Fan track liner assembly
AssigneeROLLS-ROYCE plc
InventorDale Edward EVANS
Life of this patent
Estimating the term…
Abstract
A fan track liner assembly for ducted fan engine which provides for reduced strain and deformation of front of fan case in the event of a fan blade off event. Various assemblies are proposed. In one aspect, assembly includes fan track liner panel and plurality of fasteners which are arranged to secure panel to fan case of engine, wherein: a forward portion of panel includes hinged portion which operates as trapdoor to permit blade or blade fragment to pass through, and fasteners are arranged to fail in the event of blade or blade fragment passing through trapdoor causing panel to be displaced rearwards in fan case. Other aspects provide for reduced height of support on fan case for attaching fan track liner and for collapsible comb box.
Claims14
An assembly for a fan track liner in a ducted fan engine, the assembly including
- a fan track liner panel and
- a plurality of fasteners which are arranged to secure said panel to a fan case of the engine, wherein:
- a forward portion of said panel includes a hinged portion which operates as a trapdoor to permit a blade or blade fragment to pass through it, and
- the fasteners are arranged to fail in the event of a blade or blade fragment passing through said trapdoor thereby causing the panel to be displaced rearwards in the fan case.
An assembly for a fan track liner for a fan engine, the assembly including:
- a plurality of panels, a forward portion of said panels including a hinged portion which operates as a trapdoor to permit a blade or blade fragment to pass through it;
- and
- a plurality of first fastening members and second fastening members which are arranged to secure the panels to a fan case of the engine, wherein:
- each first fastening member has:
- either a substantially C-shaped profile or a substantially T-shaped profile which is arranged to engage with a circumferential rail section located on the fan case;
- and
- a fastening portion which is arranged to engage with a second fastening member to secure one of said panels to the fan case.
Dependencies are inferred from the claim text.