脂肪醇润滑下EHD滑动触头的膜厚变化
Film Thickness Changes in EHD Sliding Contacts Lubricated by a Fatty Alcohol
摘要：
本文描述了脂肪醇润滑的弹流接触中形成的异常膜厚特征的外观。通过改变钢球和玻璃盘在球盘式装置中的滑动滚动比来进行实验。月桂醇被用作润滑剂，并且通过光学干涉测量法测量接触区域中的膜厚度。实验结果表明，在纯滚动条件下的膜厚分布仍然是经典的，而膜的形状发生变化时，滑滚比增加。中心接触区域的厚度增加，同时入口和出口膜厚度被修改。此外，当球表面比盘表面移动得更快时观察到的膜形状和在相反情况下获得的膜形状是不同的，即当应用相反符号但相等绝对值的滑动滚动比时。
英文摘要：
This paper describes the appearance of abnormal film thickness features formed in elastohydrodynamic contacts lubricated by a fatty alcohol. Experiments were conducted by varying the slide to roll ratio between a steel ball and a glass disk in a ball-on-disk type device. Lauric alcohol was used as lubricant and film thickness was measured in the contact area by optical interferometry. Experimental results showed that the film thickness distributions under pure rolling conditions remained classical whereas the film shape changed when the slide to roll ratio was increased. The thickness in the central contact area increased and in the same time inlet and exit film thicknesses were modified. In addition, the film shapes observed when the ball surface was moving faster than the disk one and those obtained in the opposite case were different, i.e. when opposite signs but equal absolute values of the slide to roll ratio were applied.
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