Assembly comprised of a vane and of a cooling liner, turbomachine nozzle guide vanes assembly comprising this assembly, turbomachine and method of fitting and of repairing this assembly
An assembly includes a vane and a cooling liner for cooling the vane, the vane having a central cavity with at least one first opening into which the liner extends, the liner having a flange fixed to the rim of the opening. This assembly includes, near the flange, a peripheral insert inserted between the wall of the liner and the wall of the opening.
1. An assembly comprising:
a vane;
a cooling liner for cooling the vane, the vane comprising a central cavity with at least one first opening into which the liner extends, the liner comprising a flange fixed to the rim of the opening, and
near the flange but not in contact with said flange, a peripheral insert inserted between the wall of the liner and the wall of the opening,
wherein the insert comprises a peripheral strip forming a baffle.
2. The assembly as claimed in claim 1 , wherein the insert creates a pressure drop.
3. The assembly as claimed in claim 1 , wherein, with the central cavity forming a second opening, the liner comprises an end portion at the opposite end to the flange, said end portion being guided in the second opening, the wall of which forms a guideway.
4. The assembly as claimed in claim 3 , wherein a clearance is present between the liner and the wall of the first opening.
5. The assembly as claimed in claim 1 , wherein the insert comprises an elastic leaf.
6. The assembly as claimed in claim 1 , wherein the insert comprises a peripheral spring.
7. The assembly as claimed in claim 1 , wherein the flange is spot welded to the rim so that said flange is fixed to said rim only at a number of points.
8. A turbomachine nozzle guide vanes assembly comprising a plurality of assemblies comprised of a vane and of a liner as claimed in claim 1 .
9. A turbomachine comprising a nozzle guide vanes assembly as claimed in claim 8 .
10. The assembly as claimed in claim 1 , wherein said liner defines a plurality of cooling holes, and wherein said insert is located between said plurality and said flange such that no cooling hole is present between said insert and said flange.
11. A method for repairing an assembly including a vane and a cooling liner for cooling the vane, the vane comprising a central cavity with at least one first opening into which the liner extends, the liner comprising a flange fixed to the rim of the opening, said method comprising:
grinding the flange of the liner down as far as the rim without grinding away the insert,
removing the liner from the central body of the vane, via the first opening,
attaching a new flange to the liner,
inserting the liner, with the new flange, in the cavity of the vane, via the first opening, so as to position the peripheral insert between the wall of the liner and the wall of the first opening, and
fixing the flange to the rim.
12. An assembly comprising:
a vane;
a cooling liner for cooling the vane, the vane comprising a central cavity with at least one first opening into which the liner extends, the liner comprising a flange fixed to the rim of the opening, and
near the flange but not in contact with said flange, a peripheral insert inserted between the wall of the liner and the wall of the opening,
wherein said insert extends radially with respect to an axis of said liner over a distance that is shorter than a distance separating said liner from said wall of the opening.