Wind Turbine Rotor Blade Segments Seamless Leading Edge
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Solution Overview
Problem
Conventional wind turbine rotor blade manufacturing is costly, labor-intensive, and inefficient, with high tooling expenses and limited customization options, leading to suboptimal structural properties such as stiffness and buckling resistance.
Innovation Solution
The method involves using automated deposition technologies like 3-D Printing and additive manufacturing to create rotor blade segments with a seamless leading edge, allowing for customized designs with varying curvatures and structural reinforcement patterns, eliminating the need for adhesives and reducing tooling costs through the use of thermoplastic and thermoset materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional molding processes are used to manufacture rotor blades, then structural properties such as stiffness and buckling resistance can be achieved, but manufacturing costs are high, labor costs are high, and production throughput is slow
Solution Approach 1:
The rotor blade is divided into multiple segments that can be manufactured separately and then assembled. This segmentation enables parallel production of multiple segments, significantly increasing throughput while reducing the complexity and cost of each individual manufacturing process. The blade is divided into a root section, one or more intermediate segments, and a tip section, each with specific structural characteristics optimized for its location.
Solution Approach 2:
The intermediate segments are designed to be nested between the root section and tip section, with the ability to assemble multiple segments in a hierarchical manner. This nesting approach allows for efficient storage, handling, and assembly of blade components, reducing manufacturing complexity and enabling modular production that improves throughput while controlling costs.
2Adaptability or versatility
If conventional molding processes are used to manufacture rotor blades, then structural reinforcement can be achieved, but tooling costs are high and customization options are limited
Solution Approach 1:
Segmenting the blade into modular sections allows each segment to be independently designed and manufactured with different structural configurations, material compositions, and reinforcement patterns. This modularity enables customization for different wind conditions, blade lengths, and performance requirements without requiring expensive custom tooling for each variation.
Solution Approach 2:
The standardized interface designs and common structural elements across different blade segments and models allow a single tooling setup to produce multiple blade configurations. The modular architecture enables the same manufacturing equipment to produce various blade types by simply changing the segment designs, not the fundamental tooling, thereby reducing tooling costs while increasing adaptability.
3Strength
If bond lines are used to join shell halves in conventional manufacturing, then assembly is simplified, but structural strength and reliability are reduced
Solution Approach 1:
The method merges the shell formation and structural reinforcement into a single integrated process. The shell is formed and then folded back upon itself, with reinforcement structures embedded within the folded configuration. This eliminates the need for separate bonding operations and creates a unified structural assembly that is both stronger and simpler to manufacture than conventional bonded assemblies.
Solution Approach 2:
The folded shell configuration acts as an intermediary structure that mechanically interlocks the leading edge and trailing edge portions. Instead of relying on adhesive bond lines, the folded geometry creates inherent mechanical interlocking and load transfer paths, providing superior structural strength while eliminating the complexity of bonding operations.
4Productivity
If fiber fabrics are stacked and infused in shell molds, then composite structures can be formed, but manufacturing time is long and labor costs are high
Solution Approach 1:
The shell is pre-formed as a complete structure before the folding operation. This preliminary formation of the entire shell geometry allows subsequent folding and assembly operations to be performed more efficiently with less manual intervention. The pre-formed shell can be automatically handled, positioned, and folded using robotic systems, thereby increasing automation and reducing both time and labor costs.
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 enables faster production, reduced tooling costs, improved structural customization, and enhanced stiffness and buckling resistance, allowing for optimized load distribution and shedding during extreme events.
Implementation Method 1
heating the generally flat fiber-reinforced outer skin and folding the fiber-reinforced outer skin about the seamless leading edge surface
Data Source
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AI summary
A rotor blade segment of a wind turbine includes a seamless leading edge surface. A method of manufacturing a rotor blade segment of a wind turbine, the rotor blade segment having a seamless leading edge surface, includes forming an outer skin of the rotor blade segment. The outer skin defines a continuous outer surface. The continuous outer surface includes a pressure side surface extending between a pressure side aft edge and a pressure side forward edge, a suction side surface extending between a suction side forward edge and a suction side aft edge, and the seamless leading edge surface extends between the pressure side forward edge and the suction side forward edge. After folding the outer skin, the pressure side surface is positioned opposite the suction side surface and the pressure side aft edge is proximate the suction side aft edge.