CAJ | 학술논문

针对某型号充气开关在寿命试验中出现的小活阀非金属脱粘故障，建立了故障树，应用故障件失效分析和有限元计算等方法进行了故障定位及机理分析，确认故障为35MPa 压力下小活阀非金属变形过大所致。依据分析结果对充气开关进行了改进，通过在大活阀底面上增加限位台阶的方法限制了小活阀非金属的变形量，改进后的试验结果表明改进措施合理有效。对活阀非金属脱粘的原因分析和改进具有一定的指导作用。
침대모형호충기개관재수명시험중출현적소활벌비금속탈점고장，건립료고장수，응용고장건실효분석화유한원계산등방법진행료고장정위급궤리분석，학인고장위35MPa 압력하소활벌비금속변형과대소치。의거분석결과대충기개관진행료개진，통과재대활벌저면상증가한위태계적방법한제료소활벌비금속적변형량，개진후적시험결과표명개진조시합리유효。대활벌비금속탈점적원인분석화개진구유일정적지도작용。
Fault tree was established for the fault of little piston’s nonmetal fall-off of charge valve happened during life experiment. Invalidation and FEA analysis were done to locate the fault mechanism, finally the fault was confirmed to be caused by excessive transmutation of little piston’s nonmetal. According to the analysis, the structure of charge valve was improved by adding a step on the bottom face of big piston to limit the transmulation of little piston. Experiment showed the improvement was rather effective. The work could serve as a guidance to fault analysis and improvement of piston’s nonmetal fall-off.