Wind Turbine Nacelle Elevator Suspension Mounting
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Solution Overview
Problem
Climbing ladders to access the nacelle of wind turbines is fatiguing, dangerous, and inconvenient, especially when transporting tools or equipment, as conventional lifting systems require additional ladder use after reaching the top of the tower.
Innovation Solution
A suspension device mounted to the nacelle allows the elevator car to be lifted directly to the nacelle level, eliminating the need for further ladder climbing, using a rope pulley, rack and pinion, or multiple suspension ropes for stabilization and control, with a driving device for lifting and descending, and a guiding rope for efficient energy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the service-lift travels to the top of the tower and stops at the tower top platform, then the lifting system reaches its maximum tower height, but additional ladders are still required to reach the nacelle which remains fatiguing and dangerous
Solution Approach 1:
Instead of mounting the suspension device to the tower top platform, the patent inverts the approach by mounting it directly to the nacelle. This allows the elevator car to be lifted past the tower top platform level and suspended at the nacelle level, eliminating the need for additional ladder climbing.
Solution Approach 2:
The patent extends the elevator system into a new vertical dimension by suspending the elevator car from the nacelle itself rather than from the tower top platform. This dimensional extension allows direct access to the nacelle level, transforming the accessibility problem from a multi-stage climb to a single continuous lift.
2Device complexity
If conventional lifting systems are used with the suspension device mounted to the tower top platform, then the system structure is simple, but technicians must still climb additional ladders to reach the nacelle
Solution Approach 1:
The patent inverts the mounting arrangement by attaching the suspension device to the nacelle rather than to the tower top platform. This inversion, while slightly increasing structural complexity, completely eliminates the safety hazard of requiring technicians to climb additional ladders after reaching the tower top.
3Ease of operation
If the suspension device is mounted to the nacelle, then the elevator car can be lifted directly to nacelle level eliminating further ladders, but the mounting structure becomes more complex
Solution Approach 1:
The nacelle serves multiple functions: it houses the driving mechanism and simultaneously acts as the mounting structure for the suspension device. This multi-functionality approach minimizes additional structural complexity while achieving the goal of direct nacelle access.
Solution Approach 2:
The patent merges the mounting function with the existing nacelle structure. Rather than adding a separate mounting platform or structure, the suspension device is integrated directly to the nacelle, combining structural elements and reducing overall system complexity.
Data Source
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AI summary
The invention describes an elevator system (100) for a wind turbine (140). The elevator system (100) comprises a suspension device (101) and an elevator car (102). The elevator car (102) is suspended to the suspension device (101) wherein the suspension device (101) is mountable to a mounting section (106) of a nacelle (120) of the wind turbine (140).