A new friction measurement system was built to update an old sliderondisc lubricating film test rig,where the friction force was magnified and transferred to a force sensor through the load level and its pivot bearing.An air bearing was used to support the load level instead of the thrust ball bearing,and the nonlinear region in the relationship of the applied friction and the sensor output was reduced largely,as a result the minimum detectable friction force is decreased to 10 mN from 80 mN.Tests show that the relative error is lower than 5% when the measured friction is larger than 10 mN.The measurement results of a plane slider by this system are in good agreement with the classical lubrication theory,and show the influence of side leakage on the relation of frictionconvergence ratio.The measurement results of a step slider show that the system can distinguish the influence of the molecular structure of lubricating oil and the viscosity index improver on the friction characteristics.
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荆兆刚,郭峰,曾守东.滑块-盘接触油膜润滑摩擦力测量[J].润滑与密封,2019,44(3):48-53. . Measurement of Friction of Oil Film Lubrication in SlideronDisc Contact[J]. Lubrication Engineering,2019,44(3):48-53.