Snecma

Laurent Raberin

Claude Marcel Mons

Stephane Rousselin

Jean-Marc Rongvaux

Regis Eugene Henri Servant

Stéphane Rousselin

A guide shaft bearing including an internal ring mounted on a cylindrical contact surface of a shaft and a device for the axial locking of the ring including a ring mounted sliding on the cylindrical contact surface and an annular rib made of shape memory material mounted in two annular grooves of the cylindrical contact surface and of the ring is disclosed. The annular rib is able to expand radially by shape memory effect when it is subjected to a temperature greater than a transition temperature of its material to pass to a locking position of the ring on the cylindrical contact surface.

Device for the axial locking of a guide shaft bearing in a turbomachine

A device for centering a tube inside a hollow shaft is disclosed. The device includes a deformable device interposed between the tube and the hollow shaft and including bearing members for bearing against the inside surface of the shaft and suitable for being spaced away from the inside surface of the shaft in order to enable them to be moved inside the shaft. The deformable device is made of a shape-memory material suitable for deforming to press the bearing members against the inside surface of the shaft or to space them away therefrom on being subjected to a predetermined temperature.

Centering a part inside a shaft

A support for a bearing that guides a shaft in a turbomachine is disclosed. The support includes an annular part made of a shape memory material which retains an initial shape when the load applied to it remains below a threshold value and which deforms, absorbing energy when the applied load becomes at least equal to the threshold value. The annular part is capable of reverting at least approximately to its initial shape when the applied load drops back below the threshold value.

Growing community of inventors

Paris, France

Laurent Raberin