Abstract: An electromagnetical radial lamella clutch is for an electromechanical actuator, in particular for a valve. The clutch includes a rotor element having an axis of rotation and a circumferential outer surface area with at least one recess. The rotor element is surrounded by a cylindrical element, whereby at least one lamella element is fastened to the cylindrical element. The lamella element includes an insertion portion being placed in the recess, whereby an electrical coil holds the lamella element in the recess. An electromechanical actuator may further include the electromagnetical radial lamella clutch. Further, a turbine including a valve, may be operated by the electromechanical actuator.

Abstract: An actuator includes a valve spindle, for adjustment of an opening position for a valve and a drive piece for the valve spindle. The drive piece is connected to the valve spindle, by a storage device, which may be pre-tensioned to a particular pre-tensioned value during a pre-tension process, in such a manner that, with a pre-tensioned storage device the opening position can be set without altering the value of the pre-tensioning. The actuator is particularly suitable for a valve on a steam turbine or a gas turbine. As an example, the actuator may be a hydraulic damping unit, integrated in a damping piston. The damping unit permits a reliable end-travel damping for the valve, in particular in the case of rapid closure.

Abstract: The invention relates to a method for regulating a steam turbine (1), according to which steam is fed to the steam turbine (1) via at least three valves, whereby one of the valves is regulated as a regulating valve (9, 11), and at least two valves are controlled as control valves (13, 15).

Abstract: The invention pertains to an electromagnetical radial lamella clutch (10) for an electromechanical actuator (30), in particular for a valve (50). The clutch (10) comprises a rotor element (11) having an axis (12) of rotation and a circumferential outer surface area (13) with at least one recess (17). The rotor element (11) is surrounded by a cylindrical element (14), whereby at least one lamella element (15) is fastened to said cylindrical element (14). The lamella element (15) has an insertion portion (16) for being placed in said recess (17), whereby an electrical coil (21) holds said lamella element (15) in said recess (17). The invention further relates to an electromechanical actuator (30) and to a turbine having a valve (50) operated by said electromechanical actuator (30).

Abstract: An actuator includes a valve spindle, for adjustment of an opening position for a valve and a drive piece for the valve spindle. The drive piece is connected to the valve spindle, by a storage device, which may be pre-tensioned to a particular pre-tensioned value during a pretension process, in such a manner that, with a pre-tensioned storage device the opening position can be set without altering the value of the pre-tensioning. The actuator is particularly suitable for a valve on a steam turbine or a gas turbine. As an example, the actuator may be a hydraulic damping unit, integrated in a damping piston. The damping unit permits a reliable end-travel damping for the valve, in particular in the case of rapid closure.

Abstract: The invention relates to an electromechanical actuating drive for a valve, in particular of a steam turbine. It has a push rod for setting an opening position of the valve and also an electric motor for driving the push rod. The push rod is connected to the electric motor via a transmission device which generates a changing torque, depending on the axial displacement of the push rod. The invention relates, furthermore, to a steam turbine.

Abstract: For checking the operating reliability of a turbine during load shedding, input values having simulated time profiles are fed to a regulating circuit regulating a turbine. The reaction of the regulating circuit to the input values simulating load shedding conditions is subsequently measured. Changes in the regulating circuit are then detected by comparison with an earlier measurement.