METHOD AND DEVICE FOR INSULATING HEAT IN GAS TURBINE ENGINE BEARING

摘要

PROBLEM TO BE SOLVED: To provide a bearing heat insulating system for effectively separating a bearing assembly from a rotor shaft. SOLUTION: A gas turbine engine 10 including a rotor shaft 26 includes a heat insulating system 40 including a heat insulating shaft 110 and a pair of pilots 120 and 122. The pilots are arranged between the heat insulating shaft and the rotor shaft, and the heat insulating shaft is connected to the rotor shaft so as to form a clearance 130 between the heat insulating shaft and the rotor shaft. The pilots are positioned in the axial direction along the rotor shaft, and the heat insulating shaft can be moved in the axial direction in relation to the rotor shaft. Each pilot includes plural openings for communicating the cooling air inside of the clearance defined between the heat insulating shaft and the rotor shaft.