摘要
针对空间用高速转子轴承的润滑失效问题,综合考虑接触几何、真实粗糙表面形貌、弹性变形、润滑剂流变特性以及滚珠高速自旋特性等因素的影响,建立角接触球轴承的混合润滑统一模型;分析转速、载荷、真空、高低温等工况环境条件对轴承微观传动界面接触与润滑特性的影响规律,并针对算例给出各种润滑状态之间的临界转速。结果表明:随着转速的提高,轴承接触界面润滑状态逐渐改善;除了极低转速,轴承接触界面压力峰值总体随载荷增大而增加;油膜厚度随着大气压强的增大而增大,界面压力峰值随着大气压强的增大而减小;油膜厚度随着温度的增加而减小,界面压力随温度的升高而增大;低速条件下离心力、微重力引起的入口区域乏油对润滑特性影响较小。
Aimed at the lubrication failure problem of high speed rotor bearing in space environment,a unified model of mixed lubrication analysis for angular contact ball bearings was established,considering the influence of contact geometry,real rough surface morphology,elastic deformation,rheological properties of lubricant and high-speed spin characteristics.Based on the model,the influences of rotating speed,load,vacuum,high and low temperature on bearing micro-drive interface contact and lubrication characteristics were analyzed,and the critical rotate speed for conversion among various lubrication states was given according to an example. The conclusions include that,with the increase of speed,the lubrication state in the contact interface of bearing is gradually improved; The pressure peak in the contact interface of bearing is increased as the load rises overall except at the extremely low rotate speed; As the atmospheric pressure increases,the film thickness is increased while the pressure peak of interface is decreased; The film thickness is decreased as the temperature increases and as the rotate speed rises; Under the low speed condition,the inlet oil starvation caused by centrifugal force and microgravity has minor effects on lubrication properties.
作者
刘守文
刘振春
黄首清
黄小凯
李俊阳
刘文根
LIU Shouwen;LIU Zhenchun;HUANG Shouqing;HUANG Xiaokai;LI Junyang;LIU Wengen(Beijing Key Laboratory of Environment ＆ Reliability Test Technology for Aerospace Mechanical ＆ ElectricalProducts,Beijing Institute of Spacecraft Environment Engineering,Beijing 100094,China;State Key Laboratoryof Mechanical Transmissions,Chongqing University,Chongqing 400044,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2018年第6期76-80,95,共6页
Lubrication Engineering
基金
国防科工局技术基础科研项目(JSZL2015203B009)
装备预先研究项目(41402010103)
关键词
高速转子轴承
多应力
混合润滑
high-speed rotor bearing
multi-stress
mixed lubrication
