Patent ID: 6890150
Filing Date: 2005-05-10
Classification: F01D,F05B,F05D

Abstract:
1. A turbine bucket comprising: an airfoil having a tip shroud, a shank and an entry dovetail; a tip shroud seal projecting radially outwardly from said tip shroud and extending continuously between end edges of the tip shroud in a direction of rotation of said airfoil about a turbine axis; a cutter tooth carried by said tip shroud seal for enlarging a groove in an opposing fixed shroud, said cutter tooth having a center point located with reference to X, Y and Z axes, where the X-axis extends axially in an exhaust flow direction; the Y-axis extends in a direction of rotation of the turbine bucket; and the Z-axis extends radially through the intersection of the X and Y axes; wherein said center point is located about ½ inch along the Y-axis from the X=0 position, and wherein said Z-axis is located 0.517 inches from an outside edge of a seal pin extending along said entry dovetail, as measured in a direction normal to the shank of the bucket, and 1.866 inches from a forward edge of a forward tang on said turbine bucket entry dovetail, as measured along said X-axis.