Dynamic coupling characteristics of valve flow field and valve core movement in reciprocating pump
ZHANG Renhui1*, SUN Pengcheng1, FU Yihong2
1. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2. Chongqing Pump Industry Co. Ltd., Chongqing 400037, China
Abstract：In order to study the complex motion law of reciprocating pump valve, the motion analysis of the valve core was coupled with the numerical simulation of the flow field in the valve gap using dyna-mic mesh and user-defined functions technology. Furthermore, the coupling characteristics of pump valve and plunger motion were further analyzed, and the influence of the spring stiffness, preload and limiter height on the movement and performance of pump valves were discussed. The results show that the larger the spring stiffness or preload, the smaller the valve lift; the larger the gap flow resistance and the lower the suction performance. The influence of spring stiffness and preload on the action lag and leakage characteristics of valve are opposite to that on hydraulic efficiency and suction perfor-mance. With the increase of the height of limiter, the velocity of the valve core impacting on the limiter decreases gradually, and the lag height of the valve decreases at first and then increases, and there is an optimum range for the height of the limiter. Coupling analysis of plunger motion and valve motion of reciprocating pump, it can be seen that the influence of spring stiffness and preload on the impact of the valve on the valve seat is basically the same as that on the lag height of valve core. The indicator diagram of reciprocating pump can accurately simulate the action lag characteristics of suction valve and discharge valve. The research results can provide some reference for the optimization design of reciprocating pump valve.
张人会*,孙鹏程,符义红. 往复泵泵阀流场与阀芯运动的动态耦合特性[J]. 排灌机械工程学报, 2021, 39(3): 217-223.
ZHANG Renhui*,SUN Pengcheng,FU Yihong. Dynamic coupling characteristics of valve flow field and valve core movement in reciprocating pump. Journal of Drainage and Irrigation Machinery Engin, 2021, 39(3): 217-223.
