Method and apparatus for supporting rotor assemblies during unbalances

A rotor assembly for a gas turbine engine, said bearing assembly comprising:

• a paired race comprising an outer race and an inner race;
• a bearing between said inner and outer races, said bearing configured to couple to a shaft cone to support the rotor on a support frame;
• a mounting race comprising an upstream side, a downstream side, and a spherical surface extending therebetween, said race configured to reduce dynamic loads to the gas turbine engine structure and static bending to the rotor;
• and
• a retainer coupled to at least one of said mounting race upstream and downstream said retainer inducing an axial pre-load to said mounting race.

A rotor assembly comprising:

• a rotor shaft;
• a shaft cone;
• a support frame;
• and
• a bearing assembly coupled to said shaft cone and supporting said rotor shaft to said support frame and configured to reduce dynamic loads to said support frame, said bearing assembly comprising a paired race, a rolling element, a retainer, and a mounting race, said paired race comprising an outer race and an inner race, said rolling element is positioned between said outer and inner races, said mounting race comprising an upstream side, a downstream side, and a spherical surface extending therebetween, said retainer configured to couple to at least one of said mounting race upstream side and said downstream side for inducing a pre-determined axial pre-load to at least one of said bearing assembly and said mounting race.