SHAFT DISPLACEMENT CONTROL

摘要

An aircraft powerplant having a shaft is disclosed in one embodiment in which a squeeze-film damper is used. The squeeze-film damper includes a plurality of sectors having a working fluid. A pressure can be controlled in the working fluid to the sectors to discourage changes in the sectors as a result of vehicle maneuvering. A controller is used to operate upon sensed aircraft motion and regulate pressure in the sectors.

主权项

1. An apparatus comprising:
a vehicle powerplant structured to provide power and having a shaft structured to rotate with a bladed air moving device disposed within an enclosure that forms a flow path; a bearing assembly supportingly coupled with the shaft; a squeeze-film damper positioned between the bearing assembly and a housing structured to contain the bearing assembly, the squeeze-film damper having a plurality of sectors that are each in fluid communication with a fluid pressure source; and a controller structured to operate upon a sensed vehicle motion and provide a fluid pressure for the plurality of sectors to influence a clearance between the bladed air moving device and the enclosure.