Wind Turbine Rotor Blade Segmented Manufacturing via 3D Printing
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Solution Overview
Problem
Conventional wind turbine rotor blade manufacturing methods are costly, labor-intensive, and inefficient, with high tooling expenses and low throughput, and existing blades lack sufficient stiffness and buckling resistance to withstand operational loads.
Innovation Solution
The method involves using CNC technology to print leading and trailing edge segments onto flat surfaces of a rotor blade structure, securing fiber-reinforced outer skins, and optionally incorporating shear webs and spar caps, allowing for customized structural reinforcement and aerodynamic features, reducing the need for adhesives and enhancing stiffness and buckling resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional molding processes are used to form rotor blade shells, then the shells can be produced with basic structural properties, but the production cost is high, labor costs are high, and throughput is slow
Solution Approach 1:
The rotor blade is divided into multiple segments (root segment, intermediate segments, tip segment) 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 molding operation.
Solution Approach 2:
The patent replaces conventional mechanical molding processes with a hybrid approach combining 3D printing for structural components (spar caps, shear webs) and molding for shell segments. This substitution reduces labor-intensive operations and accelerates production while lowering tooling costs through the versatility of additive manufacturing.
2Manufacturing precision
If expensive customized blade molds are used for manufacturing, then manufacturing precision can be achieved, but tooling costs are high and utilization is low
Solution Approach 1:
By segmenting the blade into standardized modules with consistent interface geometries, the patent enables the use of simpler, less expensive molds for each segment while maintaining overall precision through precise joining of segments. This reduces the need for highly complex, expensive custom molds.
Solution Approach 2:
The patent develops universal mold components and standardized segment designs that can be reused across different blade configurations. The modular approach allows the same basic tooling to produce various blade types by changing only the segment arrangements, dramatically increasing tooling utilization and reducing per-unit tooling costs.
3Weight of moving object
If the shell is made lightweight for aerodynamic efficiency, then aerodynamic performance is improved, but the shell lacks sufficient stiffness and buckling resistance to withstand operational loads
Solution Approach 1:
The patent employs composite materials throughout the structure, including fiber-reinforced polymers for shell segments and specialized composite formulations for 3D-printed structural components. These composites provide high strength-to-weight ratios, enabling the shell to remain lightweight while the integrated spar caps and shear webs provide the necessary stiffness and buckling resistance.
Solution Approach 2:
The patent merges the shell structure with integrated structural elements (spar caps, shear webs, ribs) to create a unified load-bearing system. The shell is not merely a lightweight covering but is structurally integrated with the internal framework, allowing the lightweight shell to benefit from the combined structural system's enhanced stiffness and buckling resistance.
4Productivity
If modular segment assembly is used to increase productivity, then throughput is improved, but the complexity of assembling multiple segments increases
Solution Approach 1:
The patent standardizes the interface geometries, joining methods, and structural configurations across all blade segments. This homogenization of segment designs creates uniform assembly procedures that, while involving multiple steps, follow predictable patterns reducing the effective complexity compared to custom-fit assembly approaches.
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, more automated production with reduced tooling costs, customizable blade designs, and improved structural integrity, allowing for tailored buckling resistance and aerodynamic performance.
Implementation Method 1
printing, via a computer numeric control (CNC) device, a leading edge segment of the rotor blade onto the first surface, wherein the leading edge segment bonds to the first surface as the leading edge segment is being deposited
Data Source
AI summary
The present disclosure is directed to methods for manufacturing wind turbine rotor blades and components thereof, e.g. using 3D printing. In one embodiment, the method includes forming a rotor blade structure having a first surface and an opposing, second surface, the first and second surfaces being substantially flat. Another step includes printing a leading edge segment of the rotor blade onto the first surface, wherein heat from the printing bonds the leading edge segment to the first surface. The method also includes rotating the rotor blade structure having the leading edge segment attached thereto. A further step includes printing a trailing edge segment of the rotor blade onto the second surface, wherein heat from the printing bonds the trailing edge segment to the second surface. Another step includes securing one or more fiber-reinforced outer skins to the leading and trailing edge segments so as to complete the rotor blade.