小微挠性陀螺电机轴承预紧力控制技术  

Control Technology of Bearing Preload of Small and Micro Flexible Gyro Motor

作　　者：蔡曜 司玉辉 王玉琢 郭伟 张岳 屈荣 CAI Yao;SI Yuhui;WANG Yuzhuo;GUO Wei;ZHANG Yue;QU Rong(Xi’an Aerospace Precision Mechatronics Institute,Xi’an 710100,China)

机构地区：[1]西安航天精密机电研究所,西安710100

出　　处：《微特电机》2023年第9期7-13,共7页Small & Special Electrical Machines

摘　　要：针对陀螺电机轴承预紧力难以准确控制,预紧力施加不准确会影响电机质量,进而影响陀螺精度和寿命。基于小微挠性陀螺电机的结构特点,进行预紧力受力分析,阐述其与液浮陀螺电机的不同特点。提出适用于该类型陀螺电机的轴承预紧力控制技术,包括基于定扭矩、定推力的预紧力粗调方法,基于摩擦力矩、惯性时间的预紧力精调方法,以及选配和手工研磨相结合的内、外轴套高度差调整方法。工程实践表明,该技术可以保证轴系零件和装配位置的尺寸精度和形位精度;摩擦力矩、惯性时间在满足工艺技术指标的同时还具有较高的一致性;通过该技术生产的陀螺电机故障率不超过4%。技术有效、可靠,能够保证电机具备优良的性能。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.

关 键 词：轴承预紧力 陀螺电机 挠性陀螺 摩擦力矩 惯性时间 

分 类 号：TM303[电气工程—电机]