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A rotor assembly for a gas turbine engine including a bearing assembly and a damper sub-assembly that facilitate reducing dynamic motion to the rotor assembly is described. The bearing assembly includes rolling elements positioned between a paired race. The rotor assembly includes a rotor shaft supp

A rotor assembly for a gas turbine engine including a bearing assembly and a damper sub-assembly that facilitate reducing dynamic motion to the rotor assembly is described. The bearing assembly includes rolling elements positioned between a paired race. The rotor assembly includes a rotor shaft supported by the bearing assembly. The damper sub-assembly is radially outward from the bearing assembly adjacent a sump housing, and includes a damper insert. A predetermined preload force is applied to the rolling elements. An outer race of the bearing assembly distorts to substantially match a distortion pattern of the damper insert.

대표청구항 ▼

1. 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 elemen

1. 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.