Vertical shaft wind turbine with lifting power and resistance complementary adjustment

Abstract

The invention relates to a vertical shaft wind turbine with lifting power and resistance complementary adjustment, which comprises a lifting power type vane, a resistance type vane, a support, a rotary shaft and a resistance type vane adjusting mechanism, wherein the adjusting mechanism is used for adjusting the position of the resistance type vane in the radical direction of the rotary shaft of the wind turbine or the windward side angle of the resistance type vane. By adjusting the position and the angle of the resistance type vane in the integral structure of the wind turbine, the optimal adjustment for the tip speed ratio Lambada of the vertical shaft wind turbine is simply and easily realized, the rated wind speed of the wind turbine can be designed or adjusted according to the actual wind speed and density of a wind field so that the wind turbine reaches the optimal wind energy collecting efficiency under a rated wind speed, the problem of low wind speed start of the wind turbine is solved, simultaneously the upper limit of wind energy and wind speed connection of the lifting power type vane is also improved, and the wind speed range of the wind turbine is further expanded so that the utilization rate of the wind energy is further improved; and besides, the damages and influences of super-high wind speeds (wind damages) to the wind turbine are also effectively reduced.

Description

technical field [0001] The invention relates to a wind power engine, in particular to a vertical axis wind power engine which is combined and adjustable with lift type blades and resistance type blades to realize complementary characteristics. Background technique [0002] Vertical-axis wind turbines and horizontal-axis wind turbines are two major categories of wind turbines today. Vertical-axis wind turbines do not need to face the wind when the wind direction changes, and can greatly simplify the structure of the fan. For a long time, they have attracted much attention and research. . [0003] The vertical axis wind turbine has experienced a long process of development and evolution, and there have been various forms of fan blades, and the lift type blade is the most commonly used one among various types of blades. However, there are two deficiencies in the vertical-axis wind turbine composed of a single lift-type blade. One is that it is difficult to start under low wind...

AI Technical Summary

Problems solved by technology

However, the fan structure in which the positions of the drag-type blades and the lift-type blades are fixed can reduce the wind speed required for fan startup, but it is still difficult to keep the rotation speed of the fan shaft at the rated speed under high wind speed conditions, because the lift type The linear speed of the blade can reach three to five times of the wind speed. If the rotating shaft speed of the fan exceeds the rated speed, it will cause mechanical damage to the fan on the one hand. Even if the mechanical structure of the fan is not damaged by strong wind, the rotating shaft speed is too high. , if the deceleration mechanism is not added for deceleration, the optimal parameter design requirements of the generator cannot be met, because in the natural state, the probability of low wind speed is relatively high, so the generator parameter design must pay attention to the generator under the condition of low wind speed power output

And when the speed of the fan exceeds the upper limit of the speed, the output power of the generator will drop instead.

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