液压隔膜泵泵头的数值模拟和试验研究  

Numerical Simulation and Experimental Research of Pump Head of Hydraulic Diaphragm Pump

作　　者：朱幼君 杨晓 Zhu Youjun;Yang Xiao

机构地区：[1]上海发电设备成套设计研究院有限责任公司

出　　处：《工程机械》2024年第1期33-38,I0010,共7页Construction Machinery and Equipment

摘　　要：液压隔膜泵泵头是计量泵的关键部件,对计量精度和可靠性影响较大,并影响介质输送和安全生产的正常运行。基于CFD方法,应用FLUENT软件提供的动网格模型,对隔膜泵泵阀三维流场进行动态数值模拟,建立往复泵球阀运动规律的计算模型。通过球阀运动可视化试验测量,比较同等条件下的仿真与测量结果,二者基本相符。结合泵体和阀体内流体压力波动测量,对球阀运动引起的压力波动进行分析,推导速比、冲程、介质黏度等对球阀升程的影响规律,为泵头球阀的设计选型提供参考。The pump head of the hydraulic diaphragm pump is a key component of the metering pump,which has a large impact on the metering accuracy and reliability and affects the normal operation of medium transportation and safe production.Based on CFD method,the dynamic mesh model provided by software FLUENT is applied for dynamic numerical simulation of the three-dimensional flow field of the diaphragm pump and to establish the calculation model for the motion law of the ball valve of the reciprocating pump.Through visual tests and measurements of the ball valve motions,the simulation and measurement results under the same condition are compared,and the two are basically consistent.Combined with the measurement of fluid pressure fluctuation in the pump and valve,the pressure fluctuation caused by the ball valve motions is analyzed,and the influence of speed ratio,stroke and medium viscosity on ball valve lift is deduced,which provides a reference for the design and selection of ball valves for the pump head.

关 键 词：液压隔膜泵 泵头 动网格模型 运动轨迹 

分 类 号：TH137.5[机械工程—机械制造及自动化]