Abstract
Taking the raceway roundness error into account, mechanical characteristics of cross roller bearings (CRBs) were investigated. A static analysis model of CRBs considering the raceway roundness error was established. Based on this model, the rotational accuracy and load distribution of CRBs under constraints of geometry and external loads were derived. The fatigue life of CRBs with roundness error was calculated by applying Palmgren-Miner linear cumulative damage theory. The influence of inner and outer raceway roundness error on the performance of the CRBs, such as rotational accuracy, load distribution, and fatigue life, was studied through the analysis of examples. The results indicate that the influence of roundness error on the rotating inner raceway is more significant than that of roundness error on the nonrotating outer raceway. The roundness error on the rotating inner raceway always degrades the performance of CRBs. However, a proper roundness error on the nonrotating outer raceway can reduce the loads acting on the rollers and thus improve the fatigue life of CRBs. The effect of the roundness error amplitude on the bearing performance is ordinal, whereas the effect of the roundness order on the bearing performance is not in order.
摘要
考虑滚道圆度误差的作用,研究了交叉滚子轴承的力学性能。建立了考虑滚道圆度的交叉滚子轴承静力学模型,在几何形状与载荷共同约束下得到了轴承旋转精度与载荷分布情况。基于Palmgren-Miner 线性累积损伤理论推导了带有滚道圆度误差的交叉滚子轴承的疲劳寿命计算公式。基于上述计算方法,分析了滚道圆度误差对交叉滚子轴承旋转精度、载荷分布以及疲劳寿命的影响规律。结果表明,旋转滚道上的圆度误差对轴承性能影响更大;旋转内滚道上的圆度误差降低了轴承的力学性能。而适当的非旋转滚道上的圆度误差可以减少滚子与滚道间的载荷,从而提高轴承的寿命。圆度误差幅值对轴承性能的影响是有序的,圆度误差波纹度数对轴承性能的影响规律是无序的。
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Project(51775059) supported by the National Natural Science Foundation of China; Project(2017YFB1300700) supported by the National Key Research & Development Program of China
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The overarching research goals were developed by CHEN Bing-kui and LI Chao-yang. LI Chao-yang and HUANG Jian established the models and analyzed the calculated results. CHEN Bing-kui and LI Chao-yang provided funding acquisition. HUANG Jian and LI Chao-yang conducted the literature review and wrote the first draft of the manuscript. HUANG Jian edited the draft of manuscript.
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HUANG Jian, LI Chao-yang, and CHEN Bing-kui declare that they have no conflict of interest.
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Huang, J., Li, Cy. & Chen, Bk. Mechanical behaviors of cross roller bearings with raceway roundness error. J. Cent. South Univ. 28, 2091–2104 (2021). https://doi.org/10.1007/s11771-021-4755-1
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DOI: https://doi.org/10.1007/s11771-021-4755-1