Patent ID: 9322282
Filing Date: 2016-04-26
CPC Classification: F01D,F05D

Claim Text:
1. A turbine rotor blade comprising: an airfoil having an airfoil tip; a tip shroud; and a fillet about an intersection of said airfoil tip and said tip shroud, said fillet defining a fillet profile variable about said intersection to facilitate improved aerodynamic airflow about said intersection, wherein said fillet defines a nominal profile substantially in accordance with coordinate values of X, Y, Z, offset 1, offset 2 and Rho set forth in Table I wherein X, Y, and Z define in inches discrete apex locations about the intersection of said airfoil tip and said tip shroud, offset 1 and offset 2 are respective distances in inches from each corresponding apex location to a fillet edge point defined between an undersurface of said tip shroud and an airfoil surface, wherein, upon connection about said respective tip shroud and said airfoil, said fillet edges are defined, and Rho is a non-dimensional shape parameter ratio of (D1/(D1+D2)) at each apex location, wherein D1 is a distance defined between a midpoint along a chord extending between said fillet edge points and a shoulder point defined on a surface of said fillet, and D2 is a distance defined between the shoulder point and said apex location, said fillet edge points on said tip shroud and said airfoil at each X, Y, and Z location being connected by a smooth continuing arc extending through said shoulder point in accordance with the shape parameter Rho to define a profile section at each said apex location, wherein said profile sections at each said apex location being joined smoothly with one another to form the nominal fillet profile.