Patent ID: 8246255
Filing Date: 2012-08-21
Classification: F01D,F02C,F05D,F16C,Y10T

Abstract:
1. A guide shaft bearing in a turbomachine, comprising: an internal ring adapted to be mounted on a cylindrical contact surface of a shaft; and an axial locking ring which locks the internal ring, wherein the locking ring is mounted sliding on the cylindrical contact surface, wherein an annular rib made of shape memory material is mounted in an annular area delimited by two annular grooves facing each other and formed in the cylindrical contact surface and in an internal surface of the locking ring, the annular rib being able to expand radially by shape memory effect when the annular rib is subjected to a temperature greater than a transition temperature of its material to pass from a position wherein the annular rib is contained in the groove of the cylindrical contact surface to a locking position of the locking ring on the cylindrical contact surface, and wherein a width of the groove of the locking ring is greater than that of the groove of the cylindrical contact surface.