航空发动机轴承性能试验中磁悬浮电动机失稳现象分析  

Instability Analysis of Maglev Motor During Aero-Engine Bearing Performance Test

作　　者：岳晓晶 刘廷武 李锟 YUE Xiaojing;LIU Tingwu;LI Kun(AECC Sichuan Gas Turbine Establishment,Mianyang 621000,China)

机构地区：[1]中国航发四川燃气涡轮研究院,四川绵阳621000

出　　处：《轴承》2022年第3期86-90,共5页Bearing

摘　　要：针对磁悬浮电动机在航空发动机轴承磨合试验中发生的失稳现象,建立转子系统有限元模型进行仿真分析,结果表明电动机失稳转速与转子系统一阶临界转速一致,可通过降低转子系统由于不对中产生的激振力水平确保其平稳跨过一阶临界转速。对转子系统对中方式和轴向载荷加载方式进行优化以改善转子运行状态,并通过试验验证了该技术方案的可行性,改进后采用磁悬浮电动机支承的试验机满足航空发动机轴承性能试验的技术要求,运转平稳,安全可靠。A finite element model of rotor system is established to simulate and analyze the instability of maglev motor during aero-engine bearing running-in test,the results show that the destabilization speed of the motor is consistent with the first-order critical speed of rotor system,and smoothly crossing the first-order critical speed can be ensured by reducing the level of excitation force generated by misalignment of rotor system.The alignment method and axial loading method for rotor system are optimized to improve the operating state of rotor,and the feasibility of technical solution is verified through test.The improved tester with maglev motor support meets the technical requirements of aero-engine bearing performance test,and operates smoothly,safely and reliably.

关 键 词：滑动轴承 磁力轴承 滚动轴承试验机 转子动力学 不对中 临界转速 

分 类 号：TH133.31[机械工程—机械制造及自动化] TH87