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针对某双组元统一推进气路系统采用的高压卸荷膜片式减压器,建立起有限体积瞬变仿真模型,并搭建起减压器特性研究系统的模块化仿真模型.针对试验过程中出现的振荡现象,借助数值手段阐明了各结构和控制参数对减压器工作稳定性的影响,得出了减弱振荡的各种措施:减小阀芯质量,增大高、低压腔体积,增大弹性元件材料的阻尼系数,减小反馈孔直径,增大膜片刚度.与试验和相关文献研究情况的对比证实了某些措施的有效性.
Aiming at the high-pressure unloading diaphragm pressure reducer adopted by a two-component unified propulsion pneumatic system, a finite volume transient simulation model is established and a modular simulation model of the decompressor characteristics research system is established. The phenomena of oscillation appeared, and the influence of each structure and control parameters on the working stability of the pressure reducer was clarified by means of numerical means. Various measures were put forward to reduce the vibration of the pressure reducer: reducing the mass of the valve core, increasing the volume of the high and low pressure chambers, The damping coefficient of large elastic elements reduces the diameter of the feedback hole and increases the stiffness of the diaphragm. A comparison with the experimental and related literature studies confirms the effectiveness of some of the measures.