Patent ID: 8616849
Filing Date: 2013-12-31
Classification: F01D,F05D

Abstract:
1. A fan blade platform assembly comprising a rotor fan hub, a plurality of fan blades and a plurality of plate inserts, the plate inserts shaped and dimensioned to span a gap formed between platforms of adjacent fan blades of a turbo fan engine, the plates and platforms providing a gaspath surface, the plate inserts retainingly engaged under arresting shoulders of said adjacent fan blades by spring forces exerted by a plurality of spring inserts held captive and in contact between said plate inserts and an outer surface of the rotor fan hub, wherein each of said spring inserts comprises a U-shaped insert member formed of a spring material having a memory, said U-shaped insert member defining a bottom wall portion adapted to abut said outer surface of said rotor fan hub between said adjacent fan blades and having opposed side wall portions dimensioned to abut at an upper end thereof against an inner face of said plate inserts and to exert a pushing force thereon.