A development of rolling bearings with 10nm level in non-repetitive run-out

在本研究中，完成了基础研究的发展与10纳米级的滚动轴承在非重复跳动。研究结果表明：（1）保持架旋转分量的非重复跳动（NRRO）值主要是由同一轴承中的滚珠直径差引起的。但在长时间测量的情况下，经常观察到保持架旋转的NRRO突然波动。对于这一现象，几何误差并不被认为是一个原因。在本研究中，我们制作了一个可以让润滑状态有意识地改变的仪器，并研究了润滑波动对保持架旋转NRRO的影响。结果表明，润滑波动是保持架转动非零比转速在nm级变化的原因。（2）保持架的旋转频率的NRRO主要是由一个轴承中所包含的球的直径差异引起的。此外，据了解， ...更多信息 滚珠的轨道间距不相等会影响保持架的旋转频率的NRRO。但这方面的定量研究却很少。在本研究中，我们探讨了不相等的轨道间距的球保持架旋转的NRRO有意拔出球的影响。澄清了如果球的轨道间隔之间的差异大，则保持架的旋转频率的NRRO变大。（3）保持架转数的NRRO值主要是由装在轴承中的球的直径差引起的。此外，当多个球具有直径差时，保持器旋转的NRRO值被认为随球的位置而变化。在本研究中，我们从理论上分析了保持架旋转的NRRO值，考虑到直径差异和安装在轴承中的球的位置。因此，可以清楚地看出，在滚珠的所有位置计算的保持架旋转分量的平均值随着滚动轴承中滚珠数量的增加而减小。少

In this research, the fundamental research was accomplished for a development of rolling bearings with 10 nm level in non-repetitive run-out. The results are summarized as follows ;(1)The non repetitive run-out(NRRO) value of the components of cage rotation is mainly caused by the diameter differences of balls contained in one bearing. But in case of measuring NRRO for a long time, it was often observed that the NRRO of retainer rotation fluctuated suddenly. As for this phenomenon, geometric errors were not regarded as a cause. In this research, we produced the instrument which could let a lubrication state change intentionally and investigated the influence of lubrication fluctuation on the NRRO of retainer rotation. It was cleared that the lubrication fluctuation was the cause of the change of the NRRO of retainer rotation in nm level.(2)The NRRO of rotational frequency of the cage is mainly caused by the diameter differences of balls contained in one bearing. In addition, it was kno … More wn that the unequal orbital intervals of balls could influence the NRRO of rotational frequency of the cage. But there were few quantitative studies about this. In this research, we investigated the influence of the unequal orbital intervals of balls on the NRRO of retainer rotation by pulling out balls intentionally. It was clarified that the NRRO of rotational frequency of the cage became large if the difference between orbital intervals of balls was large.(3)The NRRO value of retainer revolution is caused mainly by the diameter differences of balls mounted in a bearing. Additionally, when more than one ball has diameter difference, the NRRO value of retainer revolution is believed to vary with the location of balls. In this research, we theoretically analyzed the NRRO value of retainer revolution considering the diameter differences and location of balls mounted in a bearing. Consequently, it is clarified that the mean value of the retainer revolution component calculated in all locations of balls decreased with increasing number of balls in a rolling bearing. Less