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.
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. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(21): 41-45.
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