ELECTROMAGNETIC SAFETY SCREW-AND-NUT DEVICE

摘要

The device consists in combination of a stator arranged around a cylindrical leakproof nonmagnetic chamber (3) and, in its upper part and inside the chamber (3), of a rotor (5) free in axial translation along its shaft (6) which it drives in rotation but which is stationary in translation, imparting a rotational movement to a hollow threaded rod (8) whose movement imparts a translational movement to a nut (9) sliding vertically inside the chamber. The rotor (5) additionally controls the opening or the closing of a jaw releasing or holding the hollow threaded rod (8). Application to the vertical movement of the control rods of a nuclear reactor, with a safety device.