Wind Turbine Blade Tip Extension Push-Fit Lightning Connector
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Solution Overview
Problem
The installation of blade tip extensions on wind turbines is technically challenging due to the difficulty in accurately and reliably connecting the lightning protection systems of the tip extensions to the existing blade systems, especially when performed in harsh conditions by operators at height.
Innovation Solution
A wind turbine blade assembly with a push-fit connection system between the blade tip connector and the tip extension connector, allowing for a plug-and-socket connection that aligns and connects the lightning receptors of the tip extension to the blade's lightning protection system without the need for manual intervention or large access holes, using a connector plate and bolts for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional connection methods are used to connect lightning receptors, then electrical connection is achieved, but the installation process becomes complex and difficult
Solution Approach 1:
The patent combines the mechanical connection and electrical connection functions into a single integrated connector assembly. The connector includes both mechanical fastening elements (bolts, clips) and electrical contact elements (conductors, contact points) that work together as one unit, eliminating the need for separate mechanical and electrical connection steps and reducing overall installation complexity.
Solution Approach 2:
The connector is designed to perform multiple functions simultaneously: it provides mechanical attachment between the blade and tip extension, establishes electrical continuity for the lightning protection system, and aligns the components during installation. This multi-functional design simplifies the installation process by consolidating multiple operations into a single component.
2Manufacturing precision
If manual intervention is required for connecting lightning receptors, then precise alignment can be achieved, but installation time and difficulty increase
Solution Approach 1:
The connector is pre-assembled with the electrical contacts and mechanical fastening elements positioned in their correct locations before installation. The alignment features are built into the connector structure itself, so that when the connector is attached to the blade, the electrical contacts are automatically positioned correctly without requiring manual alignment during the installation process.
Solution Approach 2:
The connector incorporates self-aligning features such as guide pins, tapered surfaces, or keyed interfaces that automatically position the electrical contacts in the correct alignment with the blade's lightning receptor during installation. This self-alignment mechanism eliminates the need for manual intervention to achieve precise alignment, allowing operators to simply attach the connector without specialized alignment skills.
3Ease of operation
If large access holes are created in the tip extension, then connection access is improved, but structural integrity is compromised
Solution Approach 1:
The patent extracts the connection access requirement from the tip extension structure itself by providing access through the blade's existing structure or through small openings in the connector housing. The electrical connections are made through the blade's skin or existing access points rather than requiring large holes in the tip extension, thereby maintaining the tip extension's structural integrity while still allowing necessary access for connection.
Solution Approach 2:
The connector acts as an intermediary component that facilitates electrical connection without requiring direct access to the interior of the tip extension. The connector interfaces with the blade's lightning protection system through the blade's existing structure, and then internally connects to the tip extension's lightning receptor through sealed or minimally invasive pathways, avoiding the need for large access holes that would compromise structural integrity.
Data Source
Figure 1
Figure 2
Figure 3~3a
AI summary
A wind turbine blade assembly is described, which comprises a wind turbine blade and a tip extension fitted to the blade. A blade lightning protection system including a blade tip receptor block is provided inside the blade. A blade tip connector is mounted to an end surface of the blade. The tip extension includes one or more lightning receptors and a tip extension connector is provided inside the tip extension. The blade tip connector and the tip extension connector are arranged such that when the tip extension is fitted to the blade, the connecters are mutually aligned and form a push-fit connection inside the tip extension. A tip extension including a connector is also described together with a method of fitting the tip extension to the blade.