Multilayer Composite Rotor Blade Protection
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Solution Overview
Problem
Rotor blades for wind turbines face erosion and abrasion issues due to high wind loads, temperature fluctuations, and environmental factors, leading to reduced aerodynamics and stability, and existing protective methods either slow down production or fail to provide sufficient abrasion resistance.
Innovation Solution
A composite component with a layer construction of polyethylene, polyurethane or elastomer, and fiber-reinforced plastic, where the polyethylene and polyurethane layers are joined in a first operation and the fiber-reinforced plastic is added in a second operation, allowing for lower temperature assembly and improved adhesion without the need for additional curing, enhancing wear and abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gelcoat process is used to protect rotor blades against weathering and erosion, then the protective surface layer is achieved, but the production time is significantly extended due to mandatory waiting for minimum working time
Solution Approach 1:
The patent changes the chemical parameters of the adhesive system by using a two-component adhesive with specific mixing ratios and catalyst systems that enable rapid curing. This allows the adhesive to reach sufficient strength in minutes rather than hours, directly resolving the contradiction between protective surface quality and production speed by modifying the chemical reaction parameters.
Solution Approach 2:
The method applies adhesive and surface foil in a preliminary step before the main infusion process, allowing these layers to be pre-positioned and partially cured. This preliminary action enables subsequent steps to proceed without waiting for complete adhesive curing, thereby maintaining production speed while ensuring proper bonding.
2Reliability
If polyethylene foil is used to improve abrasion resistance, then wear resistance is significantly enhanced, but bonding to resin-based materials becomes extremely difficult
Solution Approach 1:
The patent introduces a two-component adhesive system as an intermediary between the polyethylene foil and the resin-based composite. This adhesive contains specific coupling agents and catalysts that enable chemical bonding to both the polyethylene surface and the underlying fiber-reinforced resin, thereby resolving the incompatibility issue and enabling successful manufacturing.
Solution Approach 2:
The solution employs a composite adhesive system combining multiple chemical components with complementary functions: one component provides surface activation and coupling capability, while the other provides structural bonding strength. This composite adhesive material successfully bridges the gap between polyethylene foil and resin composite, enabling reliable bonding despite their inherently poor compatibility.
3Reliability
If multiple curing steps are required to bond polyethylene foil with rubber attachment layers, then adequate bonding is achieved, but the production process becomes complex and time-consuming
Solution Approach 1:
The patent merges the adhesive bonding function and the curing function into a single integrated two-component adhesive system. This unified system provides both the bonding mechanism and the curing reaction in one application step, eliminating the need for separate rubber attachment layers and multiple curing cycles, thereby simplifying the overall manufacturing process while maintaining reliable bonding.
4Reliability
If rotor blade speed is limited to reduce erosion, then abrasion resistance is improved, but power output is reduced
Solution Approach 1:
The patent changes the material parameters of the rotor blade surface by applying a polyethylene foil coating with superior abrasion resistance. This material parameter change allows the blade to withstand higher operational speeds and more severe environmental conditions without eroding, thereby enabling increased power output without sacrificing erosion resistance.
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
The composite component achieves high wear and abrasion resistance while simplifying and accelerating the production process, maintaining low temperatures and improving adhesion between layers, thus enhancing the durability and performance of rotor blades.
Implementation Method 1
the layers (11) and (12) have been joined in a first operation to form a laminate composite
Implementation Method 2
the layer (13) have been joined in a second operation onto the laminate composite comprising the layers (11) and (12)
Data Source
AI summary
A method of forming a composite component comprising a layer which consists at least partly of polyethylene, a layer which consists at least partly of a polyurethane and/or an elastomer, at least one layer which consists at least partly of a plastic reinforced by fibers, or which consists at least partly of an adhesive, wherein the layer is disposed directly between the layer and the layer, wherein the layers have been joined in a first operation to form a laminate composite and the layer have been joined in a second operation onto the laminate composite comprising the layers.