液控单向阀的气穴旋涡现象和流量分析
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摘要
应用Fluent软件对液控单向阀内部的流道进行三维模拟仿真,得到其在卸载时的压力分布、速度分布矢量图和带有速度分布矢量的压力分布图,分析了空化旋涡产生和影响,并对液控单向阀的阀芯周围的通油孔的数量进行了优化改进,发现通油孔数目的增加可以使旋涡区域的压强增加,减小了产生空化的可能,并随着通油孔数目的增加减小了阀芯节流口处的最大流速,并且使出口处的流量增加,为液控单向阀的设计提供了理论依据。
The application of Fluent software on the inside of the pilot controlled check valve internal 3D simulation,get the unloading pressure distribution, velocity distribution vector diagram and with the pressure of the velocity vector distribution, and analyzes the influence of cavitation vortex phenomenon, quantity of oil hole and valve control valve on the liquid around the optimized, found the number of oil hole can increase the pressure of eddies increases, reduced cavitation is possible, and as the number of oil hole increase to reduce the maximum velocity at the orifice of the valve, and the outlet of the flow increases, provides a theoretical basis for the design of hydraulic control valve.
The application of Fluent software on the inside of the pilot controlled check valve internal 3D simulation,get the unloading pressure distribution, velocity distribution vector diagram and with the pressure of the velocity vector distribution, and analyzes the influence of cavitation vortex phenomenon, quantity of oil hole and valve control valve on the liquid around the optimized, found the number of oil hole can increase the pressure of eddies increases, reduced cavitation is possible, and as the number of oil hole increase to reduce the maximum velocity at the orifice of the valve, and the outlet of the flow increases, provides a theoretical basis for the design of hydraulic control valve.
引文
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[5]杨孟庚.液压回路中液控单向阀的应用研究[J].湖南农机,2012,39(7):48-49.
[6]岳大灵,廉自生.支架液控单向阀流场的数值模拟和可视化分析[J].煤矿机械,2008,29(5):40-42.
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[2]王国玉,曹树良,赵令家,刘淑艳.高速水流中旋涡空化所引起的空蚀和振动[J].工程热物理学报,2002,23(6):707-710.
[3]支剑锋.工程机械液液压阀的气蚀及对策[J].机床与液压,2008,36(7):168-169.
[4]李海英,郑文婧,庞祺平.液控单向阀的气穴现象分析[J].甘肃科学学报,2015,27(6):82-85.
[5]杨孟庚.液压回路中液控单向阀的应用研究[J].湖南农机,2012,39(7):48-49.
[6]岳大灵,廉自生.支架液控单向阀流场的数值模拟和可视化分析[J].煤矿机械,2008,29(5):40-42.
[7]李鹏飞,徐敏义,王飞飞.精通CFD工程仿真与案例实战[M].北京:人民邮电出版社,2011.