润滑点接触粗糙表面滑动摩擦因数的实验研究

利用多功能微摩擦试验机,在轻载荷条件下测量了具有横向纹理圆盘表面的摩擦因数,得到了包括流体润滑、混合润滑和边界润滑完整的Stribeck曲线。考虑了载荷和时间对实验结果的影响,对不同粗糙度表面的Stribeck曲线进行了比较。实验的初步结果表明:增加载荷与实验时间,会获得更加稳定的实验结果;表面越粗糙,从混合润滑向流体润滑转换的临界速度越大;表面越光滑,Stribeck曲线的“谷底”越明显。

Experimental Research of Sliding Friction Coefficient of Rough Surface under Lubricated Point Contact

Using universal nano-micro-macro material tester,the friction coefficient of disk surfaces with transverse-texture was measured under conditions of light load.The complete Stribeck curve,spanning hydrodynamic,mixed and boundary lubrication,was obtained.The influence of load and time on the experiment was considered.And the comparison of the Stribeck curves of the different roughness surfaces was conducted.The preliminary results show:the increment of the load and the duration time benefits to the stability of the experiment;the more a surface is rough,the more the critical speed from mixed to hydrodynamic lubrication is large;the more a surface is smooth,the more the valley of the Stribeck curve is obvious.