气囊式空气罐水锤防护研究

Research on water hammer protection of pneumatic tank

根据气囊式空气罐的工作原理,推导了水泵掉电情况下气囊式空气罐的涌浪周期及压力波动理论公式,并与常规空气罐进行了对比,分析了不同参数对气囊式空气罐水锤防护性能的影响,给出了气囊式空气罐过渡过程数学模型。结合某长距离输水工程实例,利用过渡过程数值仿真,对气囊式空气罐与常规空气罐的水锤防护效果进行了对比。结果显示气囊式空气罐能够有效缓解长距离输水工程中的停泵水锤,且其防护性能优于常规空气罐。

According to the w orking principle of pneumatic tank, the surge cycle and pressure fluctuat ion formulae of the pneu-matic t ank w ere deduced under the circumstance of pow er-off pumping. Compared w ith the ordinary air tank, the effects of dif-ferent paramet ers on the performance of w ater hammer protection for pneumatic tank w ere analyzed, and the mathematical mod-el of the pneumat ic tank in transit ion period w as developed. Combined w ith the example of a long distance w ater supply project, the effects of w ater hammer protection bet ween pneumatic tank and ordinary air tank w ere compared using the numerical simu-lation of t ransition period. The result s showed t hat pneumatic tank can effect ively elim inat e pump-stopping water hammer in the long distance water supply project and has better protect ive features than t he ordinary air tank.