Patent ID: 8568102
Filing Date: 2013-10-29
Classification: F01D,F05D,Y10T

Abstract:
1. A fan blade anti-fretting arrangement to prevent wear between a root portion of a fan blade and a root slot of a rotor fan hub of a turbo fan engine, the anti-fretting arrangement comprising a U-shaped insert member formed of a composite spring material having a memory, said insert member defining a bottom wall portion abutting an outer surface portion of the rotor fan hub between adjacent fan blades and opposed side wall portions formed integral with said bottom wall portion, said side wall portions being dimensioned to push at an upper end thereof against a platform connection of the adjacent fan blades, said insert member being dimensioned to exert a pushing force against the connection platform of the adjacent fan blades and a pulling force on the root portion to prevent rocking of the root portion in the root slot at low rotational speeds.