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本文通过对许多实测资料的分析和理论论证得知:突然停泵后,压力降落值随时间变化的曲线,其前段是一条上凹下降型曲线,而后渐趋平缓。在此基础上:①提出了沿管线绘制(分析)最低水头线的模式图;②应用弹性水锤理论及数学分析方法,从理论上论证了求定最大总水头降的方法;③在前人的基础上,提出一整套绘制停泵间接水锤最低水头线的方法。
This article through the analysis of many measured data and theoretical proof that: suddenly stop the pump, the pressure drop value of the curve with time, the former is a concave downward curve, and then gradually flatten. Based on this: (1) Proposed a schematic diagram of drawing (analyzing) the minimum head line along the pipeline; (2) Applying the theory of elastic water hammer and mathematical analysis methods, theoretically demonstrating the method for determining the maximum total head drop; 3 Based on the above, a set of methods for drawing the lowest water head line of indirect water hammer for pump stop is proposed.