applied from the outside of the accumulator housing (10) and with a cover ring (34) which, in the manner of a weld pool seal, covers the circumferential weld (28) on the inside (36) of the accumulator housing (10) in such a way that the introduction of foreign material, as occurs during the welding process, onto the inside (36) of the accumulator housing is prevented, characterized in that, in order to increase the fatigue strength at the circumferential weld (28), individual parameters of the weld pool seal in the form of the cover ring (34) are modifiable, such as its - Position on the inside (36) of the memory housing (10), - constructive design and / or - material selection concerning him.

The invention relates to an accumulator piston device (10) according to the features of claim 1. Accumulator piston devices (10) are used in pressure medium accumulators of electronically slip-controllable vehicle braking systems in order to temporarily accumulate pressure medium which is released from wheel brakes in the course of regulating the brake pressure. In particular in electrically driveable motor vehicles, pressure medium accumulators of this type are used in every braking operation. This depends, inter alia, on as low a response pressure of said pressure medium accumulator as possible because the efficiency of recovering braking energy requires reducing friction between the accumulator piston device (10) and an associated receptacle and minimizing wear at the accumulator piston guide and / or seal. What is proposed for this purpose is an accumulator piston device (10) having an accumulator piston (12) which, on a circumference of a first skirt portion (18a), has a first guide ring (14a) which surrounds the piston skirt (18) and which protrudes radially over an externally dimensionally larger second skirt portion (18b) of the piston skirt (18).

The invention relates to the technical field of fluid transmission and control, in particular to an adjustable energy accumulator which comprises a cylinder barrel, and a liquid end assembly and a gas end adjusting assembly are arranged at the bottom end and the top end of the cylinder barrel respectively. A piston screw rod and a piston are arranged in the cylinder in a sliding manner to tightly divide an inner cavity into an air cavity and a liquid cavity; the extending end of the piston screw is provided with a mounting disc and an air cavity setting device with a scale strip, and is matched with a screw driving device for use; by means of the self-locking characteristic and rigid supporting of screw transmission, continuous and accurate adjustment and mechanical locking of the volume of the air cavity are achieved, and the defects that a traditional device is complex in adjustment and not suitable for variable working conditions are effectively overcome. And meanwhile, the position of the internal piston is visually fed back in real time through the external scale strip, the energy storage state can be monitored without a sensor, and the device has the advantages of high adjusting precision, high vibration resistance, convenience in operation and the like.

The invention discloses a hydraulic control system of an energy accumulator, and relates to the technical field of energy accumulators. The device comprises a shell, a fixing block is fixed to an upper end opening of the shell, an inflation pipe is arranged in the fixing block, one end of the inflation pipe extends into an inner cavity of the shell and is connected with a leather bag, the other end of the inflation pipe is communicated with a U-shaped pipe, the U-shaped pipe is filled with measuring liquid, the right side of the lower surface of the U-shaped pipe is communicated with a liquid guide pipe, and the lower end of the liquid guide pipe is connected with a liquid collecting bottle. A rubber plate is movably arranged in an inner cavity of the liquid collecting bottle, a reset spring is connected between the lower surface of the rubber plate and the inner wall of the liquid collecting bottle, the right end of the U-shaped pipe communicates with an air conveying pipe, and a first breathable waterproof film and a second breathable waterproof film are arranged on the left side and the right side in the U-shaped pipe correspondingly. The internal measuring liquid is drawn to the right side and enters the liquid collecting bottle under the action of the liquid guide pipe, and the quantitative storage and release of the pressure oil in the energy accumulator are controlled by controlling the content of the measuring liquid flowing into the liquid collecting bottle, so that the use is convenient.

The invention discloses an energy accumulator nitrogen bag connecting device and a connecting method thereof, and relates to the technical field of nitrogen bag connection. According to the technical scheme, the energy accumulator nitrogen bag connecting device comprises a bag body, a valve is connected to an outlet of the bag body, a flexible hose is connected to an outlet of the valve, and a sealing assembly is arranged on the flexible hose and comprises a sealing ring; an outlet of the flexible hose is connected with a connecting pipe. The technical scheme has the beneficial effects that the valve body of the valve is machined into the plane, the groove is formed in the flexible hose, the sealing ring is installed in the groove of the flexible hose, the sealing ring can be accurately positioned and limited in the groove due to the design of the groove, meanwhile, the flexible high-pressure hose has good vibration reduction performance, and the service life of the flexible high-pressure hose is prolonged. Vibration and impact generated in the operation process of equipment can be absorbed and buffered, the problem of stress concentration caused by rigid connection is fundamentally solved, and the dynamic load borne by the pipeline connector is greatly reduced.