Patent ID: 11965424
Assignee: GENERAL ELECTRIC COMPANY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 17:
18. A method for providing overspeed protection for a gas turbine engine, the gas turbine engine having an engine shaft, the method comprising:
monitoring, via an overspeed protection system, a torque of the engine shaft;
determining, via the overspeed protection system, a speed condition of the engine shaft;
evaluating whether a torque conditional is satisfied based upon the torque of the engine shaft and a torque threshold, the torque conditional being satisfied when the torque of the engine exceeds the torque threshold;
evaluating whether an overspeed conditional is satisfied based upon the speed condition of the engine shaft and a speed threshold, the overspeed conditional being satisfied when the speed condition of the engine shaft exceeds the speed threshold;
determining, via the overspeed protection system, that an overspeed condition is present within the gas turbine engine when both the torque conditional is satisfied and the overspeed conditional is satisfied, the overspeed condition being indicative of an above normal rotational speed of the engine shaft; and
initiating a shutdown procedure for the gas turbine engine in response to the determined overspeed condition to reduce the rotational speed of the engine shaft.