如何从滑动轴承包络谱看故障(HHT解调轴承座上水平和垂直振动号)
1.介绍分别用EMD分解滑动轴承支座上水平和垂直方向的振动信号,让后分别用Hilbert解调前三个IMF分量的包络谱。ax1-ax3——水平方向振动信号前三个IMF分量的包络谱;
ay1-ay3——垂直方向振动信号前三个IMF分量的包络谱;
由于是预科生,暂时还不能上传照片,只有将图谱中谱线结构和幅值做成表格的形式。
注:基频为50Hz
ax1谱线结构及其幅值/um*s-1
6.25Hz,0.3318;14Hz,0.2681;18.75Hz,0.2251;25Hz,0.4073;31.25Hz,0.2848;50Hz,0.4201;75Hz,0.2245;
ay150Hz,2.582;100Hz,0.7821;150Hz,0.2333;
ax24.688Hz,0.6579;17.19Hz,0.5645;26.56Hz,0.397;50Hz,0.2957;75Hz,0.2754;
ay26.25Hz,0.399;25Hz,0.7048;75Hz,0.2123;
ax34.688Hz,0.1827;7.813Hz,0.2078;14.06Hz,0.2282;25Hz,0.3201;31.25Hz,0.1998;50Hz,0.0952;
ay34.688Hz,0.3341;7.813Hz,0.2799;12.5Hz,0.4005;17.19Hz,0.1944;21.88Hz,0.3094
从表中可以看出,水平和垂直方向的包络谱差异较大(为什么差异这么大),请帮忙分析两个方向各包络谱对应的故障类型。
多谢!
预计要用包络诊断滑动轴承的什么故障?为什么想起来做这个? 碰摩故障和摩擦故障
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