Forked type blade with multiple auxiliary wings

Abstract

The invention discloses a forked type blade with multiple auxiliary wings. The forked type blade comprises a main blade body, the auxiliary wings and connecting pieces, wherein the main blade body is formed by a blade root and a blade body, the blade root is in the shape of a cylinder and can be connected with a hub, the blade body is formed by gluing multiple position-corresponding webs arranged in the blade and skin with which the webs are covered, and the blade body is in the shape of a paddle and has excellent aerodynamic performance; the shape of the auxiliary wings is the same as that of the main blade body which corresponds to the auxiliary wings in position, and the width of the auxiliary wings is smaller than that of the blade body; the connecting pieces are in the shape of cylinders, and are arranged at the two ends of the auxiliary wings and used for connection of the blade body and the auxiliary wings. By installing the auxiliary wings, the starting torque and operation torque of a wind generating set are improved, the rotation speed during operation is reduced, and the roles of improving the starting characteristic, lowering blade noise and increasing the wind power utilization factor and generating capacity under a low air speed of the wind generating set are played.

Description

technical field [0001] The invention relates to the technical field of wind power generation equipment, in particular to a bifurcated blade with a plurality of auxiliary wings. Background technique [0002] With the outbreak of energy crisis worldwide, wind energy, water energy, tide and other renewable energy sources are getting more and more attention. Compared with other renewable energy sources, wind energy has the characteristics of large reserves, wide distribution, low energy density, large differences in different regions, and poor stability. system development. [0003] The role of the wind rotor in the wind turbine is to absorb wind energy and convert the wind energy in the natural wind into mechanical energy during the rotation of the wind rotor. Among them, the blade is the main part of the wind rotor to absorb wind energy. The aerodynamic design and structural design of the blade determine the ability of the wind rotor to capture wind energy and the power gene...

AI Technical Summary

Problems solved by technology

However, due to the instability of wind energy, wind turbines often operate at lower wind speeds. Under low wind speeds, the start-up performance of wind turbines is poor, and the wind energy utilization coefficient is low. These problems are more obvious.

At the same time, because the blade at the tip is relatively thin and the strength is weak, a strong tip vortex is generated, resulting in a decrease in blade efficiency, an increase in fatigue load, and an increase in blade tip noise, which affects the aerodynamic performance of the blade.

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