Variable pitch blade and wind turbine provided with variable pitch blade

Abstract

The invention relates to a variable pitch blade and a wind turbine provided with the variable pitch blade. The variable pitch blade comprises at least two blade sections which are sequentially connected. At least one blade section can rotate around one axis. According to the above variable pitch blade, pitch angles can be changed by controlling the different blade sections so as to achieve local pitch changing of the variable pitch blade so that the variable pitch blade can obtain the highest wind energy absorbing efficiency under the conditions of the different wind speeds and the different rotating speeds, the problem that the overall variable pitch blade cannot obtain the optimal wind energy absorbing efficiency at different wind speeds and different rotating speeds is solved accordingly, the wind energy utilization rate of the wind turbine provided with the variable pitch blade is increased under the same wind regime condition, the generating capacity of the wind turbine is finally improved, and the resource utilization efficiency is improved.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a pitch-variable blade and a wind generator provided with the pitch-variable blade. Background technique [0002] Most of today's energy sources are fossil fuels, and as non-renewable resources, fossil fuels will be used up in a limited time, and during the use of fossil fuels, a lot of environmental pollution will be generated, which will bring great harm to the ecological environment of the earth. had a greater impact. Wind energy, as a renewable, non-polluting, high-energy, and promising energy source, can effectively alleviate air pollution, water pollution, and global warming while providing stable power supply for economic growth. attention and application. [0003] The variable-speed overall variable-pitch blades of wind turbines currently used can change the overall blade pitch angle (that is, the angle between the airfoil chord line at the top of the blade and the ...

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a pitch angle that can meet the requirements of high wind speed and maximize the wind energy absorption coefficient for the problem that the pitch angle of the wind turbine blades cannot meet the requirements of high wind speed, resulting in a decrease in the wind energy absorption coefficient of the blades. Blade and wind turbine provided with the blade

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