SYSTEM AND METHOD FOR SECURING AXIALLY INSERTED BUCKETS TO A ROTOR ASSEMBLY

摘要

A rotor wheel assembly includes a rotor wheel having a plurality of dovetail slots spaced circumferentially about a peripheral surface of the rotor wheel. The rotor wheel also has a plurality of notches formed in the peripheral surface. The rotor wheel assembly includes at least one bucket having an integral cover, an airfoil, a dovetail, and a platform having a first surface and an opposite second surface. The first surface of the platform includes a keyway. The keyway has an opposing tapered surface oriented at a first angle relative to the first surface of the platform. Furthermore, the rotor wheel assembly includes a wedge key having first face that is oriented substantially parallel to the first surface of the platform and an opposite second face that is oriented at the first angle relative to the first face, such that the second face is substantially parallel to the taper surface.

主权项

1. A rotor wheel assembly comprising:
a rotor wheel comprising a plurality of dovetail slots spaced circumferentially about a peripheral surface of said rotor wheel, and a plurality of notches formed in said peripheral surface; at least one bucket comprising an integral cover, an airfoil, a dovetail, and a platform comprising a first surface and an opposite second surface, said first surface comprising a keyway formed therein, said keyway comprising an opposing tapered surface oriented at a first angle relative to said platform first surface; and a wedge key comprising a first face oriented substantially parallel to said platform first surface and an opposite second face oriented at said first angle relative to said first face, said second face is substantially parallel to said tapered surface.