车用高压氢气减压阀的设计与特性研究OA

For high-power hydrogen fuel cell systems,a large-flow hydrogen pressure-reducing valve with a reverse-unloading tapered valve core is designed.The structural design and working principle of the product are introduced.A static mathematical model is established,and its pressure and flow characteristics are studied using AMESim software.Analysis reveales that increasing the valving element angle,reducing spring stiffness and enlarging piston area can improve the output pressure accuracy of the pressure-reducing valve.A test platform for the pressure-reducing valve is built to evaluate its static characteristics under actual operating conditions.The results demonstrate that this valve exhibits stable output pressure accuracy which is±8.1%.The adjustment accuracy is±0.61%,and it has large output flow rate and minimal lock-up pressure,indicating excellent operational performance.Moreover,the theoretical calculations,simulation analyses,and experimental test results show close agreement.