Westinghouse Electric Corporation

Thomas P Sherlock

Forrest E Coyle

Jacques E Albaric

George T Campbell, Jr

A hollow, rotatable shaft bore heater assembly for heating a shaft from its inside to its outside. Rapid rotatable shaft heating is provided by a plurality of electrical heaters situated in slots formed on the inner surfaces of a plurality of foundation members which are insertable in the hollow shaft and are biased thereagainst by biasing structure. When assembled, the foundation members constitute a substantially cylindrical structure which has the slots formed on its inner surface and the electrical heaters are restrained within those axially extending and circumferentially separated slots by insulation disposed on the inner surface of the foundation members across the slots open mouths. The biasing structure provides biasing force between circumferentially adjacent foundation members so as to maintain contact between the shaft and foundation members during non-rotation of the shaft.

Hollow shaft bore heater assembly

A rotor disc for a rotor shaft member of an axial flow turbine apparatus is disclosed. The disc has disposed externally thereon a flat surface which lies parallel to a predetermined longitudinal plane extending within the disc. The plane is disposed within the disc so as to extend through a keyway utilized to prevent rotation of the disc relative to the shaft. The predetermined longitudinal plane within the disc is the plane in which cracking of the disc is most likely to occur. The externally disposed, flat, surface area of the disc permits an ultrasonic signal emitted from a transducer disposed adjacent to the external surface to propagate in a direction substantially perpendicular to the predetermined plane within the disc.

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Lansdowne, PA, United States of America

Thomas P Sherlock