Geometry optimization for asymmetrical herringbone grooves of miniature hydrodynamic journal bearings by using Taguchi technique

Abstract

Hydrodynamic bearings (HDBs) have been used for data storage applications because of low friction and shock resistance. However, load capacity of HDB is substantially reduced with a decreasing dimension. Few studies have investigated the behavior of the HDB with its inner diameter smaller than Ø = 2 mm. Therefore, the aim of this study was to efficiently analyze the performance of the miniature journal bearings Ø = 0.6 mm with asymmetrical herringbone grooves. To reduce the number of full-factorial experimental design tests, the Taguchi methodology is used to find out the optimal design parameters of the two-step Herringbone-grooved journal bearings.