燃料电池车用超高速空压机临界转速分析与提高措施  

Analysis and improvement of rotor dynamics for super high-speed air compressors applied in fuel cell vehicles

作　　者：詹剑[1,2] 张智明[1,2] 张娟楠[3] 李昌昊[1,2] 倪玥[1,2] 

机构地区：[1]同济大学汽车学院,上海201804 [2]同济大学新能源汽车工程中心,上海201804 [3]同济大学物理科学与工程学院,上海200092

出　　处：《中国计量大学学报》2017年第2期169-175,共7页Journal of China University of Metrology

基　　金：国家自然科学基金资助项目(No.51405344);国家科技支撑计划资助项目(No.2015BAG06B01);中央高校博士点基金资助项目(No.20130072120041);47期留学回国人员科研启动基金;中央高校业务费(No.1600219247);公路养护装备国家工程实验室开放基金资助项目(No.310825151129)

摘　　要：针对空压机进气增压可提高大功率燃料电池发动机性能和功率密度,但空压机超高速电机转子-轴承系统存在共振失稳乃至断轴的实际工程问题.本文采用有限元法建立空压机高速电机轴承-转子系统动力学模型,基于ANSYS软件对某超高速永磁电机转子进行动力学仿真,分析某燃料电池空压机高速电机转子-轴承系统的临界转速,揭示轴承刚度、轴承位置以及转轴质量等因素对临界转速的影响规律,并提出改善措施.结果显示,增大轴承刚度、适当减小轴承跨距以及减轻转轴的质量可以有效地增加转子轴承系统的临界转速.Higher pressure gas fuel produced by the air compressor can augment the power density and performance of fuel ceil engines, but the rotor bearing system of air compressors may have practical problems of resonance and loss of stability, or even broken shaft damages. The critical speed of the rotor-bearing system was analyzed and the main relevant factors on the air compressor＇s critical speed were studied such as bearing stiffness, bearing position, and the mass of the rotation shaft. Numerical simulation results show that both increasing bearing stiffness and decreasing bearing span and its mass can augment the critical speed of air compressors.

关 键 词：燃料电池空压机 高速转子轴承系统 转子动力学 临界转速 

分 类 号：TH138[机械工程—机械制造及自动化]