Nonlinear Dynamic Performance and Analysis Model of Pump Valve System of Diaphragm Pump Hydraulic End

The analysis of the dynamic lift performance and valve gap flow characteristics of the diaphragm pump hydraulic end valve has an important impact on the safety and stability of the diaphragm pump valve design. In this paper the dynamic performance of valve and valve gap flow of a new diaphragm pump is calculated and analyzed in Chongqing pump industry. Firstly, the nonlinear motion equation of a new type of cone valve, and the dynamic lift curve of the pump valve is calculated. Calculated valve gap flow of the pump valve and compare it with the actual flow data to verify the correctness of the dynamic analysis model of the pump valve. Based on the dynamic model and the main functions of diaphragm pump valve established in this paper, maximum flow rate, ending speed and hydraulic loss, are calculated and analyzed. Meanwhile, the effects of erosion failure and collision failure on the service life of diaphragm pump cone valve are analyzed. At the same time, the influence of impulse and spring stiffness on the volume efficiency of diaphragm pump is calculated and discussed. Through the above research and analysis, the practical engineering guiding significance is provided for the geometrical optimization and design of the hydraulic end cone valve of the new mine diaphragm pump.