Patent ID: 9708916
Date: 2017-07-18
CPC Classifications: F01D,F05D,Y02T

Claim:
1. A method to machine a casted turbine bucket having an airfoil portion, a platform portion, and a dovetail, the dovetail has a fir tree shape that is formed to connect to a turbine wheel that rotates around a rotational axis, and the dovetail is aligned to a line extending normal to the rotational axis, the method comprising: machining an internal plenum into the turbine bucket, wherein the internal plenum includes a plenum chamber in the platform portion, a plenum passage extending through the dovetail along the line from a plenum inlet to the plenum chamber; wherein the plenum inlet is aligned to the line and provided at the dovetail, the plenum is aligned to the line and provided at a central location of the platform portion, and the line extends through the plenum inlet, the plenum chamber, and the airfoil portion.