电机转轴屈曲失稳分析应用研究  

Analysis and Application of Buckling Instability on Shaft of Motor

作　　者：吴立华 康国坡 黄国豪 李杰诚 李克天 Wu Lihua;Kang Guopo;Huang Guohao;Li Jiecheng;Li Ketian(Robotics Institute,Guangdong Open University(Guangdong Polytechnic Institute),Guangzhou 510091,China)

机构地区：[1]广东开放大学(广东理工职业学院)机器人学院,广州510091

出　　处：《机电工程技术》2023年第8期7-10,共4页Mechanical & Electrical Engineering Technology

基　　金：广东省普通高校重点科研平台项目(2020CJPT008)。

摘　　要：针对某型号电机转轴在冷压入轴工艺过程中转轴可能发生屈曲失稳风险的问题,对电机转轴进行了入轴屈曲分析。首先建立了理论计算模型,计算出了转轴的临界失稳压力,其次运用CAE仿真方法及相关软件,对实际的转轴结构进行了有限元屈曲失稳仿真分析,得到了临界失稳载荷的仿真值,仿真值和理论计算值比较接近,并分析了理论计算值和仿真值的差异原因,最后结合在电机转轴入轴现场试验中得到的实际入轴压力,计算了电机转轴的稳定因数,结果表明该电机转轴在入轴过程中的稳定安全因数满足稳定要求,且安全余量较大,不会发生屈曲失稳,可保证批量生产中也具有良好的稳定性。为电机在研发设计过程中关于转轴的压入稳定性提供了设计和校核指引,可在设计上有效避免电机装配时转轴入轴失稳风险问题。Motor shaft rotation in the process of cold pressing into the shaft process has the risk of buckling instability problems,a buckling analysis is conducted on the motor shaft.Firstly,the theoretical calculation model is established to calculate the axis of the critical buckling pressure.Secondly,using CAE simulation method and related software,finite element buckling instability simulation analysis is conducted on the actual shaft structure,and the simulation value of the critical instability load is obtained.The simulation value is relatively close to the theoretical calculation value,and the reasons for the difference between the theoretical calculation value and the simulation value are analyzed.Finally,based on the actual input pressure obtained in the on-site test of the motor shaft,the stability factor of the motor shaft is calculated.The results show that the stability safety factor of the motor shaft during the input process can meet the stability requirements,and the safety margin is large,without buckling instability,which can ensure good stability in batch production.This provides design and verification guidance for the stability of the shaft during the research and development design process of the motor,which can effectively avoid the risk of shaft instability during motor assembly.

关 键 词：电机转轴 屈曲失稳 临界压力 CAE仿真 

分 类 号：TH123.3[机械工程—机械设计及理论]