Wind power blade with comb-shaped sawtooth structures and mounting method thereof

Abstract

The invention discloses a wind power blade with comb-shaped sawtooth structures and a mounting method thereof. The comb-shaped sawtooth structures are connected with the wind power blade through a bottom board, and an included angle is formed between the center line of the comb-shaped sawtooth structures and the variable pitch axis of the blade; a comb-shaped sawtooth structure body comprises theone or more sawtooth structures; the sawtooth structures are provided with comb-shaped sawtooth structure front edges, comb-shaped sawtooth structure top ends and comb-shaped sawtooth structure rear edges; the comb-shaped sawtooth structure top ends are in an arc shape; and the comb-shaped sawtooth structure front edges are of an arc structure. The wind power blade comprises a blade root portion,a blade middle portion and a blade tip portion, and the comb-shaped sawtooth structures comprise blade tip portion area comb-shaped sawtooth structures, blade middle portion area comb-shaped sawtoothstructures and blade root portion area comb-shaped sawtooth structures. The wing section pneumatic noise can be reduced, the wing section pneumatic performance is improved, the annular energy output is improved, and the pneumatic noise and vibration of the blade are reduced; and the wind power blade can position and mount similar products, the mounting and positioning process is accurate and reliable, and the mounting efficiency is high.

Description

technical field [0001] The invention relates to the field of wind power blades, in particular to a wind power blade equipped with a comb-like sawtooth structure and an installation method thereof. Background technique [0002] A wind turbine in the prior art mainly includes blades, a hub of a nacelle, a tower and a foundation, and the tower and the ground are fixed through the foundation (offshore units may use other foundation forms). The blades are connected to the hub of the nacelle through bearings. The wind turbine absorbs wind energy through the blades and drives the generator shaft to rotate to generate electricity. The output power of the wind turbine is mainly determined by the performance of the blades to absorb wind energy. The blade includes the blade root, the blade middle, the blade tip, the blade leading edge and the blade trailing edge. The blade middle and the blade tip mainly absorb wind energy, and the blade root is mainly used to bear the load and connect...

AI Technical Summary

Problems solved by technology

[0005] However, there are many unreasonable places in the type structure, installation position, material and installation method of the existing technology for the sawtooth structure on the wind blade, and the implementation process of the sawtooth structure described in some prior art Strict experimental verification has not been carried out, and the effect may not be obvious or negative effects may appear in the actual application process

[0006] Specifically, in the prior art, there is no limit to the length of a single sawtooth structure belt. Due to the particularity of the aerodynamic shape on the surface of the wind rotor, there will be difficulties in the installation process, and the change of the curved surface will cause the sawtooth structure belt to peel outward. Prestressing, reducing the reliability of viscose

Moreover, the substrate material of the sawtooth structure in this patent application is glass fiber, and the influence of the material on the noise reduction performance of the sawtooth structure is not considered; in addition, the sawtooth structure in the patent application is cut from a flat plate, and the transition of the plate thickness is not considered. The process will generate a large aerodynamic resistance, and it is easy to cause noise diffraction to reduce the noise reduction effect

[0007] In addition, in the prior art, the relationship between the sawtooth structure and the installation angle in the chord direction of the airfoil is not considered, and the trailing edge sawtooth structure is too sharp to easily form small high-energy eddies, so that the turbulent boundary layer flows through the edge of the trailing edge sawtooth structure. Strong Broadband Scattered Noise

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