Patent ID: 6439772
Filing Date: 2002-08-27
Classification: F01D,F16C,Y10T

Abstract:
A method for assembling a gas turbine engine rotor assembly to facilitate reducing dynamic loading of the rotor assembly, the rotor assembly including a rotor shaft, a sump housing, a damper sub-assembly, and a bearing assembly including an inner race, an outer race, a plurality of rolling elements, a plurality of springs, the rolling elements between the inner and outer races, the damper sub-assembly including an annular damper insert, said method comprising the steps of:supporting the rotor shaft on the mounting frame with the bearing assembly; coupling the bearing assembly outer race to the sump housing with the plurality of springs; and coupling the damper sub-assembly within the engine such that the bearing assembly outer race deflects during engine operation to substantially match a distortion pattern of the damper insert.