液压支架泄漏检测方法的分析与实践

Analysis and practice of detection method on hydraulic powered support leak failures

对液压支架产生故障的主要形式进行了统计和总结,并对故障产生的主导因素进行了分析,得出大多数故障的产生都是由泄漏引起的;根据液压支架泄漏特点提出了通过检测泄漏产生的高频声波实现故障检测和准确定位的支架故障检测原理,运用概率论的方法得出了信号检测接收机的表达式,并成功研制了新型支架液压泄漏检测仪。液压泄漏检测的现场实践表明,该仪器能适应煤矿现场的复杂条件,不但能检测出液压支架外部泄漏的故障部位,而且还能检测出人用直观方法不能检查出的内部泄漏、串液等故障,提高了故障检测成功率,实现了井下支架泄漏故障的无损伤检测。

The main forms of support failures were collected and analyzed, and the main reason for failures was leakage of high pressure liquid. According to the high-frequency character of leak signals, the detection theory was put forward, that is the failures and its positions could be found by detecting the high-frequency leak signals. And then the signal receiver was drawn out by using the method of probability theory. Based on the theory, the detector of leak failures was developed. The practice of the detector shows that it can adapt to the complex conditions and works well, its accuracy to find failures is higher than direct method.