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采用光干涉技术对高压条件下的界面滑移现象进行了试验研究.通过追踪冲击封油核心的运动位移,实现了对滑移长度的定量测量.结果表明:在纯滑条件下封油核心并不以卷吸速度运动,而是在盘纯滑时小于卷吸速度、球纯滑时大于卷吸速度,从而说明了滑移发生在玻璃盘表面.对封油核心的运动特征进行分析,得出了油膜界面滑移长度及剪应变率.试验分析表明滑移长度随油膜厚度、初始封油压力和润滑油黏度的增加而增加;随速度的增加而呈现减小趋势.
Optical interference technology was used to study the phenomenon of interface slip under high pressure.The quantitative measurement of slippage length was achieved by tracking the movement displacement of impingement oil seal core.The results show that under pure slip conditions, But not at the entrainment speed, but less than the entrainment speed when the disk is purely slippery, and when the ball is purely slippery, it is greater than the entrainment speed, which indicates that the slippage occurs on the surface of the glass disk. The slip length and shear strain rate at the interface of the oil film were obtained.The experimental results show that the slip length increases with the increase of oil film thickness, initial oil seal pressure and oil viscosity, and decreases with the increase of velocity.