Failure analysis of torque limiters in wind turbine couplings
SONG Jiangkai
WANG Yunlang
LÜ Wan
Abstract：[Objective]Slipping failure of the wind power coupling torque limiter could cause damage to the transmission system of wind turbines.The coupling torque limiter of a 5 MW unit was taken as the research object,and the key causes of its slipping failure were explored to provide support for improving reliability and unit stability.[Methods]A multi-dimensional analysis was adopted,combined with fault data,on-site disassembly results,and calibration test data.End torque was calculated,and speed matching and torque fluctuation were analyzed;the failure limiter was disassembled to inspect friction plate wear and structural defects;and calibration tests were conducted to study the influence of torque fluctuation and calibration methods.[Results]The main causes of failure include:unstable converter signals leading to excessive impact torque;the two-lobe cantilever structure causing uneven wear of friction plates;and inadequate torque control accuracy due to the calibration method.After optimization,the slipping problem can be effectively solved,and the service life and operational reliability were improved.
Keywords：Wind turbine couplingTorque limiterSlipping failureStructural optimization
Publication Date：2025-09-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 79-84 )