具有平衡活塞型先导阀的双级溢流阀稳定性分析  

Stability Analysis of Two-stage Relief Valve with Balanced Piston Pilot Valve

作　　者：訚耀保[1] 王东 李文顶 傅俊勇 张鑫彬 简洪超 YIN Yaobao;WANG Dong;LI Wending;FU Junyong;ZHANG Xinbin;JIAN Hongchao(School of Mechanical Engineering,Tongji University,Shanghai 201804;Shanghai Aerospace Control Technology Institute,Shanghai 201108;China North Vehicle Research Institute,Beijing 100072)

机构地区：[1]同济大学机械与能源工程学院,上海201804 [2]上海航天控制技术研究所,上海201108 [3]北方车辆研究所,北京100072

出　　处：《机械工程学报》2025年第6期299-307,共9页Journal of Mechanical Engineering

基　　金：国家自然科学基金资助项目(52175059)。

摘　　要：空间限制下采用具有平衡活塞型先导阀的双级溢流阀可提升液压系统的压力控制性能。针对航天领域用整体集成式双级溢流阀传递函数模型欠缺的问题,建立具有平衡活塞型先导阀的双级溢流阀的基本方程,通过线性化分别得到先导阀和主阀的传递函数。研究表明,先导阀的平衡活塞在阀芯前端隔出一个容腔,与先导阀芯耦合为谐振频率较高的质量-弹簧振动系统;平衡活塞与先导阀体之间具有环形间隙,构成储能元件,其转折频率随环形间隙减小而降低,当储能元件的转折频率低于先导阀质量-弹簧振动系统的固有频率时,先导阀与整阀均稳定性良好。获得了先导阀环形间隙值与双级溢流阀稳定性之间的关系,以及平衡活塞尺寸的设计准则。理论结果与试验结果一致。Under extremely small space,the pressure control performance of the hydraulic system can be improved by using a two-stage relief valve with a balanced piston pilot valve.In order to address the absence of a transfer function model for an integrated two-stage relief valve in the aerospace industry,the fundamental equation of a two-stage relief valve with a balanced piston pilot valve is established.The balancing piston separates a chamber in front of the pilot poppet,which is coupled with the pilot poppet to form a mass-spring vibration system with high resonant frequency.Additionally,an annular clearance is formed between the balancing piston and the pilot valve body,which is equivalent to an energy storage element,and its break frequency will decrease with the decrease of the clearance.When the break-frequency of the energy storage element is much lower than the natural frequency of the pilot valve mass-spring vibration system,the stability of the pilot valve will be guaranteed,thus improving the stability of the whole valve.The design requirement for the balanced piston is determined by the correlation between the annular clearance value and the stability of the relief valve.Finally,the correctness of the theoretical analysis is verified by experiments.

关 键 词：双级溢流阀 平衡活塞型先导阀 稳定性 频率特性 传递函数 

分 类 号：TH137[机械工程—机械制造及自动化]