多支撑转子系统轴承对荷载变化的敏感度研究Research on Bearing Load Sensitivity for Multi-support Rotor System
应光耀,吴文健,刘淑莲,郑水英
YING Guangyao,WU Wenjian,LIU Shulian,ZHENG Shuiying
摘要(Abstract):
大型汽轮发电机组转子-轴承系统由多个滑动轴承支撑,属于一个静不定结构,轴承载荷的分配直接影响着机组的安全稳定运行,严重时导致机组失稳。以某汽轮机的轴系为研究对象,基于虚位移原理建立了一个具有多支撑结构的转子动力学模型。利用该模型研究荷载变化对于轴系上各个轴承动力特性的影响,考察轴系上各轴承对荷载的敏感程度,从而为多跨转子轴承系统运行故障诊断提供理论指导。
Rotor-bearing system of large steam turbine generator unit,supported by multiple sliding bearings is a statically indeterminate structure.The operation safety of turbo-generator unit is influenced by bearing load distribution,and sometimes even causes instability.On the basis of the principle of virtual displacement,a rotor dynamics model of multi-support structure is built.The model is used to investigate the impact of load change on dynamic characteristics of bearings to check load sensitivity of the bearings,for the purpose of providing theoretical basis for fault diagnosis of multiple rotor bearing system.
关键词(KeyWords):
轴承荷载;多支撑;动力特性;模型
bearing load;multi-support;dynamic characteristics;model
基金项目(Foundation): 国家自然科学基金资助项目(51275452);; 国网浙江省电力公司科技项目(5211DS14005B)
作者(Author):
应光耀,吴文健,刘淑莲,郑水英
YING Guangyao,WU Wenjian,LIU Shulian,ZHENG Shuiying
DOI: 10.19585/j.zjdl.2017.01.010
参考文献(References):
- [1]金向明,高德平,蔡显新,等.航空发动机静不定转子支撑载荷的有限元分析[J].航空动力学报,2008,23(7):1323-1328.
- [2]A LIEW,N S FENG,E J HAHN.A non-linear transfer matrix technique for statically indeterminate rotor bearing systems[S].Proc Instn Mech Engrs,215:1343-1355.
- [3]W HU,N S FENG,E J HAHN.A comparison of techniques for identifying the configuration state of statically indeterminate rotor bearing systems[J].Tribology International,2004(37):149-157.
- [4]李学军,朱萍玉,刘义伦.复杂载荷下变刚度静不定梁程序化求解[J].工程力学,2003,20(4):116-121.
- [5]孙虎儿,杨兆建,梁群龙,等.基于轴承负荷的转子轴承系统建模与试验研究[J].中北大学学报(自然科学版).2010,31(1):14-18.
- [6]戴其兵,傅行军.大型汽轮发电机组标高对轴承载荷的影响[J].江苏电机工程,2008,27(2):64-66.
- [7]刘淑莲.转子-轴承系统非线性特性研究及油膜振荡的在线消除[D].杭州:浙江大学,2004.
- [8]李卫军,吴文健,蔡文方,等.某轴向排汽式汽轮发电机组异常振动的分析及处理[J].浙江电力,2015(11):8-11.
- [9]李晓晖,葛晶晶.300 MW汽轮机通流改造后振动问题的分析和处理[J].浙江电力,2016(6):49-52.