双跨转子系统油膜失稳的数值仿真与试验研究  

Numerical Simulation and Experiment Study on Oil Film Instability of Two-span Rotor System

作　　者：罗跃纲 徐昊 王鹏飞 王晨勇 付豪 Luo Yuegang;Xu Hao;Wang Pengfei;Wang Chenyong;Fu Hao(College of Mechanical and Electronic Engineering,Dalian Minzu University,Liaoning Dalian 116600,China;State Key Laboratory of Tribology Intelligent Perception and Advanced Control of State Ethnic Affairs Commission,Dalian Minzu University,Liaoning Dalian 116600,China)

机构地区：[1]大连民族大学机电工程学院,辽宁大连116600 [2]大连民族大学智能感知与先进控制国家民委重点实验室,辽宁大连116600

出　　处：《机械科学与技术》2020年第11期1698-1704,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51875085);辽宁省自然科学基金项目(20170540205,20180551073)资助。

摘　　要：本文以双跨转子试验台为研究对象进行数值仿真与试验测试以模拟实际机组的油膜失稳情况。在数值计算方面,基于有限元法,利用Capone圆轴承油膜力模型建立试验台的动力学模型,对比分析了不同转速下偏心量与圆盘质量的影响规律。试验方面通过试验台改变圆盘偏心量与圆盘质量对转子系统的影响进行分析,并与仿真结果进行比较。结果表明:适当增大偏心量与转盘质量后一定程度上抑制了油膜振荡对系统运转的影响,且油膜振荡发生会延后,但工频幅值会升高。这些故障特征为今后识别油膜失稳提供一定的理论与实际依据。The double-span rotor test-bed was taken as the research object for numerical simulation and experimental test to simulate the oil film instability of the actual unit.From the numerical calculation,the dynamic model of the test-bed was established with the oil film force model of Capone circular bearing,based on the finite element method,and the effects of eccentricity and disc mass at different rotating speeds were compared and analyzed.From the test,the influence of disc eccentricity and disc mass on the rotor system was analyzed and compared with the simulation results.The results show that the influence of oil film oscillation on system operation is restrained to some extent by properly increasing eccentricity and turntable mass.The oil film oscillation will be delayed.But the power frequency amplitude will increase.Theoretical and practical bases are provided by these fault features for identifying oil film instability in the future.

关 键 词：油膜失稳 试验 动力学特性 故障诊断 

分 类 号：TH165.3[机械工程—机械制造及自动化]