Composite Segmented Wind Turbine Blade Structure for Shell Stability
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Solution Overview
Problem
The production of ultra-long wind turbine blades using composite materials is challenging due to sensitivity to production conditions, leading to quality control issues, and the increasing weight and cost of large-scale blades affect structural stability during operation.
Innovation Solution
A segmented blade module structure comprising a blade shell, beams, and webs made of composite materials, with a connecting structure ensuring stability and lightweight design, using a bearing frame that conforms to the blade contour, and a connection mechanism for stable module assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If wind turbine blade size is increased to improve power generation, then power generation capability is improved, but blade weight increases making transportation difficult
Solution Approach 1:
The blade is divided into multiple modules (first blade module, second blade module, etc.) that can be manufactured separately and transported independently. Each module contains its own bearing frame, blade shell, and web structures, allowing the overall blade to achieve large size while maintaining manageable weight for transportation.
2Strength
If composite materials are used to manufacture ultra-long blades, then blade strength is improved, but production quality control becomes difficult
Solution Approach 1:
The blade is segmented into multiple modules that can be manufactured separately using composite materials. This segmentation allows each module to be produced with controlled quality in smaller batches, avoiding the quality control issues associated with manufacturing entire ultra-long blades as single pieces.
Solution Approach 2:
The bearing frame is manufactured separately as a pre-assembled component before being integrated with the blade shell and web structures. This preliminary preparation of critical structural components ensures their quality and strength characteristics are established before final assembly.
3Ease of operation
If segmented blade structure is adopted to solve large-scale blade transportation, then transportation feasibility is improved, but blade structural stability may be compromised
Solution Approach 1:
The blade is divided into modular segments that can be transported separately, improving transportation feasibility while maintaining structural integrity through standardized connection interfaces between modules.
Solution Approach 2:
Multiple blade modules are connected through standardized connection structures (including connection beams and coupling mechanisms) to form a unified blade assembly. This merging of separate modules ensures the overall structural stability required for blade operation while allowing individual modules to be transported independently.
Data Source
AI summary
A segmented blade module structure and a molding method thereof are disclosed. The blade module includes a blade shell, a beam and a web provided in the blade shell, and the beam comprises a connecting beam, a trailing edge beam and an auxiliary beam plate, and a connecting structure is provided at an end of the connecting beam. The beam and the web integrally formed of composite materials constitute a bearing frame that forms a contour shape conforming to the blade, and the blade shell is formed by a skin wrapped on the bearing frame. The auxiliary beam plate is arranged corresponding to the area from the middle portion to the trailing edge portion of the blade shell to ensure that there is sufficient contact area between the beam and the blade shell to avoid instability of the blade shell, ensuring the structural stability of the segmented blade module.