Variable pitch blade and wind turbine provided with variable pitch blade

A technology of wind turbines and blades, which is applied in the field of wind power generation and can solve problems such as the decrease of the wind energy absorption coefficient of blades

Inactive Publication Date: 2016-12-14
GUANGZHOU VOCATIONAL COLLEGE OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Variable pitch blade and wind turbine provided with variable pitch blade
  • Variable pitch blade and wind turbine provided with variable pitch blade

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Embodiment Construction

[0018] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes ...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06F03D9/25F03D15/10
CPCF03D1/0675F05B2270/328Y02E10/72
Inventor 江东梅屈圭陈建环
Owner GUANGZHOU VOCATIONAL COLLEGE OF SCI & TECH
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