Patent ID: 7971499
Filing Date: 2011-07-05
Classification: F02C,F05D,F16H,Y10T

Abstract:
1. A method for synchronization of multiple generators in a gas turbine engine comprising the steps of: locking an input gear and an idler gear, wherein the input gear engages the idler gear; rotating a drive gear shaft, the drive gear shaft comprising a helical generator drive gear and a fine pitch spline, the drive gear shaft rotationally mounted on a thrust bearing assembly and coupled to a gear mounting flange via the thrust bearing assembly, wherein the generator drive gear is engaged by the idler gear; positioning the drive gear shaft to a desired degree of alignment with an intermediate shaft, wherein the intermediate shaft is connected to the drive gear shaft through the fine pitch spline; advancing the helical generator drive gear axially by varying a thickness of a shim to fine tune the degree of alignment, wherein the shim is disposed between, and engages, the thrust bearing assembly and the gear mounting flange; clamping the generator drive gear in position; and repeating all the steps above for each additional generator to be synchronized.