Ducted fan gas turbine engine

Power plants – Reaction motor – With destruction sensing and preventing means

Patent

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Details

602261, F02C 706, F02K 304

Patent

active

06098399&

ABSTRACT:
A ducted fan gas turbine has a fan shaft which is supported at its upstream end by a bearing. In the event of damage to the engine's fan, frangible bolts fracture to permit radial movement of the shaft. That movement is limited by the sequential engagement of the outer race of the bearing with first and second movement limiting portions on fixed structure of the engine. This alters the natural frequency of vibration of the fan, so permitting the fan to windmill without excessive vibration.

REFERENCES:
patent: 4201513 (1980-05-01), Sales
patent: 5433584 (1995-07-01), Amin et al.

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