Blade of a wind turbine

1. A blade of a wind turbine, comprising:

a cylindrical connection part;

a connection means, provided at one end of the cylindrical connection part, for connection of the cylindrical connection part to a shaft/hub of a wind turbine,

the cylindrical connection part having a wind-energy-absorbing profile which is optimized for wind flow and extends from another end of the connection part;

the connection part being provided with a member that is designed in such a way that an assembly comprising the member and the connection part can absorb wind energy;

said member comprising a rib that projects from the cylindrical connection part;

said rib being arranged in a plane that forms an angle, which on the pressure side lies between 45° and 135° to the chordal plane of said wind-energy-absorbing profile.

2. The blade according to claim 1 , in which said rib is fitted in a plane that forms an angle of approximately 90° to the chordal plane of said wind-energy-absorbing profile.

3. The blade according to claim 1 , in which said connection part comprises a substantially circular cross section and said rib projects from the cross section.

4. The blade according to claim 1 , wherein said connection part comprises a transition from a circular to an aerodynamic profile.

5. The blade according to claim 1 , wherein the height of the rib lies between 0.05 and 0.3 times the diameter or thickness of the connection part.

6. The blade according to claim 1 , wherein the connection part is provided with vortex-producing generators.

7. The blade according to claim 1 , designed as a flexible part.

8. The blade of claim 1 , wherein the rib extends spirally from the cylindrical connection part.

9. The blade of claim 1 , wherein, the cylindrical connection part comprises a tube.

10. The blade of claim 1 , wherein, the cylindrical connection part comprises a tube, and the rib projects from the tube.

11. The blade of claim 10 , further comprising: vortex generators fitted on the tube.

12. The blade of claim 11 , wherein, the vortex generators extend perpendicular to a plane of the tube.

13. The blade of claim 12 , wherein the vortex generators extend at an angle of 15° relative to a plane perpendicular to a longitudinal axis of the blade.

14. The blade of claim 1 , wherein the rib extends from the cylindrical connection part and from the wind-energy-absorbing profile.

15. Method for producing a blade of a wind turbine, comprising:

providing a blade comprising a cylindrical connection part provided at one end with connection means for connection to a shaft/hub of a wind turbine, and a wind-energy-absorbing profile at another end;

providing a rib on the cylindrical connection part in such a way that an assembly comprising the rib and the cylindrical connection part can generate wind energy;

said rib being arranged in a plane which on the pressure side lies between 45° and 135° to the chordal plane of the wind-energy-absorbing profile.

16. A blade of a wind turbine, comprising:

a connection part provided at one end with a connection means for connection to a shaft/hub of a wind turbine, and a wind-energy-absorbing profile which is optimized for wind flow and extends from another end of the connection part;

the connection part being provided with a member that is designed in such a way that an assembly comprising the member and the connection part can absorb wind energy;

said member comprising a rib that projects from the connection part;

said rib being arranged in a plane that forms an angle, which on the pressure side lies between 45° and 135° to the chordal plane of said wind-energy-absorbing profile,

wherein the height of the rib lies between 0.05 and 0.3 times the diameter or thickness of the connection part.