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    Rotor for a hover-capable aircraft
    2.
    发明授权
    Rotor for a hover-capable aircraft 有权

    公开(公告)号：US11319061B2

    公开(公告)日：2022-05-03

    申请号：US16621178

    申请日：2018-06-28

    申请人： LEONARDO S.P.A.

    发明人： Attilio Colombo ,  Luigi Bottasso ,  Paolo Pisani ,  Andrea Favarotto ,  Dario Colombo ,  Federico Montagna ,  Roberto Regonini ,  Francesco Braghin ,  Simone Cinquemani

    IPC分类号： B64C27/04 ,  B64C27/00 ,  B64C27/08 ,  F16H1/06 ,  F16H1/16 ,  F16H1/28

    摘要： A rotor for an aircraft is described that comprises: a hub rotatable about an axis and, in turn, comprising a plurality of blades; a mast connectable to a drive member of the aircraft and connected to the hub to drive the hub in rotation about the axis; and damping means to dampen the transmission of vibrations to the mast in a plane orthogonal to the axis; the damping means comprising at least a first mass and a second mass that can eccentrically rotate about the axis with a first and a second speed of rotation, respectively; the first mass and second mass are operatively connected to the mast to generate, respectively, a first and a second damping force on the mast having a main component in a direction radial to the axis; the rotor comprises a transmission unit, which is interposed between the mast and the first and second masses so as to drive the first and second masses in rotation.

    ROTOR FOR A HOVER-CAPABLE AIRCRAFT
    3.
    发明申请
    ROTOR FOR A HOVER-CAPABLE AIRCRAFT 有权

    公开(公告)号：US20220258855A1

    公开(公告)日：2022-08-18

    申请号：US17619107

    申请日：2020-05-26

    申请人： LEONARDO S.P.A.

    发明人： Attilio Colombo ,  Gabriele Cazzulani ,  Simone Cinquemani ,  Ferruccio Resta ,  Francesco Braghin

    IPC分类号： B64C27/00 ,  B64C27/06 ,  B64C27/46

    摘要： A rotor for a hover-capable aircraft is described that comprises: a hub rotating about an axis and, in turn, comprising a plurality of blades, a mast connectable to a power unit of the aircraft and operatively connected to the hub to drive the hub in rotation about said axis, and an attenuating device to attenuate the transmission of vibrations from the mast to the aircraft parallel to said; the attenuating device, in turn, comprising a casing, a first mass free to oscillate parallel to said axis with respect to the casing and elastically connected to the casing, a second mass free to oscillate parallel to said axis, connection means adapted to make the first and second masses integrally movable along said axis when the angular speed of the mast assumes a first value, and actuator means activatable to decouple the first and second masses when the angular speed of the mast assumes a second value, different from the first value.

    Helicopter kit
    5.
    发明授权
    Helicopter kit 有权

    公开(公告)号：US11433995B2

    公开(公告)日：2022-09-06

    申请号：US16763043

    申请日：2019-06-28

    申请人： LEONARDO S.P.A.

    发明人： Luigi Bottasso ,  Attilio Colombo ,  Pierangelo Masarati ,  Aykut Tamer ,  Giuseppe Quaranta

    IPC分类号： B64C27/00 ,  B64C27/06 ,  F16F7/10 ,  F16F15/02 ,  F16H25/22

    摘要： A kit for a helicopter is described, the helicopter comprising a fuselage and a rotor; the kit comprises at least one device adapted to dampen the vibrations transmitted from the rotor to the fuselage and to be interposed between the fuselage and the rotor; the device, in turn, comprises a first threaded element operatively connectable to the rotor and adapted to, in use, vibrate parallel to a first axis; a second threaded element operatively connectable to the fuselage and operatively connected to the first threaded element so as to, in use, rotationally vibrate about the first axis; and a plurality of threaded rollers, which are screwed on the first and second threaded elements; the rollers being rotatable about their respective second axes parallel to and separate from the first axis with respect to the first and second threaded elements; the rollers are also rotatable about the first axis with respect to the first threaded element and the second threaded element.

    Helicopter kit
    6.
    发明授权
    Helicopter kit 有权

    公开(公告)号：US11247771B2

    公开(公告)日：2022-02-15

    申请号：US16763802

    申请日：2019-06-28

    申请人： LEONARDO S.P.A.

    发明人： Luigi Bottasso ,  Attilio Colombo ,  Pierangelo Masarati ,  Aykut Tamer ,  Giuseppe Quaranta

    IPC分类号： B64C27/00 ,  F16F7/10

    摘要： A kit is described that comprises a device adapted to dampen the vibrations transmitted by the rotor to the fuselage; the device comprises two first elements movable along a first axis; two second elements rotatable about the first axis; a first inerter with a first female screw, a first screw, and first rollers rotatable about respective second axes and around the first axis with respect to the first female screw and first screw; a second inerter with a second female screw, a second screw operatively connected to the second female screw; and a plurality of second rollers rotatable about second axes and around the first axis with respect to the second female screw and second screw; the first and second female screws defining the first threaded elements, and the first and second screws defining the second threaded elements; or the first and second screws defining the first threaded elements and the first and second female screws defining the second threaded elements.