采用标准ASTMD4172-82四球磨损试验的变分法研究润滑滑动表面的磨损速率。试验期间,使用一个线性的可变差分传感器(LVDT)和一个数据采集系统对球之间的相对位移进行连续地记录。根据LYDT 的输出量可计算磨痕直径(WSD)的变化及磨损率。研究工作表明,从20h 试验计算得到的WSD 与11个单独试验测量得到的WSD 值有很好的一致性。这些数据的分析结果,能提供评定润滑剂性能的几个有用的参数。 The wear rate of the lubricated sliding surfaces was studied using the variational method of the standard ASTMD4172-82 four-ball wear test. During the test, a linear variable differential sensor (LVDT) and a data acquisition system were used to record the relative displacements of the balls continuously. The change in wear scar diameter (WSD) and the wear rate can be calculated from the output of LYDT. Research shows that the WSD calculated from the 20h test is in good agreement with the WSD values ​​measured from 11 separate experiments. The analysis of these data provides several useful parameters for evaluating lubricant performance.