DETECTING CONDITION OF A SHAFT OF A GAS TURBOFAN AIRCRAFT ENGINE

Apparatus and associated methods are disclosed that relate to detecting a shaft condition of a gas turbofan engine (10). Shaft condition is detected based on sensed rotation rates of the shaft at different shaft locations. If the sensed rotations rates of the shaft at the two different shaft locatio...

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Bibliographische Detailangaben
Hauptverfasser:	GOSSE, James A, MAROTTA, Edward John, BLACKWELL, Geoffrey T
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS ENGINE PLANTS IN GENERAL GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	Apparatus and associated methods are disclosed that relate to detecting a shaft condition of a gas turbofan engine (10). Shaft condition is detected based on sensed rotation rates of the shaft at different shaft locations. If the sensed rotations rates of the shaft at the two different shaft locations are indicative of a compromised shaft, such as, for example, a shaft that has sheared, then a fuel cut-off signal is generated. The fuel cut-off signal is then sent to a fuel cut-off valve so as to cut off the fuel supplied to the gas turbofan engine. In some embodiments, shaft condition is determined based on a difference between scaled rotation rates of the shaft at two different shaft locations.