ANALYSIS OF LIQUID-LUBRICATED HERRINGBONE-GROOVED JOURNAL BEARINGS

摘要

Numerical studies were carried out on liquid-lubricated herringbone-grooved journal bearings (HGJBs), to investigate its cavitation distribution, pressure distribution and its leakage. To study the symmetrical and non-symmetrical HGJBs' performance,, the Elrod's cavitation algorithm was introduced, the finite difference discretizing method and the alternating direction implicit method were used for our computations. It was found that the maximum pressure, the load capacity and cavitation region increase with the increase of eccentricity while the attitude angle decreases with the increase of eccentricity. For non-symmetrical HGJBs, the pressure distribution along the groove and the cavitation region in the fluid film is asymmetrical: grooves' depth change causes the grooves' pumping effect changes too; and the grooves' pumping effect increases with the increase of grooves' depth ratios.