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公开(公告)号：US20210088114A1
公开(公告)日：2021-03-25
申请号：US17020262
申请日：2020-09-14
Applicant: GE Avio S.r.l.
Inventor： Juraj Hrubec , Michele Gravina , Leonardo Coviello
Abstract: An apparatus and method for reducing planet gear misalignment of planet gears mounted on a planet-carrier in an epicyclic gearing. The apparatus and method of the present disclosure specifically provide for a stiffness-reducing feature, a pillar, and a side-plate, each with a respective stiffness. In several embodiments, the feature stiffness is less than the pillar stiffness which is at least 10% less than the side-plate stiffness. The stiffness-reducing feature and the pillar may make up a pylon which has an axis. The pylon axis may form an angle with the side plate which is less than 90° and greater than 20°.
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公开(公告)号：US20190112985A1
公开(公告)日：2019-04-18
申请号：US16163927
申请日：2018-10-18
Applicant: GE AVIO S.R.L
Inventor： Michele Gravina
CPC classification number: F02C7/36 , F02C3/113 , F02C7/06 , F02K3/06 , F05D2220/36 , F05D2260/40311 , F05D2260/98 , F16H57/046 , F16H57/0479 , F16H57/0486 , F16H57/082 , F16H2001/289
Abstract: An epicyclic gearbox includes a sun gear assembly, a planet gear assembly, and a ring gear assembly engaged with a forward planet gear and an aft planet gear of the planet gear assembly. A first axial shroud is also provided positioned forward of the forward planet gear or aft of the aft planet gear along an axial direction. The first axial shroud covers substantially all of a forward side of the forward planet gear or an aft side of the aft planet gear. The planet gear assembly is coupled to a planet gear carrier, the planet gear carrier including a radial shroud including one or more radial shroud surfaces extending along at least a portion of an outer circumference of the forward planet gear and along at least a portion of an outer circumference of the aft planet gear.
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公开(公告)号：US20250003482A1
公开(公告)日：2025-01-02
申请号：US18510014
申请日：2023-11-15
Applicant: GE Avio S.r.l.
Inventor： Miriam Manzoni , Michele Gravina , Federico Leonardi , Alessandro Anderlini
IPC: F16H57/04
Abstract: A lubrication system for a gear assembly. The gear assembly includes a first gear and a second gear. The first gear and the second gear mesh with each other at a mesh. The lubrication system includes one or more lubricant injectors. The one or more lubricant injectors include one or more first lubricant outlets directed to the mesh. The one or more first lubricant outlets supply a first portion of lubricant to the mesh. The one or more lubricant injectors include one or more second lubricant outlets directed to a location that is different than the mesh. The one or more second lubricant outlets supply a second portion of lubricant to the location different than the mesh.
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公开(公告)号：US20240280170A1
公开(公告)日：2024-08-22
申请号：US18477960
申请日：2023-09-29
Applicant: GE Avio S.r.l.
Inventor： Michele Gravina , Miriam Manzoni , Federico Leonardi , Andrea Piazza
IPC: F16H57/04
CPC classification number: F16H57/0471 , F16H57/0424 , F16H57/0428 , F16H57/0443 , F02C7/36
Abstract: A gearbox assembly includes a plurality of planet gears secured by a planet carrier. The plurality of planet gears and the planet carrier rotate about a longitudinal centerline axis. A planet pin is disposed in each planet gear. One or more journal bearings are defined by the planet pin and the planet gear, each planet gear rotating about the one or more journal bearings. The gearbox assembly includes an auxiliary lubrication system that stores lubricant therein. The auxiliary lubrication system includes one or more lubricant lines that provide fluid communication between the auxiliary lubrication system and the one or more journal bearings. Rotation of the planet carrier and the one or more journal bearings generates a suction effect that causes the lubricant in the auxiliary lubrication system to flow to the one or more journal bearings during windmilling conditions and during zero gravity conditions or negative gravity conditions.
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公开(公告)号：US20200319059A1
公开(公告)日：2020-10-08
申请号：US16303544
申请日：2017-06-02
Applicant: GE AVIO S.R.L
Inventor： Michele Gravina , Guido Rocca
IPC: G01M13/021 , G01N3/04
Abstract: A test apparatus for testing a gear has a clamping device for clamping the gear. The device includes a single support block having one passage, extending along an axis, and a transversal first shoulder. The device further includes a securing bolt having a second shoulder provided with a pin axially extending through the passage and with a tightening member tightened on the pin so as to axially clamp the gear between the two shoulders. The support block further has a fixed protrusion axially projecting with respect to the first shoulder and having an outer surface designed to carry the gear.
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Patent Agency Ranking
公开(公告)号：US10605333B2
公开(公告)日：2020-03-31
申请号：US16035734
申请日：2018-07-16
Applicant: GE Avio S.r.l.
Inventor： Michele Gravina
Abstract: A transmission device to divide torque between gears. The device comprising a coaxial motion input member and transmission members and comprising shafts having gears at an axial end. Flanges which project radially outwards from the shafts, at the opposite axial end with respect to the gears, are axially facing and arranged abutting against each other, and are fixed to the motion input member to divide the torque transmitted by the motion input member between the flanges. The second shaft being axially hollow. The first shaft comprising a first intermediate portion having an outside diameter smaller than the inside diameter of the second shaft and housed at least with radial clearance in the second shaft. The flanges comprise respective portions configured to deform under the action of forces acting between the motion input member and the gears to enable a fluctuation of the shafts with respect to an axis.
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公开(公告)号：US09103413B2
公开(公告)日：2015-08-11
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
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。
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公开(公告)号：US11668372B2
公开(公告)日：2023-06-06
申请号：US17020262
申请日：2020-09-14
Applicant: GE Avio S.r.l.
Inventor： Juraj Hrubec , Michele Gravina , Leonardo Coviello
CPC classification number: F16H1/48 , F02C7/36 , F16H57/082
Abstract: An apparatus and method for reducing planet gear misalignment of planet gears mounted on a planet-carrier in an epicyclic gearing. The apparatus and method of the present disclosure specifically provide for a stiffness-reducing feature, a pillar, and a side-plate, each with a respective stiffness. In several embodiments, the feature stiffness is less than the pillar stiffness which is at least 10% less than the side-plate stiffness. The stiffness-reducing feature and the pillar may make up a pylon which has an axis. The pylon axis may form an angle with the side plate which is less than 90° and greater than 20°.
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公开(公告)号：US11643972B2
公开(公告)日：2023-05-09
申请号：US17347347
申请日：2021-06-14
Applicant: GE Avio S.r.l.
Inventor： Juraj Hrubec , Michele Gravina , Andrea Piazza
CPC classification number: F02C7/36 , F02C7/06 , F05D2240/54 , F05D2260/40311 , F05D2260/98
Abstract: A gear assembly for use with a turbomachine comprises a sun gear, a plurality of planet gear layshafts that each support a first stage planet gear and a second stage planet gear, and a ring gear. The sun gear is configured to rotate about a longitudinal centerline of the gear assembly, and the plurality of planet gear layshafts have a tubular shape.
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公开(公告)号：US20190113127A1
公开(公告)日：2019-04-18
申请号：US16163985
申请日：2018-10-18
Applicant: GE AVIO S.R.L
Inventor： Michele Gravina
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.
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