公开(公告)号：US11319061B2

公开(公告)日：2022-05-03

申请号：US16621178

申请日：2018-06-28

Applicant: LEONARDO S.P.A.

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

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

Abstract: 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.

公开(公告)号：US20210229199A1

公开(公告)日：2021-07-29

申请号：US17055030

申请日：2019-10-17

Applicant: LEONARDO S.P.A.

Inventor： Dario Colombo ,  Roberto Regonini ,  Sergio Fiorio

IPC: B23G1/16 ,  B23P6/00 ,  B64F5/40 ,  B23B49/02

Abstract: It is described a method for reconditioning a damaged thread of a transmission of a hover-capable aircraft; the damaged thread being arranged inside a first hole of the transmission; wherein the method includes the following steps: i) centering a tool on the first hole; ii) inserting a first tool inside the tool centred on the first hole and removing the damaged thread through the first tool; iii) inserting a second tool inside the tool and creating a new thread inside the first hole having a diameter larger than the one of the damaged thread; iv) screwing an insert having a thread inside the new thread, so that the insert engages the first hole and defines a reconditioned thread; and v) keeping the transmission mounted on the hover-capable aircraft during steps i), ii), iii), iv).

公开(公告)号：US20170198814A1

公开(公告)日：2017-07-13

申请号：US15326408

申请日：2015-07-17

Applicant: LEONARDO S.p.A.

Inventor： Dario Colombo ,  Giuseppe Gasparini ,  Paolo Pisani

IPC: F16J15/34

CPC classification number: F16J15/3412

Abstract: A sealing ring for a seal assembly is described that comprises: a main body rotating about an axis; and a first surface, which is defined by the main body, extends transversely to the axis and is suitable for abutting against a further sealing ring in a direction parallel to the axis; the first surface comprises a plurality of grooves forming respective hydropads; the grooves are delimited by a first edge and a second edge facing one another; the first edge and the second edge delimit the grooves in a circumferential direction to said axis; at least one of the first edge and the second edge is shaped like an elliptical arc, which has coincident or separate foci;comprises first grooves and second grooves alternating with one another in a circumferential direction to said axis and staggered from each other in a radial direction to said axis.

公开(公告)号：US09989153B2

公开(公告)日：2018-06-05

申请号：US15326408

申请日：2015-07-17

Applicant: LEONARDO S.p.A.

Inventor： Dario Colombo ,  Giuseppe Gasparini ,  Paolo Pisani

IPC: F16J15/34

CPC classification number: F16J15/3412

Abstract: A sealing ring for a seal assembly is described that comprises: a main body rotating about an axis; and a first surface, which is defined by the main body, extends transversely to the axis and is suitable for abutting against a further sealing ring in a direction parallel to the axis; the first surface comprises a plurality of grooves forming respective hydropads; the grooves are delimited by a first edge and a second edge facing one another; the first edge and the second edge delimit the grooves in a circumferential direction to said axis; at least one of the first edge and the second edge is shaped like an elliptical arc, which has coincident or separate foci;comprises first grooves and second grooves alternating with one another in a circumferential direction to said axis and staggered from each other in a radial direction to said axis.