关键词: 轴承预紧力, 陀螺电机, 挠性陀螺, 摩擦力矩, 惯性时间

Abstract: It is difficult to control the bearing preload accurately, and the inaccurate application of preload will affect the quality of the motor, and affect the precision and life of the gyroscope. Based on the structural characteristics of the small and micro flexible gyro motor, the preload force analysis was carried out, and the different characteristics between the small and micro flexible gyro motor and the liquid floating gyro motor were expounded. The control technology of bearing preload for the type of gyro motor was put forward, including rough adjustment of preload based on fixed torque and fixed thrust, fine adjustment of preload based on friction torque and inertia time, and adjustment of height difference between
inner and outer bushings combined with manual grinding. The engineering practice shows that the technology can ensure the dimensional accuracy and form accuracy of shafting parts and assembly positions. The friction torque and inertia time have a high consistency while meeting the technical specifications. The failure rate of gyro motors produced by the technology does not exceed 4%. The technology is effective and reliable, and can ensure the motor has excellent performance.

Key words: bearing preload, gyro motor, flexible gyroscope, friction torque, inertia time