Study on the Lubrication State of Frictional Pairs with Different Surface Roughness Based on Stribeck Curves
Study on the Lubrication State of Frictional Pairs with Different Surface Roughness Based on Stribeck Curves
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发表时间：
2004
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通讯作者：
H. Ping
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作者：
H. Ping
通过对相关Stribeck曲线的理论分析和薄膜润滑试验，研究了钢球-盘点接触副和钢滑块-盘面接触副的润滑状态。通过改变圆盘转速，得到了薄膜润滑状态下的Stribeck曲线。结果表明，在Stribeck曲线上识别薄膜润滑状态是可行的，薄膜润滑区位于摩擦系数谷附近。薄膜润滑区的出现及其范围与阀瓣的表面粗糙度密切相关。也就是说，由于圆盘的表面粗糙度较小，摩擦副很容易达到薄膜润滑状态，而由于圆盘的表面粗糙度较大，很难区分薄膜润滑状态。此外，圆盘表面粗糙度较小的摩擦副的Stribeck曲线显示出较宽的摩擦系数谷和薄膜润滑区。
The lubricating states of a steel ball-disc point contact pair and a steel sliding block-disc plane contact pair were investigated based on theoretical analysis of the relevant Stribeck curves and thin film lubrication test. Thus the Stribeck curves involving the thin film lubrication regime were obtained by changing the rotary speed of the disc. As the results, it was feasible to recognize thin film lubrication regime on the Stribeck curves, and the thin film lubrication zone was near to the friction coefficient valley. The appearance of the thin film lubrication regime and its range was closely dependent on the surface roughness of the disc. Namely, it was easy for the frictional pair to reach thin film lubrication regime as the disc had a smaller surface roughness, while it was hard to differentiate the thin film lubrication regime as the disc had a larger surface roughness. Moreover, the Stribeck curve for the frictional pair of a smaller disc surface roughness showed a broader frictional coefficient valley and thin film lubrication zone as well.