Locking device of a bearing on a shaft in a turbomachine

摘要

The bearing has a circular sectioned annular retaining ring (64) e.g. split ring, made of shape memory material and mounted in an annular space delimited by two annular grooves (56, 60) formed opposite to one another in a cylindrical seating (26) and an internal surface of a ring (34). The retaining ring radially expands memory shape effect when the retaining ring is subjected to temperature above transition temperature of the material to move from a position in which the retaining ring is contained in the annular groove (56) in a locking position of the ring (34) on the seating.