Effect of geometric imperfections of journal on the performance of micropolar lubricated 4-pocket hybrid journal bearing

Combined influence of geometric imperfections and misalignment of journal on the performance of four pocket hybrid journal bearing

The present paper investigates the influence of journal’s geometric imperfections on the performance of capillary compensated two-lobe hybrid journal bearing system. Different geometric imperfections of journal, viz. barrel, bellmouth and circumferential waviness have been included in the study. A parameter called offset factor has been included in the analysis which distinguishes between two lobe and circular journal bearing. Further, the Reynolds equation has been modified by using power law model in order to deal with non-Newtonian effect of the lubricant. The numerically simulated results indicate that non-circularity of bearing and barrel shape irregularity significantly increase the values of S¯zz,C¯zz and ω¯th by a factor 36.47, 51.34 and 18.52%, respectively, with respect to the base bearing (circular ideal journal bearing) operating with non-Newtonian lubricant.

Two-lobe geometrically imperfect hybrid journal bearing operating with power law lubricant

Effect of geometrical irregularities on the performance of a misaligned hybrid journal bearing compensated with membrane restrictor

The effects of three-dimensional irregularities on the performance characteristics of turbulent journal bearing

In the theoretical analysis of porous bearings the journal has so far been assumed to be ideal, that is perfectly cylindrical. In the present analysis the geometric irregularities of the journal, s...

R Raman

Papers

The Effects of Geometric Irregularities of Journals on the Performance of Porous Bearings