液压与气动2025，Vol.49Issue(5)：1-10,10.DOI:10.11832/j.issn.1000-4858.2025.05.001
偏转板射流阀断载压力特性理论模型
Theoretical Model of Cut-off Load Pressure Characteristics of Deflector Jet Valve
摘要
Abstract
The deflector jet valve commonly serves as the pilot stage of two-stage electro-hydraulic servo valves,and its cut-off load pressure characteristics directly affect the starting ability of the main valve of the electro-hydraulic servo valve.To quickly and accurately obtain the cut-off load pressure characteristics of the deflector jet valve,the deflector jet flow field is divided into four regions:primary jet,deflector pressure recovery,secondary jet,and receiving chamber pressure recovery.Considering the three-dimensional jet and boundary layer effects in the primary jet zone of the nozzle,the pressure characteristic equation of the deflector jet valve is established by using jet impact theory.Compared with the conventional plane jet theoretical model that does not consider boundary layer effects,the velocity distribution of the jet flow field obtained from the proposed model is more consistent with the CFD calculation results.The experimental testing of the cut-off load pressure characteristics of the deflector jet valve shows that the maximum deviation between the results obtained by the proposed model and experimental data is 9.7%.This model provides a solid theoretical foundation for further analysis of the deflector jet servo valve.关键词
偏转板射流阀/断载压力特性/三维射流流场/边界层Key words
deflector jet valve/cut-off load pressure characteristics/three-dimensional jet flow field/boundary layer分类
机械工程引用本文复制引用
王建森,何春阳,文小莉,景海,李恒,李少年..偏转板射流阀断载压力特性理论模型[J].液压与气动,2025,49(5):1-10,10.基金项目
国家重点研发计划(2023YFB3406704) （2023YFB3406704）
