单级离心屏蔽泵转子动静摩擦故障诊断
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摘要
试验研究单级离心屏蔽泵转子动静摩擦时的故障征兆与诊断方法。以某轴承磨损量存在阶跃变化现象的硼酸屏蔽泵为对象,试验发现振动幅值也存在周期性阶跃变化趋势,振动频谱以一倍旋转频率为主,振动幅值升高时会激发倍频分量。诊断屏蔽泵转子存在局部动静摩擦。解体检查验证了屏蔽泵后导轴承、叶轮与口环表面局部存在摩擦。研究表明单级离心屏蔽泵轴承磨损量和振动频谱信息可用于诊断早期动静摩擦故障及发展趋势。
Fault symptom and diagnosis method of single-stage centrifugal canned motor pump static and dynamic friction are studied. Taking a boric acid canned pump with step changed phenomenon of bearing wear as object, it is found that the vibration amplitude exist periodic variation trend like the bearing wear, and vibration spectrum consist with the rotating frequency, also when the vibration amplitude high, frequency-doubled components will be excited. There existed friction in the canned pump diagnosed by vibration analysis. At last, there found friction marks on the surface of the rear guide bearing, impeller and ring after strip inspection, which verified the theories and experimental result. The research has shown that trends of bearing wear and vibration amplitude will be useful for canned pump during the early period of slight friction.
Fault symptom and diagnosis method of single-stage centrifugal canned motor pump static and dynamic friction are studied. Taking a boric acid canned pump with step changed phenomenon of bearing wear as object, it is found that the vibration amplitude exist periodic variation trend like the bearing wear, and vibration spectrum consist with the rotating frequency, also when the vibration amplitude high, frequency-doubled components will be excited. There existed friction in the canned pump diagnosed by vibration analysis. At last, there found friction marks on the surface of the rear guide bearing, impeller and ring after strip inspection, which verified the theories and experimental result. The research has shown that trends of bearing wear and vibration amplitude will be useful for canned pump during the early period of slight friction.
引文
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[2]Shui qing Zhou,Fan yu Kong,Ting Wang,et al.Study on Performance of Canned Motor Pump Based on Numerical Simulation[A].ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels,Microchannels,and Minichannels[C].Montreal:Canada,2010.
[3]Bin Xia,Fan-Yu Kong,Yu xing Bai,et al.Numerical Simulation and Performance Prediction of Multistage Canned Motor Pump[A]ASME 2016 Fluids Engineering Division Summer Meeting collocated with the ASME 2016 Heat Transfer Summer Conference and the ASME 2016 14th International Conference on Nanochannels,Microchannels,and Minichannels[C].Washington DC:USA,2016.
[4]Alexandrina Untaroiu,Timothy W Dimond,Paul E Allaire,et al.CFDAnalysis of a Canned Pump Rotor Considering an Annular Fluid with Axial Flow[A].ASME Turbo Expo 2009[C].Orlando:USA,2009.
[5]Wen bo Ning,De zhong Wang.Dynamic Stability Analysis of Cans in Reactor Coolant Pump Subjected to Axial Flow[A].2014 22nd International Conference on Nuclear Engineering Volume 1[C]Czech Republic,2014.
[6]张黎明,赵新文,蔡琦.基于SVM的核动力屏蔽泵老化状态评估[J].核动力工程,2011,32(2):124~127.
[7]陈玲,蔡琦,蔡章生.屏蔽泵技术状态的灰色模糊评估[J].核动力工程,2008,29(1):39~41,45.
[8]莫政宇,伍超,李海峰,等.屏蔽泵热备用起动卡涩故障原因分析[J].核动力工程,2009,30(5):93~95,108.
[9]孔繁余,高翠兰,张旭锋,等.PBN65-40-250型屏蔽泵轴向力平衡计算及其试验[J].农业工程学报,2009,25(5):68~72.
[10]孔繁余,蒋万明,王文廷,等.低温高速屏蔽泵汽蚀性能的流热耦合分析[J].华中科技大学学报(自然科学版),2012,40(5):4~28.
[11]宋梅村,蔡琦.灰色聚类理论在屏蔽泵状态评估中的应用[J].原子能科学技术,2011,45(7):818~821.
[12]石明江,罗仁泽,付元华.小波和能量特征提取的旋转机械故障诊断方法[J].电子测量与仪器学报,2015,29(8):1114~1120.
[13]张娅,王维民,姚剑飞.双盘转子系统轴向-径向碰摩非线性动力学特性分析[J].振动与冲击,2012,31(12):141~145.
[14]夏文静,傅行军.小波变换在转子动静碰摩故障诊断中的应用[J].汽轮机技术,2005,47(3):215~218.
[15]田永伟,杨建刚.旋转机械动静碰摩耦合振动分析[J].机械工程学报,2010,46(7):102~107.
[16]闻邦椿,顾家柳,夏松波,等.高等转子动力学-理论、技术及应用[M].北京:机械工业出版社,1999.
[17]张文.转子动力学理论基础[M].北京:科学出版社,1990.