Self-starting large-scale Darrieus fan with auxiliary wing variable pitch

Abstract

The invention discloses a self-starting large-scale Darrieus fan with auxiliary wing variable pitch. The fan comprises a base, a tower and a wind wheel assembly, wherein the wind wheel assembly is arranged at the top end of the tower and comprises a wind wheel shaft, multiple main wings, multiple auxiliary wings and multiple variable-pitch drive devices; the multiple main wings are distributed atan evenly spaced way around the circumferential direction of the wind wheel shaft; each main wing is fixedly connected with the wind wheel shaft through a connecting assembly; the multiple auxiliary wings are distributed at an evenly spaced way around the circumferential direction of the wind wheel shaft, are arranged on one sides, close to the wind wheel shaft, of the multiple main wings in a one-to-one correspondence way, and are rotatably connected onto the connecting assemblies between a first position and a second position around the vertical axis; and the multiple variable-pitch drive devices are used for driving the auxiliary wings to rotate between the first position and the second position. According to the fan provided by the invention, on the premise of ensuring low speed and astarting performance, the wind energy conversion rate of the fan at high speed is ensured.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a self-starting large Darrieux wind turbine with variable pitch of the auxiliary wings. Background technique [0002] The world's energy is currently showing a trend of clean development. According to the latest "China Renewable Energy Development Report 2017" (hereinafter referred to as the "Report"), by 2017, the proportion of global renewable energy consumption has reached 10.4%. China's renewable energy consumption accounted for 11.7%. By the end of 2017, the total installed capacity of renewable energy in China was about 650 million kilowatts, accounting for 36.6% of the country's total installed capacity, and the total amount of renewable energy power generation accounted for 26.5% of the country's total power generation. Wind power is the second largest renewable energy in China after hydropower in terms of installed capacity. By the end of 2017, the install...

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Problems solved by technology

[0007] The two types of vertical-axis wind turbines currently exist have their own advantages and disadvantages. Conventional composite wind turbines have improved the start-up performance of Darrieus-type wind turbines and weakened their wind energy conversion efficiency at high wind speeds, so they do not have the advantage of commercialization. , the present invention aims at this pain point

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