光纤旋转连接器具有传输容量大、带宽宽、电磁兼容性良好、体积小、质量轻、能耗低和噪声小的优点,在雷达装备上得到大量广泛应用。针对某型光纤旋转连接器在实际使用过程中,有多只出现光路插入损耗变大或光路不通问题,对光纤旋转连接器的支承轴承进行了额定寿命计算,分析了轴承失效的原因。从轴承选型、加大支承轴承间的中心距、缩小转子受力点与支承轴承间的中心距三个方面采取措施对光纤旋转连接器进行了设计改进。改进明显改善了轴承的受力情况,大幅提高了轴承的预期寿命,从而提高了光纤旋转连接器的可靠性。

Taking advantages of large transferring capacity, wide bandwidth, excellent electromagnetic compatibility, small size, light weight, low energy consumption and small noise, fiber optic rotary joint (FORJ) has been widely used in radar facilities. However, multiple FORJs suffered from increased insertion loss or connection failure in actual use. In order to tackle this issue, rating life of the supporting bearing was evaluated, the reason of premature failure was further analyzed. Several design improvements for FORJ were proposed, including appropriate bearing model specification, lengthened bearing center distance, and narrowed distance to rotor pressure point. These measures could improve the stress condition of bearing, resulting in longer expected life of bearing and better reliability of FORJs.

TN253