油液中轴承钢球表面展开运动分析  

Analysis on Surface Unfolding Motion of Bearing Steel Ball in Oil

作　　者：赵彦玲[1] 侯新新 向敬忠[1] ZHAO Yanling;HOU Xinxin;XIANG Jingzhong(School of Mechanical and Power Engineering,Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]哈尔滨理工大学机械动力工程学院

出　　处：《轴承》2019年第8期46-50,54,共6页Bearing

基　　金：国家自然科学基金项目(51275140);哈尔滨市应用技术研究及开发资金项目(2016RAXXJ001)

摘　　要：针对轴承钢球在油液下检测时,因绕流阻力影响球面全展开而导致表面缺陷无法全部采集的问题,研究油液中的流场分布和球面展开运动。基于Newton内摩擦定律和黏性流体边界条件,根据钢球在油液中的流线分布以及摩擦盘与钢球在展开位置的接触形式,建立了流场下的油液速度方程和钢球动力学方程,利用仿真分析确定了摩擦盘移动速度、旋转角速度和展开盘孔径是影响钢球表面展开的重要因素。以Ф10.3188mm钢球为例,确定了钢球展开的最优参数组合是摩擦盘移动速度为36.33~41.52mm/s,旋转角速度为π/6~5π/24rad/s,展开盘孔直径为12.0~13.5mm,验证了理论与仿真的正确性。研究成果量化了钢球表面缺陷检测过程中的运动参数,为高精密轴承钢球的检测提供了理论支持。When the bearing steel ball is inspected in oil, the surface defect is unable to be collected fully due to influence of oil flow resistance on spherical surface unfolding. The flow field distribution and spherical surface unfolding motion in oil are studied. Based on Newton′s internal friction law and boundary conditions for viscous fluid, according to flow line distribution of steel ball in oil and contact form between friction disk and steel ball in unfolding position, the velocity equation of oil and dynamics equation of steel ball under flow field are established. The simulation analysis is used, and the main factors affecting surface unfolding of steel ball are determined as moving speed of friction disk, angular velocity of rotation and hole diameter of unfolding disk. Taking the steel ball of Ф 10.3188 mm as an example, the optimal parameter combination is determined for unfolding of steel ball. The moving speed of friction disk is from 36.33 to 41.52 mm/s, the angular velocity of rotation is from π/6 to 5π/24 rad/s, the hole diameter of unfolding disk is from 12.0 to 13.5 mm, and the correctness of theory and simulation is verified. The research results quantify the motion parameters during steel ball surface defect detection, which provides theoretical support for detection of high precision bearing steel ball.

关 键 词：滚动轴承 油液 钢球 球面缺陷检测 流场分析 数值模拟 

分 类 号：TH133.331[机械工程—机械制造及自动化]