凹坑织构位置对81107轴承摩擦磨损性能的影响

Influence of Pits Position on the Friction and Wear Performance of 81107 Bearings

通过在机械零件表面进行织构化来改善其摩擦磨损性能的方法已经得到广泛的认可,但其在滚动轴承的应用与研究较少。考虑到滚子与滚道接触区域的内外侧应力较大而中间位置应力相对较小,在81107轴承的轴圈上分别设计并制备了1/4内侧、1/4外侧、1/2内侧、1/2外侧、3/4内侧、3/4外侧、双侧以及全织构等8种不同位置分布的凹坑织构化试样,并利用MMW-1A型万能摩擦磨损试验机、三维非接触式形貌仪和电子天平等设备进行了试验和表征。结果表明:外侧分布织构试样的摩擦磨损性能比内侧的好;1/4外侧分布试样的摩擦磨损性能最好。与光滑轴承相比,磨损量降低了16%,平均摩擦系数降低了47%。这将为滚动轴承的滚道设计和优化提供重要参考。

The method of improving the friction performance by texturing the surface of mechanical parts has been widely recog⁃nized,but its application and research in rolling bearings are few.It is considering that the inner and outer stresses in the contact area between the roller and the raceway are relatively large and the stress in the middle position is relatively small.In this paper,A variety of texture samples with different distribution of pits with 1/4 inside,1/4 outside,1/2 inside,1/2 outside,3/4 inside,3/4 outside,both sides and full texture are designed and prepared on the shaft ring of 81107 bearing.Experiments and characteriza⁃tions were carried out using MMW-1A universal friction and wear testing machine,three-dimensional non-contact profilometer and electronic balance equipment.The results show that the friction and wear performance of the outer texture sample is better than the inner one;the 1/4 outer texture sample has the best friction and wear performance.Compared with smooth bearings,the amount of wear is reduced by 16%,and the average coefficient of friction is reduced by 47%.This will provide an important refer⁃ence for rolling bearing raceway design and optimization.