Pneumatic resistance network analysis and dimension optimization of high pressure electronic pneumatic pressure reducing valve  

作　　者：徐志鹏 王宣银 

机构地区：[1]State Key Laboratory of Fluid Power Transmission and Control,Zhejiang University [2]College of Metrology and Measurement Engineering,China Jiliang University

出　　处：《Journal of Central South University》2011年第3期666-671,共6页中南大学学报（英文版）

基　　金：Project(50575202) supported by the National Natural Science Foundation of China

摘　　要：The structure and working principle of a self-deigned high pressure electronic pneumatic pressure reducing valve (EPPRV) with slide pilot are introduced.The resistance value formulas and the relationship between the resistance and pressure of three typical pneumatic resistances are obtained.Then,the method of static characteristics analysis only considering pneumatic resistances is proposed,the resistance network from gas supply to load is built up,and the mathematical model is derived from the flow rate formulas and flow conservation equations,with the compressibility of high pressure gas and temperature drop during the expansion considered in the model.Finally,the pilot spool displacement of 1.5 mm at an output pressure of 15MPa and the enlarging operating stroke of the pilot spool are taken as optimization targets,and the optimization is carried out based on genetic algorithm and the model mentioned above.The results show that the static characteristics of the EPPRV are significantly improved.The idea of static characteristics analysis and optimization based on pneumatic resistance network is valuable for the design of pneumatic components or system.The structure and working principle of a self-deigned high pressure electronic pneumatic pressure reducing valve （EPPRV） with slide pilot are introduced. The resistance value formulas and the relationship between the resistance and pressure of three typical pneumatic resistances are obtained. Then, the method of static characteristics analysis only considering pneumatic resistances is proposed, the resistance network from gas supply to load is built up, and the mathematical model is derived from the flow rate formulas and flow conservation equations, with the compressibility of high pressure gas and temperature drop during the expansion considered in the model. Finally, the pilot spool displacement of 1.5 mm at an output pressure of 15 MPa and the enlarging operating stroke of the pilot spool are taken as optimization targets, and the optimization is carried out based on genetic algorithm and the model mentioned above. The results show that the static characteristics of the EPPRV are significantly improved. The idea of static characteristics analysis and optimization based on pneumatic resistance network is valuable for the design of pneumatic components or system.

关 键 词：high pressure pressure reducing valve pneumatic resistance dimension optimization genetic algorithm 

分 类 号：TH138.5[机械工程—机械制造及自动化]