Vertical shaft wind power generator

Abstract

A wind-driven electric generator with a vertical rotary shaft is composed of a vertical rotary shaft, a wind driven wheel unit consisting of upper and lower wheels, upper and lower fixing discs and upper and lower bearings, a supporting frame consisting of 2N vertical columns, where N=2-6, and 2N wind guiding plates linked to said vertical columns (one to one) and their guiders.

Description

【Technical field】 [0001] The present invention relates to a wind power generation device, in particular to a vertical axis wind power generation device capable of efficiently utilizing wind energy to generate electricity. When there is a high wind speed, the guide of the wind deflector is automatically adjusted to control the air intake of the wind wheel mechanism, so that the wind wheel mechanism can run at the rated speed. 【Background technique】 [0002] At present, there are mainly two types of devices used for wind power generation: one is the horizontal axis high-speed wind generator, and the other is the vertical axis wind generator; the vertical axis wind generator can be divided into two types according to the form of work: using aerodynamic The vertical axis wind turbine that does work (such as S-type wind turbine) and the vertical axis wind turbine that uses the lift of the airfoil to do work (such as Darrieux type wind turbine). Among them, the horizontal axis hig...

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Problems solved by technology

[0004] Vertical axis wind turbines are divided into two main categories, one is to use aerodynamic resistance to do work, the typical structure is an S-shaped wind wheel, which is composed of two semi-cylindrical blades whose axes are staggered, and its advantage is the starting torque Larger, the disadvantage is that due to the asymmetrical airflow around the wind rotor, it generates lateral thrust; for larger wind turbines, it is difficult to adopt this structural form due to the limitation of deflection and safety limit stress ; The wind energy utilization coefficient of general S-type wind turbines is lower than that of high-speed vertical-axis or horizontal-axis wind turbines, and the power output provided by the wind rotor with a certain size, weight and cost is low, so it is not competitive for power generation

The other type is to use the lift of the airfoil to do work. The most typical is the Darrieux type wind turbine, which has a high work efficiency in the case of high-speed wind, but the work efficiency is poor in the case of low-speed wind. Due to the wind direction and wind speed The range of change is very large. In wind power generation, the wind rotor has high requirements for wind direction and wind speed adaptability. The wind turbine starts to generate electricity when the wind speed reaches the activation wind speed. When the wind speed exceeds the rated value, the speed of the wind rotor increases. Its power generation remains unchanged until the wind speed reaches the cut-off wind speed, so that the wind wheel will automatically stop to protect the entire power generation system

[0005] When the wind speed changes in the existing horizontal axis wind turbines, in order to adjust the speed, it is usually necessary to configure a pitch adjustment system to adjust the power angle of the blades to adapt to the change in wind speed. At the same time, it is also necessary to configure a windward device so that The wind rotor of the horizontal-axis wind turbine adapts to changes in different wind directions, so its disadvantages mainly include: complex structure, high cost, and difficult maintenance; although the existing vertical-axis wind turbines can overcome the problem of wind direction changes, It also has strong adaptability to changes in wind direction and does not require windward devices. However, because of the fixed power angle of the wind blades, it has poor adaptability to changes in wind speed and low work efficiency. It has not been well promoted in practical applications

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