电机形位误差对深沟球轴承疲劳寿命的影响
Influence of Shape Error and Position Error of a Motor on Fatigue Life of a Deep Groove Ball Bearing

为研究电机加工误差和装配误差对轴承寿命的影响规律，建立一种考虑电机形位公差引起轴承套圈倾斜的计算模型，定量计算不同套圈倾斜角引起的接触角度、接触载荷、接触应力、旋滚比和轴承温度的分布。在接触角最高位置，轴承温度、旋滚比和最大接触应力均取得最大值。分析了不同套圈倾斜角度对轴承寿命的影响规律。结果表明，径向游隙为零时，电机形位公差引起的轴承倾斜角在3'以内，深沟球轴承寿命缩减不超过10%。
In order to study the influence of processing error and assembling error on the fatigue life of a deep groove ball bearing, a calculation model of bearing ring tilting caused by the shape error and position error of a motor is established. The contact angle, contact load, contact stress, spin to roll ratio and bearing temperature distribution caused by different tilt angles between inner ring and outer ring is quantitatively calculated. At the position of the highest contact angle, the values of bearing temperature, contact stress and spin to roll ratio are larger than those at other positions. The influence of different inclination angles between the rings on the fatigue life of the deep groove bearing is obtained. The calculation results show that the tilt angle between the rings is within 3 degrees and is caused by the motor's error when the radial clearance is zero and that the fatigue life of the deep groove ball bearing is reduced by less than 10%