Patent ID: 8967973
Filing Date: 2015-03-03
Classification: F01D,F05D,Y10T

Abstract:
1. A turbine bucket comprising: a radially inner mounting portion; a shank radially outward of said mounting portion; at least one radially outer airfoil having a leading edge and a trailing edge; a substantially planar platform radially between said shank and said at least one radially outer airfoil; at least one axially-extending angel wing seal flange on a leading end of said shank thus forming a circumferentially extending trench cavity along said leading end of said shank, radially between an underside of said platform leading edge and a radially outer side of said angel wing seal flange; and slash faces along opposite, circumferentially-spaced side edges of said platform, at least one of said slash faces having a dog-leg shape, a leading end of said at least one of slash face terminating at a location circumferentially offset from said leading edge of said at least one radially outer airfoil; wherein: the slash face terminates at a first location on a leading edge of the platform and the leading edge of the platform includes an axially extending region and an axially recessed region, and the first location is at the axially recessed region; the axially recessed region comprises a half of the platform leading edge, the first half of the platform being a half of the leading edge in a direction of rotation of the airfoil; the axially extending region comprises a second half of the platform leading edge; and the slash face intersects the leading edge within the axially recessed region at an angle such that the slash face projects in the direction of rotation of the airfoil.