Blade of wind generating set and wind generating set comprising blade

Abstract

The invention relates to a blade of a wind generating set. The blade comprises a blade body and an auxiliary device, wherein the windward face of the blade body is provided with a concave cambered step; the auxiliary device comprises a fixing device, a resetting device and a front edge plate; the fixing device is arranged at a position matched with the concave cambered step of the windward face in the blade body; one end of the resetting device is connected with the fixing device, and the other end of the resetting device is connected with the front edge plate together; and the appearance of the front edge plate is matched with the appearance of the concave cambered step of the windward face. Since the auxiliary device is additionally arranged on the windward face of the blade, the front edge plate extends out when at an interval of low air velocity; and at the time, the sectional lift force of the blade is increased, the torque of an impeller is improved, the starting characteristic of the impeller is improved, and the generating capacity of the wind generating set at the interval of low air velocity is increased. The blade has the advantages of simple principle, convenience in production and manufacturing, obvious use effect, durability, convenience in mounting and suitability for use on the wind generating set. The invention also relates to the wind generating set comprising the blade.

Description

technical field [0001] The invention relates to a wind power generator, in particular to a blade of a wind power generating set and a wind generating set including the blade. technical background [0002] The optimal design basis of wind turbine blades is the tip speed ratio, and only when this condition is met can better output be obtained. This feature makes it impossible to obtain a large enough torque when the wind speed is low, making it difficult to start the unit or the power generation is low. The general practice is to make the unit operate in the low wind speed range only by increasing the starting wind speed and losing power generation. [0003] The main goal of the existing method is to ensure that the impeller runs at the lowest grid-connected speed of the generator, so as to ensure that the unit can operate in the low wind speed range. But at the same time, the blades operate in a state that deviates from the optimal design, and the impeller captures less win...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of difficulty in starting the existing wind power generating set in the low wind speed range and low power generation, the present invention provides a blade of a wind power generating set that is simple in principle and easy to implement and a wind generating set including such a blade

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