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.

Description

BRIEF DESCRIPTION OF THE DRAWING

Other characteristics and advantages of the present invention appear from the following description made with reference to the accompanying drawings that show an embodiment having no limiting character. In the figures:

FIG. 1 is a section view of a variable-pitch vane of the invention; and

FIG. 2 is a fragmentary section view of a variable-pitch vane in a variant embodiment of the invention.

Claims

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.