Simulation study on vibration characteristics of excitation valve

The traditional excitation system usually adopts the eletro-hydraulic excitation valve, of which the structure is complicated and requires externally being connected to the servo motor and control system, but cannot meet the requirements of high frequency and high flow. So a cartridge vibration valve is proposed. The valve has a simple structure, which is mainly composed of four two-way cartridge valves, a two-position four-way hydraulic control directional valve and two variable throttle orifices. Its frequency modulation mode is simple, and it can achieve high-frequency commutation and large-flow output. To study the effect of the parameters on the vibration characteristics of the vibration valve, the mathematical model and AMESim simulation model were established. The result shows that: the excitation frequency increases with the increasing of the working pressure, the area ratio and the spring stiffness of the two-way cartridge valve. Adjusting the orifice diameter and the working pressure can regulate the excitation frequency.