Blade Root Load Detection via Barrel Nut Sensors
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Solution Overview
Problem
Wind turbines face significant damage due to high loads transmitted through the blade root, leading to bending and twisting of the hub and main shaft, which existing technologies fail to effectively detect and control.
Innovation Solution
A system and method utilizing sensors mounted within the barrel nut and root bolt of the root attachment assembly to detect loads and transmit signals to a controller, which adjusts operational parameters, such as pitch angle, to mitigate these loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors are installed in the root attachment assembly to detect loads, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent uses the root attachment assembly components (barrel nut and root bolt) as intermediaries to transmit load information to sensors. The sensors are integrated into the existing root attachment structure, allowing load detection without adding separate complex measurement systems. The barrel nut and root bolt serve as both structural elements and load transmission paths for the sensing system.
2Reliability
If active load control is implemented by adjusting operational parameters, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback control system where sensors continuously monitor loads in the root attachment assembly and transmit signals to a controller. The controller processes this information and adjusts operational parameters (such as pitch angle or power output) to maintain loads within safe limits. This closed-loop feedback mechanism protects components from excessive loads while enabling adaptive operation.
Solution Approach 2:
The wind turbine system performs self-protection by using its own operational parameters (pitch, power) to control loads. When excessive loads are detected, the system automatically adjusts its operation to reduce loads, eliminating the need for external intervention or complex mechanical protection devices. The turbine regulates itself based on real-time load conditions.
Data Source
AI summary
In one aspect, a system for detecting loads transmitted through a blade root of a rotor blade of a wind turbine is disclosed. The system may include a root attachment assembly configured to couple the blade root to a hub of the wind turbine. The root attachment assembly may include a barrel nut mounted within a portion of the blade root and a root bolt extending from the barrel nut. In addition, the system may include a sensor associated with the root attachment assembly. The sensor may be configured to detect loads transmitted through at least one of the barrel nut and the root bolt.