DEVICE FOR DETECTING THE AXIAL POSITION OF A ROTOR SHAFT AND ITS APPLICATION TO A ROTARY MACHINE

摘要

Device for detecting the axial position of a rotor shaft (16) of arotary machine having a stator and a rotor.The detecting device comprises a sensor stator ring (31), securedto the stator, made from ferromagnetic material, facing the shoulder ofone end (16b) of the hollow or not hollow rotor shaft (16) and arrangedso as to leave an axial airgap (e0+x) with said one end (16b) of the rotorshaft (16), said sensor stator ring (31) comprising at least one annularslot (32, 33) receiving an annular induction coil (34, 35). The rotor shaft(16) is made from solid magnetic steel, an outer end (16b) of the rotorshaft (16) acts as a target surface whose axial position is to be measuredby the sensor stator ring (31).