液压与气动2025，Vol.49Issue(12)：78-84,7.DOI:10.11832/j.issn.1000-4858.2025.12.008
先导式溢流阀磨损性能退化分析
Analysis on Wear Performance Degradation of Pilot Operated Relief Valve
摘要
Abstract
As an important component for regulating and protecting hydraulic systems,the performance degradation of relief valves will directly affect the stability and safety of the system.After a certain type of pilot operated relief valve has been in service in hydraulic systems of engineering equipment for a period of time,its performance often deteriorates due to wear of the main valve core.Therefore,it is urgent to evaluate its performance to provide a basis for subsequent service life assessment.A mathematical model for a pilot operated relief valve is established,and the impact trend of changes in the radial clearance and rounded corner radius between the main valve core and the valve sleeve on static and dynamic characteristics based on the model are qualitatively analyzed;a simulation model is established in commercial software,and the simulation model is validated using measured data to quantitatively analyze the influence of wear parameters on its static and dynamic characteristics.The results show that in the flow range of 0～7 L/min,the increase in radial clearance leads to a slower gain in the static characteristic curve,while the increase in rounded corner radius leads to a nonlinear change in the gain of the static characteristic curve;the increase of radial clearance and rounded corner radius will prolong the response time,increase the pressure overshoot and steady-state pressure,among which the increase of radial clearance has a more significant impact on the extension of dynamic response time of the relief valve,and the increase of rounded corner radius has a more significant impact on the increase of pressure overshoot.The research results can provide theoretical basis and tool support for the performance evaluation and fault prediction of relief valves.关键词
溢流阀/阀芯磨损/静态特性/动态特性Key words
relief valve/valve core wear/static characteristic/dynamic characteristic分类
机械制造引用本文复制引用
高宏新,郝惠敏,刘根瑞,常根,陈文辉..先导式溢流阀磨损性能退化分析[J].液压与气动,2025,49(12):78-84,7.基金项目
山西省基础研究计划联合资助项目(TZLH20230818010) （TZLH20230818010）
