Device for moving at least one moveable element in a gas turbine

1. An apparatus ( 17 ) for a gas turbine comprising:

a pivotably arranged annular member ( 18 );

a plurality of moveable elements ( 19 ) spaced in a circumferential direction about the annular member ( 18 ) and a device ( 20 ) for moving each moveable element ( 19 ) between a first and a second position by pivoting the annular member ( 18 ), wherein said device ( 20 ) comprises a linkage ( 21 ) connecting the pivotably arranged annular member ( 18 ) with said moveable elements ( 19 ); and

said linkage ( 21 ) comprises a link member ( 22 ) connected to the moveable element ( 19 ) via a first articulation joint ( 23 ) and the device ( 20 ) comprises a support member ( 24 ), which supports the link member at a distance from the first articulation joint ( 23 ).

2. The apparatus as recited in claim 1 , wherein the link member ( 22 ) is slidingly supported by a support surface ( 34 , 35 ) of the support member ( 24 ).

3. The apparatus as recited in claim 1 , wherein the support member ( 24 ) comprises two substantially flat, parallel parts ( 32 , 33 ) that define two opposed support surfaces ( 34 , 35 ) for receiving and slidingly supporting the link member ( 22 ) therebetween.

4. The apparatus as recited in claim 3 , wherein the flat parallel parts ( 32 , 33 ) extend from the base portion ( 29 ) on opposite sides of the through-hole ( 31 ).

5. The apparatus as recited in claim 1 , wherein the support member ( 24 ) comprises a base portion ( 29 ) with a through-hole ( 31 ) for receiving the link member ( 22 ).

6. The apparatus as recited in claim 1 , wherein the device further comprises means ( 25 ) for releasably securing the support member ( 24 ) to a stationary casing ( 15 ).

7. The apparatus as recited in claim 1 , wherein the link member ( 22 ) extends between the first articulation joint ( 23 ) and a second articulation joint ( 26 ) adapted to be connected to the annular member ( 18 ).

8. The apparatus as recited in claim 7 , wherein a support surface ( 27 , 28 ) of the link member ( 22 ) is positioned between the first articulation joint ( 23 ) and the second articulation joint ( 26 ).

9. The apparatus as recited in claim 7 , wherein the link member ( 22 ) is connected to the support member ( 24 ) by a third articulation joint ( 36 ) positioned between the first articulation joint ( 23 ) and the second articulation joint ( 26 ).

10. The apparatus as recited in claim 9 , wherein the third articulation joint ( 36 ) forms a fulcrum point.

11. The apparatus as recited in claim 9 , wherein the link member ( 22 ) extends between the first, second, and third articulation joints ( 23 , 26 , 36 ), such that pivoting of the annular member ( 18 ) causes the first articulation joint ( 23 ) to move a distance in a direction in parallel with a pivot axis of the annular member ( 18 ).

12. The apparatus as recited in claim 9 , wherein the link member ( 22 ) comprises at least one projecting portion ( 27 , 28 ) adapted for glidingly contacting a support surface ( 34 , 35 ) of the support member ( 24 ) and that the projecting portion ( 27 , 28 ) is located at a distance from the third articulation joint ( 36 ).

13. The apparatus as recited in claim 1 , wherein the moveable element ( 19 ) is adapted to be arranged in different inclined positions in the first and second position.

14. The apparatus as recited in claim 1 , wherein the moveable element ( 19 ) is pivoted around an axis between the first and second position.

15. The apparatus as recited in claim 1 , wherein the moveable element ( 19 ) is adapted for opening and closing an opening in a wall defining a gas duct ( 6 ) in a gas turbine for bleeding gas.

16. The apparatus as recited in claim 1 , further comprising a casing ( 15 ) and said annular member ( 18 ) being suspended from the casing ( 15 ) by the plurality of linkages spaced about the circumferential direction of the annular member.

17. The apparatus as recited in claim 1 , further comprising a casing ( 15 ) and said support member ( 24 ) being rigidly secured to the casing.

18. The apparatus as recited in claim 1 , further comprising an actuator ( 39 ) connected to the annular member ( 18 ) for pivoting the member between a first and second position in its circumferential direction, which correspond to the first and second position of the moveable element ( 19 ).

19. The apparatus as recited in claim 1 , wherein said apparatus ( 17 ) is incorporated into a gas turbine engine.

20. The apparatus as recited in claim 1 , wherein said apparatus ( 17 ) is incorporated into an aircraft engine.

21. An apparatus for a gas turbine comprising:

a pivotably arranged annular member ( 18 );

a plurality of moveable elements ( 19 ) spaced in a circumferential direction of the annular member ( 18 ); and

a device ( 20 ) for moving each moveable element ( 19 ) between a first and a second position by pivoting the annular member ( 18 ), wherein the device comprises a linkage ( 21 ) connecting the pivotably arranged annular member with said moveable elements ( 19 ); and

said annular member ( 18 ) is suspended from a casing ( 15 ) via the plurality of linkages spaced in the circumferential direction of the annular member.

22. The apparatus as recited in claim 21 , wherein the linkage ( 21 ) comprises a link member ( 22 ) connected to the moveable element ( 19 ) via a first articulation joint ( 23 ) and the device comprises a support member ( 24 ) supporting the link member at a distance from the first articulation joint.