Wind Turbine Blade Bushing Segmentation
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Solution Overview
Problem
Current wind turbine blade bushing systems are costly due to expensive manufacturing processes and material requirements, as they are made from high-strength steel blanks that incur significant waste and high production costs, especially since multiple bushings are needed per blade.
Innovation Solution
A wind turbine blade bushing system comprising two separate parts: a threaded element made from high-strength material for retaining mounting bolts and an anchor element made from lower-cost material for anchoring, connected via adhesive, soldering, or threading, allowing for reduced machining and material costs while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bushings are manufactured from high-strength steel blanks via milling or turning operations, then the bushings can handle high root end pulling forces, but the manufacturing cost and waste product increase significantly
Solution Approach 1:
The bushing is divided into two separate parts: a threaded element made from high-strength material and an anchor element made from lower-cost material. This segmentation allows each component to be optimized for its specific function, reducing overall manufacturing cost while maintaining the required strength for handling root end pulling forces.
Solution Approach 2:
Different parts of the bushing system use different material qualities appropriate to their functional requirements. The threaded element uses high-strength material where it is needed to handle bolt loads, while the anchor element uses lower-cost material sufficient for anchoring purposes, optimizing material usage and reducing waste.
2Strength
If the entire bushing is made from steel-grade material capable of picking up bolt forces, then the connection strength is sufficient, but the material cost increases
Solution Approach 1:
The bushing system is segmented into a threaded element and an anchor element, allowing the high-strength material to be used only where necessary (threaded element for bolt force transfer) rather than throughout the entire bushing structure.
Solution Approach 2:
High-strength material is applied locally to the threaded element where it is required for connection strength, while the anchor element uses lower-cost material, optimizing material cost while maintaining sufficient connection strength.
3Strength
If standard high-strength bolts are used with bushings, then a strong connection is achieved, but the overall manufacturing cost of multiple bushings per blade becomes significant
Solution Approach 1:
By segmenting the bushing into separately manufacturable threaded and anchor elements, the production process can be optimized and parallelized, improving manufacturing efficiency for the large quantities of bushings required per blade while maintaining connection strength.
Data Source
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AI summary
A wind turbine blade bushing system for arrangement in a root end of a wind turbine blade is described. The wind turbine blade bushing system comprises a threaded element for retaining a mounting bolt for a wind turbine blade, the threaded element being formed from a first material; and an anchor element for arrangement at the root end of the wind turbine, wherein the anchor element acts to at least partly retain the threaded element in the wind turbine blade, the anchor element being formed from a second material. The first material has a higher strength and higher fracture toughness than the second material.