General Electric Company
Variable stator vane actuator overload indicating bushing

Abstract:

A bushing includes cylindrical body depending from preferably annular polygonal flange, bore extending through flange and body, and at least one overload indicator. Overload indicator may be frangible such as frangible tab at distal end of indicator tab depending from body or frangible coupons extending between forward and aft sections of polygonal flange. Frangible tab and coupons may include distinctive mark discernible or visible under visible or ultraviolet light. Bushing may be used in unison ring of high pressure compressor assembly to connect lever arms, coupled to variable vanes, to unison ring. Pins disposed in bore of bushing couple arm to unison ring. Forward and aft overhangs may depend from forward and aft sections of polygonal flange and overhang forward and aft annular sides of unison ring.