基于水击防护的球阀关闭规律研究

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (21) : 41-45.

论文

基于水击防护的球阀关闭规律研究

彭利坤，屈铎，许文奇，陈佳

作者信息 +

Closing law of ball valves based on water hammer protection

PENG Likun，QU Duo , XU Wenqi，CHEN Jia

Author information +

文章历史 +

摘要

针对舰船纵倾均衡调水系统中球阀关闭时水击严重的问题，设计搭建了包含电液球阀和数字步进球阀的实验系统。通过CFD关阀水击计算与实验研究相结合的方法，重点分析单线性、多种两阶段线性关阀规律对系统水击特性的影响。结果表明，相比单线性关阀，先快后慢的两阶段线性关阀能有效缓解阀门完全关闭后的压力振荡，但当快关阶段角度太大时反而导致关阀过程中的水击压强升高;同时当快关阶段角度较小时，则水击防护效果不佳；就本研究而言，以快慢速比1.6且快关角度在45%时水击防护效果较好。

Abstract

Aiming at problems of serious water hammers caused by closing ball valves in a ship trim balanced water transfer system, a test system including electro-hydraulic ball valve and digital stepping ball valve was built.Using the method of CFD valve-closing water hammer calculation combined with test study, influences of several valve-closing laws on system water hammer characteristics were analyzed.The results showed that compared with the single linear valve-closing law, the two-stage (first quick then slow) linear valve-closing law can effectively relieve pressure oscillation after fully closing valve; however, too large angle of quick valve-closing stage may cause water hammer pressure to rise, while smaller angle of quick valve-closing stage may cause the water hammer protection effect to be weak; here, the two-stage valve-closing law with quick-closing angle of 45% and the quick-slow speed ratio of 1.6 has a better water hammer protection effect.

导出引用

彭利坤，屈铎，许文奇，陈佳. 基于水击防护的球阀关闭规律研究[J]. 振动与冲击, 2018, 37(21): 41-45

PENG Likun，QU Duo,XU Wenqi，CHEN Jia. Closing law of ball valves based on water hammer protection[J]. Journal of Vibration and Shock, 2018, 37(21): 41-45

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