Patent ID: 9677570
Date: 2017-06-13
CPC Classifications: F01D,F02C,F04D,F05D,Y02T

Claim:
1. A fan containment system for fitment around an array of radially extending fan blades mounted on a hub in an axial gas turbine engine, the fan containment system comprising: a fan case having an annular casing element for encircling an array of fan blades and a hook projecting in a generally radially inward direction from the annular casing element and positioned axially forward of an array of fan blades when the fan containment system is fitted around said fan blades; and an annular fan track liner comprising a plurality of adjacent arcuate fan track liner panels, wherein each fan track liner panel is connected to the fan case at the hook via one or more fasteners configured to permit movement of the fan track liner panel relative to the hook such that the fan track liner panel is pivotable towards the annular casing element when a released fan blade impacts the fan track liner panel, at least a portion of each fan track liner panel is shaped so as to accommodate travel of a released fan blade having a trajectory that passes near a boundary between adjacent fan track liner panels, and at least a portion of an edge of each fan track liner panel is shaped to extend in an axially forward direction to a position circumferentially offset from an axially rearward position of said edge.