Method and device for extracting blades packs of steam turbine vanes.

摘要

Method for extracting blade packs (1) radially insertable into a disc (5) of the rotor of a steam turbine in order to be fixed thereto. The flats located above the foot of the blades is gripped and pulled radially. Apparatus for applying the method comprising two articulated levers (15), of which the rear arms (18) are moved away so that the front arms (17) provided with jaws (20) grip around the flats of the blades. Thrust cylinders (23) move the apparatus (14) radially away from the disc (5). The blade packs (1) are extracted without damaging them and may be reused after repair of the disc (5). ……