燃料电池离心式空压机转子临界转速关键影响因素分析  

Analysis of Key Influencing Factors on Rotor Critical Speed of Centrifugal Air Compressor for Fuel Cell Vehicles

作　　者：张智明[1] 潘佳琪 章桐[1] Zhang Zhiming;Pan Jiaqi;Zhang Tong(School of Automotive Studies,Tongji University,Shanghai 201804)

机构地区：[1]同济大学汽车学院,上海201804

出　　处：《汽车工程》2022年第9期1386-1393,共8页Automotive Engineering

基　　金：上海市自然科学基金(22ZR1466800)资助。

摘　　要：鉴于国产燃料电池车用离心式空压机高压比和大流量的进气需求,本文对100000 r/min超高速离心式空压机转子稳定性设计中存在的共振失稳问题建立了复合截面转子-轴承系统模型并进行研究。剖析了增大轴承刚度和缩小轴承跨距时的临界转速提升,以及转子空心结构和温升造成的临界转速降低,并为刚性和柔性转子提出了不同的避震措施。还探讨了大转动惯量的叶轮由于回转效应影响对于高阶临界转速的显著提升作用。研究结果为燃料电池超高速离心式空压机转子和轴承设计提供良好的理论指导和设计参考。In view of demand of the high-pressure ratio and large flow air of centrifugal air compressor for domestic fuel cell vehicle,a rotor-bearing system model with compound cross-section is established to study the resonance instability problem of the rotor stability design for ultra-high-speed air compressor with rated speed of100000 r/min.The paper analyzes the critical speed increase by increasing the bearing stiffness and reducing the bearing span,and the decrease of critical speed by the rotor hollow structure and the temperature rise,and proposes different shock absorption measures for rigid and flexible rotors.In addition,the impeller with large moment of inertia significantly improving the high-order critical speed due to the influence of the rotary effect is discussed.The conclusions can provide theoretical guidance and design reference for the rotor and bearing design of ultra-high speed centrifugal air compressor of fuel cell vehicle.

关 键 词：燃料电池汽车 离心式空压机 转子-轴承系统 临界转速 回转效应 

分 类 号：TM911.4[电气工程—电力电子与电力传动]