APPARATUS AND METHOD FOR ASSEMBLING A DAMPER BEARING ASSEMBLY

摘要

A damper bearing assembly for a gas turbine engine is disclosed. The damper bearing assembly is designed to define forward and aft axial gaps which allow for normal deflection under standard operating thrust loads, but then close during a fan blade out event to allow the increased load to transfer to the damper housing. Frictional forces between contacting parts limit torsional windup and increase torsional resistance with increasing load. The damper bearing assembly includes a damper housing configured substantially within a U-shaped spring finger housing and a spanner nut with a radial hook portion coupled to the spring finger housing. The damper housing is coupled to the spring finger housing such that it is substantially confined within the U-shaped void. The spanner nut is coupled to the spring finger housing such that the radial hook portion is configured to limit the deflection of the spring finger housing and damper housing during a fan blade out event.

主权项

1. A bearing assembly for a gas turbine engine, said assembly comprising:
a spring finger housing comprising a first portion and a second portion that are coupled together such that said first portion is substantially perpendicular to said second portion; a damper housing including a radially inner platform comprising an aft face, a forward face, and a radially inner surface positioned therebetween, said damper housing coupled within said spring finger housing such that a first axial gap is defined between said forward face and said first portion; and a spanner nut coupled to a radially inner surface of the second portion, wherein said spanner nut includes a hook portion that defines a second axial gap between said aft face and said hook portion.