表面波纹度对滑动轴承转子系统稳定性的影响  

Effect of Surface Waviness on Stability of Hydrodynamic Journal Bearing Systems

作　　者：李冰 周德俭[1,3] 徐武彬[2] 张一磊[2] LI Bing;ZHOU Dejian;XU Wubin;ZHANG Yilei(School of Mechano-electronic Engineering,Xidian University,Xi'an 710071;College of Mechanical Engineering,Guangxi University of Science and Technology,Liuzhou 545006;College of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guilin 541004)

机构地区：[1]西安电子科技大学机电工程学院,西安710071 [2]广西科技大学机械工程学院,柳州545006 [3]桂林电子科技大学机电工程学院,桂林541004

出　　处：《机械工程学报》2019年第19期51-59,共9页Journal of Mechanical Engineering

基　　金：广西自然科学基金(2018GXNSFBA281195);广西科技计划(AC16380032);柳州科学研究技术开发(2016C050202,2017BC20201)资助项目

摘　　要：为揭示表面波纹度对滑动轴承转子系统稳定性的影响,建立了考虑表面波纹度的滑动轴承转子系统动力学模型,提出其非线性动力学分析、计算方法,表征出周向表面波纹、轴向表面波纹以及组合表面波纹等不同形式的表面波纹度对系统稳定性等系统特性的影响。研究结果表明,表面波纹度的存在会使系统油膜产生波动,增加系统的能量损失,特别是当Sommerfeld数S<0.2时,表面波纹度对系统能量损失的影响最明显。但它的存在并非都有害,表面波纹度误差的存在会在一定程度上有利于滑动轴承转子系统稳定性及承载特性,且随着波纹幅值的增高,其促进的作用越明显。此外,不同形式表面波纹度对系统特性的影响程度也不同,轴向表面波纹度对系统承载能力的促进作用比周向表面波纹度及组合表面波纹更大,而周向表面波纹度则对系统稳定性及能量损失性的影响作用更明显。当Sommerfeld数S>0.5时,轴向表面波纹度对稳定性的影响较小。To reveal the effect of surface waviness on the stability of hydrodynamic journal bearing systems, a dynamic model of hydrodynamic journal bearing system with the surface waviness error is established. The nonlinear dynamic analysis and calculation method of the hydrodynamic journal bearing systems with the surface waviness is proposed, the effects of different forms of surface waviness such as circumferential surface waviness, axial surface waviness and combined surface waviness on the stability of the system are investigated. The result shows that the existence of the surface waviness makes the oil film of system to wave and increases the energy loss of the system. Especially, when S<0.2, the effect of surface waviness on the energy loss of the system is most obvious. However, the existence of the surface waviness is not all harmful. The surface waviness will promote the stability and the bearing capacity of the system in a certain extent. The greater the corrugation amplitude of surface waveness is, the more obvious the influence level is. Moreover, different forms of surface waviness affect the system characteristics differently. The axial surface waviness promotes the bearing capacity of the system more than the circumferential surface waviness and combined surface waviness. However, the circumferential surface waviness has a more pronounced effect on system stability and energy loss. When S>0.5 axial surface waviness has less effect on stability, but it has an adverse effect on the energy loss of the system. When S at 0.06-0.20, the effect of surface waviness on the energy loss of the system is most obvious;the greater the corrugation amplitude is, the more obvious the influence level is. Moreover, the axial surface waviness promotes the bearing capacity of the system more than the circumferential surface waviness and combined surface waviness. however, the circumferential surface waviness has a more pronounced effect on system stability and energy loss. When S>0.5 axial surface waviness has less effect on

关 键 词：表面波纹度 滑动轴承转子系统 稳定性 承载能力 

分 类 号：TG156[金属学及工艺—热处理]