年間 6 号発行
ISSN 印刷: 1940-2503
ISSN オンライン: 1940-2554
Indexed in
THERMOHYDRODYNAMIC ANALYSIS OF A JOURNAL BEARING WITH A MICROGROOVE ON THE SHAFT
要約
In this study, thermohydrodynamic performance of a journal bearing with a microgroove created on the shaft is analyzed. A plain journal bearing is modeled using a computational fluid dynamics (CFD) software package. Navier-Stokes and energy equations are solved. The rotor-stator interaction is treated by using a computational grid deformation technique. The goal is to examine the pressure/temperature distribution in the bearing film. Results are presented in terms of typical bearing parameters as well as flow patterns. Results are also compared to the bearing with a smooth shaft. The effect induced by a microgroove on pressure distribution is explained for different bearing configurations, eccentricities, and microgroove depths. It is shown that the microgroove produces a local drop in pressure which, averaged over one revolution, decreases the load carrying capacity. The load carrying capacity is further decreased by using deeper microgrooves. With thermal effects considered, the microgroove carries more cold lubricant into the warmest regions of the bearing. This effect, more pronounced with deeper microgrooves, is due to a global flow recirculation inside the microgroove, which improves mixing.
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K.P. Lijesh, S.M. Muzakkir, Hirani Harish, Thakre Gananath Doulat, Control on wear of journal bearing operating in mixed lubrication regime using grooving arrangements, Industrial Lubrication and Tribology, 68, 4, 2016. Crossref
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Muchammad M., Tauviqirrahman M., Mario L., Jamari J., Thermo-hydrodynamic analysis of multistep texture effect on the performance of journal bearings through acoustic and tribological characteristics, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 44, 7, 2022. Crossref