摘要
以自主研发的船用涡轮增压器为研究对象,建立考虑非线性油膜力的转子轴承系统动力学模型,进行转子动力学系统仿真计算,得到转子系统的临界转速、非线性振动频谱、轴心运动轨迹。根据轴承油膜发生的特征和不平衡引起的振动对比分析,探讨油膜振荡发生的机理,得到涡轮增压器转子轴承系统的非线性振动特性,了解影响转子系统振动产生的主要因素。进一步研究润滑油进口温度和轴承间隙对涡轮增压器振动特性的影响关系,得到减小增压器转子系统振动的结构设计和优化策略。
Aiming at the rotor dynamic problem of one self-designed marine turbocharger,considering the nonlinear oil-film force effect,a finite element model rotor-bearing system was established.The rotor systems critical speed, nonlinear vibration spectrum and shaft cener＇s orbits were obtained with numerical simulation.Through comparatively analyzing vibration characteristics caused by the nonlinear oil film force and unbalance,the nonlinear dynamic behaviors of the turbocharger rotor-bearing system were studied to explore the main causes of the rotor system vibration.The influences of the inlet lubricating oil temperature and bearing clearance on the system vibration were investigated and the structure design and optimization methods were proposed to reduce the vibration of the turbocharger rotor system.
出处
《振动与冲击》
EI
CSCD
北大核心
2016年第9期213-218,共6页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(51375048)
