On the Free Vibration of High-Speed Ball Bearing Retainer
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摘要: 通过对航空发动机主轴承保持架自由振动的计算分析,表明:保持架不存在小于751.12 Hz的固有频率;在整体按圆环的规律振动的同时,过梁和侧梁存在弯曲、剪切等局部振型;由于保持架的转动,存在不相等且与转动速度相关的前后行波频率,保持架可能共振的频率数目增多,而保持架又受到多种周期性的干扰,高速转动时更易激发共振,造成破坏,因此在设计中必须对保持架的振动问题给予重视.Abstract: As a basic component of mainshaft ball bearing in aero-engine, retainer vibration plays an important role in the strength and stability of the retainer and the bearing performance. With finite element method, the free vibration performance of the retainer is examined. The results show that: 1)Apart from rigid-body motion, there is no natural frequency less than 751.12 Hz for the examined retainer. 2)With the retainer vibrating like a ring as a whole, it has some local vibration modes of side and across beams. 3)The rotation of the retainer makes its natural frequency, front-and back-moving vibration frequencies unequal with each other, which makes its resonance being excited easier.
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Key words:
- antifriction bearings /
- retainers /
- free vibration
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