加速度传感器的振动筛螺栓松动故障诊断系统

Fault Diagnosis System for Bolt Loosening in Vibrating Screen Based on Acceleration Sensor

针对GLS10型直线振动筛弹簧紧固螺栓松动故障,结合软件LABVIEW和NIUSB-6363数据采集卡,构建一种基于加速度传感器的振动筛螺栓松动故障诊断系统。通过拧松固定螺栓个数的方法,模拟振动筛弹簧悬臂梁固定端松动故障。结果表明:当振动筛悬梁臂固定端松动时,其最大振幅明显减小,其幅度为原先幅值的53%,可以有效判断故障类型;当故障类型相同、故障程度不同时,分析得到的加速度信号图谱互不相同,且振幅差异明显,可根据振幅的阈值来判断螺栓松动的故障程度。

A vibrating screen bolt loosening fault diagnosis system based on acceleration sensors is constructed by combining LABVIEW software and NIUSB-6363 data acquisition card for the GLS10 linear vibrating screen spring fastening bolt loosening fault.The loosening fault of the fixed end of the vibrating screen spring cantilever beam was simulated by changing the number of loosening bolts.The results show that when the fixed end of the suspension arm of the vibrating screen is loose,its maximum amplitude significantly decreases to 53%of the original amplitude,which can be used to effectively determine the fault type.When the fault type is the same but with various degrees,the acceleration signal spectra obtained varies,and the difference of amplitude is significant,the fault degree of bolt loosening can be determined based on the threshold of the amplitude.