Rotor Blade Half-Shell Alignment Using Wedge Tolerance Compensation
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Solution Overview
Problem
The positioning of spar caps and core material in wind turbine rotor blade manufacturing is not repeatable, leading to time-consuming manual adjustments due to high tolerance requirements and small gaps between components.
Innovation Solution
A method involving the use of wedge-shaped tolerance compensation elements that interact in a form-fit manner with corresponding counter wedge-shaped portions to allow for slight relative movement during placement, ensuring accurate alignment without manual cutting, using a mold with fixed positions for spar caps and core elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual positioning and adjustment of spar caps and core material is used, then alignment precision can be achieved, but manufacturing time and process complexity increase significantly
Solution Approach 1:
The mold includes pre-configured positioning elements and guide structures that automatically align spar caps and core material during placement. The positioning elements are prepared in advance within the mold cavity, enabling automatic positioning without manual measurement and adjustment, thus achieving high precision while reducing manufacturing time
Solution Approach 2:
Positioning elements serve as intermediary components between the mold and the spar caps/core material. These intermediaries provide precise geometric references and physical constraints that guide the placement of structural components, ensuring accurate alignment without requiring manual positioning skills
2Reliability
If tight tolerance requirements are enforced with small gaps between components, then structural integrity is improved, but positioning difficulty and manual intervention increase
Solution Approach 1:
The positioning elements are designed to automatically self-align and self-adjust during the placement process. The geometric features of the positioning elements and the components they support create inherent mechanical interlocks and guide surfaces that automatically maintain optimal gaps and alignment, eliminating the need for complex manual positioning procedures while ensuring structural integrity
Solution Approach 2:
The mold positioning system incorporates adjustable parameters such as positioning element locations, guide surface angles, and gap dimensions that can be optimized for different component configurations. By changing these geometric parameters, the system maintains tight tolerances and small gaps while adapting to different structural requirements without increasing positioning complexity
Data Source
AI summary
A method of manufacturing a half shell of a wind turbine rotor blade, the method including: providing a mold, arranging an outer shell laminate in the mold, arranging three spar caps on the outer shell laminate. The second spar cap is arranged between the first spar cap and the third spar cap, the third spar cap is positioned at an outermost trailing edge, and core elements are arranged between the first spar cap and the second spar cap and/or between the second spar cap and the third spar cap and/or between the first spar cap and the third spar cap. At least one of the core elements is a tolerance compensation element that includes a wedge-formed portion and interacts in a form-fit manner with a corresponding counter wedge-formed portion. A wind turbine rotor blade includes a half shell.