The Varying Compliance Resonance in a Ball Bearing Rotor System Affected by Different Ball Numbers and Rotor Eccentricities
The Varying Compliance Resonance in a Ball Bearing Rotor System Affected by Different Ball Numbers and Rotor Eccentricities
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DOI：
10.1115/1.4039566
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发表时间：
2018-09
影响因子：
2.5
通讯作者：
R. Yang;L. Hou;Yulin Jin;Yushu Chen;Zhiyong Zhang
中科院分区：
文献类型：
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作者：
R. Yang;L. Hou;Yulin Jin;Yushu Chen;Zhiyong Zhang
变柔振动直接反映了滚动轴承的振动强度，在变柔共振中得到充分体现。此外，本文还定义了轴承振动强度作为轴承振动信息。除了轴承的滚动体数量外，转子偏心也是VC振动的一个必然影响因素。研究了球轴承转子系统的VC共振特性。建立了分析模型，并在较大的转速范围内计算了系统在不同球数和不同转子偏心率下的振动响应。理论分析结果表明，在低速范围内VC振动较为明显，存在VC共振，而在高速范围内VC振动被抑制。一般情况下，VC共振强度随球数的增加而减小，在低速范围内对转子偏心不敏感。最后，建立了球轴承转子实验系统，清晰地检测到VC共振，获得了高质量的轴承振动信息。实验结果与理论结果定性一致。
The varying compliance (VC) vibration directly reflects the oscillation intensity of a rolling bearing, and it can be fully revealed in the VC resonance. Moreover, we define the bearing vibration intensity as the bearing vibration information in this paper. Besides the rolling element number of the bearing, the rotor eccentricity is also an inevitable influencing factor for the VC vibration. This paper focuses on the VC resonance characteristics in a ball bearing rotor system. An analytical model is established, and the vibration responses of the system are calculated in a large speed range with the consideration of different ball numbers and different rotor eccentricities. The theoretical results show that the VC vibration is clearer in low-speed range where the VC resonance exist, while it is suppressed in high-speed range. In general, the intensity of the VC resonance decreases with the increase of ball numbers and is not sensible to the rotor eccentricities in low-speed range. Finally, a ball bearing rotor experiment system is setup, the VC resonance is clearly detected, and the high-quality bearing vibration information is obtained. The experimental results qualitatively agree with the theoretical results.