WIND TURBINE WITH TWO COUNTER-ROTATING ROTORS Russian patent published in 2023 - IPC F03D3/02 

FIELD: wind power engineering.

SUBSTANCE: wind turbine with two counter-rotating rotors on the same axis comprises a housing (13), in the centres of the upper and lower planes of which thrust bearings (9) are installed, in which external (5) and internal (6) shafts are installed, connected to drive mechanisms. The movable blades (1, 2, 3, 4) are either aerodynamic or flat. The inner shaft (6) of the upper rotor is located inside the shaft (5) of the lower rotor, which is shorter than the inner shaft (6). The movable blades (1 and 4) of the lower rotor are fixed to hinges (10) mounted on the bracket (7) of the outer shaft (5). The movable blades (2 and 3) of the upper rotor are mounted on hinges (10) mounted on the bracket (8) attached to the open part of the inner shaft (6). The movement of the movable blades (1-4) is limited by the stops (11) and (12) located on the brackets (7, 8), so that the blades moving towards the flow are deflected in the direction of the wind flow to rotate the upper and lower rotors in opposite directions without collision of movable blades (1-4).

EFFECT: increased efficiency of using the air flow as well as a reduced size of the wind turbine.

4 cl, 5 dwg