Analysis of liquidlubricated herringbone grooved journal bearings

Numerical studies are carried out to investigate the liquidlubricated herringbonegrooved journal bearings HGJBs performance such as the pressure and cavitation distribution, load capacity and attitude angle, stability, etc.. Symmetrical and nonsymmetrical HGJBs are studied, respectively, and the herringbone grooves' influence on the stability of HGJBs is analyzed carefully. It was found that the maximum pressure and load capacity increase with the increase of eccentricity ratio while the attitude angle decreases with the increase of eccentricity ratio. The cavitation may occur in the fluid film of journal bearings while the eccentricity ratio increases to some critical value. The area of cavitated region increases with the increase of the eccentricity ratio. For nonsymmetrical HGJBs, the pressure and cavitation distribution is asymmetrical oo.