Aircraft wing comprising a mobile leading edge flap guided by a device located at the front of a wing box
An aircraft wing including a mobile leading edge flap associated with a guiding device arranged at the front of a front spar of a wing box, and including: —a pivoting member having one end connected to the spar by an articulated linkage; —a pivoting member connected to one end of the member by an articulated linkage, the end of this member being connected to the flap via an articulated linkage; —a guide rail receiving a tracking member supported by the member, the rail defining a path inscribed on the surface of an imaginary sphere, the centre of which corresponds to a point of convergence of the axes of the three linkages.
1. An aircraft wing ( 4 ) comprising a fixed wing centre body ( 8 ), as well as at least one mobile leading edge flap ( 16 ) for being moved relative to said fixed centre body between an extended position and a retracted position, the fixed wing centre body ( 8 ) comprising a front spar ( 32 ) delimiting a wing box ( 31 ) at the front of which said mobile flap is located, the latter being associated with at least one guiding device ( 40 ) for guiding it with respect to the fixed wing centre body ( 8 ),
wherein the guiding device ( 40 ) is totally arranged at the front of the front spar ( 32 ) of the wing box, this device including the following elements:
a first pivoting member ( 42 ) having a first end ( 42 a ) connected to the front spar ( 32 ) of the wing box through a first hinged connection ( 50 a );
a second pivoting member ( 44 ) connected to a second end ( 42 b ) of the first pivoting member ( 42 ) through a second hinged connection ( 50 b ) arranged between a first and a second end ( 44 a , 44 b ) of the second pivoting member, the first end ( 44 a ) of this second pivoting member being connected to a module ( 56 ) for connecting the mobile flap ( 16 ) through a third hinged connection ( 50 c ); and
a guiding rail ( 46 ) integral with the front spar ( 32 ) of the wing box, the guiding rail receiving a follower member ( 58 ) arranged at the second end ( 44 b ) of the second pivoting member ( 44 ), the guiding rail defining a trajectory ( 62 ) lying on the surface of a dummy sphere ( 64 ),
and wherein the hinging axes ( 54 , 54 b , 54 c ) of the three hinged connections converge to a same point ( 66 ) corresponding to the centre of the dummy sphere ( 64 ).
2. The wing according to claim 1 , wherein the first and second pivoting members ( 42 , 44 ) are arms.
3. The wing according to claim 1 , wherein the second hinged connection ( 50 b ) is arranged at a median zone ( 44 c ) of the second pivoting member ( 44 ).
4. The wing according to claim 1 , wherein the first hinged connection ( 50 a ) is made using one or more hinges ( 52 ).
5. The wing according to claim 1 , wherein the follower member ( 58 ) is a roller system carried by the second end ( 44 b ) of the second pivoting member ( 44 ).
6. The wing according to claim 1 , wherein the guiding rail ( 46 ) and the first hinged connection ( 50 c ) are spaced apart from each other along a span direction ( 17 ) of the wing.
7. The wing according to claim 1 , wherein the trajectory ( 62 ) defined by the guiding rail ( 46 ) requires a movement of the third hinged connection ( 50 c ) in a movement plane ( 68 ) parallel to a chord direction ( 70 ) of the wing, and wherein the motion of the flap relative to the wing fixed centre body is a rotation along a rotational axis ( 18 ) of the flap passing through the point of convergence ( 66 ) of the hinging axes ( 54 , 54 b , 54 c ) of the three hinged connections.
8. The wing according to claim 1 , wherein the trajectory ( 62 ) defined by the guiding rail ( 46 ) requires a movement of the third hinged connection ( 50 c ) in a movement plane ( 72 ) parallel to a flight direction ( 3 ).
9. The wing according to claim 1 , further including, being associated with said mobile leading edge flap ( 16 ), at least one device ( 80 ) for moving the mobile flap, the moving device being mounted to the wing fixed centre body ( 8 ).
10. The wing according to claim 9 , wherein the moving device ( 80 ) has an outlet ( 84 ) mounted to the mobile leading edge flap ( 16 ), or has an outlet ( 84 ) mounted to the first pivoting member ( 42 ), or to the second pivoting member ( 44 ) of the guiding device ( 40 ).
11. The wing according to claim 9 , wherein the moving device ( 80 ) is a cylinder.
12. The wing according to claim 9 , wherein the moving device ( 80 ) is totally arranged at the front of the front spar ( 32 ) of the wing box ( 31 ).
13. The wing according to claim 9 , wherein it includes being associated with said mobile leading edge flap ( 16 ), several moving devices ( 80 ) as well as several guiding devices ( 40 ).
14. The wing according to claim 12 , wherein the moving device ( 80 ) is fastened to the front spar ( 32 ).