Wind Turbine Blade Maintenance Device with Magnetic Actuation
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Solution Overview
Problem
Existing blade maintenance devices for wind turbines face challenges in stabilly traversing the blade and effectively cleaning and deicing the entire outer surface, particularly due to limitations in design that affect rigidity and balance, restricting maintenance to specific areas like the leading edge.
Innovation Solution
A blade maintenance device with a body that travels along the leading edge, supported by extendable units with rollers and sensors for stability, and equipped with cleaning and deicing units that include rotating brushes, blower fans, and heaters to address the entire outer surface of the blade.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the driving instrument is installed inside the blade to move the brush along the leading edge, then the brush can be driven to clean the leading edge, but the movement space inside the blade is limited and slits must be formed in the leading edge which degrades blade rigidity
Solution Approach 1:
The patent introduces an intermediary magnetic field interaction mechanism between the driving instrument inside the blade and the brush outside the blade. The driving instrument generates a magnetic field that acts on the brush through the blade material, enabling force transmission without physical contact or slits in the blade, thus maintaining blade rigidity while achieving brush movement for cleaning.
Solution Approach 2:
The patent replaces the traditional mechanical connection system (requiring slits and physical linkages) with a magnetic field-based actuation system. The driving instrument uses electromagnetic or magnetic forces to move the brush along the leading edge without mechanical contact through the blade structure, eliminating the need for slits and preserving blade strength.
2Device complexity
If the cleaning device is limited to the leading edge with internal driving instrument, then the structure is simplified, but the cleaning area is restricted and cannot clean the entire outer side of the blade
Solution Approach 1:
The patent designs the maintenance device with multi-functional capabilities where the same platform can perform cleaning, inspection, and deicing operations across different areas of the blade. The device can transition between leading edge maintenance and outer side maintenance functions, making it universally applicable to various blade surfaces without requiring separate specialized devices.
Solution Approach 2:
The patent employs dynamic positioning mechanisms that allow the maintenance device to adapt its configuration. The support legs can extend and retract, and the device can switch between being supported by the blade body (for leading edge work) and being supported by the support legs (for outer side work), enabling versatile cleaning coverage while maintaining structural simplicity.
3Device complexity
If the device uses only wing parts for balance while traveling along the leading edge, then the structure is simple, but the traveling stability is insufficient for reliable maintenance operations
Solution Approach 1:
The patent divides the support system into multiple independent segments: the main body, extendable support legs, and wing parts. Each segment can function independently or in combination, providing modular stability. The support legs can be extended to provide additional support points on the outer side of the blade, while wing parts provide lateral stability, creating a segmented support architecture that enhances traveling stability without excessive complexity.
4Ease of manufacture
If workers perform maintenance directly on the blade at high altitude, then the maintenance can be performed with simple equipment, but the working environment is dangerous and poor
Solution Approach 1:
The patent designs an autonomous maintenance device that performs cleaning, inspection, and deicing operations without requiring worker presence on the blade. The device travels independently along the blade, executes maintenance tasks automatically or semi-automatically, and returns to base, eliminating human exposure to dangerous high-altitude conditions while maintaining effective maintenance capabilities.
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
Enables stable traversal and comprehensive maintenance of the blade's outer surface, including effective cleaning and deicing across the entire length, improving safety and efficiency by allowing remote operation and addressing the limitations of prior devices.
Implementation Method 1
a heater (306) installed within the blower flow path so as to heat air of the blower flow path
Implementation Method 2
a blower fan (304) installed within the blower flow path so as to blow air toward the outlet of the blower flow path
Implementation Method 3
a cleaning brush that is rotatably installed at a lower part of the body so as to clean the blade leading edge
Data Source
AI summary
Provided is a blade maintenance device for a wind turbine. The blade maintenance device for the wind turbine includes: a body that travels along a leading edge of a blade; support units that extend from the body to both sides of the blade and support the sides of the blade; and a maintenance unit installed at at least one of the body and the support units so as to perform maintenance of an outer side of the blade.