Blade of vertical axis wind turbine

Abstract

The invention relates to a blade of a vertical axis wind turbine, which comprises a blade housing unit, a blade supporting unit and a blade wind catching unit, wherein the blade wind catching unit is fixedly connected with the blade supporting unit and the blade housing unit; with the help of a plurality of wind catching ports of the wind catching unit, wind can enter into a cavity of the blade from a plurality of wind catching ports under the action of the wind, thereby leading the wind to be simultaneously acted on the outer surface of the wind catching unit and on the inner surface of the wind catching unit and further increasing the wind sweeping area of the blade; furthermore, when in existence of the transverse sweeping wind, the wind carries out the turbulent motion on the blade, thereby further increasing the rotational speed of the blade, improving the energy conversion efficiency of a wind turbine and improving the efficiency of the wind turbine under the premise of not changing the original external shape of the blade.

Description

technical field [0001] The invention relates to a blade of a wind power generator, in particular to a blade of a vertical axis wind power generator. Background technique [0002] Wind power generation is an energy conversion device that converts wind energy into mechanical energy, electrical energy or thermal energy. Wind power generation was originally an environmentally friendly power generation device developed to solve emergency power supply and power supply in remote areas. However, with the rapid development of science and technology Development and population growth have brought energy crisis to the world, so countries all over the world are developing wind power as a supplementary energy source. [0003] However, the initial wind turbines had high requirements for starting wind speed and high power generation noise, so wind turbines could only be placed in inaccessible or windy places. Equipment is also developing in the direction of large institutions, and large wi...

AI Technical Summary

Problems solved by technology

The blades currently used are closed airfoils, the blade cross section is streamlined, symmetrical up and down on the horizontal line, the resistance is large, the starting speed is slow, and the aerodynamic efficiency is low

[0005] To sum up, the existing vertical wind power generators still have certain disadvantages when they are in use. Since the blades of the existing vertical wind power generators are closed airfoil blades, when the blades are exposed to wind, their closed The airfoil blades and sweeping area are small, which affects the starting wind speed of the connected wind rotor and the efficiency of converting wind energy. This is a major shortcoming of the existing vertical wind turbine blades

[0006] And because the existing vertical wind power generator blades are closed airfoil structures, when there is a transverse wind acting on the closed airfoil blades, the wind will do laminar flow motion on the closed airfoil blades, resulting in closed airfoil The blades of the type structure have very little resistance to the wind, which reduces the force of the wind acting on the closed airfoil blade and reduces the force of the closed airfoil blade on the wind wheel, thereby reducing the working efficiency of the wind wheel. This is Yet another disadvantage of existing blades

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