Wind Turbine Rotor Blade Erosion Protection Composite
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Solution Overview
Problem
Rotor blades in wind turbines face erosion and abrasion due to high wind loads, temperature fluctuations, and environmental factors, leading to reduced aerodynamics and increased maintenance costs, while existing protective methods either slow down production or do not provide sufficient abrasion resistance.
Innovation Solution
A composite component with a layer structure consisting of polyethylene, an elastomer, and a thermoset or thermoplastic, where a textile fabric with rovings is embedded between the layers to enhance adhesion and mechanical properties, using ultra-high molecular polyethylene and ethylene-propylene-diene rubber for improved wear resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gel coat method is used to protect rotor blades against erosion, then the surface protection is improved, but the manufacturing time increases due to minimum processing time requirements
Solution Approach 1:
The patent changes the material parameters by using thermoplastic materials instead of traditional gel coat systems, allowing the surface layer to be applied and processed without minimum waiting times. The thermoplastic material can be heated and molded immediately, eliminating the curing wait time required by gel coat methods while maintaining erosion resistance.
Solution Approach 2:
The patent employs a composite structure with multiple layers including thermoplastic surface layers, fiber-reinforced layers, and intermediate layers. This composite approach combines the erosion resistance of thermoplastic materials with the structural integrity of fiber reinforcements, achieving both protection and manufacturing efficiency.
2Reliability
If the maximum speed of the wind turbine system is limited to reduce blade tip erosion, then the erosion resistance is improved, but the performance decreases
Solution Approach 1:
The patent applies protective surface layers made of erosion-resistant thermoplastic materials to the rotor blade surfaces before operation begins. This beforehand protection allows the blades to operate at high speeds without suffering erosion damage, eliminating the need to limit system speed while maintaining both performance and erosion resistance.
3Strength
If adhesive layers are used between polyethylene and elastomer layers, then the bond strength is improved, but the device complexity increases
Solution Approach 1:
The patent merges the adhesive function into the elastomer layer itself by formulating the elastomer composition to provide inherent adhesion to both the polyethylene surface layer and the underlying structural layers. This eliminates the need for separate adhesive layers, maintaining bond strength while reducing structural complexity.
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 with reduced production time and low temperatures, maintaining a lightweight structure and extending the service life of rotor blades.
Implementation Method 1
a textile fabric (14) with rovings (15, 16, 17) is arranged between the layers (12) and (13) in that part of the rovings (15) is completely embedded in the layer (12) at least in places, part of the rovings (16) is completely embedded in the layer (13) at least in places and some of the rovings (17) are embedded at least in places partially in the layer (12) and partially in the layer (13)
Implementation Method 2
a layer (11) which consists at least partially of polyethylene... Ultra High Molecular Polyethylene (UHMW-PE)... characterized by very good wear and abrasion resistance, even with abrasive media
Implementation Method 3
a layer (12) which consists at least partially of an elastomer... ethylene-propylene-diene rubber (EPDM)
Implementation Method 4
a layer (13), which consists at least partially of a thermoset or a thermoplastic... the thermoset having a plastic resin system based on epoxy... Duroplasts or thermoplastics reinforced with fibers are characterized by high mechanical and thermal stability with a low specific weight
Data Source
AI summary
The invention relates to a composite component (10), characterised by the following layer structure a) a layer (11) that consists at least partially of polyethylene, b) a layer (12) that consists at least partially of an elastomer, c) a layer (13) that consists at least partially of a thermoset or thermoplastic, wherein layer (11) is arranged directly on layer (12) and wherein layer (12) is arranged directly on layer (13) and wherein a textile fabric (14) with rovings (15, 16, 17) is arranged between layers (12) and (13) such that some of the rovings (15) are completely embedded, at least in places, in layer (12), some of the rovings (16) are completely embedded, at least in places, in layer (13), and some of the rovings (17) are partially embedded, at least in places, in layer (12), and are partially embedded in layer (13).