Sector of a compressor guide vanes assembly or a sector of a turbomachine nozzle assembly
A sector of a compressor guide vanes assembly or a sector of a turbomachine nozzle assembly. It comprises an inner ring sector ( 4 ), an outer ring sector ( 6 ) and a multitude of blades ( 8 ) connecting the inner ring sector ( 4 ) to the outer ring sector ( 6 ). The outer ring sector ( 6 ) or the inner ring sector ( 4 ) comprises radial cuts ( 10 ) situated between two consecutive blades ( 8 ) in such a way as to split them into the same number of elementary sectors as there are blades. Housings ( 14 ) are provided, secant to the radial cuts ( 10 ), damping inserts ( 16 ) being positioned in said housings.
1. A sector of a compressor guide vanes assembly or a sector of a turbomachine nozzle assembly, comprising:
an inner ring sector;
an outer ring sector; and
a multitude of blades connecting the inner ring sector to the outer ring sector,
wherein at least one of the outer ring sector and the inner ring sector includes radial cuts between consecutive blades such that there are a same number of elementary sectors as there are blades,
wherein housings are disposed secant to the radial cuts, and
wherein damping inserts are positioned in said housings, the inserts including at least one viscoelastic layer, each viscoelastic layer being sandwiched between two metal layers.
2. The sector as claimed in claim 1 , wherein the damping inserts are fitted into said housings such that the damping inserts are free.
3. The sector as claimed in claim 1 , wherein the damping inserts are fitted into said housings such that the damping inserts are preloaded.
4. The sector as claimed in claim 1 , wherein the housings are perpendicular to the radial cuts.
5. The sector as claimed in claim 2 , wherein the damping inserts have an H-shaped geometry.
6. The sector as claimed in claim 2 , wherein the inserts have an X-shaped geometry.
7. The sector as claimed in claim 3 , wherein the damping inserts have a hairpin-shaped geometry.
8. The sector as claimed in claim 3 , wherein the damping inserts have a wavy geometry.
9. The sector as claimed in claim 3 , wherein the damping inserts have a U-shaped geometry.
10. The sector as claimed in claim 3 , wherein the damping inserts have a Z-shaped geometry.
11. The sector as claimed in claim 3 , wherein the damping inserts have an S-shaped geometry.
12. A turbomachine compressor comprising:
at least one sector as claimed in claim 1 .
13. A turbomachine turbine comprising:
at least one sector as claimed in claim 1 .
14. A turbomachine comprising:
a compressor as claimed in claim 12 .
15. The sector as claimed in claim 2 , wherein the housings are perpendicular to the radial cuts.
16. The sector as claimed in claim 3 , wherein the housings are perpendicular to the radial cuts.
17. A turbomachine comprising:
a turbine as claimed in claim 13 .
18. The sector as claimed in claim 1 , wherein the damping inserts are axially immobilized.