活塞式调流调压阀水力特性测试  

Hydraulic characteristics test of plunger control valve

作　　者：张延忠 耿运生 王志斌 ZHANG Yanzhong;GENG Yunsheng;WANG Zhibin(Hebei Water Conservancy Planning&Design Institute Co.,Ltd,Shijiazhuang 050021,China)

机构地区：[1]河北省水利规划设计研究院有限公司,石家庄050021

出　　处：《南水北调与水利科技（中英文）》2023年第6期1145-1151,1158,共8页South-to-North Water Transfers and Water Science & Technology

基　　金：河北省“三三三人才工程”资助项目(332015)。

摘　　要：为保证调流调压阀运行安全稳定,从阀门水力设计、安装高程确定及运行调度等方面提出阀门水力特性的优化措施。分析调流调压阀临界汽蚀系数及汽蚀装置系数确定方法,借鉴水轮机汽蚀力学判据的概念,推导出阀门安装高程的计算公式。采集在线调流调压阀运行数据,绘制真机流量系数与开度特性曲线,对阀门水力设计进行验证和校核。结果表明:阀门开度大于45.3%时流量系数实测值与设计曲线基本一致,但在小开度段偏差稍大;现场试验过程中阀门运行平稳,噪声在90 dB(A)以下,振动幅度也在较小范围内,进一步验证了调流调压阀水力特性优化设计及安装高程确定方法的合理性。Plunger control valves are widely applied in water diversion projects,and thus the design of hydraulic characteristics of valves becomes important.Flow path optimization and simulation calculation are two hydraulic characteristics of valves that are mostly studied,while the research on valves setting elevation is scarce.Therefore,it is necessary to optimize the hydraulic characteristics of the valve's internal flow path,determine the reasonable setting elevation of valves,and eliminate cavitation and vibration during valve design.This study focused on improving the operating conditions of valves and determining the reasonable setting elevation of valves,to prolong the service life of valves.The mechanical criterion of hydraulic turbine cavitation was utilized,and the formula for calculating the valves setting elevation was derived.In addition,the hydraulic design of valves was verified by collecting the operating data of the in-line valve and drawing the flow coefficientopening characteristic curve of a real hydraulic turbine,which was later used to guide the field operation.The results show that the measured flow coefficient is consistent with the designed curve when the opening of the valve is above 45.3%,which verifies the correctness of the hydraulic design of the valve.However,in the small opening section of the valve,the deviation between the measured flow coefficient and the designed curve is slightly larger.In the field test,the valve runs smoothly,and the noise is less than 90 dB(A),with the vibration fluctuating in a small range.The safe and smooth operation of the valve is ensured by optimizing the hydraulic design of the valve and determining the reasonable setting elevation of the valve.The cavitation,vibration,and noise of the valve are reduced,and the service life of the valve is extended.In addition,the field test of valve performance further verifies the rationality of the design of hydraulic characteristics of valves.

关 键 词：调流调压阀 水力特性 汽蚀系数 安装高程 测试分析 

分 类 号：TV131.63[水利工程—水力学及河流动力学]