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本文采用可靠性工程学的方法,对北京煤气用具厂生产的YSP-15型液化石油气钢瓶的可靠性进行了研究。在现有资料的基础上,利用失效模式及效应分析法,确定了钢瓶的主要失效模式及其效应。为了搞清钢瓶最危险的失效模式——“钢瓶破裂”的机理,用慢应变速率法对钢瓶用钢在硫化氢水溶液中的硫化物应力腐蚀开裂的敏感性做了测试;并利用失效树分析法对影响钢瓶破裂的因素做了全面的分析。同时,以此为例,对动态失效树的构造及应用做了大胆的探索,为钢瓶的可靠性评估提供了一种新方法。在上述工作的基础上,本文提出了提高钢瓶可靠性的途径与方法。
In this paper, reliability engineering method was used to study the reliability of YSP-15 liquefied petroleum gas cylinders produced by Beijing Gas Appliance Factory. Based on the existing data, the failure mode and effect analysis method were used to determine the main failure modes of cylinders and their effects. In order to find out the most dangerous failure mode of cylinder - the mechanism of “cylinder breakage”, the sensitivity of stress corrosion cracking of sulfide steel in hydrogen sulfide solution was tested by slow strain rate method. The failure tree analysis Law on the impact of the bottle rupture of the factors made a comprehensive analysis. At the same time, taking this as an example, this paper makes a bold exploration of the construction and application of dynamic failure tree, which provides a new method for the reliability evaluation of cylinder. Based on the above work, this paper puts forward ways and methods to improve the reliability of cylinder.