Vibration damper mechanism, and a flying machine including a carrier structure and a rotor provided with such a mechanism

A mechanism for damping vibrations to prevent coupling of vibration modes of the carrier structure with vibration modes of a rotor secured to the carrier structure, wherein the mechanism comprises:

• a support suitable for being fastened to the rotor, the support having a plurality of arms defining a plane and having a central axis extending orthogonally to the plane;
• at least one resonator for opposing vibrations over a first frequency range, the resonator including a mass carried by the support via mobile mounting means for mounting the mass to move on the support, the mobile mounting means having a central axis extending through the mobile mounting means parallel to the central axis of the support;
• and
• damper means for damping the resonator and opposing vibration over a second frequency range wider than the first frequency range, the damper means being interposed between adjacent engagement members, wherein the mobile mounting means comprise one hinged arm per mass, with each hinged arm being arranged as a lever arm and being hinged to the support and to the damper means and carrying the mass at another end, the mass having a center of mass and being supported by the mobile mounting means such that the center of mass of the mass is along the central axis of the mobile mounting means.

A mechanism for damping vibrations to prevent coupling of vibration modes of the carrier structure with vibration modes of a rotor having a plurality of blades defining a plane of rotation of the rotor and secured to the carrier structure, wherein the mechanism comprises:

• a support configured to fasten to the rotor with the support above the plane of rotation, the support having a plurality of branches extending radially outward and having mobile mounting means hinged to the distal ends of the branches;
• at least one resonator including a mass carried by the support via the mobile mounting means for mounting the mass to move on the support, the mobile mounting means being pivotable about a pivot axis that is parallel to a support axis of rotation such that the mass is carried in a pendular manner;
• and
• damper means for damping the resonator, the damper means being interposed between adjacent engagement members, wherein the mobile mounting means comprise one hinged arm per mass, each hinged arm being arranged as a lever arm, being hinged to the support and being hinged to the damper means at a first end and carrying the mass at a second end.