Patent ID: 7997085
Filing Date: 2011-08-16
Classification: F01D,F02C,Y02T

Abstract:
1. A method for assembling a gas turbine engine assembly including a core gas turbine engine, a low-pressure turbine, a starter, and a generator, said method comprising: coupling a starter to the core gas turbine engine using a first drive shaft and a first rotor shaft that is coupled to the first drive shaft, wherein the starter is coupled to the first drive shaft by a first pinion, and wherein the starter comprises a motor/generator that is configured to rotate the core gas turbine engine when operating in a first mode and to generate electrical energy when operating in a second mode; coupling a clutch between the starter and the core gas turbine engine, wherein the clutch is engaged in the first mode and disengaged in the second mode; inserting a second drive shaft into the first drive shaft; inserting a second rotor shaft into the first rotor shaft; and coupling a generator to the low-pressure turbine using the second drive shaft and the second rotor shaft, wherein the generator is coupled to the second drive shaft by a second pinion that is substantially coaxial with the first pinion, where a rotation of the generator is independent of a rotation of the first drive shaft.