Adjustable guide vane for a turbomachine

1. An adjustable guide vane for a turbomachine, comprising

a vane element and a turning disk, wherein the turning disk has a first impact chamber, in which an impulse element is arranged with play of movement,

wherein the first impact chamber is arranged on an arc, in the turning disk, around the axis of rotation of the guide vane and turning disk, and

wherein the impulse element is configured and arranged to dampen vibrations in the turning disk and the guide vane.

2. The adjustable guide vane according to claim 1 , wherein the turning disk has at least one second impact chamber, which is in alignment with the first impact chamber in a first matrix direction and in which an impulse element is arranged with play of movement, and at least one third impact chamber, which is in alignment with the first impact chamber in a second matrix direction that is different from the first matrix direction and in which an impulse element is arranged with play of movement.

3. The adjustable guide vane according to claim 2 , wherein the first impact chamber, the second impact chamber, and the third impact chamber are arranged on the arc around the axis of rotation of the guide vane.

4. The adjustable guide vane according to claim 1 , wherein the first impact chamber has mutually opposite-lying walls in at least a first impact direction and a second impact direction, which enclose with each other an angle of at least 30° and at most 150° and/or, respectively, enclose with the axis of rotation of the guide vane an angle of at least 75° and at most 105°, with the distance between the mutually opposite-lying walls in the first impact direction and the distance between the mutually opposite-lying walls in the second impact direction differing by at most 10%.

5. The adjustable guide vane according to claim 4 , wherein at least one of the walls encloses with the axis of rotation of the guide vane an angle of at most 15°.

6. The adjustable guide vane according to claim 4 , wherein at least one of the walls is planar.

7. The adjustable guide vane according to claim 1 , wherein the first impact chamber has at least a circular or polygonal, in particular rectangular, pentagonal, or hexagonal, cross section.

8. The adjustable guide vane according to claim 1 , wherein the weight of the impulse element arranged in the first impact chamber is at least 0.01 g and at most 0.075 g.

9. The adjustable guide vane according to claim 1 , wherein the density of the impulse element arranged in the first impact chamber is at most 80% of the density of the vane element.

10. The adjustable guide vane according to claim 1 , wherein the impulse element arranged in the first impact chamber is spherical and/or comprises ceramics.

11. The adjustable guide vane according to claim 1 , wherein the first impact chamber is manufactured by material removal by erosion and/or electrochemical machining and/or, after arrangement of the impulse element, is closed in a cohesively bonded manner by welding, soldering, and/or adhesive bonding.

12. The adjustable guide vane according to claim 1 , wherein the first impact chamber is arranged in an outer annular portion of the turning disk.

13. The adjustable guide vane according to claim 1 , wherein at least one adjustable guide vane is rotatably mounted around the axis of rotation of the guide vane on a bearing fixed to the turbomachine casing in a turbomachine.

14. The adjustable guide vane according to claim 13 , wherein the turning disk is accommodated in a recess fixed on the turbomachine casing.

15. The adjustable guide vane according to claim 1 , wherein the first impact chamber is manufactured by material removal by erosion and/or electrochemical machining, and/or, after arrangement in the impulse element, is closed in a cohesively bonded manner by welding, soldering, and/or adhesive bonding.