Contact of Tapered Roller with Logarithmic Profile
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摘要: 轴承的滚子修形是减小滚子边缘应力集中、提高滚动轴承疲劳寿命的重要措施。本文中建立了圆锥滚子接触的力学模型,依据圆锥滚子与内圈的接触方程,计算分析了接触应力和表层Mi-ses应力分布,并对比讨论了实际载荷大于或小于设计载荷时的接触应力分布和Mises应力场的变化。结果表明:对数修形后的圆锥滚子其端部应力集中情况得到了显著改善;且对于不同载荷的轴承要设计不同的修形量,以避免边缘效应的发生、提高接触疲劳寿命。Abstract: The profile design of the rollers of rolling bearings is an important method that can reduce the stress concentration at the edge of the roller and improve the fatigue life of bearings.The contact model of profiled tapered roller was established,then based on the equations of the problem for contact between roller and inner ring,the distributions of contact stress and Mises stress field and their variations with normal load were examined.The comparison of the distributions of above stress fields show that,for the logarithmic tapered roller,the stress concentration of contact stress and the Mises stress inside subsurface at the roller ends is improved;and that the roller profile and blend value should be designed in terms of load to avoid edge effect and prolong the fatigue life of tapered rollers.
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Key words:
- tapered roller /
- logarithmic profile /
- edge effect /
- Mises stress field
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