应用振动、噪声信号频谱分析和相干函数分析技术,从理论上说明变速箱故障诊断的依据。检测了一台噪声严重超标的变速箱系统,得到其三向振动和噪声信号。综合分析了实测信号及其计算机数据处理结果,从而得出检测对象出现强烈噪声的主要原因是在于其中一对啮合轮发生“磕碰”。 Applying vibration, spectrum analysis of noise signal and coherence function analysis technology, the basis of gearbox fault diagnosis is explained theoretically. A gearbox system with severe noise level was detected and its three-way vibration and noise signal was obtained. A comprehensive analysis of the measured signal and its computer data processing results, resulting in a strong noise test object is mainly due to one of a pair of meshing wheel “bump.”