液压闸阀卡滞现象的机理分析与试验研究

Mechanism analysis and experiment on stuck malfunction of hydraulic gate valve

针对某型液压闸阀出现的卡滞现象进行研究,分析该液压闸阀结构特征,预测影响闸阀卡滞的因素,进而根据船用液压驱动源压力波动特性,对闸阀的启闭特性进行理论计算和分析,获取该型闸阀在波动驱动压力下的启闭特性曲线,校核了设计的合理性;通过对闸阀零件实际加工尺寸进行检查和分析,找到了影响闸阀启闭状态的关键配合尺寸.最后模拟实船系统搭建相应试验台,复现了该闸阀卡滞现象,通过对影响闸阀启闭的配合尺寸进行控制,试验表明修复后的闸阀功能正常,适应船用波动驱动压力环境,同时验证了闸阀计算分析结果的合理性.

Stuck malfunction occurred in an inlet hydraulic gate valve is investigated. The structural characteristics of the gate valve are briefly explained and the potential factors causing the stuck mal- function are examined. Based on pressure fluctuation features of the marine hydraulic pressure drive, the opening and closing characteristics of the gate valve are calculated and analyzed. The validity of the design is substantiated with the obtained opening and closing characteristic curves associated with fluctuating pressure. The dimensions of the gate valve parts are examined and the most pivotal dimen- sion influencing the opening and closing characteristics of the gate valve is extracted. The test stand simulating a practical ship system is built and the stuck malfunction of the gate valve is reproduced. The gate valve operates well as the pivotal dimension is appropriately controlled, and the fidelity of the results obtained through the employed calculation, adapting to the pressure environment of ship fluctua- tion, and analysis methods is confirmed as well.