Profiled Protective Tape for Wind Turbine Rotor Blades
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Solution Overview
Problem
Conventional protective tapes for wind turbine rotor blades are inadequate in addressing the increasing forces and harsh erosion conditions, particularly during transportation and offshore installation, as they are not designed to withstand stronger forces and severe weather conditions.
Innovation Solution
A multilayer protective tape with a polymer film top layer and an adhesive bottom layer, featuring a cross-sectional profile with an outwardly curved or trapezoidal shape, where the inner section has a greater thickness than the lateral sections, providing enhanced protection against erosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional planar protective tapes are used, then the aerodynamic profile of the blade is maintained, but the protection against stronger forces and harsh erosion conditions is insufficient
Solution Approach 1:
The protective tape is designed with non-uniform thickness distribution, featuring a thicker inner section (at least 330 μm) compared to the lateral sections (at most 600 μm). This local variation in thickness provides enhanced protection where it is most needed while maintaining overall aerodynamic performance.
Solution Approach 2:
The invention changes the thickness parameter of the protective tape from uniform to non-uniform, creating a profile with an inner section having greater thickness than the lateral sections. This parameter modification enables the tape to withstand stronger forces and harsher erosion conditions.
2Strength
If the adhesive layer thickness is increased to provide better adhesion, then the bonding strength is improved, but the aerodynamic profile of the blade is negatively impacted
Solution Approach 1:
The adhesive layer thickness is varied locally, being thicker in the inner section to provide superior adhesion where the blade experiences highest stress, while remaining thinner at the lateral sections to preserve aerodynamic profile.
3Object-affected harmful factors
If the protective tape thickness is increased to withstand stronger forces, then the erosion resistance is improved, but the aerodynamic profile and blade performance are degraded
Solution Approach 1:
The protective top layer has non-uniform thickness with a thicker inner section (at least 330 μm) providing enhanced erosion resistance where needed, while thinner lateral sections (at most 600 μm) minimize impact on aerodynamic profile.
Solution Approach 2:
The thickness parameter of the protective tape is optimized with a non-uniform distribution, creating a balance between erosion resistance and aerodynamic performance by having greater thickness in the inner section and reduced thickness at the edges.
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 tape effectively protects rotor blades from erosion by distributing forces more evenly and providing a thicker, more durable surface that can withstand harsh environmental conditions, ensuring the longevity and performance of wind turbine blades.
Implementation Method 1
an adhesive bottom layer... The top layer has a continuous surface (S) that is outwardly curved or outwardly trapezoidal such that the tape has a cross-sectional profile
Data Source
AI summary
A multilayer protective tape for rotor blades of wind energy turbines is provided herein. The protective tape comprising a protective top layer comprising a polymer film, and an adhesive bottom layer. The top layer having a continuous surface (S) that is outwardly curved or outwardly trapezoidal such that the tape has a cross-sectional profile having an inner section between first and second edge lateral sections. The inner section comprises up to 30% of the width of the tape and has a thickness (Ti), while the first and second edge lateral sections have a thickness of T1 and T2, respectively, wherein Ti greater than each of T1 or T2, and the thickness (T1 or T2) of at least one edged lateral section is at most 600 μm and the thickness of the inner section (Ti) is at least 330 μm.Also provided is a method for applying the tape to rotor blades and a rotor blade protected by said protective tape.