METHOD FOR MANUFACTURING A TURBINE-ENGINE FAN CASING HAVING AN ACOUSTIC COATING

The invention relates to a method for manufacturing a turbine-engine fan casing having, on the inner surface thereof, an abradable coating (12) and an acoustic coating (20) arranged downstream and/or upstream from the abradable coating. The casing is made of a composite material. A fibrous structure...

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Bibliographische Detailangaben
Hauptverfasser:	CAMUS, ERWAN, LE BORGNE, BENEDICTE, MARIE, SCHNEIDER, JULIEN
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS ENGINE PLANTS IN GENERAL GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS STEAM ENGINES TRANSPORTING WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	The invention relates to a method for manufacturing a turbine-engine fan casing having, on the inner surface thereof, an abradable coating (12) and an acoustic coating (20) arranged downstream and/or upstream from the abradable coating. The casing is made of a composite material. A fibrous structure (41), which is to constitute the fibrous reinforcement of an inner skin of an acoustic coating, said skin being made of a composite material, is deposited onto a molding element (30), then the fibrous preform (50) constituting the fibrous reinforcement of the casing is molded on the molding element. The fibrous preform and the fibrous structure are subjected to a resin-polymerizing heat treatment, and a plurality of perforations are formed in the inner skin of the acoustic coating, such that an assembly that includes the casing having a built-in acoustic coating is produced. L'invention concerne un procédé de fabrication d'un carter de soufflante de turbomachine muni sur sa face interne d'un revêtement abradable (12) et de revêtement acoustique (20) disposé à l'aval et/ou à l'amont du revêtement abradable. Le carter est en matériau composite. Une structure fibreuse (41) destinée à constituer le renfort fibreux d'une peau interne en matériau composite de revêtement acoustique est déposée sur un élément d'outillage (30) puis la préforme fibreuse (50) constituant le renfort fibreux du carter est mise en forme sur l'élément d'outillage. La préforme fibreuse et la structure fibreuse sont soumises à un traitement thermique de polymérisation de résine, et la peau interne du revêtement acoustique est multiperforée de sorte qu'un ensemble est obtenu comprenant le carter avec revêtement acoustique intégré.