Assembly of a Blade and a Composite Carrier, Obtained by Sealing

Abstract

The invention relates to a mechanical assembly ( 1 ) for the field of aeronautics, including: a part ( 3 ) comprising an attachable end; a recess for receiving the part ( 3 ), said recess having a wall ( 2 ) comprising an organic matrix composite or OMC; and a sealing composite ( 4 ) including a thermoplastic or heat-curable material including 0 to 70 wt % of a filler and forming a mechanical and/or physicochemical link between the part ( 3 ) and the recess having the OMC wall ( 2 ).

1 . A mechanical assembly ( 1 ) in the aeronautics field comprising:
 a part ( 3 ) comprising an attachable end;   a recess with a wall comprising an organic matrix composite or OMC ( 2 ) for receiving the part ( 3 );   a sealing composite ( 4 ) comprising a thermoplastic or heat-sealable material with between 0 and 70 wt % of a filler, forming a mechanical and/or physicochemical connection between said part ( 3 ) and the recess with the OMC wall ( 2 ).   
     
     
         2 . The assembly as in  claim 1 , wherein said part ( 3 ) is a blade. 
     
     
         3 . The assembly as in  claim 1 , wherein said part ( 3 ) comprises one end whose geometry allows to optimize the mechanical and/or physicochemical connection. 
     
     
         4 . The assembly as in  claim 3 , wherein said part ( 3 ) comprises a foot geometry. 
     
     
         5 . The assembly as in  claim 1 , wherein the recess with the OMC wall ( 2 ) is a profiled carrier, preferably in the shape of a “U”. 
     
     
         6 . The assembly as in  claim 1 , wherein the organic matrix of the recess ( 2 ) is made of a thermoplastic or heat-sealable material. 
     
     
         7 . The assembly as in  claim 1 , wherein the material of the recess with the OMC wall ( 2 ) and that of the sealing composite ( 4 ) are identical or chemically compatible, so as to produce a chemical or physicochemical attachment between them. 
     
     
         8 . The assembly as in  claim 6 , wherein the recess with the heat-sealable or thermoplastic OMC wall ( 2 ) is produced by a method selected from the group consisting of compression molding, injection of thermoplastic or heat-sealable matrix, heat sealing and co-consolidation. 
     
     
         9 . The assembly as in  claim 1 , wherein the sealing composite ( 4 ) to be injected is produced by a method selected from the group consisting of injection of a thermoplastic or heat-sealable matrix with or without filler, and of compression molding. 
     
     
         10 . A rectifier stage for a turbomachine compressor comprising a mechanical assembly ( 1 ) of a plurality of blades ( 3 ) with a housing having an OMC wall ( 2 ) imparting structural rigidity to the assembly, as in any one of the preceding claims, the blades ( 3 ) each comprising a foot ( 3 A), said recess with an OMC wall ( 2 ) and said sealing composite ( 4 ) cooperating in order to seal the feet ( 3 A) of the blades ( 3 ) in the recess ( 2 ). 
     
     
         11 . The rectifier stage as in  claim 10 , wherein the mechanical assembly ( 1 ) has the form of a ring or of a sector attached to an outer shroud of the rectifier stage by means of mechanical fasteners. 
     
     
         12 . The rectifier stage as in  claim 11 , wherein the mechanical fasteners are lock bolts. 
     
     
         13 . The rectifier stage as in  claim 10 , wherein the blades ( 3 ) are made of metal or composite material. 
     
     
         14 . The rectifier stage as in  claim 13 , wherein the blades ( 3 ) are made of titanium or aluminum. 
     
     
         15 . A turbomachine compressor comprising one or more rectifier stages as in  claim 10 .