994 results about "Hydraulic fluid" patented technology

Heat exchangers for cryogenic fuel distribution systems and related methods are disclosed herein. An example aircraft disclosed herein includes a cryogenic fuel system including a cryogenic fuel, a hydraulic system including a hydraulic fluid, a gas turbine engine fluidly coupled to the cryogenic fuel system, and a heat exchanger fluidly coupled to the cryogenic fuel system, the heat exchanger is used to exchange heat between the cryogenic fuel and at least one of (1) hydraulic fluid or (2) working fluid thermally coupled to the hydraulic system.

An apparatus for operating a load-controlled hydraulic supply of an agricultural tractor includes a hydraulic pump which is adjustable with respect to the displacement volume for supplying pressurized hydraulic fluid, a proportional valve which is electrically actuatable, a primary hydraulic consumer to carry out a superordinate hydraulic function and to be directly connected to a conveying outlet of the hydraulic pump, a secondary hydraulic consumer to carry out a subordinate hydraulic function and to be connected to the conveying outlet of the hydraulic pump via the proportional valve, and a control unit configured to move the proportional valve into a closed valve position when the control unit recognizes that at least one of a required power of the primary and secondary hydraulic consumers exceeds the conveying capacity of the hydraulic pump and the subordinate hydraulic function of the secondary hydraulic consumer is inactive.

The invention relates to the technical field of intelligent control of heavy equipment, in particular to a hydraulic synchronous intelligent control system for segmented turnover of an overweight steel structure, and discloses the hydraulic synchronous intelligent control system for segmented turnover of the overweight steel structure. According to the system, full-field strain data of a structure surface is acquired by deploying a flexible grid sensor array, and a deformation gradient topological graph is constructed to identify an instability risk area. And a dynamic fluid network model of the hydraulic system is established, fluid-solid coupling simulation is carried out in combination with deformation characteristics, and pressure pulsation transmission paths under different control instructions are predicted. And the system dynamically optimizes a data sampling strategy and network model parameters according to a prediction path, generates a hydraulic cylinder coordination action instruction subjected to pressure balance verification, and finally drives an execution mechanism to complete turnover operation. According to the scheme, full-field real-time sensing of structural deformation and dynamic coupling prediction control of hydraulic fluid are achieved, and the safety and control precision of the overweight component in the turnover process are improved.

A hydraulic system includes a prime mover, a variable displacement first hydraulic pump to be driven by the prime mover to deliver hydraulic fluid, a first hydraulic actuator to be driven by fluid delivered by the first hydraulic pump, a variable displacement second hydraulic pump to be driven by the prime mover to deliver hydraulic fluid, a second hydraulic actuator to be driven by fluid delivered by the second hydraulic pump, and first and second restrictors configured or programmed to restrict an output of the respective first and second hydraulic pumps based on a load on the prime mover. The first restrictor is configured or programmed to change an output restriction of the first hydraulic pump based on priority information about the first and second hydraulic actuators and / or the second restrictor is configured or programmed to change an output restriction of the second hydraulic pump based on the priority information.

In a hydraulic drive system used for an electrically driven hydraulic work machine that drives a hydraulic pump by an electric motor and supplies a hydraulic fluid to plural actuators to carry out work, the power consumption of the hydraulic pump is kept from exceeding a value decided in advance. For this purpose, a controller calculates target power to be consumed by the hydraulic pump on the basis of the capacity of the hydraulic pump, the delivery pressure of the hydraulic pump sensed by a pressure sensor, and a target revolution speed of the electric motor, and limits the target revolution speed of the electric motor in such a manner that the target power falls within a range of the maximum allowable power.

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 discloses integrated electronic brake system PCBA program burning and detecting equipment which comprises a whole machine frame and a burning and testing mechanism, and a burning and testing machine base and a burning and testing upper tool are arranged on the lower portion in the frame of the burning and testing mechanism. A clamping block is slidably arranged at the upper end opening of a butt joint through hole in the burning test upper tool, a hydraulic fluid channel is annularly distributed, and the upper end opening is in linkage with the clamping block through a sleeve spring piston. A reciprocating lead screw in a lead screw box on the rear side is connected with a plate unloading motor and a grabbing clamp through a driving seat, path sliding blocks on the two sides of the grabbing clamp are matched with a downward pressing sliding way on the surface of an upper tool to achieve lifting, the lower portion of the lead screw box is communicated with a liquid pipe through a spring piston, and a toothed plate in a burning frame is meshed with a driving gear; pCBA automatic feeding, discharging, overturning and discharging are achieved through linkage of a grabbing clamp and a transmission mechanism, and the productivity is improved through synchronous operation of a front station and a rear station; the clamping blocks are hydraulically driven to form annular flexible support for the test probe, the posture of the probe is self-adaptively corrected through the arc-shaped clamping blocks, and probe inclination caused by PCBA positioning deviation is avoided.

A hydraulic system for a hydrogen fueled gas turbine engine. The hydraulic system comprises a closed-loop hydraulic fluid conduit (232), a hydrogen-hydraulic fluid heat exchanger (230) configured to exchange heat between cryogenic hydrogen fuel and hydraulic fluid within the hydraulic fluid conduit (232), and a second fuel-hydraulic heat exchanger (518) configured to exchange heat between a second, non-hydrogen fuel and hydraulic fluid in the hydraulic fluid conduit (232).

A sheet material handling equipment includes a handling fixture having a frame adapted for attachment to a robot or manipulator; at least two arms anchored to the frame, each arm being formed by at least two semi-arms pivotally connected to each other and including a gripping member at its free end, the pivotal connection including a rotatable joint with a joint coupling having a joint brake, which are passive with a pressure or electric lock; and a first control line for distributing electrical power, and / or air, and / or hydraulic fluid for controlling the joint and / or the gripping member connected via an adapter to (a) an electrical power supply, and / or hydraulic fluid, and / or air to the robot or manipulator and to (b) a work line control unit, and an adjusting fixture structured to actively adjust a position of at least one of the arms and / or to unlock the joint brake.

A working machine includes: at least one support member connectable to a work attachment to do work by making contact with an object to be contacted; at least one hydraulic cylinder to move the work attachment connected to the at least one support member, a rod-side pressure detector to detect a rod-side hydraulic pressure of hydraulic fluid in communication with a rod-side fluid chamber of the at least one hydraulic cylinder; a bottom-side pressure detector to detect a bottom-side hydraulic pressure of hydraulic fluid in communication with a bottom-side fluid chamber of the at least one hydraulic cylinder; and a controller to calculate a relationship in pressure between the rod-side hydraulic pressure and the bottom-side hydraulic pressure and evaluate, based on the calculated relationship in pressure, a contact state which is a state of contact of the work attachment with the object.

A shock absorber used with an integrated roll control system is provided. Embodiments include a first shock absorber having a first main piston and a first rebound chamber. Embodiments include a second shock absorber having a second main piston; and a second rebound chamber. Embodiments further include a roll control circuit, wherein the first shock absorber and the second shock absorber are coupled to the roll control circuit in a cross-linked configuration. Compression of the first main piston of the first shock absorber pushes a volume of hydraulic fluid into the roll control circuit and increasing pressure in the roll control circuit. Rebound movement of the second main piston is damped in response to the increased pressure provided by the hydraulic fluid entering the roll circuit and coupled to the second rebound chamber.

An electro-hydraulic tubing punch is provided, comprising a controller, an electronic section, a hydraulic chamber, a punch head, and an oriented centralizer. The controller transmits signals to the electronic section, which activates a motor-driven pump in the hydraulic chamber, communicating hydraulic fluid to the punch head. The punch head includes a retractable piercing punch with a tip, neck, body, and stem, where the neck is shaped as a truncated hyperboloid and the stem includes an internal channel. Hydraulic fluid displaces a punch piston within a fluid cavity, causing the piercing punch to extend through an engagement panel. The oriented centralizer includes hinged arms and collars for positioning. The electro-hydraulic tubing punch transitions between retracted and extended configurations via user input received by a punch actuator.

A working vehicle includes an electric storage device; a traction motor configured to propel the working vehicle and to generate electrical energy when braking; a hydraulic system including a hydraulic pump driven by a load motor, a hydraulic actuator and a control valve; and a control system. The control system is configured to determine a state of charge of the electric storage device; induce additional load on the hydraulic system by directing the load motor to drive the hydraulic pump and actuating the control valve to direct flow of hydraulic fluid to the hydraulic actuator when the state of charge is at or above a predetermined threshold.

Heat exchangers for cryogenic fuel distribution systems and related methods are disclosed herein. An example aircraft disclosed herein includes a cryogenic fuel system including a cryogenic fuel, a hydraulic system including a hydraulic fluid, a gas turbine engine fluidly coupled to the cryogenic fuel system, and a heat exchanger fluidly coupled to the cryogenic fuel system, the heat exchanger to exchange heat between the cryogenic fuel and at least one of (1) the hydraulic fluid or (2) a working fluid thermally coupled to the hydraulic system.

An agricultural crop conditioner comprising: a frame; first and second conditioner rolls with the second conditioner roll being movable towards and away from the first conditioner roll to change a size of a gap between the rolls; a tensioner configured to generate closing force component to bias the second conditioner roll in the closing direction; a conditioner roll drive circuit; and a hydraulic actuator. The conditioner roll drive circuit has a hydraulic pump and motor to drive at least one of the conditioner rolls. The hydraulic actuator is configured to convert pressure from hydraulic fluid in the reverse supply line into an opening force to bias the second conditioner roll away from the first conditioner roll. The opening force is less than the closing force when the pump is operated in a forward direction, and greater than the closing force when the pump is operated in a reverse direction.

The underlying invention relates particularly to a hydraulic forming machine, more particularly a forging hammer, for workpiece forming, comprising a hydraulic cylinder for driving a ram configured for workpiece forming, and a hydraulic circuit configured for operation of the hydraulic cylinder, wherein the hydraulic circuit has an actuator with an adjustably variable volume flow via which a first hydraulic working chamber of the hydraulic cylinder, used to accelerate the ram during the execution of a working stroke (A) for workpiece forming, can be provided with hydraulic fluid. The hydraulic circuit is configured to adjust and vary the volume flow of the valve or actuator, depending on a setpoint speed (Vsoll) of the ram to be achieved in an acceleration phase of a working stroke (A), and to optimize the subsequent movement phase.

A hydraulic system of a windrower includes a hydraulic pressure source of a higher pressure hydraulic fluid and a hydraulic pressure return for receiving lower pressure hydraulic fluid. A parking brake is configured to be released by application of the higher pressure hydraulic fluid. A hydraulic fluid supply line is communicated with the parking brake. An electrically operated hydraulic fluid supply valve communicates the supply line with the hydraulic pressure source or with the hydraulic pressure return. An electrically operated selectable check valve is disposed in the supply line between the supply valve and the parking brake, the check valve being shiftable between a checking position permitting hydraulic fluid flow from the supply valve to the parking brake and preventing hydraulic fluid flow from the parking brake to the supply valve, and an open position communicating the supply valve with the parking brake.

A reciprocating assembly includes a bore that contains hydraulic fluid. A piston is received within the bore and can move within the bore in a reciprocating motion between an extended position and a retracted position. Displacement of the piston within the bore causes displacement of hydraulic fluid when hydraulic fluid is in the bore. The piston includes an internal cavity extending at least partially along a length of the piston. The reciprocating assembly also includes a push pin that is received within the internal cavity. The bore, piston, and push pin are arranged so that movement of the push pin related to the bore causes translation of the piston within the bore to the extended position along a translation axis. The push pin can pivot during movement of the push pin between an in-line position and an angled position. The in-line position is substantially parallel to the translation axis.

A vibration damper for a vehicle comprises a damper tube filled with hydraulic fluid, a working piston which is connected to a piston rod and arranged within the damper tube so as to be movable back and forth, wherein the interior of the damper tube is divided by the working piston into a first working chamber and a second working chamber, a closure assembly which fluid-tightly closes off the damper tube at the piston rod side, a rebound stop arrangement having a rebound stop piston, which is mounted on the piston rod, and a rebound stop sleeve for receiving the rebound stop piston in the rebound stage, wherein the rebound stop piston separates off a rebound stage working chamber within the rebound stop sleeve, and wherein the rebound stop piston has a bypass channel for fluidically connecting the piston-rod-side working chamber to the rebound stage working chamber, wherein a valve device is arranged in the rebound stop piston hydraulically in parallel to the bypass channel.

A material calculator for a truck to deliver a predetermined quantity of brine per mile driven by the truck for a known route of miles independent of and proportional to truck speed, wherein the truck carries a known number of gallons of brine and a known number of pounds of salt. The material calculator has a processor accepting entry values of route miles to be driven, number of times the route of miles is to be driven, number of gallons of brine carried by the truck, and the number of pounds of salt carried by the truck. The processor has software for calculating dispensing of the brine and salt so that each is exhausted when the route is completed. A hydraulic pump pumps hydraulic fluid to a variable flow positive displacement pump to implement the calculated number of gallons of brine per mile to be dispensed for the known route.

The invention relates to a quick changer (1) for changing an attachment on a construction machine, comprising: a carrier (2), which has a first receptacle (4) for a first coupling element on one side thereof and a second receptacle (5) for a second coupling element on the other side thereof; and a drive device (12) movably arranged at the support (2) in order to move the at least one locking element (13) associated with the first receptacle (4) between an extended locking position and a retracted release or replacement position, a plurality of hydraulic quick couplings being arranged at the drive device (12) in order to supply the additional device with hydraulic fluid. According to the invention, only three hydraulic quick couplings (19A, 19B, 19C) arranged next to one another are arranged on the drive device (12), of which two outer hydraulic quick couplings (19A, 19B) lie in the same plane and in contrast, the inner hydraulic quick coupling (19C) lying therebetween is offset in height upwards.

A system for braking a work vehicle includes a brake assembly comprising a primary braking cylinder and a spring-applied, hydraulic-release (SAHR) braking cylinder operatively coupled to the primary braking cylinder. The primary braking cylinder includes a braking piston configured to actuate a brake element to engage and disengage the brake assembly. The system also includes a manual brake input device configured to actuate the braking piston when the work vehicle is operated in a manual mode, and a control valve configured to regulate a supply of pressurized hydraulic fluid to the SAHR braking cylinder. In addition, the system includes a computing system configured to control an operation of the control valve to regulate the supply of pressurized hydraulic fluid to the SAHR braking cylinder such that the SAHR braking cylinder actuates the braking piston when the work

A drilling tool (200, 300) for use in a well is provided, and which is being adapted to connect to a downhole hydraulic fluid supply (137). The drilling tool (200, 300) comprises at least one anchoring member (207, 309) having an inner face contactable by hydraulic fluid from said downhole hydraulic fluid supply (137) and being moveable radially, by means of pressurised hydraulic fluid from said downhole hydraulic fluid supply (137) acting upon said inner face, with respect to the longitudinal axis of the drilling tool (200, 300), between:—a retracted position in which the at least one anchoring member (207, 309) is spaced apart from an inner surface of the well; and an extended position in which the anchoring member (207, 309) contacts an inner surface of the well. A drilling member (315) having a longitudinal axis, and having an inner face contactable by hydraulic fluid from said downhole hydraulic fluid supply (137), is rotatable in use about said longitudinal axis, wherein the drilling member (315) is arranged within the drilling tool (200, 300) such that the longitudinal axis of said drilling member (315) is substantially perpendicular to said longitudinal axis of said drilling tool (200, 300). The drilling member (315) is also moveable radially by means of pressurised hydraulic fluid from said downhole hydraulic fluid supply (137) acting upon said inner face thereof. The drilling member (315) is also moveable radially, by means of pressurised downhole hydraulic fluid from said downhole hydraulic fluid supply (137) acting upon said inner face, with respect to the longitudinal axis of the drilling tool (200, 300) between:-a retracted position in which the drilling member (315) is spaced apart from an inner surface of the well; and an extended position in which the drilling member (315) contacts an inner surface of the well. The inner face of the anchoring member (207, 309) is in fluid communication via said hydraulic fluid with the inner face of the drilling member (315) such that both respective inner faces experience the same pressure of the said hydraulic fluid acting upon them. A method for drilling through a sidewall in a tubular in a well is also provided.

A grapple hydraulic cylinder may comprise a barrel body, a piston-rod assembly, a cap operably connected to the barrel body, and a pressure relief system. The pressure relief system may be operably connected to a rod side chamber and a cap side chamber. The pressure relief system may comprise a first valve and a second valve. The second valve may be a relief valve configured to open upon the cap side chamber reaching a determined pressure and moving hydraulic fluid from the cap side chamber to the rod side chamber while the first valve simultaneously maintains the locked position. Pressure in the cap side chamber is reduced, and pressure in the rod side chamber increases. A similar configuration may be utilized to move hydraulic fluid from the rod side chamber to the cap side chamber to reduce pressure in the rod side chamber.

A construction machine is capable of returning the posture of an earth removal plate (blade) from a rocking posture to a predetermined normal posture. A stay is mounted on the construction machine body to move in upward and downward directions. The earth removal plate is mounted on the distal end portion of the stay, and is rockably movable in forward and rearward directions by an angle cylinder controlled by a flow of hydraulic fluid in response to receiving an instruction about rocking the earth removal plate. A normalization switch gives an instruction to set the posture of the earth removal plate to a predetermined normal posture from the rocking posture. The posture of the earth removal plate is set to the predetermined normal posture from the rocking posture in response to the instruction from the normalization switch.

An aircraft system is disclosed including a hydraulic actuator, an inlet line for supplying hydraulic fluid to the hydraulic actuator, an outlet line for removing hydraulic fluid from the hydraulic actuator, a first one-way valve configured to allow fluid flow along the inlet line in a direction toward the hydraulic actuator, and a second one-way valve configured to allow fluid flow along the outlet line in a direction away from the hydraulic actuator.

A power tool includes a housing, a motor positioned within the housing, an impulse assembly coupled to the motor to receive torque therefrom, the impulse assembly including a chamber containing a hydraulic fluid, an anvil positioned at least partially within the chamber, and a hammer configured to reciprocate within the chamber. The hammer is configured to displace the hydraulic fluid during reciprocation of the hammer such that the hydraulic fluid flows in the first direction when the hammer moves away from the anvil, and the hydraulic fluid flows in the second direction when the hammer moves toward the anvil. Flow resistance on the hydraulic fluid is different in the first direction and the second direction.

A check valve is arranged in a flow path through which hydraulic fluid flows. The check valve includes: a cap fixed in the flow path; a plug seated on a seat surface provided in the flow path; a first extension provided in the cap and extending from the cap toward the plug; a second extension provided in the plug, extending from the plug toward the cap, and guided by the first extension; and a spring interposed between the cap and the plug to bias the plug toward the seat surface. The check valve further includes a retainer attached to the cap, extending from the cap toward the plug, and locked to the second extension.

A fluid pump includes a motor disposed within an outer housing. The motor includes a stator and a rotor in electromagnetic communication with the stator. Windings are disposed on the stator that receive an electric current for defining the electromagnetic communication. A pump element is attached to the rotor via a drive shaft. The pump element operates with the rotor to deliver a fluid through a hydraulic fluid path. A plurality of sensors measure information related to at least one of the stator, the windings, the rotor, the pump element, the fluid and the hydraulic fluid path. A controller is in communication with the windings for delivering the electric current to the windings. The controller is also in communication with the plurality of sensors for measuring and recording the information and communicating this information to one of an external memory and an external controller.

A system and method delivering hydraulic liquid at different predetermined and controllable pressures for a hydraulic tool or machine is disclosed. The system comprises an electric motor (100) comprising a rotor (110) and a stator (120); a pump (200), the pump being a plunger-type pump and comprising a cam (210), a cam shaft (220), a plunger (230), a plunger chamber (240), and a valve (250), the valve (250) opening or closing an inlet (260) for the hydraulic liquid to the plunger chamber (240), the plunger chamber (240) comprising an outlet (270) for the hydraulic liquid, the plunger (230) engaging the cam (210), and the cam shaft (220) being connected to the rotor (110); a pressure sensor (290) sensing pressure of the hydraulic liquid to be delivered; and a controller (300) configured to control the opening and closing of the valve (250) in relation to pressure sensed by the pressure sensor (300) and rotational position of the rotor (110) or cam (210), the controller (300) thereby controlling the volume and pressure of the hydraulic liquid to the outlet (270) and the load on the electric motor (100).