Abstract: To increase the service life, prevent the premature failure and improve the reliability of rolling bearings used in the missile turbojet engines, based on the analyses of all steel bearing failure with related working conditions,a kind of hybrid ceramic bearing which performances were compared with those of all steel bearings through quasi-static mechanics analyses were developed. Bench tests showed that ceramic bearings have a benign failure mode of gradual fatigue instead of catastrophic failures of thermal instability, seizure or dead lock which are very common for all steel bearings under the working conditions of high speed, high temperature, heavy load and limited lubricant. So ceramic bearings can totally meet such stringent demands in missile turbojet engines.

Key words: Turbojet engine;Failure analysis;Ceramic;Aircraft bearing;Non metallic bearing

摘要： 为延长弹用涡喷发动机轴承的寿命、避免过早失效和提高其可靠性 ,在分析全钢轴承恶性失效形式的基础上 ,根据工况对轴承性能的要求研制了混合式陶瓷轴承 ,用拟静力学分析方法对比分析了全钢轴承和混合式陶瓷轴承的性能指标 ,台架实验表明了陶瓷轴承以疲劳逐步扩展的良性失效形式为主要失效形式 ,能够克服全钢轴承在高速高温重载限量润滑条件下发生热失稳、咬死等恶性故障 ,对高速恶劣工况有很好的适应性。

关键词: 涡轮喷气发动机;失效分析;陶瓷;航空轴承;非金属轴承