Wind Turbine Blade Metal Insert Bonding via Interface Layer
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Solution Overview
Problem
Existing methods for manufacturing wind turbine rotor blade elements with metal inserts face challenges in achieving consistent and strong bonding due to variations in the quality of liquid plastics and laminate materials.
Innovation Solution
The method involves applying an interface layer between the metal insert and the liquid plastics material, which forms strong bonds with both the metal insert and the composite material while preventing direct contact between the metal insert and the liquid plastics, thereby ensuring consistent anchoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If metal inserts are directly embedded in liquid plastics material, then the manufacturing process is simple, but the bonding consistency deteriorates due to material quality variations
Solution Approach 1:
An interface layer is introduced between the metal insert and the liquid plastics material. This interface layer acts as a mediator that ensures consistent bonding quality regardless of variations in the liquid plastics or laminate materials. The interface layer has specific properties that enable reliable adhesion to both the metal insert surface and the composite material, thereby resolving the contradiction between manufacturing simplicity and bonding consistency.
2Strength
If surface treatments are applied to metal inserts to improve bonding, then the bonding strength increases, but the manufacturing complexity increases
Solution Approach 1:
Instead of relying on complex surface treatments of the metal insert, the patent introduces an interface layer that provides the necessary bonding properties. This approach achieves high bonding strength while avoiding the complexity of multiple surface treatment steps, as the interface layer itself is designed to facilitate strong adhesion to both metal and composite materials.
Solution Approach 2:
The patent changes the material parameters by introducing an interface layer with specific chemical and physical properties that are optimized for bonding to both metal inserts and composite materials. This parameter change allows achieving high bonding strength without modifying the metal insert surface complexity.
3Ease of operation
If direct contact between metal insert and liquid plastics is allowed, then the process is straightforward, but bonding quality varies with material quality
Solution Approach 1:
The interface layer serves as a buffer between the metal insert and the liquid plastics material, decoupling the bonding process from variations in material quality. This maintains the straightforwardness of the overall process while ensuring consistent bonding quality, as the interface layer compensates for material variations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach facilitates easier and more consistent achievement of strong anchoring of the metal insert in the composite material, even with varying qualities of the liquid plastics material, thus meeting specifications effectively.
Implementation Method 1
applying an interface layer between the metal insert and the liquid plastics material, which forms strong bonds with both the metal insert and the composite material
Data Source
Figure 1~2
Figure 3
AI summary
A method of manufacturing a wind turbine rotor blade element, the method comprising the following steps: • providing a metal insert having a longitudinal axis, a circumferential outer surface and a joining portion for connecting the wind turbine rotor blade element to a wind turbine rotor hub or to another wind turbine rotor blade element, • wrapping the metal insert in an interface layer, such that the entire circumferential outer surface is covered by the interface layer, • wrapping the metal insert in a first fibre layer such that the interface layer is arranged between the circumferential outer surface and the first fibre layer, • positioning the wrapped metal insert in a mould, • arranging a plurality of second fibre layers in the mould, • embedding the plurality of second fibre layers and the wrapped metal insert in a liquid plastics material, • curing the liquid plastics material and the interface layer in the mould.