Blade root structure of wind power blade and wind power blade

By setting a reinforcing structure between the bolt sleeve, extension section and filler of the wind turbine blade root, a connection component with a gradually changing equivalent elastic modulus is formed, which solves the problem of insufficient connection strength of the pre-embedded blade root, improves the overall strength and stability of the blade root, reduces the risk of failure, and ensures the safety and reliability of the wind turbine blade.

CN122304912APending Publication Date: 2026-06-30SINOMATECH WIND POWER BLADE
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Patent Information

Application Number
CN202610677098.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-15
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The existing pre-embedded wind turbine blade roots have insufficient connection strength, resulting in poor blade root reliability and easy damage such as interface delamination and cracking, which affects the safety and reliability of wind turbine blades.

Method used

A reinforcing structure is set between the bolt sleeve, extension section and filler to form a connection component with a gradually changing equivalent elastic modulus. By bonding the reinforcing structure with the bolt sleeve, extension section and filler, structural interlocking is formed, which improves the interface connection strength and stability.

Benefits of technology

It significantly improves the overall strength and connection stability of the blade root, reduces the risk of failure, reduces stress concentration at the interface, and enhances the safety, reliability, and long-term operation capability of the blade.

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Abstract

The invention relates to the field of wind power blades, and discloses a blade root structure of a wind power blade and the wind power blade. The blade root structure of the wind power blade comprises a blade root skin structure and a connecting assembly, and the blade root skin structure comprises a first skin layer and a second skin layer which are arranged in the radial direction of the blade root skin structure; an accommodating cavity is formed between the first skin layer and the second skin layer; the connecting assembly is connected to the containing cavity and comprises a plurality of bolt sleeves, a plurality of extension sections, a plurality of filling pieces and a reinforcing structure, the bolt sleeves are arranged in the circumferential direction of the blade root skin structure at intervals, the extension sections are connected to the ends, in the length direction of the extension sections, of the bolt sleeves, and the filling pieces are arranged between every two adjacent bolt sleeves; the filling piece is supported between the first skin layer and the second skin layer, and reinforcing structures are connected between the filling piece and the bolt sleeve as well as between the filling piece and the extension joint in a bonding manner; the equivalent elastic modulus of the reinforcing structure is larger than that of the extension section and smaller than that of the bolt sleeve. And the blade root reliability can be improved.
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