新能源汽车驱动电机轴承噪声分析及改进措施  

Noise Analysis and Improvement Measures of Driving Motor Bearings for New Energy Vehicles

作　　者：孙玉玲 何浩 颜静 邓涛 SUN Yuling;HE Hao;YAN Jing;DENG Tao(Zhejiang Alpha Automobile Technology Co.,Ltd.,Jiaxing 314000,China;Zhejiang Hezhong New Energy Automobile Co.,Ltd.,Jiaxing 314000,China;School of Aeronautics,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]浙江阿尔法动力技术有限公司,浙江嘉兴314000 [2]浙江合众新能源汽车有限公司,浙江嘉兴314000 [3]重庆交通大学航空学院,重庆400074

出　　处：《轴承》2022年第1期57-61,共5页Bearing

基　　金：重庆市技术创新与应用发展专项重点项目(cstc2019jscx-fxydX0028);重庆市教育委员会科学技术研究重点项目(KJZD-K202000701)。

摘　　要：针对新能源汽车驱动电动机噪声大的问题,从新能源汽车中央电动机皮带传动结构的驱动总成形式入手,分析了不同径向载荷和转速下轴承的受力情况,采用西门子LMS便携式振动噪声分析仪对电动机噪声来源进行分析,发现电动机嘀嗒声可能由保持架与钢球碰撞产生。提出采用工程塑料保持架进行降噪处理,对使用不同材料保持架的轴承进行噪声对比,并分析了轴承径向游隙对电动机噪声的影响。结果表明,采用工程塑料保持架及较小游隙的轴承可有效降低新能源汽车驱动电机轴承噪声。Aimed at loud noise of driving motor for new energy vehicles,starting with drive assembly form of belt drive structure of central motor of new energy vehicles,the forces of motor bearings under different radial loads and rotational speeds are analyzed.The noise source of motor is analyzed by portable vibration and noise analyzer,it is found that the ticking sound of motor may be caused by collision between cages and steel balls.Engineering plastic cage is proposed to reduce noise,and the noise of the bearings with cages of different materials is compared.The influence of radial clearance of the bearings on motor noise is analyzed.The results show that the noise is effectively reduced by using the bearings with engineering plastic cage and smaller clearance.

关 键 词：滚动轴承 深沟球轴承 新能源 电动机 噪声 优化设计 工程塑料 径向游隙 

分 类 号：TH133.331[机械工程—机械制造及自动化] U461.4[机械工程—车辆工程]