TWO-ROTOR WIND-DRIVEN ELECTRIC PLANT (VERSIONS) Russian patent published in 2016 - IPC F03D1/02 F03D7/02 F03D11/00 F03D9/00 

FIELD: electricity.

SUBSTANCE: each of two rotor wind-driven electric plants includes installed in a tower a wind turbine with two coaxial rotors on a rotating platform, a transmission, a system to control blades setting angles and platform position, an electric generator. Wherein each rotor of the wind turbine has the number of blades over 3, they are designed as rotating wings, the total front surface of the blades in a rated working mode is 0.3÷0.5 of the blade-swept area. The blades in a bushing are installed on journal bearings, in which grease is used based on metal dichalcogenides in combination with a ceramic bushing. The electric generator with the vertical axis of rotation of the rotor is located in the top part of the fixed tower, the generator stator is secured to the tower, the axis of rotation of the electric generator is located vertically and coincides with the axis of rotation of the rotating platform. The drive from the wind turbine to the generator is made using the cone gearing. The multiplying gear is a two-circuit gear train located in the same casing, each circuit transmits movement and torque from one rotor of the wind turbine independently from another circuit movement, and the kinematic diagram of the circuit is a planetary gear and tooth one-stage gear. A three-shaft coaxial gearbox is installed between the multiplying gear and rotor of the electric generator, its kinematic diagram is made as per conditions Δω₁=K·Δω₂, where Δω₁ is the change of the angular speed on an input internal shaft; Δω₂ is the change of the angular speed on an input external shaft; K is a permanent coefficient depending on the kinematic diagram of the gearbox circuit; the number of blades of the wind turbine is selected as per the condition: the number of blades of one rotor is Z, the number of blades of another rotor is (Z+1). On the external shaft of the wind turbine an elongation insert is made, at its end a front bearing of the internal shaft is installed. The algorithm of control of the blades rotating angles of one rotor β₁=f(υ), i.e. the angle of blades setting is the function of the wind speed only, and another rotor n_gen=const, β₂=υar, i.e. the generator speed of rotation is maintained permanent due to the change of the setting angles of another rotor blades, where β₁ is the setting angle of one rotor; υ is the wind speed; n_gen is electric generator rpm; β₂ is the setting angle of another rotor; υar is a variable value.

EFFECT: expansion of the range of two-rotor wind-driven electric plants.

9 cl, 12 dwg, 3 tbl