LOW SPOOL STARTER SYSTEM FOR GAS TURBINE ENGINE

摘要

A gas turbine engine 10 comprises a first compressor 14, a second compressor 18, a starter generator 12 and a clutch 16. The starter generator 12 is coupled to the first compressor 14. The clutch 16 selectively couples the second compressor 18 and the first compressor 14. The clutch 16 is disposed between a first shaft 78B and a second shaft 22 to engage the first shaft 78B with the second shaft 22 at rest. A flyweight system is engaged with the clutch mechanism to permit freewheeling of the first shaft 78B relative to the second shaft 22 when subject to rotational motion beyond a threshold speed. A method for starting a gas turbine engine 10 comprises engaging a low pressure compressor 14 with a high pressure compressor 18 utilizing a clutch 16, rotating the low pressure compressor 14 and the high pressure compressor 18 utilizing a starter generator 12 coupled to the low pressure compressor 14, igniting the gas turbine engine 10, and disengaging the clutch 16 at an operational speed of the gas turbine engine 10.