Jointed Rotor Blade Tip Suspension for Crane-Free Servicing
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Solution Overview
Problem
The servicing of segmented rotor blades in wind turbines is complex, expensive, and time-consuming due to the need for large ground cranes to remove and replace tip sections, which is exacerbated by the increasing size of rotor blades.
Innovation Solution
A method and system that involves positioning the rotor blade in a six o'clock position, securing a blade tip support element to the tip section, coupling a lifting line between the lift-support element and the blade tip support element, and separating the tip section from the root section to suspend it above the support surface for servicing, which includes installing, inspecting, or repairing the tip section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If large ground cranes are used to remove and replace tip sections, then the rotor blade can be serviced, but the process becomes complex, expensive, and time-consuming
Solution Approach 1:
The rotor blade is divided into separate sections (root section and tip section) that can be independently serviced. The tip section can be detached and reattached without requiring removal of the entire blade, enabling localized maintenance operations.
Solution Approach 2:
The wind turbine performs its own blade servicing operations using integrated lifting mechanisms and positioning systems. The blade sections can be manipulated and repositioned using the turbine's own structural components rather than external heavy equipment.
2Ease of repair
If large ground cranes are used to remove and replace tip sections, then the rotor blade can be serviced, but costs and time increase
Solution Approach 1:
The blade is pre-configured with attachment points, lifting mechanisms, and structural features that enable quick detachment and reattachment of tip sections. These preliminary preparations allow servicing operations to proceed rapidly without requiring complex setup or specialized equipment.
3Productivity
If rotor blades increase in size for improved power generation, then energy efficiency increases, but manufacturing, transportation, and handling difficulties increase
Solution Approach 1:
Large rotor blades are constructed as assemblies of smaller, more manageable sections. The tip section can be manufactured separately and attached to the root section, avoiding the need to manufacture, transport, and handle extremely large monolithic blade structures.
4Ease of manufacture
If segmented rotor blades are used to manage size, then manufacturing and transportation become easier, but joints require periodic servicing
Solution Approach 1:
The joint and tip section assembly is designed to be self-servicing through integrated lifting points, attachment mechanisms, and positioning features. The structure enables its own maintenance operations without requiring external heavy equipment or complex servicing procedures.
Data Source
AI summary
A method is provided for servicing a jointed rotor blade of a wind turbine. The jointed rotor blade is positioned in a six o'clock position and a blade tip support element is secured to a tip section of the jointed rotor blade. A lift-support element is secured at a mounting location above the blade tip support element. A lifting line is coupled between the lift-support element and the blade tip support element. The tip section is separated from the root section of the jointed rotor blade such that the tip section is suspended above a support surface of the wind turbine via the blade tip support element and the lifting line. The tip section of the jointed rotor blade is serviced.