内外圈相对倾斜对圆柱滚子轴承寿命的影响

The influence of relative inclination of inner and outer rings on the life of cylindrical roller bearings

采用Romax Designer工程分析软件对某大兆瓦风电机组齿轮箱进行整体建模,应用经典滚动轴承理论和“切片法”基本思想,对齿轮箱输出轴圆柱滚子轴承在不同内外圈相对倾斜情况下的接触应力、修形效果和轴承寿命进行大量分析计算;重点对轴承ISO/TS 16281寿命进行分析,分析内外圈相对倾斜量对ISO/TS 16281寿命的影响以及对未修形和对数修形最佳修形凸度量时两种情况下寿命的影响;还将ISO 281寿命和ISO/TS 16281寿命进行对比。研究结果表明,无论轴承是否修形,内外圈相对倾斜对轴承ISO/TS 16281寿命影响非常大,倾斜量越大,ISO/TS 16281寿命越短,对应的最佳修形凸度量越大,相应修形效果越好,ISO/TS 16281:2008额定寿命提高得越大;在内外圈相对倾斜量相同的情况下,ISO/TS 16281寿命与ISO281寿命相差非常大。研究结果可为圆柱滚子轴承优化设计提供参考。

Using the Romax Designer engineering analysis software to model the overall gearbox of a large MW wind turbine,a large amount of analysis and calculation were conducted on the contact stress,modification effect,and bearing life of the cylindrical roller bearing of the gearbox output shaft under different relative inclinations of the inner and outer rings according to the classic rolling bearing theory and the basic idea of the"slicing method".The focus is on analyzing the ISO/TS 16281 lifespan of bearings,analyzing the impact of the inclination of the inner ring relative to the outer ring on the ISO/TS 16281 lifespan,and the impact on the lifespan of bearings under the optimal convex measurement of unmodified and logarithmic modification.The ISO 281 lifespan and ISO/TS 16281 lifespan are also compared.The research results indicate that regardless of whether the bearing is modified or not,the inclination of the inner ring relative to the outer ring has a significant impact on the ISO/TS 16281 lifespan of the bearing.Moreover,the larger the inclination,the shorter the service life of ISO/TS 16281,and the larger the corresponding optimal modification convex magnitude,the better the corresponding modification effect,and the greater the increase in the rated service life of ISO/TS 16281:2008.Under the same relative inclination of the inner and outer rings,the lifespan of ISO/TS 16281 differs significantly from that of ISO 281.The research results can provide reference for the optimization design of cylindrical roller bearings.