水轮泵在水里工作,运行监视困难。出现故障后,往往迟至停止转动才发现,此时部件已严重损坏。1979年广西宜山县水电局研制成了一种报警器,经模拟试验和实际运行一年余,达到了设计要求,并已通过鉴定。警报器的工作原理见图1,当水轮泵发生故障时(如吸水不畅,叶轮或转轮被杂物卡塞,轴承磨损),出水量减少,出水管内动水压力下降,敷设于管 Water pump work in the water, operation monitoring difficulties. After the failure, it is often found as late as possible to stop rotating and the parts have been severely damaged. In 1979, Guangxi Yishan County Hydropower Bureau developed a kind of alarm device. After more than a year of simulation test and actual operation, it met the design requirements and passed the appraisal. The working principle of the alarm is shown in Figure 1, when the hydraulic pump fails (such as poor water absorption, the impeller or runner is jammed by debris, bearing wear and tear), reducing the amount of water out of the water pipe moving water pressure drop laying in the pipe