Turbojet casing and turbojet receiving such casings

Abstract

A turbojet casing adapted to receive a plurality of vanes, the casing including attachment means ( 21, 30 ) for attaching one end of each vane to the casing, the casing being characterized in that the attachment means extend on a face of the casing facing away from the vanes, the casing including orifices ( 26 ) for passing the ends of the vanes so that they can co-operate with the attachment means of the casing. A turbojet including such a casing.

1 . A turbojet casing adapted to receive a plurality of vanes, the casing including attachment means ( 21 ,  30 ) for attaching one end of each vane to the casing, the casing being characterized in that the attachment means extend on a face of the casing facing away from the vanes, the casing including orifices ( 26 ) for passing the ends of the vanes so that they can co-operate with the attachment means of the casing. 
     
     
         2 . A casing according to  claim 1 , wherein the attachment means comprise an annular member ( 21 ,  30 ) extending around the casing. 
     
     
         3 . A casing according to  claim 2 , wherein the annular member comprises at least one peripheral rail ( 21 ) having the ends ( 24 ) of fastener elements ( 23 ) for fastening to the ends of the vanes inserted therein. 
     
     
         4 . A casing according to  claim 2 , wherein the annular member comprises a peripheral angle bar ( 30 ) to which the ends of the vanes are fastened directly. 
     
     
         5 . A casing according to  claim 2 , the casing being made of long fibers associated with a thermoplastic resin, while the annular member ( 21 ,  30 ) is obtained by pultrusion and impregnated with a thermoplastic resin that is heat-sealable with the thermoplastic resin of the casing, the assembly being joined together by hot compaction. 
     
     
         6 . A turbojet including at least one casing according to  claim 1 , and a plurality of vanes, each having one end connected to the casing. 
     
     
         7 . A turbojet according to  claim 6 , wherein each of the vanes comprises:
 an elongate one-piece front portion ( 2 ) cut from a pultruded section member having fibers bonded by the resin and forming a leading edge;   an elongate one-piece rear portion ( 3 ) cut from a pultruded section member having fibers bonded by the resin and forming a trailing edge;   a core-forming central portion ( 4 ) extending between the leading edge ( 2 ) and the trailing edge ( 3 ); and   a skin ( 5 ) cut from a fiber fabric impregnated with resin and extending to cover the side faces of the core ( 4 ) and covering at least zones ( 6 ,  7 ) of the leading edge ( 2 ) and of the trailing edge ( 3 ) that are contiguous with the central portion ( 4 );   at least one of the leading edge ( 2 ) and the trailing edge ( 3 ) presenting extensions ( 10 ,  11 ,  12 ,  13 ) that project from the core ( 4 ) at least from one end of the vane ( 1 ) in order to carry attachment means ( 14 ,  15 ,  16 ,  17 ) for attaching the vane ( 1 ) and co-operating with the attachment means of the casing ( 20 ) of the turbojet.   
     
     
         8 . A turbojet including at least one casing according to  claim 1 , and a plurality of vanes, each having one end connected to the casing.