Rotor dynamic analysis of small vehicle gasoline turbocharger in semi-floating bearings  

作　　者：张虹 张希 贺娜娜 

机构地区：[1]School of Mechanical Engineering,Beijing Institute of Technology

出　　处：《Journal of Beijing Institute of Technology》2011年第4期502-508,共7页北京理工大学学报（英文版）

基　　金：Supported by Turbocharging Laboratory of Beijing Institute of Technology(1030040610016)

摘　　要：The critical speed and unbalance response of a small vehicle gasoline turbocharger in semi-floating bearing are analyzed.The dynamical characters of semi-floating bush bearing used in small vehicle gasoline turbocharger were summarized by comparing the structure and shaft rigid mode of semi-floating bush bearings with those of floating bush bearings.The rotor model was built.The first,second and third mode of critical speeds of rotor system were computed,and the changes in the compressor or turbine bushing bearing clearances were analyzed.Compared with the experiment data,the accuracy and the rationality of computation model were verified.The unbalance response and time transient rotor response were also computed.The critical speed and unbalance response of a small vehicle gasoline turbocharger in semi-floating bearing are analyzed.The dynamical characters of semi-floating bush bearing used in small vehicle gasoline turbocharger were summarized by comparing the structure and shaft rigid mode of semi-floating bush bearings with those of floating bush bearings.The rotor model was built.The first,second and third mode of critical speeds of rotor system were computed,and the changes in the compressor or turbine bushing bearing clearances were analyzed.Compared with the experiment data,the accuracy and the rationality of computation model were verified.The unbalance response and time transient rotor response were also computed.

关 键 词：ROTOR TURBOCHARGER semi-floating bearing 

分 类 号：U464.135[机械工程—车辆工程]