Shaft breakage detection apparatus

F - Mech Eng,Light,Heat,Weapons – 01 – D

Patent

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Details

F01D 21/04 (2006.01) F01D 21/06 (2006.01) F02C 9/46 (2006.01)

Patent

CA 2333996

The present invention is addressed to a control logic for determining the occurrence of shaft decoupling in a gas turbine engine. The control logic in the preferred embodiment receives inputs for shaft rotational speed and/or compressor pressure and uses these parameters for making a determination of shaft decoupling in fractions of a second, before serious damage to the gas turbine engine can occur. The control logic also utilizes multiple interval sampling, and sampling over multiple channels to verify any determination of shaft decoupling. Once a shaft decouple has been verified, fuel flow to the engine is cut off, thus shutting down the engine.

Cette invention a trait à une logique de commande permettant de constater un découplage d'arbre dans un moteur à turbine. Dans le mode de réalisation préféré, la logique de commande, qui reçoit des entrées relatives à la vitesse de rotation de l'arbre et/ou à la pression du compresseur, utilise ces paramètres pour diagnostiquer un découplage d'arbre en quelques fractions de seconde avant que la turbine ne soit gravement endommagée. Cette logique de commande procède également à plusieurs échantillonnages par intervalles ainsi qu'à un échantillonnage sur plusieurs canaux afin de vérifier toute constatation de découplage d'arbre. Si celui-ci est diagnostiqué, le débit carburant cesse et le moteur s'arrête.

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