Characteristics Study And Flow Field Analysis On Double-Active Proportional Throttle Valve

With the rapid development of nuclear power, shipbuilding, aerospace and automobile industry, the requirements for heavy machinery are higher and higher. High-performance hydraulic component is an important factor of influencing the development of modern heavy machinery. Plug-in proportional throttle valve is a new hydraulic component to meet the needs of modern heavy machinery. Plug-in proportional throttle valves are widely used in modern heavy machinery hydraulic control system ,for the characteristics of large flow, fast response, high pressure resistant and long service life. So to study its structure and static and dynamic performance has theoretical significance and value.According to different feedback types between stages, this paper introduces the working principle and typical structure of displacement-force feedback, displacement-flow feedback, three class control and displacement-electric feedback separately, and compare their advantages an disadvantages, then conform the double-active proportional throttle valve as further study object.Aiming at double-active proportional throttle valve, simulation model are found on the basis of mathematical model and AMESim simulation platform. The steady control characteristics and step response characteristic had been studied. By comparing the simulation results and test results, conclude that, the double-active proportional throttle valve have good steady control characteristics and step response characteristic, and the mathematical model and simulation model were verified. Furthermore, the influencing factors of dynamic characteristics were studied by simulation analysis, including the pressure of control oil, the volume of control cavity etc, which established theoretical foundation for performance optimization of plug-in proportional throttle valve.Based on real structure parameters of 80 path double-active proportional throttle valve, found 3D and 2D model of internal flow field, and made numerical simulation to study the flow-pressure characteristics by FLUENT software, which also compared with test results. Furthermore, study and compare the pressure distribution and velocity distribution in 3D and 2D flow field, to provide theoretical basis for structure parameter design and flow channel optimization design of such elements.