APPARATUS FOR MOUNTING A BLADE ON A TURBINE DISK

摘要

A turbine wheel or disk having a plurality of dovetail slots formed in its circumference for receiving a dovetail root of a blade such as a compressor or turbine blade. Each of the dovetail slots has a load face positioned to oppose a centrifugal load exerted by the dovetail root when a turbine is in operation. Each of the dovetail slots has a pair of opposing acute bottom corners formed between a radially inner edge of the load face and a bottom of the dovetail slot. Each of the acute bottom corners may have an undercut formed that includes a first radius of curvature and a second radius of curvature to form a clearance between the dovetail root and the dovetail slot. Each of the dovetail slots may have a curved bottom for receiving a rounded dovetail root.

主权项

1. A turbine disk comprising:
a dovetail slot formed in a circumference of the turbine disk for receiving a dovetail root of a blade; a load face in the dovetail slot, the load face positioned to oppose a centrifugal load exerted by the dovetail root; an acute bottom corner formed in the dovetail slot between a radially inner edge of the load face and a bottom of the dovetail slot; and an undercut formed in the acute bottom corner that widens a portion of the dovetail slot beyond a width of the dovetail root.