摘要
液压支架一般采用乳化液作为工作介质,对于采用水包油型乳化液供液的泵站系统,其卸荷阀内部流液流速快且压力变化大,极易产生气蚀和磨损。以某型卸荷阀主阀作为研究对象,采用GAMBIT建立卸荷阀主阀模型,利用FLUENT分析平台对采用不同阀口倒角时卸荷主阀内部流场状况进行分析,以研究不同阀口倒角角度对卸荷主阀流场的影响。研究表明,该卸荷阀采用60°倒角阀口的阀座能有效抑制气穴的产生,降低振动和噪声,减少湍动能损耗。研究结果为此类结构的乳化液泵站卸荷阀的气穴控制和结构优化提供一定的参考。
Emulsion is generally used as the working medium of the hydraulic support,for the pumping station system with oil in water emulsion supply,the flow velocity of the unloading valve is fast and the pressure changes greatly,which is easy to produce cavitation and wear.The main valve of a unloading valve was taken as the research object,the main valve model of unloading valve was established by GAMBIT,and the internal flow field of unloading main valve was analyzed by FLUENT analysis platform when different valve port chamfers were used to study the influence of different valve port chamfers on the flow field of unloading main valve.The results show that the 60°chamfered valve seat can effectively inhibit cavitation,reduce vibration and noise,and reduce turbulent kinetic energy loss.The research results provide a reference for cavitation control and structure optimization of unloading valve of emulsion pump station with this kind of structure.
作者
牛梦奇
郑子勤
朱德
曲日金
肖欣谕
Niu Mengqi;Zheng Ziqin;Zhu De;Qu Rijin;Xiao Xinyu(China University of Mining and Technology(Beijing),Beijing 100083,China)
出处
《煤矿机械》
北大核心
2020年第10期1-4,共4页
Coal Mine Machinery
关键词
卸荷阀
流场
倒角角度
气穴
结构优化
unloading valve
flow field
chamfer angle
cavitation
structure optimization
