Continuing the fifth section of electromagnetic clutch, electromechanical actuator and turbine, the motor and coil are controlled by the controller, which includes the nominal valve inlet and the actual valve inlet. To determine the actual position of the valve piston, a position sensor is installed on the valve piston, for example, between the rocker arm and the valve. When the valve spring applies a spring force to the valve piston to keep the valve in the closed position, the actuator no longer applies momentum or force to the valve piston to close the valve. Therefore, in the embodiment shown in FIG. 3, the motor and the coil are in a non-running state. Since the thin plate element is pre-pressed, even if there is no electromagnetic force on the insertion portion, the insertion portions are still engaged when the rotor does not rotate. In the corresponding groove.
The valve shown in the layout diagram of the valve-good electromechanical actuator of FIG. 4 is in the open position. In this case, both the motor and the coil are running, so the crank disk is turned to a position that causes the push rod to move axially. By converting the axial movement of the push rod through the rocker arm to the axial movement of the valve piston, the valve The piston is detached from the valve seat, so that the fluid between the valve inlet and the valve outlet can be communicated, so that the primary steam flows into the steam turbine. Using a multi-stage transmission, the rotor is connected to the cylindrical element, and the torque generated by the motor is converted into force. The force acts on the valve piston to overcome the spring force exerted by the valve spring on the valve piston.
If the valve is emergency closed, the motor and coil are no longer running. Once the motor is running, the spring force exerted by the valve spring on the valve piston will immediately start the movement of the valve piston in the closed position. This movement of the valve piston will be converted into a rotary movement of the cylindrical element of the electromagnetic clutch. Because the coil is not running and the cylindrical element is rotated, the insertion part of the thin plate element is forced out of the groove, so that the cylindrical element can be rotated. When the cylindrical element is at least partially immersed in the oil reservoir, the cylinder The rotational movement of the shaped element creates a damping which ensures that the valve piston does not hit or damage the valve seat. Therefore, due to the damping of the cylindrical element, the valve seat can be protected from injury if the valve piston is closed in an emergency.