| 摘要: |
| 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。 |
| 关键词: 充气开关 小活阀 非金属脱粘 |
| 基金项目: |
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| Fault Analysis and Improvement of Little Piston’s Nonmetal Fall-off of Charge Valve |
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Shi Gang Yue Bing Yu Feng Zhou Haoyang Yin Wenhui Zhang Yi
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Beijing Institute of Astronautical Systems Engineering
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| Abstract: |
| 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. |
| Key words: charge valve little piston nonmetal fall-off |
