Wind Turbine Spar Cap Clipping Layer for Trailing-Edge Fixation
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Solution Overview
Problem
The integration of spar caps in wind turbine rotor blades, particularly near the trailing edge, is challenging due to limited space and the need for precise placement to ensure structural integrity, load distribution, and aerodynamic performance.
Innovation Solution
A spar cap design featuring a stack of fiber material layers with a protruding clipping mechanism, including a protruding layer to fix the spar cap in a mold, the clamping mechanism, and a mold, the clamping mechanism, and a mold, the clamping mechanism, and a method of manufacturing a half shell, the clamping mechanism, and a method of manufacturing a half shell of a wind turbine rotor blade.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a spar cap is integrated near the trailing edge of a wind turbine rotor blade, then the stiffness and structural integrity of the blade is improved, but the manufacturing precision and placement accuracy become more difficult due to limited space
Solution Approach 1:
The clipping layer is pre-formed as part of the spar cap structure before integration into the blade. This protruding clipping layer is prepared in advance with the exact geometry and positioning features needed, allowing for precise placement in the limited space near the trailing edge without compromising manufacturing accuracy
Solution Approach 2:
The clipping layer acts as an intermediary element between the spar cap and the surrounding blade structure. It provides a dedicated interface for bonding and positioning, enabling precise placement and secure integration of the spar cap in the constrained trailing edge region while maintaining high manufacturing precision
2Strength
If the spar cap thickness is increased to provide sufficient stiffness, then the mechanical performance is improved, but the available space near the trailing edge is exceeded
Solution Approach 1:
The spar cap structure is segmented into the main spar cap body and the separate protruding clipping layer. This segmentation allows the stiffening function to be distributed: the main body provides the necessary thickness for stiffness, while the clipping layer extends the functional reach without increasing the critical thickness dimension that would exceed available space near the trailing edge
3Manufacturing precision
If the spar cap is placed with high precision in the mold, then the load distribution and aerodynamic performance are improved, but the fixation and positioning during manufacturing become more challenging
Solution Approach 1:
The clipping layer serves as a mediator between the spar cap and the mold during manufacturing. Its protruding geometry provides dedicated bonding surfaces and positioning features that facilitate precise fixation in the mold, enabling high placement precision while simplifying the manufacturing process through inherent alignment and attachment mechanisms
Data Source
AI summary
A spar cap is for a wind turbine rotor blade. The spar cap includes a stack of fiber material layers, which are stacked in a stacking direction from a bottom face to a top face, and a clipping layer which is arranged on the top face of the stack. The clipping layer protrudes beyond the stack of fiber material layers in a lateral direction which is perpendicular to the stacking direction. A set is for manufacturing a half shell of a wind turbine rotor blade. An assembly includes a spar cap and a mold. A method is for manufacturing a half shell of a wind turbine rotor blade.