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对失效轴承进行宏观和硬度检查,对首断件进行断口分析和金相检查,并对收集的金属屑进行能谱分析,认为轴承失效与材料性能无关,轴承在工作过程中受到了非正常应力的作用。还对可能影响轴承正常工作的发动机装配形位公差K11和K12进行了理论分析,结果表明,发动机装配后的轴承偏斜是导致轴承失效的主要原因。
Macro and hardness inspection of the failed bearings, fracture analysis and metallographic examination of the first part, and energy spectrum analysis of the collected metal shavings, that bearing failure has nothing to do with the performance of the material, the bearing in the work process by the abnormal stress Role. A theoretical analysis of the shape tolerances K11 and K12 of the engine assembly, which may affect the normal operation of the bearing, is also carried out. The results show that the bearing deflection after assembly of the engine is the main cause of the bearing failure.