HAWE Hydraulik SE

A method for determining the position of an armature of an electromagnet, a method for determining the position of a valve member of an electromagnetically actuated fluid valve, and a fluid system comprising an electromagnetically actuated fluid valve and an electronic control unit executing the method for determining the position of a valve member are provided. The electronic control unit applies a current profile in the coil of a non-actuated electromagnet that is substantially below a minimum actuation current of the electromagnet. By applying the current profile, the electronic control unit determines a characteristic profile of the electromagnet. A position characteristic of the electromagnet is calculated based on the position characteristic.

A hydraulic trim device is provided for a boat motor. The trim device includes a trimming cylinder, a piston rod received in a receptacle of the trimming cylinder and shaped to be movable within the trimming cylinder with respect to a central axis between first and second end positions. The piston rod includes a distal contact portion. A trimming plate of the trim device includes a base surface opposite an asymmetric contact surface that faces the piston rod, first and second side surfaces extending orthogonally from the base surface to first and second base points on the asymmetric contact surface. The asymmetric contact surface abuts the distal contact portion of the piston rod. Movement of the distal contact portion along the asymmetrical contact surface during a movement of the piston rod between the first and second end positions causes movement of the hydraulic trim device.

A method of forming a quadrant control valve system for a hydraulic system is provided. The quadrant control valve system comprises at least one control valve assembly comprising at least one control valve, an electronic valve controller and a control valve sensor system. The method essentially comprises steps of automated quadrant-based load case analysis, automated circuit diagram synthesis and automated controller synthesis as well as implementation of the synthesized circuit diagram and implementation of the synthesized controller.

A hydraulic device for a pitch system of a wind turbine includes an air separation device which includes a fluid collector having an air accumulation portion, at least one fluid inlet and a fluid outlet portion, wherein a fluid emulsion of air and hydraulic fluid can be introduced into the fluid collector through the at least one fluid inlet. The fluid collector is labyrinth-shaped so that rotation of the air separation device about an axis of rotation causes the air in the fluid emulsion to move through the labyrinth-shaped fluid collector in a direction to the air accumulation portion and the hydraulic fluid in the fluid emulsion to move through the labyrinth-shaped fluid collector in a direction to the fluid outlet portion.

A hydraulic system for the pitch angle adjustment of a rotor blade of a wind turbine) includes a variable displacement pump, a hydraulic accumulator, a dynamic valve, a control valve, a tank and a pitch cylinder. The variable displacement pump is connected to the control valve via a first connecting line and the control valve is connected to the tank via a second connecting line and to a piston side of the pitch cylinder via a third connecting line and to a rod side of the pitch cylinder via a fourth connecting line. In a first switching position, the first connecting line is connected to the third connecting line and in a second switching position, the first connecting line is connected to the fourth connecting line and the second connecting line is connected to the third connecting line.

A hydraulic system for a passenger restraint device includes a hydraulic pump, at least one hydraulic section with a hydraulic accumulator, a valve arrangement and a hydraulic cylinder unit with a piston. The valve arrangement is connected to the hydraulic pump, the hydraulic accumulator and the hydraulic cylinder unit and can be controlled by a higher-level control unit. The hydraulic pump is configured to pressurize the hydraulic cylinder unit by switching the valve arrangement to an opening switching position, so that the piston moves to an open position. The hydraulic accumulator is configured to pressurize the hydraulic cylinder unit by switching the valve arrangement to a closing switching position so that the piston moves to a close position. The higher-level control is connected to a manually operable sensor system and switches the valve arrangement to the closing switching position when the manually operable sensor system is actuated.

A method of forming a quadrant control valve system for a hydraulic system is provided. The quadrant control valve system comprises at least one control valve assembly comprising at least one control valve, an electronic valve controller and a control valve sensor system. The method essentially comprises steps of automated quadrant-based load case analysis, automated circuit diagram synthesis and automated controller synthesis as well as implementation of the synthesized circuit diagram and implementation of the synthesized controller.

A valve section includes a pressure channel, a load pressure signaling channel, a compound load pressure channel, a spool valve, a pressure compensator, a first and a second hydraulic connection and a first line connecting the pressure channel to the spool valve. The pressure compensator is disposed in the first line. A first pressure signal via a first pilot control line and a third pressure signal are applied to the pressure compensator on the closing side. A second pressure signal via a second pilot control line and a fourth pressure signal are applied to the pressure compensator on the opening side. A fifth pilot control line branches off between the pressure compensator and the spool valve and is connected to the second pilot control line. A first hydraulic resistor is disposed in the fifth pilot control line and a second hydraulic resistor is disposed in the second pilot control line.

A hydraulic system for a brake release device has a pump device, a tank, a valve assembly and at least one working port, where the working port is connectable to the tank or the pump device via the valve assembly. The pump device is switchable between an operating mode and a shutdown mode, where the valve assembly connects the working port to the tank in the shutdown mode and the valve assembly is only hydraulically operable. A brake release device having such a hydraulic system is also disclosed.

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.