| 控制力矩陀螺轴承组件摩擦力矩异常波动机理 |
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| 引用本文： | 邓凯文,谢鹏飞,廖辉,周刚,邓四二.控制力矩陀螺轴承组件摩擦力矩异常波动机理[J].航空动力学报,2023,38(3):752-768. |
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| 作者姓名： | 邓凯文 谢鹏飞 廖辉 周刚 邓四二 |
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| 作者单位： | 1.河南科技大学 机电工程学院，河南 洛阳 471003 |
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| 基金项目： | 国家科技攻关项目（TDGC-JD-19-126-1）； 国家自然科学基金（52005158）； 山东省重大科技创新工程（2020CXGC011003） |
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| 摘 要： | 在角接触球轴承动力学分析基础上，建立了公-自转耦合的控制力矩陀螺轴承组件非线性动力学微分方程组和摩擦力矩理论计算式，开展了轴承保持架结构、滚道加工精度和轴承预紧力等参数对控制力矩陀螺轴承组件摩擦力矩特性的影响研究，分析了某型号控制力矩陀螺轴承组件摩擦力矩异常波动的机理。分析结果表明：保持架外径表面与套圈引导挡边之间碰摩以及钢球与保持架兜孔间碰摩是引起该型号控制力矩陀螺轴承组件摩擦力矩异常变化的主要因素。合理的轴承原始径向游隙可有效消除轴承保持架外径表面与套圈引导挡边之间的碰摩现象，且避免控制力矩陀螺轴承组件摩擦力矩明显异常波动。
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| 关 键 词： | 控制力矩陀螺 轴承组件 摩擦力矩 保持架 碰摩 |
| 收稿时间： | 2021-08-09 |
Mechanism of abnormal fluctuation of friction torque of control moment gyro bearing assembly |
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| Abstract: | 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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