公开(公告)号：US11060584B2

公开(公告)日：2021-07-13

申请号：US16425062

申请日：2019-05-29

Applicant: General Electric Company ,  GE Avio S.r.l.

Inventor： Luca Ronchiato ,  Michele Gravina ,  Joseph Robert Dickman

IPC: F01D25/28 ,  F16H1/48 ,  F02C3/04 ,  F02C7/36 ,  F02K3/06

Abstract: A gas turbine engine including a first frame including a first mount member defining a stiffness K1; a second frame including a second mount member defining a stiffness K2 and a third mount member defining a stiffness K3; and a gear assembly. The gear assembly includes a first rotatable component, a second rotatable component, and a torque transfer component. The first mount member is coupled to the first rotatable component. The second mount member is coupled to the second rotatable component. The third mount member is coupled to the torque transfer component. The stiffness K1 is less than or equal to 10% of the stiffness K3.

公开(公告)号：US10890247B2

公开(公告)日：2021-01-12

申请号：US16163985

申请日：2018-10-18

Applicant: GE AVIO S.R.L

Inventor： Michele Gravina

IPC: F16H57/04 ,  F02C7/36 ,  F01D25/18 ,  F16H1/28 ,  F02K3/06 ,  F02C7/06

Abstract: An epicyclic gearbox assembly for a gas turbine engine includes a sun gear assembly; a planet gear assembly engaged with the sun gear assembly; and a ring gear assembly including one or more ring gears engaged with the planet gear assembly. The epicyclic gearbox assembly further includes a lubrication fluid collection assembly having a rotating oil scoop extending in a circumferential direction around the ring gear assembly, the rotating oil scoop coupled to the ring gear assembly at a location forward of one or more ring gears of the ring gear assembly.

公开(公告)号：US10711880B2

公开(公告)日：2020-07-14

申请号：US15921490

申请日：2018-03-14

Applicant: GE Avio S.r.l.

Inventor： Michele Gravina ,  Giuseppe Casamirra

IPC: F16H1/28 ,  F16H57/08 ,  F02C3/107

Abstract: A planet-carrier for an epicyclic gearing is provided with a ring having a plurality of plate sectors and a plurality of connection sectors, alternating with one another about a first axis; a connection structure connects in an angularly fixed manner the connection sectors to a rotating member or to a static member; the planet-carrier is also provided with a plurality of pins, which are fixed with respect to the plate sectors and protrude in opposite directions from the plate sectors along respective second axes, parallel and eccentric with respect to the first axis; each pin has two coaxial outer surfaces, adapted to support respective planet gears of the gearing and symmetrical to each other with respect to a symmetry plane orthogonal to the first axis; the plate sectors are asymmetrical with respect to this symmetry plane.

公开(公告)号：US10663054B2

公开(公告)日：2020-05-26

申请号：US15492046

申请日：2017-04-20

Applicant: GE Avio S.r.l.

Inventor： Michele Gravina ,  Federico Dellavalle

IPC: F16H57/04 ,  F01D25/18 ,  F01D25/16 ,  F02C7/36 ,  F16H1/28 ,  F16H57/08 ,  F01D15/12

Abstract: An oil transfer unit has a rotating part extending along an axis, a stationary part provided with an oil mouth, and a floating part having a cylindrical surface fitted onto an outer cylindrical surface of the rotating part in a non-contact configuration; an annular groove is provided between the floating part and the rotating part to put the oil mouth into communication with an inner chamber of the rotating part; both sides of the groove are sealed by a hydrostatic seal defined by a radial gap between the cylindrical surfaces; the unit has at least one oil transfer tube, coupled to the stationary part and the floating part in a fluid-tight manner and with freedom of movement, and a connecting rod to prevent rotation of the floating part; the opposite ends of the connecting rod are coupled to the stationary part and floating part by respective spherical joints.

公开(公告)号：US20190178751A1

公开(公告)日：2019-06-13

申请号：US16308100

申请日：2017-06-02

Applicant: GE AVIO S.R.L.

Inventor： Michele Gravina ,  Elio Perona ,  Guido Rocca

IPC: G01M13/021 ,  G01N3/04 ,  G01N3/34

Abstract: A test apparatus for testing a gear having a central axis has a force application column moveable along a force application axis (F) so as to apply a force onto the flank of a tooth of the gear, and a clamping device having a clamping axis (A) orthogonal to and spaced apart from the force application axis. The clamping device secures the gear in such a manner that the central axis of the gear coincides with the clamping axis (A). The column has a first and a second end and one intermediate portion, which is elastically deformable so as to allow for a displacement of the second end in relation to the first end along a displacement direction (D1) orthogonal to the clamping axis (A) and to the force application axis (F).

公开(公告)号：US20190101024A1

公开(公告)日：2019-04-04

申请号：US16094892

申请日：2017-04-19

Applicant: GE AVIO S.R.L

Inventor： Michele Gravina

IPC: F01D25/18 ,  F01D25/16 ,  F02C7/36

Abstract: An assembly has a supporting element, rotatable about an axis, and an oil transfer unit, which has a stationary part and a rotating part, coupled in an angularly fixed position to the supporting member and defining an inner chamber permanently communicating with an oil mouth of the stationary part; the unit 1 further has a floating part, that is fitted onto an outer cylindrical surface of the rotating part and is coupled to the stationary part in an angularly fixed position and with a defined freedom of movement; the assembly further has a connection member coaxial to the rotating part and the supporting element 4 and including a first portion fixed to the rotating part, a second portion fixed to the supporting element and an intermediate portion, which is elastically flexible.

公开(公告)号：US20140309078A1

公开(公告)日：2014-10-16

申请号：US14356129

申请日：2012-11-02

Applicant: GE AVIO S.R.L.

Inventor： Edoardo Curti ,  Michele Gravina ,  Giulio Zagato ,  Luca Ronchiato ,  Elio Perona ,  Paolo Altamura

IPC: F16H1/28

CPC classification number: F16H1/28 ,  F02C7/36 ,  F05D2260/40311 ,  F16H1/2827 ,  F16H2001/289 ,  Y02T50/671

Abstract: An epicyclic gearing has a plurality of planet gears arranged about a transmission axis so as to form two arrays symmetrical with respect to a plane orthogonal to the transmission axis; the gearing has a body which, on one side, is adapted to be connected to a rotating member and, on the other side, is coupled to a ring; the ring has a plurality of relatively thin plate sectors and a plurality of pins, which extend in cantilever fashion and in opposite directions from the plate sectors and each support a respective planet gear; coupling between the aforesaid body and the ring defines at least one degree of freedom in rotation about a radial axis to allow a relative movement under load between the two components.

Abstract translation: 行星齿轮传动装置具有围绕传动轴布置的多个行星齿轮，以形成相对于与传动轴正交的平面对称的两个阵列; 传动装置具有一体，其一侧适于连接到旋转部件，另一侧与环相连; 环具有多个相对较薄的板扇区和多个销，其以悬臂方式延伸并且在与板扇区相反的方向上延伸，并且每个支撑相应的行星齿轮; 上述主体和环之间的联接限定了围绕径向轴线的至少一个旋转自由度，以允许两个部件之间的负载下的相对运动。