Wind Turbine Blade Root Mounting Control Line
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Solution Overview
Problem
The increasing size and weight of wind turbine components pose challenges in transportation, erection, and maintenance, particularly due to the limitations of mobile crane lifting capacity and precision alignment issues, especially in harsh weather conditions and at sea.
Innovation Solution
A method involving a control line and a blade lifting crane to efficiently and safely attach large blades to a wind turbine rotor, allowing precise positioning and reducing the need for external cranes by using a single lifting point, with the control line providing positional control and the crane carrying the majority of the blade's weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If mobile cranes are used to lift wind turbine components, then lifting capacity and versatility are improved, but lifting height is limited and precise alignment becomes difficult
Solution Approach 1:
The lifting operation is divided into two independent functions: a crane handles the heavy lifting (force application) while a separate positioning system (cableway with carriers) handles the precise horizontal and vertical positioning. This segmentation allows each subsystem to optimize for its specific function without compromise.
Solution Approach 2:
A cableway system acts as an intermediary between the crane and the turbine components. The crane lifts components to the cableway, which then transports them horizontally to the turbine and vertically to the installation point, providing precise positioning control that the crane alone cannot achieve.
2Power
If larger and heavier wind turbine components are used, then energy conversion efficiency is improved, but handling and transport become more challenging
Solution Approach 1:
The handling system is segmented into a crane for heavy lifting and a cableway for precise positioning. This allows heavier components to be managed by dividing the operation into lifting (crane) and positioning (cableway) phases, making handling of larger components feasible.
Solution Approach 2:
The system adds a horizontal cableway dimension to the traditional vertical crane operation. Components are lifted vertically by the crane, then transported horizontally via the cableway to the turbine, and finally positioned vertically at the installation point, creating a multi-dimensional handling approach.
3Manufacturing precision
If assembly operations are performed at the wind turbine site, then component alignment is necessary, but resources and time are consumed for alignment and assembly
Solution Approach 1:
The cableway system serves as an intermediary that performs both positioning and assembly functions. It not only transports components to the turbine but also carries the installation tools and performs the actual bolting operations, eliminating the need for separate alignment and assembly resource deployments.
Solution Approach 2:
The cableway system is designed to perform multiple functions: horizontal transport of components, vertical positioning at the turbine, and even carrying installation tools for assembly operations. This multi-functionality consolidates multiple operations into a single system.
Data Source
AI summary
A method for mounting a blade root of a blade on a blade flange of a wind turbine rotor, the method comprising: attaching a control line between a hold structure at the blade flange and the blade root; lifting the blade with a blade lifting crane while the blade root is guided towards the blade flange by use of said control line, and connecting said blade root to said blade flange.