Wind turbine rotor with vertical rotation axis
A wind turbine rotor with a vertical rotation axis connected to a hub having at least two horizontal supports, on the ends of which are tightly fixed blades, each consisting of two wings joined together, with a symmetrical or concavo-convex airfoil with the airfoil's chord lengths and thickness diminishing toward both wing ends. The rotor blade's upper and lower wings are radially deflected from the central zone outwards. The chord length of both wing ends and the chord length in the central zone are approximately inversely proportional to the radii of its location in relation to the axis of the rotor's rotation. The deflecting angle of the lower wing can be greater than the deflecting angle of the upper wing or the length of the lower wing can be greater than the length of the upper wing. These specifications provide uniform wind power consumption along the wing's length, increasing the efficiency of a wind turbine and its service life.
1. A wind turbine rotor with a vertical rotation axis having connected to a hub, at least two horizontal supports, on the ends of which, are rotor blades fixed tightly in their central zone to the support's ends, each rotor blade consisting of two wings joined together each with a cord length and airfoil thickness, whose traverse sections have a symmetrical or concavo-convex airfoil, wherein the length of the chord and the thickness of the airfoil diminishes towards the wings' ends, characterized by the fact that an upper wing ( 3 a ) and a lower wing ( 3 b ) of the rotor blade ( 3 ) radially deflect from the central zone ( 3 c ) outwards, forming a deflecting angle (β 1 , β 2 ) towards the axis of rotation of the rotor, where the length of the chord (b 2 ) of the airfoil at both wing ends ( 3 a , 3 b ) and the length of the chord (b 1 ) in the central zone ( 3 c ) are approximately inversely proportional to a radii (R 1 , R 2 ) of their location in relation to the axis of rotation of the rotor; and
wherein the deflecting angle of the lower wing is greater than the deflecting angle of the upper wing.
2. The rotor according to claim 1 , wherein the deflecting angle of the lower wing is greater than by 1° to 5° than the deflecting angle of the upper wing.
3. The rotor according to the claim 1 , wherein the length (l 1 ) of the lower wing ( 3 b ) is greater than the length (l 2 ) of the upper wing ( 3 a ).
4. The rotor according to the claim 1 , wherein the length (l 1 ) of the lower wing( 3 b ) is greater than the length (l 2 ) of the upper wing ( 3 a ).
5. The rotor according to claim 3 , wherein the length of the lower wing is greater by 2 to 15% than the length of the upper wing.
6. The rotor according to claim 4 , wherein the length of the lower wing is greater by 2 to 15% than the length of the upper wing.