Blade structure of wind driven generator, manufacturing method and wind driven generator

Abstract

The invention provides a blade structure of a wind driven generator, a manufacturing method and the wind driven generator, the blade structure is provided with a first end fixedly connected with a hub of the wind driven generator, a plurality of first connecting holes are formed in the end face of the first end in the circumferential direction, and the first connecting holes are distributed in a circular ring shape; the end face of the first end is further provided with a plurality of second connecting holes in the circumferential direction, the second connecting holes are located in the inner circumferential side or the outer circumferential side of the circular ring, and the second connecting holes are formed by embedded bolt sleeve assemblies. The second layer of connecting holes formed by the embedded bolt sleeve assembly are additionally formed in the blade root of the blade structure, and bolts penetrate into the two layers of connecting holes from the hub end to be connected with the two layers of connecting holes, so that the connecting strength of the blade structure at the blade root is enhanced, and the bearing capacity of the blade root is improved.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a blade structure and a manufacturing method of a wind power generator and the wind power generator. Background technique [0002] The wind rotor is the energy capture unit of the wind turbine. During the rotation of the wind rotor, the load at the root of the blade is the most complex, and its size and direction are constantly changing, and the level of the load is also very high. It is fatigue damage and The hardest hit area where the fracture occurred. [0003] At present, the connection between the blades of the wind turbine and the central hub is connected by single-layer bolts. Under the trend of large-scale wind turbines, the wind wheel is getting bigger and the blades are getting longer, which leads to the load on the blade root. As the value increases, the ultimate load and fatigue damage of the blade root bolts will gradually increase, and the connection strength a...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the single-layer bolt connection between the blades and the central hub of the wind power generator in the prior art. When the blades are continuously lengthened, the ultimate load and fatigue damage of the blade root bolts are also gradually increased. , leading to the defect of reducing the connection strength at the blade root of the blade structure, providing a blade structure and manufacturing method of a wind power generator and a wind power generator

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