Umbrella-shaped wind machine power adjusting device capable of actively adjusting shrinking angle and attack angle of blades

Abstract

The invention provides an umbrella-shaped wind machine power adjusting device capable of actively adjusting shrinking angle and attack angle of blades. The umbrella-shaped wind machine power adjustingdevice capable of actively adjusting the shrinking angle and the attack angle of the blades comprises a wind driven generator, a hollow main shaft, a push-pull rod, a big hub and a small hub; a plurality of blade brackets are arranged on the big hub circumferentially; the blades are fixedly arranged on the blade brackets; the small hub is circumferentially provided with a supporting rod; a connecting groove for mounting the blade brackets in the circumferential direction of the big hub and the axial direction of the hollow main shaft form a certain deflection angle; and by the deflection angle, in the process of doing umbrella-shaped closing action by the blades, the blades can rotate around the hollow main shaft by a certain angle, so that the attack angle of the blades is changed whilethe shrinking angle of the blades is changed. By the adjusting device, in the process of controlling the blades by a servo motor to do umbrella-shaped closing action, the blades can rotate around a mounting shaft by a certain angle and the aims of changing the swept area of a wind wheel and changing the attack angle of the blades are fulfilled, so that the aspect of controlling power output is efficient and convenient, and safe operation of a wind generating set is protected.

Description

technical field [0001] The invention mainly relates to the technical field related to wind power generators, in particular to an umbrella-shaped wind power regulating device for actively adjusting blade retraction angle and attack angle. Background technique [0002] Small and medium-sized wind turbines usually adopt a fixed-pitch structure. The power control goal of the unit is mainly to achieve maximum power at low wind speeds and speed limit protection in high wind speed areas. Most small and medium-sized wind turbines usually do not have active power adjustment mechanisms. Therefore, in the case of strong winds, it is very easy for the wind turbine to overspeed and cause excessive output power or even burn the motor. In fact, the goal of wind turbine power control should also include power regulation according to changes in electrical load. For example, at a wind speed of 6m / s, the wind turbine can generate 100W of electric power, and the wind turbine can vary from 0 to...

AI Technical Summary

Problems solved by technology

However, in the above-mentioned technologies, since only the blade shrinkage angle can be changed, the blade angle of attack cannot be adjusted, so the options in power control are small, and the control efficiency is relatively low.

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