In the field of electricity and energy, the wind wheel refers to the wind turbine component that converts the wind energy into mechanical energy. It consists of blades and hubs.

Nowadays, there are many kinds of wind wheels, but they can be classified into two types: horizontal axis wind wheel, wind wheel rotating shaft parallel to wind direction, vertical axis wind wheel, wind wheel rotating shaft perpendicular to the ground or air direction.

Characteristics of vertical axis self changing blade wind wheel:

Since the vertical axis variable blade wind wheel inherits the advantages of vertical axis type wind wheel, to overcome its shortcomings, thus forming a unique features: the wind wheel does not need to swing with the wind, the motor position is fixed, the energy utilization rate, low starting wind speed; stable operation, low noise, simple structure, safe and reliable; construction convenient, cost and maintenance cost etc..

Characteristics of horizontal axis trefoil wind wheel:

The purpose of wind turbines is to generate electricity by wind power. The existing wind turbine is mainly horizontal shaft trefoil type, because this type of wind in the direction of the wind must swing, resulting in more complex structure, energy consumption, noise, and affect the life, cost and maintenance.

Characteristics of existing vertical shaft type wind wheel:

The vertical shaft type wind wheel does not need to swing along with the wind direction, the motor position is fixed, the operation is stable, the noise is small, etc.. However, the existing vertical axis variable blade wind turbine is not affected by the wind direction, but the wind blade is in the upwind period for half of the time. Such as the current Savonius wind turbine is the use of drag blade shape change in wind cycle when the windward blade is concave in the period when the wind pressure is relatively large, the wind is convex windward wind pressure is smaller, resulting in differential pressure drive windmill rotation; fixed wing

The blade wind turbine uses the lift of the wing to drive the windmill, but the downwind period of the two types of windmills is the same as that of the upwind period, so the torque is low when the wind speed is low. The current vertical axis wind turbine is smaller than the horizontal shaft power of similar size, and the vertical shaft type of the same power wind turbine is much more expensive, so the existing vertical axis wind turbine can not be promoted, and large vertical axis type, especially megawatt level, is difficult to realize. ]

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