公开(公告)号：US11840765B2

公开(公告)日：2023-12-12

申请号：US17509362

申请日：2021-10-25

Applicant: GE Avio S.r.l.

Inventor： Lorenzo Rigo ,  Andrea Piazza ,  Diana Di Gioia

IPC: C23C8/38 ,  C21D1/06 ,  C23C8/34 ,  C21D9/32 ,  C23C8/02 ,  C22C38/44 ,  C22C38/52

CPC classification number: C23C8/38 ,  C21D1/06 ,  C21D9/32 ,  C23C8/02 ,  C23C8/34 ,  C22C38/44 ,  C22C38/52

Abstract: Methods for treating steel, along with the resulting treated steel, are provided. The method may comprise: nitriding a carburized Ferrium steel component such that the Ferrium steel component has a surface portion with a nitrogen content that is greater than 0% to about 5% by weight. Nitriding the Ferrium steel component may increase the surface hardness of the Ferrium steel. The surface portion may have a nitrogen content of about 0.05% to about 0.5% by weight.

公开(公告)号：US20230243309A1

公开(公告)日：2023-08-03

申请号：US17929542

申请日：2022-09-02

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

Inventor： Andrea Piazza ,  Jeffrey D. Clements

IPC: F02C7/36 ,  F02K3/06 ,  F02C3/067

CPC classification number: F02C7/36 ,  F02K3/06 ,  F02C3/067 ,  F05D2200/14 ,  F05D2260/98 ,  F05D2200/221 ,  F05D2260/40311 ,  F05D2200/13

Abstract: A turbomachine engine can include a fan assembly, a vane assembly, a core engine, a gearbox, and an overall engine efficiency rating. The fan assembly can include a plurality of fan blades. The vane assembly can include a plurality of vanes, and the vanes can, in some instances, be disposed aft of the fan blades. The core engine can include a low-pressure turbine. The gearbox includes an input and an output. The input of the gearbox is coupled to the low-pressure turbine of the core engine and comprises a first rotational speed, the output of the gearbox is coupled to the fan assembly and has a second rotational speed, and a gear ratio of the first rotational speed to the second rotational speed is within a range of 3.2-4.0. The overall engine efficiency rating is within a range of 0.57-8.0.

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

IPC: F02C7/36 ,  F02C7/06

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.

公开(公告)号：US11639688B1

公开(公告)日：2023-05-02

申请号：US17658134

申请日：2022-04-06

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

Inventor： Bugra H. Ertas ,  Ravindra Shankar Ganiger ,  Andrea Piazza

IPC: F02C7/36 ,  F16H57/00 ,  F16H57/023 ,  F01D25/04

Abstract: A planetary gear system includes a sun gear, a plurality of planet gears connected to a carrier and engaging with the sun gear, and a ring gear assembly including a damper housing, and a ring gear connected to the damper housing and engaging with the plurality of planet gears. The ring gear includes a geared wall having a plurality of gear teeth engaging with the plurality of planet gears, and a damper housing attachment member radially spaced outward of the geared wall and attaching the ring gear to the damper housing. A first end of the geared wall and the damper housing engage each other via a plurality of squeeze film damping members, and a second end of the geared wall is connected to the damper housing attachment member via a flexible damping wall that is configured to provide a radial damping of the second end of the geared wall.

公开(公告)号：US20230073996A1

公开(公告)日：2023-03-09

申请号：US18046612

申请日：2022-10-14

Applicant: GE Avio S.r.l.

Inventor： Pietro Molesini ,  Andrea Piazza ,  Fabio De Bellis

IPC: F02C7/36 ,  F01D17/16 ,  F02C7/06

Abstract: A turbomachine engine can include a fan assembly, a pitch change mechanism, a vane assembly, a core engine, a gearbox, and a gearbox efficiency rating. The fan assembly can include a plurality of fan blades. The pitch change mechanism can be coupled to the fan assembly. The vane assembly can include a plurality of vanes. The core engine can include one or more compressor sections and one or more turbine sections. The gearbox includes an input and an output. The input is coupled to the one or more turbine sections of the core engine and comprises a first rotational speed, the output is coupled to the fan assembly and has a second rotational speed, and a gear ratio of the first rotational speed to the second rotational speed is within a range of 4.1-14.0. The gearbox efficiency rating is 0.10-1.8.

公开(公告)号：US11486312B2

公开(公告)日：2022-11-01

申请号：US17364687

申请日：2021-06-30

Applicant: GE Avio S.r.l.

Inventor： Pietro Molesini ,  Andrea Piazza ,  Fabio De Bellis

IPC: F02C7/36 ,  F01D7/00 ,  F01D17/16 ,  F02C7/06 ,  F01D25/18

Abstract: A turbomachine engine can include an unducted fan assembly, an unducted vane assembly, a core engine, a gearbox, and a gearbox efficiency rating. The unducted fan assembly can include a plurality of fan blades. The unducted vane assembly can include a plurality of vanes, and the vanes can, in some instances, be disposed aft of the fan blades. The core engine can include one or more compressor sections and one or more turbine sections. The gearbox includes an input and an output. The input is coupled to the one or more turbine sections of the core engine and comprises a first rotational speed, the output is coupled to the unducted fan assembly and has a second rotational speed, and a gear ratio of the first rotational speed to the second rotational speed is within a range of 4.1-14.0. The gearbox efficiency rating is 0.10-1.8.

公开(公告)号：US11162167B2

公开(公告)日：2021-11-02

申请号：US16210078

申请日：2018-12-05

Applicant: GE AVIO S.R.L.

Inventor： Lorenzo Rigo ,  Andrea Piazza ,  Diana Di Gioia

IPC: C23C8/38 ,  C21D1/06 ,  C23C8/34 ,  C21D9/32 ,  C23C8/02 ,  C22C38/44 ,  C22C38/52

Abstract: Methods for treating steel, along with the resulting treated steel, are provided. The method may comprise: nitriding a carburized Ferrium steel component such that the Ferrium steel component has a surface portion with a nitrogen content that is greater than 0% to about 5% by weight. Nitriding the Ferrium steel component may increase the surface hardness of the Ferrium steel. The surface portion may have a nitrogen content of about 0.05% to about 0.5% by weight.