Trailing-edge girder with rectangular cross section
The invention relates to a rotor blade of a wind power plant having two rotor blade half-shells (1, 21) with in each case a leading-edge periphery and a trailing-edge periphery (8 a, 22 a ), which rotor blade half-shells are adhesively fastened to each other along the leading-edge and trailing-edge peripheries (8 a, 22) and which in case have a trailing-edge girder (3, 25), and each of the trailing-edge girders (3, 25) at least in certain sections is of rectangular design in a cross section along its longitudinal extent.
1. Rotor blade of a wind power plant having two rotor blade half-shells ( 1 , 21 ) with in each case a leading-edge periphery and a trailing-edge periphery ( 8 a , 22 a ), which are adhesively fastened to each other along the leading-edge and trailing-edge peripheries ( 8 a , 22 ) and which have in case at least one trailing-edge girder ( 3 , 25 ), characterised in that at least one of the trailing-edge girders ( 3 , 25 ) at least along one section in a longitudinal direction (L) has a rectangular cross section transversely to said longitudinal direction (L) the two trailing edge-girders ( 3 , 25 ) are adhesively fastened to the inner side of the two rotor blade half shells ( 1 , 21 ) and are interconnected by means of a stringer ( 50 ) via adhesive connections and the trailing-edge girder ( 3 , 25 ), in the section in which the trailing-edge girder ( 3 , 25 ) is of rectangular shape in cross section, is at a greater distance from the trailing-edge periphery ( 8 a , 22 a ) associated with it than in other sections.
2. Rotor blade according to claim 1 , characterised in that two trailing-edge girders ( 3 , 25 ) are oppositely disposed and each of the trailing-edge girders ( 3 , 25 ) in a longitudinal direction (L) has a rectangular cross section transversely to said longitudinal direction (L).
3. Rotor blade according to claim 1 , characterised in that in the section a trailing edge ( 7 ) of the rotor blade ( 20 ) has at most a first thickness and along the section the trailing-edge girder ( 3 , 25 ) is overall at a greater distance from the trailing-edge peripheries ( 8 a , 22 a ) than in another section in which the rotor blade ( 20 ) has a greater thickness than the first thickness.
4. Rotor blade according to claim 1 , characterised in that each of the trailing-edge girders ( 3 , 25 ) is at such a distance from the trailing-edge peripheries ( 8 a , 22 a ) associated with them that a minimum distance between the two rotor blade half-shells ( 1 , 21 ) in the region in which the trailing-edge girders ( 3 , 25 ) are located is at least 3 mm.
5. Rotor blade according to claim 1 , characterised in that a greatest distance between the two rotor blade half-shells ( 1 , 21 ) in the region in which the trailing-edge girders ( 3 , 25 ) are located is at most 5-6 cm.
6. Rotor blade according to claim 1 , characterised in that a stringer ( 50 ), extending along the longitudinal extent of the two trailing-edge girders ( 3 , 25 ), is arranged at least in certain sections between oppositely disposed trailing-edge girders ( 3 , 25 ).
7. Rotor blade according to claim 1 , characterised in that each of the two trailing-edge girders ( 3 , 25 ) has a width (B) of 20 cm to 40 cm.
8. Rotor blade according to claim 1 , characterised in that each of the two trailing-edge girders ( 3 , 25 ) has a height of 1 mm to 80 mm.
9. Rotor blade according to claim 1 , characterised in that a greatest distance of each of the two trailing-edge girders ( 3 , 25 ) from the trailing-edge periphery ( 8 a , 22 a ) is at most 20 cm to 60 cm.
10. Rotor blade according to claim 7 , characterised in that each of the two trailing-edge girders ( 3 , 25 ) has a width (B) of 20 cm-30 cm.
11. Rotor blade according to claim 9 , characterised in that a greatest distance of each of the two trailing-edge girders ( 3 , 25 ) from the trailing-edge periphery ( 8 a , 22 a ) is at most 30 cm-45 cm.
12. Method for producing a rotor blade, by two rotor blade half-shells being produced and along trailing-edge peripheries ( 8 a , 22 a ) of both rotor blade half-shells ( 1 , 21 ) by a trailing-edge girder ( 3 , 25 ) being laid in each case, by layers ( 31 ) of constant width being positioned one on top of the other by their longitudinal edges and then by a resin system being infused into the layers ( 31 ) and the two trailing-edge girders ( 3 , 25 ) are adhesively fastened to the inner side of the two rotor blade half shells ( 1 , 21 ) and are interconnected by means of a stringer ( 50 ) via adhesive connections.
13. Method for producing a rotor blade according to claim 12 , characterised in that the trailing-edge girders ( 3 , 25 ) are produced separately from the rotor blade half-shells ( 1 , 21 ) and are then adhesively fastened to each other.
14. Method for producing a rotor blade according to claim 12 , characterised in that the trailing-edge girders ( 3 , 25 ) are produced separately from the rotor blade half-shells ( 1 , 21 ) and are then integrated during the construction of the rotor blade half-shells ( 1 , 21 ).