电磁喷油器球阀流动分析  

Cavitation Analysis on Ball Valve in Solenoid Injector

作　　者：夏少华[1] 郑金保[1] 缪雪龙[1] 居钰生[1] 吴松[1] 侯晓晶[1] 

机构地区：[1]中国一汽无锡油泵油嘴研究所,江苏无锡214063

出　　处：《内燃机学报》2012年第4期354-358,共5页Transactions of Csice

基　　金：中国一汽无锡油泵油嘴研究所预研资助项目(kg12005)

摘　　要：试验单独测得了与密封球阀相关的衔铁位移曲线和控制腔的压力曲线,并以此为动态边界条件进行了电磁喷油器球阀流动特性计算.结果显示,球阀处会发生穴蚀现象,穴蚀的产生与小球位移和控制腔压力变化情况有关,密封球的升程变化会造成节流位置的移动.发生穴蚀的区域具体体现在密封线上边缘区域和球座入口开始并延伸一段距离的锥面上,这与检测到的球阀座面遭到穴蚀破坏的位置吻合.球阀流动计算中,球阀底部一直存在压力较大的滞止区域,球阀孔口附近的气泡主要产生在升程相对较大的区域.Curves of lift and pressure relating to ball valve were measured respectively and flow character- istics of control valve were calculated based on the boundary of the measured lift and pressure. The results show that： cavitation occurs at the ball valve. Formation and development of cavitation are relate to the lift and pressure change of ball valve. Throttling position will transfer to the minimum flow area according the lift change, cavitation zone focuses on the sealing ring nearly by, upper zone and conical surface from entrance to a certain distance. Cavitation zone calculated matches well with valve seat detected. Stag- nation region under the ball exists and has higher pressure, bubbles are produced at large lift mainly,

关 键 词：球阀 穴蚀 压力 升程 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]