Composite rotor system of wind motor

Abstract

The invention provides a controllable compound birotor system for a windmill, which simultaneously uses a pilot rotor working under the condition of low speed and a main rotor working under the condition of high speed, wherein, by the proper switch of an overrunning clutch, the windmill obtains the larger starting torque under the condition of low wind speed, catches and utilizes the wind energy with low wind speed after starting, and gives full play to the advantage of excellent wind catching efficiency of the main rotor under the conditions of high wind speed and high rotating speed, thereby catching and utilizing the wind energy of low and high wind speed, greatly widening the developable and utilizable speed range and the territorial scope of the windmill and providing convenience for the popularization and the utilization of the windmill.

Description

technical field [0001] The invention relates to a wind wheel rotor system of a wind turbine, in particular to a controllable dual-rotor composite rotor system. Background technique [0002] One of the outstanding difficulties in the field of wind engine technology is the lack of effective capture of low wind speed wind energy, thus restricting the use of wind turbine space. Due to the lack of sufficient starting torque under low wind speed conditions, low-speed wind energy cannot be captured. For horizontal axis wind turbines, it is generally considered that 3-4 m / s is a bottleneck. Wind energy below this value cannot be effectively captured and cannot be formed. The ideal rotational torque is used to drive a generator, etc., and is generally cut off. However, according to statistics, in areas that are conveniently developed by humans, areas with wind speeds less than 4 m / s account for no less than 85% of the total land area, which means that in most areas and most geograph...

AI Technical Summary

Problems solved by technology

[0010] In short, as far as the various technical routes that have been disclosed are concerned, none of them can solve the difficult problem of using one wind turbine at the same time to solve the problem of low-speed and high-speed high-efficiency wind energy utilization.

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