Behavior of EHL Films in Reciprocating Motion
Behavior of EHL Films in Reciprocating Motion
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DOI：
10.1299/jsmec1993.38.558
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发表时间：
1995-09
期刊：
影响因子：
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通讯作者：
H. Nishikawa;Kohtaroh Handa;M. Kaneta
中科院分区：
文献类型：
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作者：
H. Nishikawa;Kohtaroh Handa;M. Kaneta
本文用光学干涉技术研究了钢球与振动玻璃盘之间形成的弹流润滑膜的特性，并与单向条件下的实验结果进行了比较。还测量了表面牵引力。接触区域中的膜轮廓周期性地呼吸，因为楔入和挤压作用不是同相的。在纯滑动的往复运动中，夹在行程末端的两个表面之间的厚油膜以约为玻璃盘速度的一半的速度向出口侧移动。在短行程和高频率的条件下，在下游产生的气泡导致下一个行程的缺油，从而使EHL膜崩溃。在全弹流状态下，中心油膜厚度和行程中心处的表面牵引力与单向状态下的基本相同。油膜的性质类似于非牛顿流体，因此油膜的性质随油膜和运动类型的不同而不同。
The behavior of elastohydrodynamic lubrication(EHL) films formed between a steel ball and an oscillating glass disk is examined by means of the optical interferometry technique, and the results obtained are compared with those of tests conducted under unidirectional conditions. The surface traction is also measured. The film profile in the contact area breathes cyclically because the wedging and squeezing actions are not in phase. In reciprocation under pure sliding, the thick oil film entrapped between both surfaces at the stroke end moves towards the exist side at about half the velocity of the glass disk. Under conditions of a short stroke and a high frequency, air bubbles produced in the downstream result in oil starvation in the next stroke, so that the EHL film collapses. In the full EHL regime, the central oil film thickness and the surface traction at the stroke center are almost the same as those under unidirectional conditions. It is also found that the oil behaves like a non-Newtonian fluid, and as a result the behavior of EHL films varies with oil and type of motion.