Wind Turbine Hub Platform for Safe Maintenance Access
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Solution Overview
Problem
Maintenance and repair work in the hub area of wind turbines is risky and complex due to the need for personnel to navigate a curved, narrow space with high fall distances, requiring extensive safety harnesses and lines, which can restrict movement and increase costs.
Innovation Solution
A safety device comprising a platform with horizontal contact surfaces fixed to the hub and rotor housing, providing a stable working area that rotates with the rotor, reducing fall risks and allowing unhindered access to rotor blades for inspection and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If personnel use mobile scaffolding and safety belts to work in the hub area, then they can access the maintenance area, but the fall distances are high and the safety risk increases
Solution Approach 1:
The maintenance space is segmented into multiple levels with platforms at different heights, allowing personnel to work at elevated positions without the need for extensive safety harnesses and lines. The platform structure divides the maintenance area into manageable zones with reduced fall risks in each segment.
Solution Approach 2:
The platform extends radially outward from the hub, creating a new working dimension that projects maintenance personnel away from the high-risk hub center area. This radial extension provides stable contact surfaces at optimal distances from the hub, reducing fall distances while maintaining access to all maintenance points.
2Ease of operation
If personnel work on the curved surface of the hub, then they can reach maintenance points, but slipping risk increases due to the curved surface
Solution Approach 1:
The platform provides localized horizontal contact surfaces at specific radial distances from the hub, creating stable standing areas with optimal friction characteristics. These localized platforms are positioned to provide both stability and access to maintenance points, eliminating the need to work directly on the curved hub surface.
3Reliability
If safety harnesses and safety lines are used to secure personnel, then fall protection is provided, but movement is restricted and operational efficiency decreases
Solution Approach 1:
The platform acts as an intermediary structure between the hub and the personnel, providing a stable intermediate working surface that eliminates the need for direct safety harness attachment to moving parts. This intermediary platform allows free movement while maintaining fall protection through its fixed structure.
4Volume of moving object
If the maintenance space is narrow between the hub and rotor housing, then the structure is compact, but the complexity of securing personnel increases
Solution Approach 1:
The platform merges multiple functions into a single structure: it provides working surfaces, fall protection, and access pathways simultaneously. By combining these functions into one integrated radial extension, the system reduces the overall complexity of the securing apparatus while maintaining all necessary safety and access functions.
Data Source
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AI summary
The invention relates to a safety device (19) for ensuring the safety of an operator (16), said device being arranged in a rotor (1), in particular of a wind turbine. The device comprises a platform (20) with a number of standing surfaces (32), at least one of said standing surfaces (32) being substantially horizontal when the safety device (19) is used as intended, and also comprising a securing system (18, 28) for securing the platform (20) to a hub (3) of the rotor (1) and/or to an inner face (14) of a rotor housing (12) of the rotor (1).