Dual output variable pitch turbofan actuation system

Details Dual output variable pitch turbofan actuation system Dual output variable pitch turbofan actuation system

F - Mech Eng,Light,Heat,Weapons

02

K

170/65, 60/82

F02K 3/12 (2006.01) F04D 29/32 (2006.01)

Patent

CA 1068493

Abstract of the Disclosure An improved actuating mechanism is provided for a gas turbine engine incorporating fan blades of the variable pitch variety, the actuator adapted to rotate the individual fan blades within apertures in an associated fan disc. The actuator includes means such as a pair of synchronizing ring gears, one on each side of the blade shanks, and adapted to engage pinions disposed thereon. Means are provided to impart rotation to the ring gears in opposite directions to effect rotation of the blade shanks in response to a predetermined input signal. In the event of system failure, a run-away actuator is prevented by an improved braking device which arrests the mechanism.

249911

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