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1.发明授权公开(公告)号：US11427299B2
公开(公告)日：2022-08-30
申请号：US16800211
申请日：2020-02-25
申请人： Safran Nacelles , Safran Ceramics
摘要： The present disclosure relates to a cell structure for an acoustic attenuation device for a nacelle of an aircraft propulsion assembly. This cell structure includes lateral partitions forming channels that each extend between a first end and a second end and skin elements arranged so that each channel is at least partly closed at the first end thereof by at least one skin element. Each skin element is connected to a respective lateral partition and can move relative to the other lateral partitions. A continuous skin can be assembled on this cell structure so as to at least partly close the channels at the second end thereof and to thus form an acoustic attenuation device.
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公开(公告)号：US09995699B2
公开(公告)日：2018-06-12
申请号：US15589049
申请日：2017-05-08
申请人： SAFRAN NACELLES
CPC分类号： G01N25/02 , B64F5/60 , G01N25/4866
摘要： The present disclosure relates to a method of characterizing the thermal ageing of a part made of composite material, in particular a composite material having an organic matrix. The method includes taking from the part a sample of composite material, subjecting the sample to modulated temperature differential calorimetry, determining, from the curve representing the total heat flow component associated with irreversible phenomena, the temperature at which a local extremum appears, this local extremum being characteristic of the thermal ageing, and determining the thermal ageing of the composite material by comparing the temperature at which the local extremum appears with a reference chart.
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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：US10479049B2
公开(公告)日：2019-11-19
申请号：US15974714
申请日：2018-05-09
申请人： Safran Nacelles
IPC分类号： B32B7/04 , B32B7/08 , B29C70/54 , B32B7/02 , B32B27/06 , B29C64/165 , B32B1/00 , B32B27/12 , B29C65/56 , B29K307/04 , B29L31/00 , B29L31/30
摘要： The present disclosure relates to a part made from composite material that includes a base and a T-shaped reinforcement. The T-shaped reinforcement includes a first L-shaped element having a first right-angled connection portion and a second L-shaped element having a second right-angled connection portion. The part further includes a plurality of needles, each connecting the base to the T-shaped reinforcement of the part, close to the connection portions and extending in multiple directions so as to oppose, in particular, the separation of the base from the T-shaped reinforcement.
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6.发明申请公开(公告)号：US20180230063A1
公开(公告)日：2018-08-16
申请号：US15878432
申请日：2018-01-24
申请人： Safran Nacelles
IPC分类号： C04B35/80 , C04B35/628 , C04B35/64 , G10K11/162 , F02K1/82
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：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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