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公开(公告)号:US10906841B2
公开(公告)日:2021-02-02
申请号:US15878443
申请日:2018-01-24
申请人: Safran Nacelles
IPC分类号: B32B3/10 , C04B35/80 , C04B35/117 , C04B38/00 , F02C7/045 , C04B35/18 , F02C7/24 , C04B30/02 , G10K11/162 , C04B111/52 , B32B19/04
摘要: 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.
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公开(公告)号:US10022923B2
公开(公告)日:2018-07-17
申请号:US15585426
申请日:2017-05-03
申请人: SAFRAN NACELLES
IPC分类号: B23P6/00 , B23P19/04 , B29C73/00 , B29C65/00 , B29C51/16 , B29C45/00 , B29C47/00 , B32B43/00 , B32B37/00 , B32B38/04 , B32B7/14 , B32B3/10 , E04B1/82 , B29C73/10 , B29C73/32 , B29C70/44 , B29C70/74 , B29L31/30 , B32B3/12 , B29C65/48 , B32B3/26 , B29C65/50 , G10K11/172 , B29C65/76 , B32B37/14
摘要: The present disclosure relates to a method of repairing a damaged portion of a perforated skin of a panel using a doubler made of composite material which is designed to be applied to the damaged portion of the perforated skin. The method includes at least one step in which a sealing film is applied to the damaged portion of the perforated skin in order to temporarily seal the perforations in the skin, and a step in which the doubler is produced over the previously deposited sealing film.
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公开(公告)号:US10995038B2
公开(公告)日:2021-05-04
申请号:US15878432
申请日:2018-01-24
申请人: Safran Nacelles
IPC分类号: C04B35/64 , C04B35/80 , F02K1/82 , G10K11/162 , F02C7/045 , B32B18/00 , C04B37/00 , C04B35/628 , C04B35/71 , C04B35/74 , C04B35/76 , C04B35/84
摘要: A method for producing an acoustic attenuation panel from a composite material with a ceramic oxide matrix is provided that includes draping a plurality of plies having fibrous reinforcements including fibers of ceramic material in a mold to define a first skin, depositing blocks made of fugitive material on the first skin such that a space between two blocks is defined, and draping a second plurality of plies on a surface formed by the blocks such that a second skin is defined. Rounded corners of the blocks define radii for connecting the first and second skins with walls of a honeycomb core of the acoustic panel. The method further includes using a liquid medium to infiltrate the skins and spaces with a precursor of a ceramic phase, removing the liquid medium by evaporation or polymerization, and sintering to consolidate the ceramic oxide material and removal the fugitive material.
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公开(公告)号:US10415472B2
公开(公告)日:2019-09-17
申请号:US15459014
申请日:2017-03-15
申请人: SAFRAN NACELLES
摘要: A device for fastening a downstream end of an air inlet on a fan casing of an aircraft turbojet engine nacelle is provided. The device includes an acoustic shroud, a first flange coupled to the fan casing, a second L-shaped flange having a base coupled to the acoustic shroud, and a collar linked to the first flange. The acoustic shroud extends from an upstream segment to a downstream segment which defines an inner skin and an outer skin that encloses an acoustic panel. The collar further includes a protrusion that extends from the outer skin to the downstream segment.
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