Device with distributed masses for reducing the vibration caused by a lift rotor of a rotorcraft, and hub of a rotor provided with such a device

摘要

The device (1) has a support (10) secured in rotation around a rotation axis (AX) of a lift rotor. Main oscillating masses (22) are distributed around the support by being connected to the support through a deformable unit (30), where each main mass is provided with recesses (21', 22'). Each main mass is forced to move only in a horizontal plane (P) by the deformable unit. Each main mass is provided with secondary oscillating masses (41, 42) suspended within the recesses by elastic units (50) so as to move in a direction perpendicular to the horizontal plane. An independent claim is also included for a hub for a lift rotor of a rotorcraft, comprising an upper part integrated to a support of a vibration reducing device.