Journal
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
Volume 234, Issue 10, Pages 1618-1634Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/1350650120922110
Keywords
Aerostatic bearing; journal misalignment; dynamic coefficients; stability threshold
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Funding
- National Natural Science Foundation of China [11802175]
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Under misalignment condition, the film thickness distribution of aerostatic journal bearings is changed comparing with condition without misalignment, which results in the change of performances of aerostatic journal bearings. In the paper, the effects of misalignment along two perpendicular directions (along the vertical direction theta (y) and along the horizontal direction theta (x) ) on the dynamic coefficients and stability thresholds of both critical whirl ratio and critical inertial force calculated by the motion equation of rigid rotor-aerostatic journal bearing system are studied comparatively. The results indicate that the dynamic coefficients, critical whirl ratio, and critical inertial force are more sensitive to theta (x) compared with theta (y) . Moreover, the stability threshold of whirl ratio reduces with increasing the misalignment degree, while stability threshold of inertial force increases with increasing the misalignment degree.
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