| Citation: | JIN Xianming, QIU Ming, ZHANG Jiaming, et al. Combined modification method exploration of roller tangent and raceway full convexity based on optimal convexity ratio for cylindrical roller bearing[J]. Journal of Aerospace Power, 2026, 41（5）：20240549 doi: 10.13224/j.cnki.jasp.20240549
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Considering the problem of uneven stress distribution on the contact line of cylindrical roller bearings, a combined modification method of roller tangent and raceway full convexity was proposed. Based on the established elastohydrodynamic lubrication model of finite line contact, the stress distribution characteristics under this modification method were explored and analyzed, and the calculation method of optimal convexity ratio was also provided (the convexity ratio was defined as the ratio of roller convexity to raceway convexity when roller-raceway was modified simultaneously). The results showed that when using the combined modification method, there was an optimal crown ratio in the joint modification curve. This ratio was determined by the load, total convexity, and the length of the straight busbar. Within this optimal crown ratio, there were three equal extremes of contact stress, and the distribution of contact stress was more uniform. The maximum contact stress was reduced. Furthermore, with the increase of the straight bus length of the joint modification curve, the maximum contact stress initially decreased and then stabilized. These research findings introduced a reference method for the modification design of roller-raceway contact pairs, which can improve the uniformity of contact stress distribution of cylindrical roller bearings.
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