Modeling and simulation analysis of a Dual-Stage Gas Pressure Reducing Valve based on AMESim

Wang Tongjian; Chen Hanlei; Yang Xuan; Wang Chen; Jiao Feifei; Li Tianrui

doi:10.16289/j.cnki.1002-0837.2025.03014

Abstract：The air supply and pressure regulating system is a basic part of the physical and chemical regenerative life protection and non-regenerative life protection of manned spacecraft.One of the key systems for the smooth operation of the system.In order to ensure the on-orbit safety and reliability of the high-pressure gas source in the gas supply and pressure regulation system,a two-stage pressure reducing valve is often used to reduce and stabilize the pressure,so as to provide downstream products with low-pressure gas with stable flow and velocity;therefore the pressure reducing valve is an important part to ensure the safety of the gas source.In this paper,based on the structure and principle of a certain type of double-stage pressure reducing valve,the simulation model of the double-stage pressure reducing valve is established by using the pneumatic and pneumatic component design library of AMESim,and the model is compared and verified by experimental data.The results show that the simulation model predicts the working process of the pressure reducing valve well,and the simulation scheme and model are accurate and effective.On this basis,the AMESim simulation model is used to analyze the key process design parameters such as spring stiffness,spool mass and damping hole cross-sectional area of the pressure reducing valve,and the influence laws on the output pressure of the pressure reducing valve and the structural dynamic characteristics are obtained.The findings presented in this paper offer valuable research insights and theoretical support for enhancing the performance of the two-stage pressure reducing valve,as well as providing useful references for future design improvements and on-orbit upgrades.