Anti-wear device for a guide pivot of a variable-pitch vane of a turbomachine compressor

Abstract

The invention relates to a variable-pitch vane for a turbomachine compressor, the vane including a bushing mounted to rotate about a guide pivot of the vane for mounting in a casing of the turbomachine, the pivoting contact between the bushing and the guide pivot being of the nickel-graphite and titanium type.

1 . A variable-pitch vane for a turbomachine compressor, the vane including a bushing mounted to pivot about a guide pivot of the vane and for mounting in a casing of the turbomachine, wherein the pivoting contact between the bushing and the guide pivot is of the nickel-graphite and titanium type. 
   
   
       2 . A vane according to  claim 1 , in which the guide pivot is made of a titanium-based material, wherein the bushing is constituted by a material based on nickel and on graphite. 
   
   
       3 . A vane according to  claim 2 , in which the bushing is obtained by sintering a powder based on nickel and on graphite in a mold. 
   
   
       4 . A vane according to  claim 1 , in which the guide pivot is not constituted by a titanium-based metallic material, wherein said guide pivot is covered by a deposit of nickel-graphite, and the bushing is constituted by a titanium-based material. 
   
   
       5 . A vane according to  claim 1 , in which the guide pivot is not constituted by a titanium-based metallic material, the vane further including a metal ferrule covered in a deposit of nickel-graphite and heat-shrunk on the guide pivot, the bushing being constituted by a titanium-based material. 
   
   
       6 . A vane according to  claim 1 , in which the guide pivot is not constituted by a titanium-based metallic material, the vane further including a ferrule constituted by a material based on nickel and on graphite, and heat-shrunk onto the guide pivot, the bushing being constituted by a titanium-based material. 
   
   
       7 . A vane according to  claim 6 , wherein the ferrule is obtained by sintering a powder based on nickel and on graphite in a mold. 
   
   
       8 . A vane according to  claim 4 , wherein the nickel-graphite is deposited by thermally spraying a powder based on nickel and on graphite. 
   
   
       9 . A turbomachine compressor, including a plurality of variable-pitch vanes according to  claim 1 . 
   
   
       10 . A turbomachine, including a plurality of variable-pitch vanes according to  claim 1 .