涡轮增压器非线性转子系统临界转速分析及其实验验证  

Critical Speed Analysis and Experimental Verification of Turbocharger Nonlinear Rotor System

作　　者：徐慧 钟新利 XU Hui;ZHONG Xin-li(The Engineering Training Centre of Hunan Institute of Technology,Hengyang,China,421002;School of Mechanical Engineering Hunan University of Science and Technology,Xiangtan,China,411201)

机构地区：[1]湖南工学院工程训练中心,湖南衡阳421002 [2]湖南科技大学机电工程学院,湖南湘潭411201

出　　处：《热能动力工程》2020年第11期59-66,共8页Journal of Engineering for Thermal Energy and Power

基　　金：国家级大学生创新创业计划项目(201911528005);湖南省自然科学基金(2020JJ6046);湖南省教育厅重点科研项目(19A127);衡阳市指导性计划项目(S2018F9031017249);机械设备健康维护湖南省重点实验室开放基金项目(201701)。

摘　　要：为比较模态分析法和瞬态升速法求解涡轮增压器临界转速的准确性,分别采用两种方法进行求解。首先分析了滑动轴承线性化的条件,并对其线性化,求解转子系统临界转速,其结果与实验测试结果相差很大;然后,采用瞬态升速法求解转子系统的临界转速,其结果与实验测试结果相差1.6%,能较好吻合。本论文为涡轮增压器转子系统设计校核和故障诊断时选择合适的临界转速分析方法提供了参考。It is an urgent problem to be solved whether the critical speed of turbocharger is solved by modal analysis method or transient speed-up method.This article first analyzes the conditions under which the sliding bearing can be linearized.Then the floating ring bearing is linearized,and the critical speed of the rotor system is analyzed according to the modal analysis method,and the results are very different from the experimental test results.Finally,the critical speed of the rotor system is analyzed according to the transient speed-up method,which is 1.6%different from the experimental test results,which is in good agreement.This paper provides a reference for the selection of an appropriate critical speed analysis method for turbocharger rotor system design verification and fault diagnosis.

关 键 词：涡轮增压器 非线性转子系统 临界转速 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3