Wind turbine with deformable aerofoil blades - has aerofoil blades mounted vertically with leading edge automatically positioned cam deforming aerofoil section to reduce losses

摘要

The aerofoils are mounted vertically between two horizontal discs fixed to the vertical output shaft. The aerofoils have a rigid leading wedge which is fixed to a bar mounted by two short arms to lie parallel to the aerofoil pivot rod and free to rotate about the pivot rod. An electric motor driven worm gear drives a pinion which rotates the leading edge bar to face the wind under control of a wind positioned vane and its electric contacts, positioned above each aerofoil. To reduce the retarding torque while the aerofoil travels against the wind the flexible aerofoil tail section is positioned by a lever operated by a cam which is stationary beside the turbine. The lever rotates the pivot shaft (8) and internal linkages fixed to the pivot shaft and to the tail of the aerofoil bend the aerofoil to the required profile.