BUCKET AND WHEEL DOVETAIL DESIGN FOR TURBINE ROTORS

摘要

rotor wheel 12 and the bucket 16 between the dovetail joints on the number of rotor dovetail configuration includes the element 14 and the arm on the bucket dovetail component 18 . Can dovetail axial protrusion having a hook component along the inclined surface generally radially inwardly directed surface (28 , 30, 32, 34 ) and a . Inclined surface is perpendicular to the axis of rotation and forms an included angle with the plane that bisects the wheel dovetail , wherein the angle is greater than 90 , is constant for all the hooks . In addition, the single radius fillet (26) is provided along the transition surface between the inclined surface and the pressure surface of the neck (24) . Therefore, the stress concentration is minimized .