Rotor blade of a wind energy unit
View Patent ↗The invention relates to a rotor blade ( 60 ) of a wind energy plant with a top side (suction side) and a bottom side (pressure side) wherein profiles ( 21, 22, 23, 24, 25 ) with a front edge and a back edge ( 62 ) in cross-section are designed along a longitudinal axis between a rotor blade root and a rotor blade tip, one designed-based direction of air inflow ( 31, 32, 33, 34, 35 ) is predetermined for each profile ( 21, 22, 23, 24, 25 ) and the profiles ( 21, 22, 23, 24, 25 ) in the outer area facing the rotor blade tip are designed with a relative thickness of less than 30%. The rotor blade ( 60 ) is characterized in that an attached device ( 51 ), which has an attached-device inflow surface as well as a start point ( 41, 42, 43 ) facing the front edge of the attached-device inflow surface ( 52 ) and an end point facing the back edge ( 62 ) of the attached-device inflow surface ( 52 ), is arranged along the longitudinal axis in the inner area dedicated to the rotor blade root to profiles ( 21, 22, 23, 24, 25 ) with a relative thickness of more than 30% on the pressure side.
1. Rotor blade ( 60 ) of a wind energy plant with a top side (suction side) and a bottom side (pressure side), comprising:
profiles ( 21 , 22 , 23 , 24 , 25 ) with a front edge and a back edge ( 62 ) in cross-section designed along a longitudinal axis between a rotor blade root and a rotor blade tip,
wherein one designed-based direction of air inflow ( 31 , 32 , 33 , 34 , 35 ) is predetermined for each profile ( 21 , 22 , 23 , 24 , 25 ) and the profiles in an outer area facing the rotor blade tip are designed with a relative thickness of less than 30%,
wherein an attached device ( 51 ), which has an attached-device inflow surface ( 52 ) and a start point ( 41 , 42 , 43 ) facing the front edge of the attached-device inflow surface ( 52 ) and an end point facing the back edge ( 62 ), is arranged along the longitudinal axis in an inner area assigned to the rotor blade root to profiles ( 21 , 22 , 23 ) with a relative thickness of more than 30% on the pressure side,
wherein the start point ( 41 , 42 , 43 ) of the attached-device inflow surface ( 52 ) is arranged in an area between the front edge and the back edge ( 62 ) of the profiles ( 21 , 22 , 23 , 24 , 25 ) so that a tangent to the profile ( 21 , 22 , 23 , 24 , 25 ) in the start point ( 41 , 42 , 43 ) is designed in an angle area between +20° and −20° for the designed-based direction of air inflow ( 31 , 32 , 33 , 34 , 35 ) of the profile ( 21 , 22 , 23 , 24 , 25 ) and wherein the end point of the attached-device inflow surface ( 52 ) ends in front of the back edge ( 62 ).
2. Rotor blade ( 60 ) according to claim 1 wherein an attached device ( 51 ), which has an attached-device inflow surface ( 52 ) and a start point facing the front edge of the attached-device inflow surface ( 52 ) and an end point facing the back edge ( 62 ), is arranged along the longitudinal axis in the inner area assigned to the rotor blade root to profiles ( 21 , 22 , 23 , 24 , 25 ) with a relative thickness of more than 30% on the pressure side, wherein the start point of the attached device inflow surface ( 52 ) is designed in front of a break-off point of a medium flowing over the rotor blade ( 60 ) on the pressure side.
3. Rotor blade ( 60 ) according to claim 1 , wherein the tangent in the start point ( 41 , 42 , 43 ) is designed mainly parallel to a designed-based direction of air inflow ( 31 , 32 , 33 , 34 , 35 ).
4. Rotor blade ( 60 ) according to claim 1 , wherein start points ( 53 ) of the attached-device in-flow surface ( 52 ) are connected continuously from inside to outside.
5. Rotor blade ( 60 ) according to claim 1 , wherein end points ( 54 ) of the attached-device inflow surface ( 52 ) are connected continuously from inside to outside.
6. Rotor blade ( 60 ) according to claim 1 , wherein a separation distance of end points ( 54 ) of the attached-device inflow surface ( 52 ) increases from the front edge of the rotor blade ( 60 ) along the longitudinal axis from in-side to outside.
7. Rotor blade ( 60 ) according to claim 1 , wherein the attached device ( 51 ) is designed as a spoiler ( 51 ).
8. Rotor blade ( 60 ) according to claim 1 , wherein the attached device ( 51 ) will be or is glued to the rotor blade ( 60 ).
9. Rotor blade ( 60 ) according to claim 1 , wherein the attached device ( 51 ) is retrofittable or retrofitted.
10. Rotor blade ( 60 ) according to claim 1 , wherein the attached device ( 51 ) will be or is brought from an idle position to a working position.
11. Rotor blade ( 60 ) according to claim 1 , wherein the end point of the attached-device inflow surface ( 52 ) is designed as a flow break-off point.
12. Wind energy plant with at least one rotor blade ( 60 ) according to claim 1 .
13. Use of an attached device ( 51 ), which will be or is arranged in an inner area of a rotor blade ( 60 ) according to claim 1 .
14. Method for the production of a rotor blade ( 60 ) of a wind energy plant, wherein an attached device ( 51 ) is arranged in the inner area of the rotor blade ( 60 ) so that the rotor blade ( 60 ) is designed according to claim 1 .