Gas turbine bucket dovetail design for turbine rotors

摘要

A turbine bucket dovetail (12) secures buckets in a turbine rotor. The turbine bucket dovetail includes a plurality of hooks (26) engageable with a wheel post (16) of the turbine rotor, which hooks extend in an axial direction relative to the turbine rotor. A pocket is machined in a tangential face of the dovetail, resulting in reduced peak stress in the wheel post dovetail edge at the gate opening (14).