Turbomachine rotor having dovetail slot and method of machining

摘要

Various embodiments include a rotor having a dovetail slot with a bulbous fillet region, and in some cases, recessed inclined bearing surfaces. Various embodiments include methods of forming such a slot in a turbomachine rotor.

主权项

1. A method of refurbishing a turbomachine rotor comprising:
providing a rotor body having
at least one dovetail slot within the rotor body, the at least one dovetail slot for receiving a dovetail section of a rotor blade, the at least one dovetail slot including:a pair of opposing, vertically aligned surfaces defining a radial opening;a pair of inclined bearing surfaces each continuous with one of the pair of opposing vertically aligned surfaces;a substantially planar inner surface opposing the radial opening; and machining a pair of rounded junctions to form a pair of bulbous surfaces each continuous with an end of the substantially planar inner surface and an end of one of the pair of inclined bearing surfaces, the pair of bulbous surfaces each having:
a first section proximate the one of the pair of inclined bearing surfaces; anda second section continuous with the first section; and machining the pair of inclined bearing surfaces to form recessed inclined bearing surfaces after the machining of the pair of rounded junctions to form the pair of bulbous surfaces to form a refurbished dovetail slot.