公开(公告)号：US20210390940A1

公开(公告)日：2021-12-16

申请号：US17460933

申请日：2021-08-30

Applicant: Safran Nacelles

Inventor： Bertrand DESJOYEAUX ,  Marc VERSAEVEL ,  Mathieu PREAU ,  Laurent MOREAU

IPC: G10K11/168 ,  B29D24/00 ,  B32B3/12 ,  B32B27/40 ,  B32B27/12 ,  B32B5/02 ,  B32B3/26

Abstract: A method for manufacturing a sound attenuating panel uses an alveolar-core structure including a first edge and a second edge separated by alveolar cells, the alveolar cells including walls extending from the first and second edges and defining a primary conduit for the circulation of a sound wave that is to be attenuated. The method includes covering the first edge or the second edge of the alveolar-core structure with a compartmentation wall; deforming the compartmentation wall to define at least one secondary conduit for the circulation of a sound wave that is to be attenuated, the secondary conduit extending at least partially within said primary conduit; and creating an opening in the compartmentation wall to permit communication between the primary and secondary conduits.

公开(公告)号：US20240367355A1

公开(公告)日：2024-11-07

申请号：US18412753

申请日：2024-01-15

Applicant: Safran Nacelles

Inventor： Mathieu PREAU ,  Bertrand DESJOYEAUX ,  Franck MAZE ,  Mickaël SOREL

IPC: B29C43/50 ,  B29C43/02 ,  B29C43/36 ,  B29C70/46 ,  B29K105/08 ,  B29K307/04 ,  B29L31/30

Abstract: Tooling for manufacturing an air deflection cascade for a thrust reverser system of an aircraft nacelle includes a plurality of spars, each spar being connected to at least one adjacent spar by a plurality of deflection vanes. The tooling includes at least one molding bar and at least one molding column of a row of vanes, comprising two opposing lateral faces extending along the longitudinal direction of the tooling, and comprising molding cavities. The tooling includes a fixed structure on which the molding bar and the molding column are mounted. The fixed structure enabling a translational movement, along a transverse direction of the tooling, of the molding bar. The tooling includes a compression device to provide the compression of elements made of a composite material arranged in the tooling and intended to form at least one part of the cascade to be manufactured.

公开(公告)号：US20210102513A1

公开(公告)日：2021-04-08

申请号：US17103424

申请日：2020-11-24

Applicant: Safran Nacelles

Inventor： Loïc Hervé André LE BOULICAUT ,  Christophe THOREL ,  Simon VERGER ,  Mathieu PREAU

IPC: F02K1/82 ,  B64C7/02 ,  F02K1/34 ,  F02C7/24

Abstract: The present disclosure concerns an acoustic attenuation panel for an aircraft turbojet engine nacelle and a method for manufacturing this panel. The acoustic attenuation panel includes an alveolar central core interposed between an acoustic front skin comprising perforations and a rear skin, the acoustic attenuation panel including a front structure and a rear structure. The front structure includes the acoustic front skin and a first network of alveolar walls, the rear structure including the rear skin and a second network of alveolar walls, the first and second networks of alveolar walls being complementary so as to form, in an assembled position, the alveolar central core, the front structure and the rear structure being positioned opposite to each other and so that the network of alveolar walls of a structure is spaced from the skin of the other structure facing it by a clearance d.

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：US20210129462A1

公开(公告)日：2021-05-06

申请号：US17145903

申请日：2021-01-11

Applicant: Safran Nacelles

Inventor： Clément ROLLAND ,  Jean Baptiste DELARUE ,  Jean Jacques THOMAS ,  Vianney HUS ,  Mathieu PREAU ,  Alain ROUSSEL

IPC: B29C70/54 ,  B32B3/12 ,  B29C70/48

Abstract: The present disclosure concerns a method for manufacturing a composite panel including a cellular central core interposed between two skins. The manufacturing method includes the steps of manufacture of an element with a cellular structure comprising a cellular core structure interposed between two layers of structural plies intended to form the skins, positioning of the element with a cellular structure within a mold, formation of drains on either side of the cellular core structure, infusion of the element with a cellular structure so as to impregnate it with a resin, carrying out a draining of the resin through the drains in the element with a cellular structure during the infusion step, the drains having a geometry configured to provide draining, and polymerization of the impregnated element with a cellular structure to form the composite panel.