煤矿液压支架搬运车液压系统故障诊断方法

Fault Diagnosis Method of Hydraulic System of Hydraulic Support Truck for Coal Mine

煤矿液压支架搬运车液压系统在运行过程中容易出现故障,若处理不及时,会对煤矿开采工程的安全建设造成严重影响。针对这一问题,提出了一种新的液压系统故障诊断方法。根据液压支架搬运车液压系统的工作原理,建立液压系统故障诊断数学模型;提取液压系统故障时域信号特征,获取故障样本均值与方差;分析液压支架搬运车运行状态与运行模式,对液压系统故障进行全方位诊断。通过实验分析,该方法能够在短时间内快速完成故障诊断,且诊断结果的准确率在95.27%以上,可行性较高。

The hydraulic system of the hydraulic support truck for coal mine is prone to fault during operation,if the fault is not handled in time,it has a serious impact on the safety construction of coal mining projects.Aiming at this problem,a new fault diagnosis method of hydraulic system was proposed.According to the working principle of the hydraulic system of the hydraulic support truck,established a mathematical model for fault diagnosis of the hydraulic system;extracted the fault time domain signal characteristics of the hydraulic system,and obtained the mean and variance of the fault samples;analyzed the operating state and operation mode of the hydraulic support truck,and diagnoses the faults of the hydraulic system from omnibearing.Through the experimental analysis,this method can quickly complete the fault diagnosis in a short time,and the accuracy of the diagnosis results is above 95.27%,which is highly feasible.