Vertical-axis wind turbine with simply mounted inner and outer movable fan blades

Abstract

The invention relates to a vertical-axis wind turbine with simply mounted inner and outer movable fan blades. An inner movable fan blade and an outer movable fan blade simultaneously run and play respective role at different upwind angles. The rotation of the two movable fan blades increases the upwind stress area of the fan blades in downwind period to greatly improve the efficiency of the prior vertical wind turbine and increases the starting torque force in the condition of low wind speed to enable a small wind turbine to be more popular and practical. In the invention, the gravity center of the whole device including a main shaft, an upper fan blade bracket, a lower fan blade bracket and the inner and the outer movable fan blades is lowered on purpose, the installation method of simply connecting upper and lower gears is cooperated with a vertical middle and small power ultra-low speed generator to reduce the costs of products and installation, thereby the small wind turbine is popularized easily.

Description

Technical field: [0001] The invention relates to a vertical axis wind-driven generator with simple installation of inner and outer movable blades. The inner movable blades and the outer movable blades work at the same time, and play their respective functions at different windward angles. During the cycle, the area of ​​windward force of the wind blade increases, thereby greatly improving the efficiency of the existing vertical wind power generators, increasing the starting torque at low wind speeds, and making small wind power generation more popular and practical. [0002] The present invention deliberately lowers the center of gravity of the entire device (including the main shaft, the upper and lower fan blade brackets, and the inner and outer movable fan blades), and uses the installation method of simple linkage of the upper and lower gears, coupled with a vertical type, medium and small power ultra-low speed generator, which can reduce product and installation costs, and...

AI Technical Summary

Problems solved by technology

[0003] Existing wind turbines are mainly horizontal-axis three-leaf type, because this type must swing with the wind when the wind direction changes, resulting in a more complicated structure, which affects life, cost and maintenance

Although the vertical generator is not affected by the wind direction, half of the time the wind blades are in the upwind cycle. At present, the Savonius wind resistance type wind turbine uses the change of the shape of the wind blades. In the downwind cycle, the blades on the windward side are concave. In the upwind period, the wind pressure on the convex side is relatively small, which causes the pressure difference to push the windmill to rotate; the wing-type fixed blade wind turbine uses the lift of the wing to push the windmill to rotate, but the downwind of these two windmills The area of ​​the windward side is the same for the cycle and the upwind cycle, so the power starting torque is low at low wind speed

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