摘要
为满足水力式升船机向巨型化发展的需求,进一步开展其控制阀门的选型研究十分必要。本文针对较为适应水力式升船机运行特性的两类工业阀门——活塞式调流阀与固定式锥形阀,研制了一种工业阀门水力特性试验装置,进行了系统全面的水力特性对比试验研究。研究成果表明,锥形阀的泄流能力明显优于活塞阀,流量系数随开度变化的线性度更高。两类阀门均以雾状空化为主,活塞阀对冲出流容易形成漩涡空化,对管壁的空蚀作用更强;锥形阀出流较均匀,流场结构更简单稳定。等流量系数下,两类阀门的抗空化性能差异不大,说明锥形阀近似于通过降低抗空化性能换取了更高的泄流能力。相同试验条件下,锥形阀阀后管壁沿程时均压力更高,压力脉动更弱。可见,锥形阀的综合水力特性优于活塞阀,更为适应未来水力式升船机的发展需求。
In order to meet the needs of hydro-driven ship lift to the mega development, it is necessary to carry out further research on the selection of its control valve. This paper develops an industrial valve hydraulic characteristic test device for two types of industrial valves that are more suitable for the operation characteristics of hydro-driven ship lift-the plunger valve and fixed cone valve, and conducts a comprehensive hydraulic characteristic comparison test. The research results show that the discharge capacity of the cone valve is significantly better than that of the plunger valve, and the linearity of the flow coefficient changes with the opening degree is higher. Both types of valves are mainly foggy cavitation. Plunger valve is easy to form vortex cavitation on the flushing flow and has stronger cavitation erosion on the pipe wall. The cone valve has a more uniform outflow and a simple and stable flow field structure. Under the same flow coefficient, the anti-cavitation performance of the two types of valves are not much different, indicating that the cone valve is similar to reducing the anti-cavitation performance in exchange for a higher discharge capacity. Under the same test conditions, the average pressure is higher and the pulsating pressure is weaker along the pipe wall of the cone valve. It can be seen that the comprehensive hydraulic characteristics of the cone valve are superior to the plunger valve, which is more suitable for the future development needs of hydro-driven ship lift.
作者
王蛟
胡亚安
严秀俊
吴波
张绪进
WANG Jiao;HU Yaan;YAN Xiujun;WU Bo;ZHANG Xujin(Chongqing Southwest Research Institute for Water Transport Engineering,Chongqing Jiaotong University,Chongqing 400016,China;Key Laboratory of Navigation Structures State,Nanjing Hydraulic Research Institute,Nanjing 210029,Jiangsu,China)
出处
《水利水电技术》
北大核心
2020年第12期125-132,共8页
Water Resources and Hydropower Engineering
基金
云南省院士基金自由探索项目(HNKJ17-H19)
国家重点研发计划项目(2016YFC0402001)。
关键词
水力式升船机
控制阀门
物模试验
流量系数
空化数
管壁压力
hydro-driven ship lift
control valve
physical modeling experiment
flow coefficient
cavitation number
wall pressure
