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Order tracking analysis for wind turbine planetary gearbox vibration based on meshing frequency and spectrum correction
Author(s): 
Pages: 324-330
Year: Issue:  2
Journal: Journal of Vibration Engineering

Keyword:  signal analysisspectrum correctionwind turbine gearboxinstantaneous meshing frequency estimationorder tracking;
Abstract: 克服风电齿轮箱输入转频能量低、输出转频混叠,难以直接提取转速信号的难点,提出了一种基于啮合频率和频谱校正的风电齿轮箱振动信号阶次跟踪方法.该方法利用能量重心法精确估计瞬时啮合频率,间接获得转速信号,进行阶次跟踪,提取风电齿轮箱的运行状态特征.仿真和工程应用结果验证了该方法的有效性和实用性.应用所提方法获得了正常风电齿轮箱振动信号的边频带特性:1)行星轮系的啮合频率同时被太阳轮和行星架的转频调制;2)定轴轮系啮合频率被输出轴的二倍频调制,双弹性支撑导致正常风电齿轮箱输出轴天然地存在轴不对中现象.
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