空气轴承支撑的燃料电池离心空压机转子动力学分析  

Calculation and Analysis of Air Bearing Centrifugal Compressor Rotor Dynamics for Fuel Cells

作　　者：靳彩妍 徐方程 吴孟龙 范俊岩 辛军 JIN Caiyan;XU Fangcheng;WU Menglong;FAN Junyan;XIN Jun(ISEM Technologies(Shanghai)Co.,Ltd.,Shanghai 201703,China;School of Control Science and Engineering,Dalian University of Technology,Dalian Liaoning 116024,China;Key Laboratory of Intelligent Control and Optimization for Industrial Equipment(Dalian University of Technology),Ministry of Education,Dalian Liaoning 116024,China)

机构地区：[1]奕森科技(上海)有限公司,上海201703 [2]大连理工大学控制科学与工程学院,辽宁大连116024 [3]大连理工大学工业装备智能控制与优化教育部重点实验室,辽宁大连116024

出　　处：《汽车零部件》2020年第11期6-9,共4页Automobile Parts

基　　金：国家自然科学基金项目(11702050)。

摘　　要：根据燃料电池系统对空压机提出高压比、大流量、高效率的需求,设计了高转速两级压缩电动离心式空压机,采用动压空气轴承作为转子的支撑,利用DyRoBes软件DyRoBes-Rotor转子动力学软件包,对燃料电池离心空压机转子动力学特性进行了分析。分析结果表明:空压机的一阶弯曲临界转速为3168 Hz,远高于转子系统的最高运行转速的30%;对应的振动模态为弯曲模态,在运行转速范围内轴心轨迹总跳动比值小于20%,最大轴承受力为60 N,远低于轴承承载能力100 N,为轴承和转子进一步优化提供参考。According to fuel cell system making the requests for compressor with high pressure ratio,large mass flow and high efficiency,the high speed,electric,two stage centrifugal compressor was designed.The centrifugal compressor rotor use the foil air bearing to support.Using the DyRoBes software package,the stability of the compressor rotor system was analyzed.The results show that the first-order bending critical speed of the air compressor is 3168 Hz,which is much higher than 30%of the maximum operating speed of the rotor system.The corresponding vibration mode is bending mode.The total runout ratio of the axis track is less than 20%within the operating speed range,and the maximum bearing force is 60 N,which is far lower than the bearing capacity of 100 N,it provides design guidance for bearing and rotor further optimization.

关 键 词：燃料电池 离心空压机 空气轴承 转子动力学 

分 类 号：TK91[动力工程及工程热物理]