Segmented Blade Root Assembly for Transportable Wind Turbine Blades
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Solution Overview
Problem
The increasing dimensions of wind turbine blades pose challenges in manufacture and transportation due to height and width restrictions, and existing split manufacturing methods do not adequately address these issues, limiting the development of wind power generation devices.
Innovation Solution
A blade apparatus with a detachable blade root assembly composed of multiple segments, each with arc or cylindrical structures, allowing for assembly into a body of revolution, and featuring bolt connections and flange rings for secure attachment to the blade body and hub, enabling easier handling and adaptation to different dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the blade and blade root are formed integrally by infusion molding, then the structural strength is improved, but the manufacturing difficulty and transportation difficulty increase due to increased dimensions
Solution Approach 1:
The blade root assembly is divided into multiple blade root segments that can be manufactured separately and then assembled together to form the complete blade root. This segmentation allows each segment to be manufactured with standard molds, avoiding the need for large-scale infusion molding equipment while maintaining structural integrity through the connection structures between segments.
2Strength
If the blade and blade root are formed integrally by infusion molding, then the structural strength is improved, but the transportation difficulty increases due to height and width restrictions
Solution Approach 1:
By dividing the blade root into multiple segments, the overall dimension of the blade apparatus is reduced to fit within transportation restrictions. The segments are assembled on-site to form the complete blade root assembly, ensuring both transportation feasibility and structural strength.
3Adaptability or versatility
If the blade root dimension is increased to match larger blade bodies, then the adaptability to different blade dimensions is improved, but the transportation and manufacturing difficulties increase
Solution Approach 1:
The blade root assembly is segmented into multiple standardized components that can be combined in different configurations to match various blade body dimensions. This allows the same set of standardized segments to adapt to different blade sizes without requiring custom manufacturing for each blade dimension.
Solution Approach 2:
The blade root segments are designed as standardized, interchangeable components that can be used across different blade apparatus configurations. The connection structures are designed to accommodate various blade dimensions, making the same segments universally applicable to different blade sizes and types.
4Adaptability or versatility
If the blade root dimension is increased to match larger blade bodies, then the adaptability to different blade dimensions is improved, but the transportation difficulties increase due to height and width restrictions
Solution Approach 1:
The blade root is divided into multiple transportable segments that can be transported separately within size restrictions. These segments are then assembled on-site to form the complete blade root assembly with the required dimension to match larger blade bodies, thus achieving both adaptability and transportation feasibility.
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 design reduces manufacturing and transportation difficulties, allows for larger blade dimensions, enhances adaptability, and increases the swept area and output of wind power generation devices by enabling the use of standardized and interchangeable blade root segments.
Implementation Method 1
applying vacuum to a space covered by the vacuum cover
Implementation Method 2
infusing the connection region with a resin
Data Source
Figure 1
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Figure 5~7
AI summary
Provided is a blade apparatus for wind power generation, which includes: a blade body, one end thereof being provided with a blade-root connecting portion; and a blade root assembly, including a plurality of blade root segments arranged in a circumferential direction of the blade body to form a body of revolution, each blade root segment being detachably connected to a corresponding portion of the blade-root connecting portion. The blade root assembly with a plurality of blade root segments is adopted, so that the dimension of a single blade root segment is greatly reduced, thus effectively reducing the difficulties in manufacture and transportation. Meanwhile, the overall dimension of the blade root assembly can be further increased to match with a larger blade bodies, which is beneficial to further improve the swept area of blade and generated output of wind power generation device.