低温高速永磁电机转子屏蔽套的设计及强度分析  

Design and strength analysis of rotor shielding sleeve of low temperature and high speed permanent magnet motor

作　　者：董传友[1] 金鹏飞 杨子豪 杨志飞 李星锐 DONG Chuanyou;JIN Pengfei;YANG Zihao;YANG Zhifei;LI Xingrui(School of Electrical and Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150080

出　　处：《电机与控制学报》2023年第7期111-121,共11页Electric Machines and Control

基　　金：军民融合专项(JMRH2018XM03)。

摘　　要：针对低温泵用高速永磁电机的屏蔽套厚度和过盈量的确定问题,从电机转子强度的角度分析,提出了以厚度最小化作为设计目标的研究方法。首先确定转子各材料的强度约束准则,建立电机转子的三维有限元强度计算模型,并通过解析法验证,分析了分别采用钛合金和碳纤维作为屏蔽套材料时不同转速和温度下转子应力的变化规律,探究各材料的失效极限;并以此作为约束条件,确定了符合强度要求的屏蔽套厚度及过盈量,最终得到的碳纤维屏蔽套较钛合金的厚度更小,在强度方面更具优势。该屏蔽套的设计方法在满足转子强度的前提下,使得材料尽限利用,对低温泵用电机和高速电机的屏蔽套设计具有参考意义。In order to determine the thickness and interference of the shield sleeve of the high-speed per-manent magnet motor for cryopump,a research method with the minimum thickness as the design objec-tive was proposed from the angle of motor rotor strength.Firstly,the strength constraint criteria for each material of the rotor were determined,and a three-dimensional finite element strength calculation model for the motor rotor was established.Through analytical verification,the changes in rotor stress at different speeds and temperatures were analyzed when titanium alloy and carbon fiber were used as shielding mate-rials,and the failure limits of each material were explored;and using this as a constraint,the thickness and interference of the shielding sleeve that meets the strength requirements were determined.The resul-ting carbon fiber shielding sleeve has a smaller thickness than titanium alloy,and has more advantages in strength.On the premise of satisfying the rotor strength,the design method of the shielding sleeve makes the material be used as limited as possible,which has reference significance for the shielding sleeve de-sign of motors for cryopump and high-speed motors.

关 键 词：低温泵用电机 高速永磁电机 转子屏蔽套 转子强度分析 厚度最小化设计 

分 类 号：TM355[电气工程—电机]