Wind turbine having external gluing flanges near flat back panel
A wind turbine with a wind turbine tower, a nacelle on the tower, a rotor hub rotatably mounted to the nacelle, and at least one wind turbine blade having a blade root mounted to the rotor hub, a tip end, a pressure side and a suction side connected to each other via a leading edge and a trailing edge, a first shell part having inner and outer surfaces and a second shell part having inner and outer surfaces, the shell parts having flanges that extend outwards from the trailing edge of the shell parts and away from the outer surface with gluing surfaces which are glued together when the two shell parts are placed on top of each other. This allows the glue line to be moved out of the inner area defined by the shell parts so that the glue process can be controlled more effectively.
1. A wind turbine ( 1 ) comprising:
a wind turbine tower ( 2 );
a nacelle ( 3 ) provided on the wind turbine tower ( 2 );
a rotor hub ( 4 ) rotatably mounted to the nacelle ( 3 );
one or more wind turbine blades ( 5 , 21 ) having a tip end ( 9 ) and a blade root ( 8 ), where the wind turbine blade ( 5 , 21 ) further comprises a pressure side ( 10 ) and a suction side ( 11 ) connected to each other via a leading edge ( 12 ) and a trailing edge ( 13 ), wherein the wind turbine blade ( 5 , 21 ) comprises a first shell part ( 14 , 26 ) having an inner surface and an outer surface and a second shell part ( 15 , 27 ) having an inner surface and an outer surface, where the first shell part ( 14 , 26 ) comprises a first flange ( 17 ) having a first gluing surface, and the second shell part ( 15 , 27 ) comprises a second flange having a second gluing surface facing the first gluing surface, and where the two gluing surfaces are configured to be glued together using a glue when the two shell parts ( 14 , 15 , 26 , 27 ) are placed on top of each other, wherein:
the first flange ( 17 ) is arranged at the trailing edge ( 13 ) of the first shell part ( 14 , 26 ) and extends outwards and away from the outer surface of the first shell part ( 14 , 26 ), and
a second flange ( 18 ) is arranged at the trailing edge ( 13 ) of the second shell part ( 15 , 27 ) and extends outwards and away from the outer surface of the second shell part ( 15 , 27 ), wherein the two flanges ( 17 , 18 ) form two substantially parallel gluing surfaces and a flap configured to enhance the aerodynamic properties of the wind turbine blade ( 5 , 21 ), and
wherein the first shell part comprises a flat back panel ( 20 , 25 ) connected to each of the first flange ( 17 ) and the first shell part ( 14 , 21 ).
2. A wind turbine according to claim 1 , wherein the flat back panel ( 25 ) is configured as a flange having a radii curved outer surface curving inwards towards the leading edge ( 12 ).
3. A wind turbine according to claim 1 , wherein the flat back panel ( 20 ) is configured as a flange having a radii curved outer surface curving outwards away from the leading edge ( 12 ).
4. A wind turbine according to claim 1 , wherein the first flange ( 17 ) is placed in an angle of 90° or more relative to the tangent of one of the outer surface, the inner surface of the first shell part ( 14 , 26 ) and the flat back panel ( 20 , 25 ).
5. A wind turbine according to claim 4 , wherein the flat back panel ( 20 , 25 ) is placed in an angle of 90° or more relative to the tangent of the outer surface or inner surface of the first shell part ( 14 , 26 ).
6. A wind turbine according to claim 1 , wherein the second flange ( 18 ) is placed in an angle of 90° or more relative to a tangent of the outer surface of the second shell part ( 15 , 27 ).
7. A wind turbine according to claim 1 , wherein the flanges are connected by a glue.
8. A wind turbine according to claim 1 , wherein a third gluing surface and a fourth gluing surface are arranged at or near the leading edge ( 12 ) on the first and second shell parts ( 14 , 15 , 26 , 27 ) respectively.
9. A wind turbine according to claim 1 , wherein the first and second flanges ( 17 , 18 ) have a width of 2-10% relative to a chord of the wind turbine blade ( 5 , 21 ).
10. A wind turbine according to claim 1 , wherein the first and second flanges have a width of 5% relative to a chord of the wind turbine blade.