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在弹性流体动力润滑实验中,润滑油膜厚度的测量是一项重要的工作,目前测量油膜厚度常用的方法有电容法、电阻法、放电电压法和X射线法等,这些方法在使用时常受到一定的限制,所以,发展新的测量油膜厚度的方法也是弹性流体动力学的重要课题。本文介绍的透射式激光测量油膜厚度的方法是尚未见报导的一种新方法,我们进行了静态实验研究,并对空气间隙、20~#、30~#和70~#机械油进行了测试,其结果的分辨率达0.02μm,取得一定的效果。一、实验装置与工作原理图1是透射式激光测量油膜厚度装置简图,图1中,1是He—Ne激光器,20
In the experiment of elastic hydrodynamic lubrication, the measurement of lubricating oil film thickness is an important work. At present, the commonly used methods for measuring oil film thickness are capacitance method, resistance method, discharge voltage method and X-ray method. These methods are often subject to certain requirements Therefore, the development of new methods to measure the thickness of oil film is also an important issue of elastic fluid dynamics. In this paper, a method of measuring the thickness of the oil film by the transmission laser is a new method which has not yet been reported. We conducted static experimental research and tested the mechanical properties of air gap, 20 ~ #, 30 ~ # and 70 ~ The resolution of the result was 0.02 μm, and a certain effect was obtained. First, the experimental device and working principle Figure 1 is a transmission laser film thickness measurement device diagram, Figure 1, a He-Ne laser, 20