Patent ID: 8182230
Filing Date: 2012-05-22
Classification: F01D,Y10T

Abstract:
1. A fan blade for a turbofan gas turbine engine, the blade including a blade root at one end thereof configured for sliding insertion into a substantially axially extending slot defined in a periphery of a fan rotor hub, the slot extending from a front side of the hub to a back side, the blade root having side faces respectively corresponding to the front and back sides of the hub, the blade root also having a bottom face which opposes the slot when the blade is inserted in the slot, the blade comprising: a first passageway extending at least partially through the blade root from one of said side faces of the blade root in a direction generally parallel to an axial direction of the slot, the first passageway having an entrance in one of said side faces disposed to be accessible to a service person when the blade is inserted in the slot; a second passageway extending at least partially through the blade root from the bottom face of the blade root to intersect with the first passageway; a first member provided in the first passageway, the first member configured to be retained in the first passageway once inserted therein; and a second member provided in the second passageway, the second member having one end in cooperating engagement with the first member such that movement of the first member in a direction of the first passageway causes the second member to move in a direction of the second passageway and extend outwardly, the second member thus having a portion projecting out of the bottom face of the blade root a distance sufficient to contact an inner surface of the slot and thereby force the blade outwardly in the slot.