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设备的任一运行状态都具有一个固定的频谱。设备上的每一个运动部件在运转中都会产生具有一定频率的振动信号,每一个振动信号分别对应谱线中的峰值。当某个运动零件出现故障时,对应的峰值就会大幅度增高。因此,通过频谱分析可以迅速找出故障产生的原因和部位。我们采用北京测振仪器厂生产的BZ4200精密故障诊断仪,对25×3000毫米卷板机主减速机传动系统进行了诊断。该卷板机的主减速传动结构见图1。它的传动电机转速为 695r/min,经联轴器带动Ⅰ轴。齿轮1～6的齿数及其振动频率对应列于表1。
Any running state of the device has a fixed spectrum. Each moving part on the device will produce a vibration signal with a certain frequency during operation, and each vibration signal corresponds to a peak in the spectrum respectively. When a moving parts failure, the corresponding peak will be greatly increased. Therefore, by spectrum analysis can quickly find the cause and location of the fault. We use the BZ4200 precision fault diagnosis instrument produced by Beijing Vibration Instrument Factory to diagnose the drive system of the main reducer of 25 × 3000 mm bending machine. The main reducer drive plate structure shown in Figure 1. Its drive motor speed of 695r / min, driven by the shaft Ⅰ. The numbers of teeth of gears 1 to 6 and the vibration frequencies thereof are shown in Table 1.