Non-Linear Dynamic Analysis on Hybrid Air Bearing-Rotor System under Ultra-High Speed Condition

The non-linear dynamic behavior of a hybrid air bearing-rotor system is very complicated and requires careful attention when designing to avoid spindle failure, especially under ultra-high speed condition. In this paper, the rotor trajectory of a hybrid air bearing-rotor system is obtained by solvin...

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Bibliographic Details
Published in:Materials 2022-01, Vol.15 (2), p.675
Main Authors: Song, Laiyun, Yuan, Guoqin, Zhang, Hongwen, Ding, Yalin, Cheng, Kai
Format: Article
Language:English
Subjects:
Behavior
Equations of motion
Gas bearings
High speed
Hybrid systems
Journal bearings
Power spectral density
Pressure distribution
Reynolds equation
Rotor-bearing systems
Spindles
Trajectories
Vibration analysis
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Summary:The non-linear dynamic behavior of a hybrid air bearing-rotor system is very complicated and requires careful attention when designing to avoid spindle failure, especially under ultra-high speed condition. In this paper, the rotor trajectory of a hybrid air bearing-rotor system is obtained by solving the unsteady Reynolds equation and motion equations simultaneously. The typical non-linear behavior of hybrid air bearing-rotor systems is illustrated with the analysis of the rotor trajectory, the phase angle, time domain vibration and power spectral density. Furthermore, the influences of the rotor mass, external load, rotating speed and unbalanced mass on the non-linear behavior are investigated. Finally, the effect of structure parameters on the rotor trajectory is studied and the phenomenon under ultra-high speed condition is illustrated, which provides some new guidelines on the ultra-high speed air spindle design.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15020675