Patent ID: 9366142
Filing Date: 2016-06-14
CPC Classification: F01D,F05D,Y10T

Claim Text:
1. A turbine rotor disk comprising: a row of buckets secured about a radially outer periphery of the rotor disk, each bucket having an airfoil, a platform, a shank and a mounting portion, the mounting portion received in a radial slot formed in the rotor disk such that adjacent buckets in adjacent radial slots are separated by a rotor disk post located between adjacent mounting portions and by a shank cavity formed between adjacent shanks, radially outward of said rotor disk post and radially inward of adjacent platforms, the adjacent buckets form a platform gap between said adjacent platforms; and at least one discrete thermal plug substantially filling said shank cavity, such that said thermal plug directs a cooling flow along an outer perimeter of said shank cavity; wherein said thermal plug is shaped to form a single flow channel in the shape of a recess that extends an entire axial length along a radially outer edge of said thermal plug that is directly radially inwards of said adjacent platforms, said flow channel extends a substantial circumferential length across the platform gap and directs cooling flow along an underside of said adjacent platforms, and said thermal plug includes at least one annular protrusion located on said radially outer edge of said thermal plug to define at least one edge of said flow channel, such that said thermal plug does not abut said platform gap.