快堆钠泵机械密封可靠性评价

Reliability Assessment of Sodium Pump Mechanical Seal for Fast Reactor

基于所收集的俄罗斯钠泵机械密封的寿命数据,利用基于威布尔分布的分析方法对其进行可靠性评价,得到了其可靠性信息。对国内机械密封所收集的寿命数据,利用最优置信限法对其进行可靠性评价,并将评价结果与俄罗斯钠泵机械密封的评价结果进行了对比分析。结果显示,在置信度为0.8,寿命为25 000h时,俄罗斯钠泵机械密封的可靠度不低于0.947 3,国内的机械密封可靠度不低于0.874 4。可靠性评价结果表明,国内机械密封的可靠性与俄罗斯钠泵机械密封的可靠性有一定的差距,但差距不是很大。

According to the collected lifetime data, the reliability assessment of the sodi- um pump mechanical seals for Russian fast reactor was completed by Weibull distribu- tion. And then the reliability information of the sodium pump mechanical seals was obtained. The reliability assessment based on the collected lifetime data of domestic mechanical seals was completed by optimal confidence limit method, whose assessment results were compared with those of Russian sodium pump mechanical seals. The calcu- lation results show that the reliabilities for Russian sodium pump mechanical seals and domestic mechanical seals are no less than 0. 947 3 and 0. 874 4, respectively, with 0.8 one-sided confidence limits of 25 000 operaiion hours. The results of the reliability assessment show that the reliability of the sodium pump mechanical seals for Russian pump is better than the mechanical seals~ on domestic pump, but the gap between the two is not significant.