DEVICE FOR CENTRING A TUBE IN A TURBINE SHAFT

摘要

The invention concerns a device for centring a tube (3) or a component inside a turbine hollow shaft (2) in a gas turbine, said tube (3) or said component being secured in rotation with said shaft (2) at its ends, said device comprising a sheath (9) integral with said tube (3) and enclosing it, an elastic ring (20) interposed between the sheath (9) and the shaft (2) and having a pair of diametrically opposed shoes extending radially outwards, and means for expanding the ring (20) after the device is assembled so that said shoes are pressed against the inner wall of the shaft. The invention is characterised in that the shoes consist of thin cylindrical and elastic walls (25) having unstressed an external diameter slightly different from the internal diameter of the hollow shaft (2) and matching the inner wall (21) of the shaft (2) when assembled.