低速灵敏球轴承摩擦力矩分析

低速灵敏球轴承小而稳定的启动力矩和动态力矩对于导航系统的姿态控制至关重要,其工况通常是低速稀油润滑,黏性摩擦被忽略而重点推导接触区因弹性滞后、自旋及差动滑动引起的摩擦力矩。借助拟静力学分析得到了赫兹接触区纯滚动线的位置,积分求出了自旋及差动滑动引起的摩擦力矩,进而估算出灵敏球轴承的摩擦力矩,为验证所推公式的计算结果将其与相关文献的理论值及试验实测值进行了比较。在数学模型基础上,进一步讨论了轴承内外圈沟曲率因数这一重要结构参数对摩擦力矩的影响。

Analysis of Friction Torque of Sensitive Ball Bearing under Low Speed

The starting friction torque and dynamics friction torque of a sensitive ball bearing under low-speed are much more important factors for the attitude control of navigation system.Generally,its operating condition is under the low-speed and thin oil lubrication,so the viscous friction was usually neglected and the friction torque caused by main influencing factors of elastic hysteresis in rolling,spin of rolling element and sliding friction on contact zone were considered.Based on the models of imitating st...