Patent ID: 8209834
Filing Date: 2012-07-03
Classification: F01D,F05D,Y02T,Y10T

Abstract:
1. A device for centering a part inside a hollow shaft in a turbomachine, the device comprising: radially deformable means interposed between the part and the hollow shaft and including bearing members for bearing against an inside surface of the shaft, the bearing members being suitable for being spaced away from the inside surface of the shaft to enable them to be moved inside the shaft, wherein the deformable means are made at least in part out of a shape-memory material suitable for radially pressing the bearing members against the inside surface of the shaft, or for radially spacing the bearing members away therefrom when the material is subjected to a predetermined temperature, wherein the part is a tube, and wherein the deformable means comprise rods of shape-memory material, each having a radially inner end fastened to an outside surface of the tube and a radially outer end carrying a bearing shoe for bearing against the inside surface of the shaft, the radially outer end of each rod being suitable for curving radially inwards by deformation of the shape-memory material in order to move the corresponding bearing shoe away from the inside surface of the shaft.