Patent ID: 11866159
Assignee: LEONARDO S.P.A.
Field: Transport (Mechanical engineering)
Classification: CPC B  F | IPC B

Claim 0:
1. A rotor (3) for a hover-capable aircraft (1), comprising:
a hub (5) rotating about an axis (A) and, in turn, comprising a plurality of blades (9);
a mast (6) connectable to a power unit of said aircraft (1) and operatively connected to said hub (5) to drive said hub (5) in rotation about said axis (A); and
an attenuating device (15) to attenuate the transmission of vibrations from said mast (6) to said aircraft (1) parallel to said axis (A);, said attenuating device (15), in turn, comprising:
a casing (20); —a first mass (21) free to oscillate parallel to said axis (A) with respect to said casing (20) and elastically connected to said casing (20);, characterized in that said attenuating device (15) is passive and further comprises:
a second mass (25);
connection means (30) adapted to make said first and second masses (21, 25) integrally movable along said axis (A) when an angular speed (Ω) of said mast (6) assumes a first value (Ω1); and
actuator means (35) activatable to decouple and separate said first and second masses (21, 25) with respect to translation along said axis (A) when said angular speed (Ω) of said mast (6) assumes a second value (Ω2), different from said first value (Ω1);, wherein said attenuating device (15) is angularly integral with said mast (6);, wherein said mast (6) is hollow and in that said attenuating device (15) is housed inside said mast (6).