SHAFT DISPLACEMENT CONTROL

摘要

An aircraft powerplant (52) has a shaft (54) with a bladed air moving device (56, 58) disposed within an enclosure that forms a flow path, a bearing assembly (60) supportingly coupled to the shaft and a squeeze-film damper (62) positioned between the bearing assembly and a housing. The squeeze-film damper includes a plurality of sectors (64) that are each in fluid communication with a fluid pressure source. A controller (72) is used to operate upon sensed aircraft motion and regulate pressure in the plurality of sectors to influence a clearance between the bladed air moving device and the enclosure.