Bearing thermal relief fan drive gear system assembly method
AssigneeUnited Technologies Corporation
InventorsNing Lin, Berci Cherpician
Life of this patent
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Abstract
A method of assembling mating components includes the steps of heating an inner surface of a first cavity of a first part to generate a first expansion, heating an outer surface of a component surrounding an outer periphery of the first part to generate a second expansion of the component that corresponds to the first expansion of the first part, inserting a second part into the first cavity while the first part is in an expanded condition, and cooling the first part to contract around the second part.
Claims15
A method of assembling mating components comprising the steps of:
- heating an inner surface of a first cavity of a first part to generate a first expansion;
- heating an outer surface of a component surrounding an outer periphery of the first part to generate a second expansion of the component that corresponds to the first expansion of the first part;
- inserting a second part into the first cavity while the first part is in an expanded condition;
- and
- cooling the first part to contract around the second part.
A method of mating shaft sections for a gas turbine engine, the method comprising the steps of:
- assembling a bearing assembly about an outer surface of a first shaft;
- heating an inner race of the bearing assembly;
- heating an outer race of the bearing assembly separately from heating of the inner race and at the same time as heating the inner race;
- inserting a portion of a second shaft into a cavity of the first shaft;
- and
- cooling the first shaft, the second shaft, the inner race and the outer race of the bearing assembly such that the first shaft shrinks onto the second shaft.
Dependencies are inferred from the claim text.