Volume 38 Issue 3
Mar.  2023
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DENG Kaiwen, XIE Pengfei, LIAO Hui, et al. Mechanism of abnormal fluctuation of friction torque of control moment gyro bearing assembly[J]. Journal of Aerospace Power, 2023, 38(3):752-768 doi: 10.13224/j.cnki.jasp.20210424
Citation: DENG Kaiwen, XIE Pengfei, LIAO Hui, et al. Mechanism of abnormal fluctuation of friction torque of control moment gyro bearing assembly[J]. Journal of Aerospace Power, 2023, 38(3):752-768 doi: 10.13224/j.cnki.jasp.20210424

Mechanism of abnormal fluctuation of friction torque of control moment gyro bearing assembly

doi: 10.13224/j.cnki.jasp.20210424
  • Received Date: 2021-08-09
    Available Online: 2022-10-25
  • Based on dynamics analysis of angular contact ball bearing, the nonlinear differential dynamic equations and the theoretical formula of friction torque for the bearing assembly of control moment gyro with revolution-rotation coupling were established. The influences of cage structure, raceway processing accuracy and preload on friction torque characteristics of the bearing assembly of control moment gyro were studied. The mechanism of abnormal fluctuation in friction torque of a certain bearing assembly of control moment gyro was also analyzed. The analysis results showed that the rub-impact between the outer diameter surface of cage and the guide rib of ring, and that between ball and cage pocket were main factors that triggered the abnormal fluctuation in friction torque of the bearing assembly of control moment gyro. A reasonable original radial clearance of bearing can effectively eliminate the rubbing phenomenon between the outer diameter surface of bearing cage and the guide edge of the ring, and avoid obvious abnormal fluctuation in friction torque of the bearing assembly of control moment gyro.

     

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