基于因素分离法的脂润滑深沟球轴承摩擦研究*

滚动轴承的摩擦是在一个复杂的系统中由多种因素共同作用而产生的。为研究轴承中各类摩擦副的摩擦占总摩擦的比重，以矿山带式运输机托辊常用的6204脂润滑深沟球轴承为例，分析脂润滑深沟球轴承摩擦阻力的主要来源，将轴承摩擦分为滚动摩擦、滑动摩擦、黏性摩擦以及密封摩擦，用因素分离法分别开展同批次6204脂润滑深沟球轴承的带密封、无密封、无润滑以及微润滑条件下的摩擦实验，通过逐次剥离部分因素分析各摩擦分量对摩擦总量的影响。实验结果表明：在实验的载荷和转速条件下，密封摩擦占轴承全部摩擦的5%~18%，黏性摩擦占无密封轴承总摩擦的64%~85%；除去这些黏性摩擦之外，滑动摩擦也是滚动轴承摩擦中的重要分量。

Study on Friction of Grease Lubricated Deep Groove Ball Bearing by Factor Separation Method

The friction of rolling bearing is produced by many factors in a complex system.In order to study the proportion of the friction of various friction pairs in the total friction of bearings,taking the 6204 grease lubricated deep groove ball bearings commonly used in idles of mine belt conveyor as an example,the main sources of friction resistance of grease lubricated deep groove ball bearings were analyzed,and the bearing friction was divided into rolling friction,sliding friction,viscous friction and sealing friction.The friction experiments were carried out under sealed,unsealed,unlubricated and micro-lubricated conditions of the same batch of 6204 grease lubricated deep groove ball bearings,and the influence of each friction component on the total friction was analyzed by peeling off some factors successively.The experimental results shows that under the conditions of experimental loads and speeds,the sealing friction accounts for about 5% to 18% of the total friction of the bearing,and the viscous friction accounts for 64% to 85% of the total friction of the unsealed bearing.In addition to these viscous frictions,the sliding friction is also an important component of the total friction of the rolling bearing.