Westinghouse Electric Corporation

Theodore Papageorgiou

Kent Goran Hultgren

Rocco J Covelli

A stationary vane assembly for a turbo-machine in which the vane is restrained against motion in the circumferential direction by first and second locking pins. The second locking pin extends radially through a turbine cylinder and engages a notch in a downstream support rail formed on the vane outer shroud. The first locking pin is affixed to the front radial flange of the cylinder and has a projection that extends into a notch in an upstream support rail formed on the outer shroud. An over-sized slot in the first locking pin allows the circumferential location at which the first locking pin is fixed to the cylinder to be adjusted, thereby ensuring that the first locking pin can be pre-loaded against the outer shroud notch at assembly in a manner that will allow it to restrain the motion of the vane.

Apparatus for restraining motion of a turbo-machine stationary vane

A gas turbine vane airfoil has an aft cavity in which an insert is placed so as to form a cooling air passage between the insert and the walls that form the cavity. The insert serves to distribute cooling air around the passage. Cooling air from the passage exits the vane airfoil via film cooling holes in the pressure surface of the airfoil and via a passage formed in the trailing edge of the airfoil. A W-shaped flexible regulator seal is attached to the trailing edge of the insert and has legs that are pressed against ridges in the airfoil walls. Holes in the regulating seal regulate the amount of cooling air flowing from the passage surrounding the insert to the trailing edge passage, thereby preventing too low a pressure differential between the cooling air in the passage surrounding the insert and the hot compressed gas flowing over the airfoil, which would inhibit adequate film cooling.

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Winter Park, FL, United States of America

Theodore Papageorgiou