公开(公告)号：US20190168419A1

公开(公告)日：2019-06-06

申请号：US16240092

申请日：2019-01-04

Applicant: SAFRAN NACELLES

Inventor： Benjamin PROVOST ,  Bertrand DESJOYEAUX ,  Sébastien LOUCHARD ,  Fabien DEPEUX

IPC: B29B11/16 ,  B32B1/08 ,  B32B5/12 ,  B29C70/30 ,  B64D29/00 ,  B64F5/10

Abstract: A method for manufacturing a preform has a non-developable end shape having, about a longitudinal axis (A), an end overall radius of curvature (R2), and, in at least a longitudinal section, curved segments forming bending radii linking straight segments. The method includes a step of depositing successive layers giving the preform an initial substantially rotational shape having, about the longitudinal axis (A), an initial overall radius of curvature, then a step of deploying the preform by increasing the initial overall radius of curvature until the end overall radius of curvature is reached (R2), in order to close the bending radii of the curved segments.

公开(公告)号：US20190106817A1

公开(公告)日：2019-04-11

申请号：US16212738

申请日：2018-12-07

Applicant: Safran Nacelles

Inventor： Julien LORRILLARD ,  Bertrand DESJOYEAUX ,  Michel ROGNANT ,  Benjamin PROVOST

IPC: D03D25/00 ,  B29B11/16 ,  D03D1/00 ,  D03D49/20 ,  D03D13/00 ,  D03D11/02

Abstract: The disclosure relates to a method of manufacturing a preform including a core and a sole. The method includes contour weaving the preform on a lap roller having a groove or an outgrowth allowing shape weaving of the core and the sole of the preform. At least one portion of the core and at least one portion of the sole include weft yarns which cross each other on common warp yarns.

公开(公告)号：US20180166058A1

公开(公告)日：2018-06-14

申请号：US15878431

申请日：2018-01-24

Applicant: Safran Nacelles

Inventor： Arnaud DELEHOUZE ,  Sylvain SENTIS ,  Bertrand DESJOYEAUX

IPC: G10K11/168 ,  B32B3/12 ,  B32B18/00 ,  C25D11/24 ,  C04B38/06 ,  C04B35/71

CPC classification number: G10K11/168 ,  B32B3/06 ,  B32B3/12 ,  B32B3/26 ,  B32B3/266 ,  B32B5/02 ,  B32B9/005 ,  B32B9/041 ,  B32B15/14 ,  B32B15/20 ,  B32B18/00 ,  B32B37/14 ,  B32B2250/40 ,  B32B2255/20 ,  B32B2260/021 ,  B32B2260/04 ,  B32B2262/10 ,  B32B2262/105 ,  B32B2307/102 ,  B32B2605/18 ,  B32B2607/00 ,  C04B35/638 ,  C04B35/71 ,  C04B35/803 ,  C04B37/005 ,  C04B38/06 ,  C04B2235/522 ,  C04B2235/616 ,  C04B2237/064 ,  C04B2237/34 ,  C04B2237/343 ,  C04B2237/38 ,  C04B2237/597 ,  C04B2237/62 ,  C04B2237/76 ,  C04B2237/80 ,  C25D11/246 ,  F02C7/045 ,  F02K1/827 ,  F05D2250/283 ,  F05D2300/6033 ,  G10K11/172 ,  Y02T50/672

Abstract: The present disclosure relates to a method for producing an acoustic attenuation panel having two outer skins made from a composite material with a ceramic matrix containing a fibrous reinforcement. The skins are assembled on each side of a central honeycomb core having walls forming acoustic cavities produced by at least partial electrochemical conversion of aluminum into aluminum oxide. The method includes inserting a fugitive filler material into the acoustic cavities, leaving an annular space free in each cavity, on each side against the skin, extending around the cavity, and a step of sintering the composite material, in which the fugitive material is removed and the spaces around the cavities are filled with the composite material.

公开(公告)号：US20220230613A1

公开(公告)日：2022-07-21

申请号：US17716089

申请日：2022-04-08

Applicant: Safran Nacelles

Inventor： Marc VERSAEVEL ,  Bertrand DESJOYEAUX ,  Mathieu PREAU

IPC: G10K11/172 ,  B64D33/02

Abstract: An acoustic attenuation panel includes a perforated acoustic wall, a first honeycomb structure coupled to the perforated acoustic wall and including a plurality of acoustic cells defined by peripheral partitions, a second honeycomb structure including a plurality of acoustic cells defined by peripheral partitions, and a septum which includes a plurality of macro-perforations and is positioned between the first honeycomb structure and the second honeycomb structure. Each acoustic cell of the first honeycomb structure and each acoustic cell of the at least second honeycomb structure are arranged opposite a single perforation of the septum.

公开(公告)号：US20200291893A1

公开(公告)日：2020-09-17

申请号：US16785117

申请日：2020-02-07

Applicant: SAFRAN ,  Safran Nacelles

Inventor： Géraldine OLIVEUX ,  Bertrand DESJOYEAUX ,  Cedric THOMAS

IPC: F02K1/72 ,  F02K1/54

Abstract: A thrust reverser cascade for an aircraft nacelle includes a plurality of blades having a first and a second surface, the blades being connected to members connected to attachment flanges for attaching the thrust reverser cascade to the nacelle. At least one of the surfaces of the blades is covered with at least one layer of fibers, each layer including a plurality of fiber pieces which are pre-impregnated with resin. The fiber pieces are superimposed on one another, positioned parallel to the aerodynamic surface of the blade and oriented in different directions.

公开(公告)号：US20180148381A1

公开(公告)日：2018-05-31

申请号：US15878443

申请日：2018-01-24

Applicant: Safran Nacelles

Inventor： Arnaud DELEHOUZE ,  Sylvain SENTIS ,  Bertrand DESJOYEAUX

IPC: C04B35/80 ,  C04B38/00 ,  F02C7/045 ,  G10K11/162 ,  C04B35/117

CPC classification number: C04B35/803 ,  C04B30/02 ,  C04B35/117 ,  C04B35/18 ,  C04B35/80 ,  C04B38/00 ,  C04B2111/52 ,  C04B2235/5224 ,  C04B2235/5228 ,  C04B2235/5252 ,  C04B2235/5256 ,  C04B2235/616 ,  F02C7/045 ,  F02C7/24 ,  F05D2300/6032 ,  F05D2300/6034 ,  G10K11/162 ,  Y02T50/672 ,  C04B38/0003

Abstract: The present disclosure concerns a porous body made of a ceramic-matrix composite material for an acoustic attenuation panel and a method of manufacturing the porous body. The porous body includes a plurality of interwoven ceramic fibers, a metal oxide matrix, and a plurality of channels interwoven with the ceramic fibers and interconnected together. The channels define at least one cavity. In one form, at least one channel is wrapped around a ceramic fiber. In another form, at least one ceramic fiber and at least one channel are twisted together. In yet another form, at least one channel is wrapped around a ceramic fiber and twisted with the ceramic fiber. The present disclosure also concerns an acoustic attenuation panel including the porous body and an aircraft propulsion unit having such a panel.

公开(公告)号：US20220250767A1

公开(公告)日：2022-08-11

申请号：US17729541

申请日：2022-04-26

Applicant: Safran Nacelles

Inventor： Pierre CARUEL ,  Bertrand DESJOYEAUX ,  Bertrand LEROYER ,  Marc VERSAEVEL ,  Laurent Georges VALLEROY

IPC: B64F1/26

Abstract: An acoustic attenuation panel includes a cellular structure including a plurality of acoustic cells separated from one another by peripheral partitions, a perforated acoustic structure, the perforated acoustic structure and the cellular structure being formed in one piece in a first material, and a porous acoustic layer formed of a second material and fastened to a surface of the perforated acoustic structure by entangling the first material and the second material.

公开(公告)号：US20210380220A1

公开(公告)日：2021-12-09

申请号：US17412676

申请日：2021-08-26

Applicant: Safran Nacelles ,  SAFRAN CERAMICS

Inventor： Bertrand DESJOYEAUX ,  Davi SILVA DE VASCONCELLOS ,  François TAILLARD ,  Florent BOUILLON

IPC: B64C7/02 ,  B64D33/02 ,  B64D29/06 ,  F02C7/045 ,  F02K1/82

Abstract: A sandwich panel for an aircraft turbojet nacelle includes an outer skin in contact with an air flow, an inner skin opposed to the outer skin, and an intermediate system comprising partitions connecting the inner and outer skins so as to form cells, the inner skin of at least one cell having at least one corrugation configured to allow the materials making up the sandwich panel to deform in the event of thermal variation.

公开(公告)号：US20200339243A1

公开(公告)日：2020-10-29

申请号：US16921163

申请日：2020-07-06

Applicant: Safran Nacelles ,  Safran Ceramics

Inventor： Florent BOUILLON ,  Franck DUPE ,  Benoît CARRERE ,  Bertrand DESJOYEAUX

IPC: B64C7/02 ,  F02K1/34 ,  F02C7/045 ,  F02K1/82

Abstract: A structure for the nacelle of an aircraft propulsion unit includes a first skin and stiffeners arranged to hold acoustic treatment modules against the first skin. Each acoustic treatment module includes a honeycomb core and a second skin, such that the honeycomb core is sandwiched between the first skin and the second skin. Such a structure allows the structural reinforcement function provided by the stiffeners to be separated from the acoustic treatment function performed by the acoustic treatment modules which are simply bearing on the first skin.

公开(公告)号：US20200095954A1

公开(公告)日：2020-03-26

申请号：US16693551

申请日：2019-11-25

Applicant: Safran Nacelles

Inventor： Bertrand DESJOYEAUX ,  Benjamin PROVOST ,  Fabien DEPEUX ,  Davi SILVA DE VASCONCELLOS

IPC: F02K1/48 ,  B29C70/22 ,  D03D3/02 ,  D03D3/08

Abstract: A tubular structure having lobes is produced as a single piece over at least two lobes. Circumferential fibres of the structure have a constant orientation with respect to the longitudinal axis (A) of the structure in any plane (P) transverse to the longitudinal axis. The structure is obtained by weaving or by filament winding.