纯滚动条件下单液滴输运过程的试验观察

发布时间：2018-03-28 17:23

本文选题：油滴　切入点：输运　出处：《润滑与密封》2017年10期

【摘要】：利用光干涉技术观察球-盘接触纯滚动条件下单个液滴的输运过程,分析该过程中润滑油膜的动态建立过程及组成润滑油膜的不同区域。定义铺展系数来定量分析油滴输运过程中液滴尺寸和速度对润滑性能的影响。结果表明:大液滴低速输运时,铺展系数达到70%以上,说明液滴铺展效应有利于维持润滑时间;而当小液滴快速输运时,铺展系数将低于30%,说明液滴铺展受到局限性。实验进一步观察到当液滴较大时,可在入口区形成一个供油油池,油膜形状与经典润滑油膜外形相似;而当液滴较小且卷吸速度较大时会在接触区中心形成带有"凹陷"的油膜外形。
[Abstract]:Optical interference technique is used to observe the transport process of a single droplet under the pure rolling condition of ball disk contact. The dynamic establishment process of lubricating oil film and the different regions of lubricating oil film are analyzed. The influence of droplet size and velocity on lubricating performance is quantitatively analyzed by defining spreading coefficient. The results show that: large amount of oil droplet size and velocity affect lubricating performance. When droplets are transported at low speed, The spreading coefficient is more than 70%, which indicates that the droplet spreading effect is favorable to maintain the lubrication time, but when the small droplet is transported rapidly, the spreading coefficient will be lower than 30, which indicates that the liquid droplet spreading is limited. The experimental results show that the liquid droplet spread is limited when the droplet is large. An oil supply tank can be formed in the inlet area, and the oil film shape is similar to that of the classical lubricating oil film, while when the droplet is small and the entrainment speed is high, the oil film shape with "depression" will be formed in the center of the contact zone.
【作者单位】：青岛理工大学机械工程学院;
【基金】：国家自然科学基金项目(51405525;51775286) 山东省优秀中青年科学家奖励基金项目(BS2014ZZ004)
【分类号】：TH117.22

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