Horizontal-shaft wind turbine with rotating cylinder at front edge of paddle

Abstract

The invention relates to a horizontal-shaft wind turbine with a rotating cylinder at the front edge of a paddle, which comprises a tower rack, a horizontal-shaft case, paddles and a hub or an air shield, wherein the tower rack is straightly arranged, the horizontal-shaft case is arranged at the top end of the tower rack, and the paddles and a hub or an air shield are arranged at the front end of the case. The front edge of each paddle is provided with a controllable cylinder which can forwardly or reversely rotate in the mode of winding the self axis, and the rotating cylinder and the paddle are in revolution together with a rotor in the case. The invention obtains the purpose of effectively using the wind power through regulating the rotating speed and the rotating direction of the rotating cylinder, controlling the flowing separation of air flow on the paddles and increasing the lift-drag ratio of the paddles of the wind turbine.

Description

technical field [0001] The invention relates to a wind power machine, in particular to a horizontal axis wind power machine with a rotating cylinder at the leading edge of the blade, which can improve the utilization rate of wind energy of the wind power machine. technical background [0002] At present, the airfoils of horizontal axis wind turbines are mainly selected from aviation airfoils. In order to improve the efficiency of the blades in absorbing wind energy, airfoils with a high lift-to-drag ratio are generally used, and the blades are twisted along the height. When the speed of the wind turbine is constant, as the wind speed increases, the angle of attack of the airflow on the blade also increases, until the airflow separates on the surface of the blade, the blade stalls, the wind energy absorption rate drops sharply, and the output power also rapidly reduce. Wind turbines generally have a set of control systems to adjust the output power and speed. The manufacturi...

AI Technical Summary

Problems solved by technology

Under the limitation of a certain speed of the wind rotor, the fixed-pitch wind turbine is more likely to stall with the increase of the incoming wind speed

After the airfoil of the wind turbine is selected, when the wind speed is constant, the maximum lift-to-drag ratio of the airfoil of the fixed-pitch wind turbine is also limited, and it cannot capture as much wind energy as possible.

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