车用燃料电池空压机高速高温转子结构强度分析

Structural Strength Analysis of High-Speed and High-Temperature Rotor of Air Compressor for Fuel Cell Vehicles

摘要:

针对燃料电池空压机转子设计中存在结构强度和温升破坏风险，通过有限元建模仿真方法，剖析了护套与永磁体间过盈量、护套厚度以及转轴空心孔内径等关键参数对转子受力的影响。结果表明，增加过盈量和护套厚度有利于提升转子强度；同时增大护套厚度并减小空心孔半径有利于转子最高许用工作温度提升；护套和永磁体的应力极值主要受最高温度的影响。

Abstract:

Aimed at the risk of structural strength and thermal damage to the fuel cell air compressor rotor， the key parameters such as the interference between the sleeve and the permanent magnet， the thickness of the sleeve， and the inner diameter of the hollow hole were analyzed using the finite element method and numerical simulation. The results show that increasing the interference and sleeve thickness is beneficial to improving the rotor strength. Increasing the sleeve thickness and reducing the hollow hole radius is beneficial to improving the maximum allowable working temperature of the rotor. The maximum stress of sleeve and permanent magnet is mainly affected by the maximum working temperature.