To improve the tribodynamic performance of ball bearings, micro-texturing has been widely used on bearing components and significant beneficial effects by using different shape, size and density of dimples at their contact zone has been reported in literature. However, behaviour of textures in vicinity of the contact zone in machine components particularly in ball bearings, where lubricant/grease is push aside from the contact zone has not been explored yet. Hence, two different configurations of micro-textured inner races (i.e., inner races with large number of circular micro-dimples circumferentially on both sides of the central non-textured zones of 2.2 and 1.0 mm) of a deep groove ball bearing have been fabricated by employing a low power laser marking machine. The performance of these micro-textured bearings (MTBs) possessing textured inner races and conventional outer race have been evaluated by conducting experiments in a test rig designed and fabricated inhouse. Capacitance based electrical method, load sensor, thermocouple and miniature type accelerometer have been employed for measuring film thickness, frictional torque, temperature rise and vibrations respectively at realistic bearing loads (speed: 1.4–5.6 m/s, and loads: pH=1.07–1.70 GPa) and the results were compared with that of a same size conventional bearing (SKF: BB1B 420 206). About 8–27 % improvement in film formation, reductions in overall vibration level (5–36 %), frictional torque (10–35 %) and bulk temperature rise (14–37 %) has been recorded in case of MTBs as compared to the conventional bearing (CB) cases at identical load conditions. Moreover, study on the effect of the positioning of the textures with respect to the contact zone on performance behavior of bearings indicated that the tribological and vibration behavior of MTB-2 (bearing with a micro-textured inner race where, textures were created in vicinity of 1.0 mm central non-textured zone) is better than that of the MTB-1 (bearing with a micro-textured inner race, where textures were created in vicinity of 2.2 mm central non-textured zone) and CB at tested loads and speed range.

中文翻译：

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内圈微观纹理的定位对向心球轴承摩擦动力学性能的影响


为了提高球轴承的摩擦动力学性能，微纹理已广泛应用于轴承部件，文献报道了在接触区使用不同形状、尺寸和密度的凹坑的显着有益效果。然而，机器部件尤其是滚珠轴承中的接触区域附近的纹理行为尚未被探索，其中润滑剂/油脂被推离接触区域。因此，已制造出深沟球轴承的两种不同结构的微纹理内圈（即，在2.2和1.0毫米的中心无纹理区域的两侧周向具有大量圆形微凹坑的内圈）通过使用低功率激光打标机。这些具有纹理内圈和传统外圈的微纹理轴承 (MTB) 的性能已通过在内部设计和制造的测试装置中进行实验进行了评估。基于电容的电气方法、负载传感器、热电偶和微型加速度计分别用于测量实际轴承负载（速度：1.4–5.6 m/s，负载：pH=1.07–）下的膜厚、摩擦扭矩、温升和振动。 1.70 GPa) 并将结果与​​相同尺寸的传统轴承 (SKF: BB1B 420 206) 进行比较。与 MTB 相比，MTB 的成膜性能提高了约 8–27%，总体振动水平 (5–36%)、摩擦扭矩 (10–35%) 和整体温升 (14–37%) 降低了相同负载条件下的传统轴承 (CB) 情况。 此外，关于接触区纹理定位对轴承性能行为影响的研究表明，MTB-2（具有微纹理内圈的轴承，其中纹理在附近创建）的摩擦学和振动行为在测试负载和速度下，1.0 毫米中央非纹理区域）优于 MTB-1（带有微纹理内圈的轴承，其中纹理在 2.2 毫米中央非纹理区域附近创建）和 CB范围。