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    粟爽格, 安琦. 内外圈装配过盈量对圆柱滚子轴承力学性能的影响[J]. 华东理工大学学报(自然科学版), 2020, 46(3): 436-444. DOI: 10.14135/j.cnki.1006-3080.20190121002
    引用本文: 粟爽格, 安琦. 内外圈装配过盈量对圆柱滚子轴承力学性能的影响[J]. 华东理工大学学报(自然科学版), 2020, 46(3): 436-444. DOI: 10.14135/j.cnki.1006-3080.20190121002
    SU Shuangge, AN Qi. Influences of Assembly Interference of Inner and Outer Raceways on the Mechanical Properties of Cylindrical Roller Bearings[J]. Journal of East China University of Science and Technology, 2020, 46(3): 436-444. DOI: 10.14135/j.cnki.1006-3080.20190121002
    Citation: SU Shuangge, AN Qi. Influences of Assembly Interference of Inner and Outer Raceways on the Mechanical Properties of Cylindrical Roller Bearings[J]. Journal of East China University of Science and Technology, 2020, 46(3): 436-444. DOI: 10.14135/j.cnki.1006-3080.20190121002

    内外圈装配过盈量对圆柱滚子轴承力学性能的影响

    Influences of Assembly Interference of Inner and Outer Raceways on the Mechanical Properties of Cylindrical Roller Bearings

    • 摘要: 通过力学分析,结合厚壁圆筒理论,提出了一种在考虑内外圈装配过盈量情况下滚动体与滚道间接触应力以及轴心轨迹的计算模型,并且构建了一种在不同的游隙数值条件下对此模型进行数值计算的算法,实现了对圆柱滚子轴承每一个滚子受力的精确计算。利用所建立的算法,以圆柱滚子轴承NU306E为算例,研究了内外圈装配过盈量对接触应力与轴心轨迹的影响规律,绘制了最大接触应力以及轴心轨迹的变化曲线。研究表明:当初始游隙保持不变时,随着过盈量的增大,滚子接触应力的范围逐渐增大,滚子接触应力的最大值逐渐减小,当过盈量增大到一定程度时,滚子在整个圆周上都受力,滚子接触应力的最大值显著增大;当保持轴承装配过盈量不变时,随着初始游隙的增大,滚子接触应力的范围逐渐减小,接触应力的最大值逐渐增大。

       

      Abstract: Cylindrical roller bearings are widely used in mechanical equipment. The inner and outer rings of such bearing are usually tightly fitted when assembling, which results in expansion of the inner ring and shrinkage of the outer ring, thus affecting the mechanical properties of the bearing. In this paper, based on the mechanical analysis and the thick-walled cylinder theory, a calculation model is established, which can be used to calculate the contact stress between the roller and raceways and calculate the axial orbit with considering the assembly interferences of inner and outer rings. An algorithm for numerical calcultion based on this model under different clearance values is constructed, and the force of each roller of cylindrical roller bearings can be accurately calculated. Upon using the established algorithm, taking the cylindrical roller bearing NU306E as an example, influences of assembly interferences of inner and outer rings on the contact stress and the axial orbit are studied, and curves of the maximum contact stress and the axial orbit are drawn. It is found that when the initial clearance keeps constant, as the interference increases, the range of the contact stress of the roller increases gradually. The maximum value of the contact stress of the roller decreases gradually. When the interference increases to a certain extent, the roller is stressed over the entire circumference, and the maximum value of the roller contact stress is increased significantly. When the bearing assembly interference keeps constant, as the initial clearance increases, the range of the roller contact stress decreases gradually, and the maximum value of the contact stress increases gradually.

       

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