Research on vibration characteristics of cone valve based on steady state hydrodynamics

作者：Jilu Liu, Gang Yang, Baoren Li, Jingrui Chu, Zhixi Zhao, Chang Yuan · 发表于：Proceedings of the Institution of Mechanical Engineers Part E Journal of Process Mechanical Engineering · 年份：2024 · DOI：10.1177/09544089241242614 · 被引用次数：6 · 研究领域：Hydraulic and Pneumatic Systems、Advanced Sensor and Control Systems、Vibration and Dynamic Analysis

The steady-state fluid dynamic force of the cone valve core reduces the stability of the cone valve, thereby affecting its vibration characteristics. This study first derived the formula for calculating the steady-state fluid dynamic force of the valve core using the momentum theorem. Then, the study used the Computational Fluid Dynamics (CFD) method to explore the variation of steady-state fluid dynamic force with the opening degree of the cone valve and the pressure difference at the inlet and outlet. The study also analyzed the steady-state fluid dynamic force of the improved structure cone valve. Combining the CFD calculation results with the established axial vibration and dynamic models of the valve core spring system, a system dynamics simulation model was developed. Innovatively, the study combined experimental and simulation methods to investigate the vibration characteristics of the cone valve and the impact of steady-state fluid dynamic force on these characteristics. The experimental results aligned well with the simulation results, showing that the influence of steady-state fluid dynamic force on vibration characteristics is similar to that of spring force. At a small opening degree, the compensation structure of steady-state fluid dynamic force can reduce axial vibration amplitude. Increasing the inlet pressure from 2.0 MPa to 2.5 MPa results in a decrease in axial amplitude and an increase in the numerical value of the vibration balance position. Increasing the...