Wind Turbine Blade Maintenance Crawler System
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Solution Overview
Problem
Manual inspection and cleaning of wind turbine blades are time-consuming and difficult, and existing automated solutions do not fully address the need for efficient maintenance on non-level surfaces.
Innovation Solution
An automated apparatus comprising a wheeled cart with holonomic-motion crawler vehicles suspended by cables, capable of performing maintenance operations such as non-destructive inspection, drilling, and cleaning on wind turbine blades by scanning both sides of the blade with adjustable elevation and motion, allowing for full coverage and reduced labor and safety risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual inspection and cleaning methods are used, then flexibility and adaptability to complex blade geometries are maintained, but maintenance time and labor requirements increase significantly
Solution Approach 1:
The maintenance system is divided into multiple independent crawler vehicles, each capable of autonomous movement and equipped with specific maintenance tools. This segmentation allows parallel operation on different blade sections, significantly increasing productivity while keeping each individual unit relatively simple in structure.
Solution Approach 2:
The crawler vehicles are designed with universal capabilities to perform multiple maintenance functions including inspection, cleaning, and repair operations. This multi-functionality reduces the need for multiple specialized systems, improving productivity without proportionally increasing overall system complexity.
2Productivity
If automated maintenance systems are implemented, then maintenance time is reduced, but the ability to handle non-level surfaces and complex blade geometries becomes more difficult
Solution Approach 1:
The crawler vehicles employ dynamic suspension systems with adjustable cable lengths that allow real-time adaptation to non-level surfaces and varying blade geometries. This dynamic capability enables the automated system to maintain contact and perform maintenance efficiently on complex surfaces without sacrificing adaptability.
Solution Approach 2:
The system changes key parameters including cable tension, cable length, and crawler positioning to adapt to different surface conditions. These parameter adjustments allow the automated maintenance system to handle non-level surfaces effectively while maintaining high productivity.
3Measurement precision
If comprehensive blade coverage is achieved, then inspection accuracy improves, but the time required to complete maintenance operations increases
Solution Approach 1:
Multiple crawler vehicles operate simultaneously on different blade sections, each performing comprehensive inspection and maintenance. This parallel segmented operation achieves full blade coverage with high inspection accuracy while reducing total maintenance time compared to sequential single-vehicle operation.
Solution Approach 2:
The system maintains continuous inspection and maintenance operations across the entire blade surface through coordinated multi-vehicle movement. This continuous coverage ensures no areas are missed (improving accuracy) while the parallel operations prevent idle time (reducing total duration).
Data Source
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AI summary
Apparatus and methods for the automated non-destructive inspection of wind turbine blades. In one embodiment, the automated apparatus (80) includes: a cart (18) comprising a cart frame (24), a multiplicity of wheels (26), and a cart motor (62) for driving rotation of at least one wheel (26); a multiplicity of cables (22) depending from the cart (18); a multiplicity of crawler vehicles (20) respectively attached to the multiplicity of cables (22), each crawler vehicle (20) comprising a crawler vehicle frame (2) and a set of wheels (4); and a multiplicity of maintenance tools (28) respectively coupled to the crawler vehicle frames (2) of the multiplicity of crawler vehicles (20). The crawler vehicles (20) are equipped with suction devices (10) to enable adherence to the surface and may be configured for holonomic motion during such adherence.