摘要
【目的】为实现紧急电磁阀的自主可控与安全应用,针对自主化紧急电磁阀开展可靠性与加速寿命试验研究,通过试验结果与失效分析改进现有设计,并验证其寿命性能。【方法】采用FMMEA(故障模式、机理与影响分析)方法分析电磁阀的失效模式、机理及敏感应力;通过HALT(高加速寿命试验)确定电磁阀的工作极限及与进口件的性能差距;基于Weibull(威布尔)分布和Arrhenius(阿伦尼乌斯)模型的ALT(加速寿命试验)评估电磁阀寿命特征;结合故障件失效分析结果,提出设计改进方案并重新验证寿命特征。【结果及结论】FMMEA分析表明,电磁阀的关键失效部件为止回阀与密封圈,主要敏感应力为温度与电应力;HALT结果显示,自主化电磁阀的高温性能与进口件相当,但低温性能存在差距(极限温度为-40℃vs.-60℃);初始ALT试验表明,电磁阀激活能为0.59eV,等效寿命为5.97年,无法满足动车组要求(7.5年)。通过失效分析发现止回阀硫化橡胶铜粉含量(应由60%降至5%)及工艺缺陷是主要失效原因,改进后再次ALT验证显示,等效寿命提升至10.83年,显著超过地铁(6.0年)与动车组(7.5年)的寿命要求,为自主化电磁阀的工程应用提供了可靠依据。
[Objective]To achieve the autonomous control and safe application of emergency solenoid valves,a reliability and accelerated life test research on autonomous emergency so-lenoid valves is carried out.The existing design is improved through test results and failure analysis,and its life perform-ance is verified.[Method]FMMEA(failure mode,mecha-nism,and effects analysis)method is used to analyze the fail-ure mode,mechanism,and sensitive stress of solenoid valve;Working limits of the solenoid valve and the performance gap with imported parts are determined through HALT(highly ac-celerated life testing);Life characteristics of the solenoid valve is evaluated based on Weibull distribution and ALT(acceler-ated life testing)of Arrhenius model;Combined with the fail-ure analysis results of the faulty parts,a design improvement plan is proposed and the life characteristics are re-verified.[Result&Conclusion]FMMEA analysis shows that the key failure components of the solenoid valve are the check valve and the sealing ring,and the main sensitive stresses are temper-ature and electrical stress;HALT results show that the high-temperature performance of the autonomous solenoid valve is comparable to that of imported parts,but there is a gap in low-temperature performance(with a limit temperature of-40℃vs.-60℃);Theinitial ALT test showsthat theactivation energy of the solenoid valve is 0.59 eV,with an equivalent li-fespan of 5.97 years,failing to meet EMU requirements(7.5 years).Through failure analysis,it is found that the content of vulcanized rubber copper powder in the check valve(it should be reduced from 60%to 5%)and process defects are the main causes of failure.After improvement,the re-verification of ALT shows that the equivalent life is increased to 10.83 years,significantly exceeding the life requirements of subway(6.0 years)and EMU(electric multiple units)(7.5 years),this provides a reliable basis for the engineering application of au-tonomous solenoid valves.
作者
都占江
陶富文
DU Zhanjiang;TAO Fuwen(Nanjing CRRC Puzhen Haitai Brake Equipment Co.,Ltd.,211800,Nanjing,China)
出处
《城市轨道交通研究》
北大核心
2025年第8期139-144,共6页
Urban Mass Transit
基金
国家重点研发计划课题(2022YFB4301202)。
