风电机组轴承蠕动故障特征诊断与分析

Diagnosis and Analysis of Creep Fault Characteristics of Wind Turbine Bearings

  • 摘要: 通过提取时域波形和频谱特征对风电机组轴承蠕动故障进行诊断与分析。首先,基于正常状态下的时域波形和频谱特征建立对比分析标准;其次,针对3台风电机组轴承蠕动故障进行对比分析。研究发现,齿轮箱高速轴转频及其3倍振频的振动信号属于主要的故障特征。当故障发生时,有效值、峭度、峰值等振动特征指标呈现显著的突发性趋势裂化,超出正常数据的均值范畴。虽然该类故障特征与齿轮箱高速轴小齿轮断齿故障类似,但在时域、频谱方面存在明显区别。通过对风电机组轴承蠕动故障特征进行深入分析,旨在为该类故障的及时诊断和有效预防提供有益参考。

     

    Abstract: Diagnosis and analysis of bearing creep faults in wind turbines by extracting time-domain waveform and spectral features. Firstly, establish a comparative analysis standard based on the time-domain waveform and spectral characteristics under normal conditions. Secondly, a comparative analysis will be conducted on the creep faults of three types of wind turbine bearings. Research has found that the vibration signals of the high-speed shaft rotation frequency and its three times the vibration frequency of the gearbox are the main fault characteristics. When a fault occurs, vibration characteristic indicators such as effective value, kurtosis, and peak value show significant sudden trend cracking, exceeding the mean range of normal data. Although the characteristics of this type of fault are similar to those of gear box highspeed shaft small tooth breakage faults, there are significant differences in time domain and frequency spectrum. Through in-depth analysis of the characteristics of bearing creep faults in wind turbines, the aim is to provide useful references for timely diagnosis and effective prevention of such faults.

     

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