公开(公告)号：US11267561B2

公开(公告)日：2022-03-08

申请号：US16664675

申请日：2019-10-25

Applicant: Bell Textron Inc.

Inventor： David Heverly ,  Frank Bradley Stamps ,  Jouyoung Jason Choi ,  Michael R. Smith ,  Thomas C. Parham

IPC: B64C27/00 ,  B64C11/00

Abstract: A vibration attenuator for a rotor of an aircraft has a track housing adapted for rotation relative to the rotor and configured for rotation at a second angular velocity greater than a first angular velocity of the rotor. A track is located within the track housing and has a reaction surface, a pair of weights being configured for movement within the track and in contact with the reaction surface. A stop assembly has a pair of stops spaced 180 degrees apart, the stops separating the weights from each other, and each weight being allowed to travel within the track between the stops. A motor rotates the track housing relative to the rotor. The weights are free to travel relative to each other between a minimum-force configuration, in which the weights are positioned 180 degrees apart, and a maximum-force configuration, in which both weights are adjacent one of the stops.