启停对推力轴承可靠性与阻力矩的影响测试  

Testing of Influence of Start-Stop on the Reliability and Drag Torque of the Thrust Bearing

作　　者：张健鑫[1] 张东辉[1] 谷继品[1] 郭晓娴[1] 陈树明[1] 刘小军 Zhang Jianxin;Zhang Donghui;Gu Jipin;Guo Xiaoxian;Chen Shuming;Liu Xiaojun(China Institute of Atomic Energy,Beijing,102413,China;Hunan SUND Industrial and Technological Co.,Ltd.,Xiangtan,Hunan,411102,China)

机构地区：[1]中国原子能科学研究院,北京102413 [2]湖南崇德工业科技有限公司,湖南湘潭411102

出　　处：《核动力工程》2022年第3期173-178,共6页Nuclear Power Engineering

摘　　要：为了测试反复启停对钠冷快堆(SFR)一回路主泵推力轴承可靠性和阻力矩的影响,采用适用于小样本的分散系数法设计了可靠性统计方案,制造了3套巴氏合金推力瓦和1台上部组合轴承样机,设计并搭建了试验台,测试了启动阻力矩随停机加载时间的变化情况,模拟推力轴承的真实情况并开展了反复启停试验。试验研究表明,启动阻力矩均会随着停机加载时间的延长而不断增大;反复启停对推力瓦的磨损寿命影响较小,置信度0.9时,推力轴承启停125次不发生失效的可靠度超过0.99996;反复启停会影响推力轴承的阻力矩,随着启动次数的增多,推力轴承的阻力矩呈缓慢上升趋势,证明开展主泵电机启动能力设计时,必须要考虑启停次数的影响。本文研究可为主泵电机启动能力设计提供参考。In order to test the effect of repeated start-stop on the reliability and drag torque of the thrust bearing of the primary circuit main pump in sodium cooled fast reactor(SFR),a reliability statistical scheme was designed by using the dispersion coefficient method suitable for small samples,three sets of Babbitt thrust pads and one upper combination bearing prototype were manufactured,a test bench was designed and built,the change of starting drag torque with shutdown loading time was tested,repeated start-stop tests were carried out by simulating the real situation of the thrust bearing.The results show that the starting drag torque increases with the increase of shutdown loading time.The repeated start-stop has little effect on the wear life of the thrust pads,and the reliability of the thrust bearing start-stop for 125 times without failure exceeds 0.99996 when the confidence level is 0.9.The repeated start-stop has effect on the drag torque of the thrust bearing,and the drag torque of the thrust bearing shows a slow upward trend with the increase of starting times.It is proved that the effect of the start-stop times must be factored in the design of starting capacity of main pump motor.This study can provide a reference for the design of starting capacity of main pump motor.

关 键 词：钠冷快堆(SFR) 主泵 推力轴承 可靠性 阻力矩 

分 类 号：TL353[核科学技术—核技术及应用]