The lubrication characteristics of magnetized journal bearings affected by magnetic fluids considering the elasticity of its liner

Abstract

In order to investigate the lubrication characteristics of journal bearings with the elasticity of liner affected by magnetic fluids, a theoretic computation model was developed based on magnetic fluids supporting force parameter ([Formula: see text]) and couple-stress factor ([Formula: see text]). The results indicate that maximum dimensionless pressure peak ([Formula: see text]) of oil-film increases with increase in magnetic fluids supporting force parameter ([Formula: see text]), couple-stress factor ([Formula: see text]) and with decrease in elastic deformation coefficient ( Ce) of the liner. The loading capacity ([Formula: see text]) increases with increase in [Formula: see text], [Formula: see text] and with decrease in Ce particularly in the high eccentricity ratio ( ε); The attitude angle ([Formula: see text]) of S with different [Formula: see text] and [Formula: see text] decreases in a small range of ε at first, and then increases, it increases with the decrease of [Formula: see text] and [Formula: see text], and with the increase of [Formula: see text], theses phenomena are more obvious for [Formula: see text] at low ε and for [Formula: see text] and [Formula: see text] at moderate and high ε; the modified coefficient of friction ([Formula: see text]) decreases with increase in [Formula: see text], [Formula: see text] and with decrease in Ce; the side leakage ( Q) decreases with increase in [Formula: see text], with decrease in [Formula: see text] and with increase in Ce particularly in the low ( ε). Moreover, the increase of elastic deformation coefficient ( Ce) weaken the impacts of [Formula: see text], [Formula: see text] on the increase of [Formula: see text], [Formula: see text],[Formula: see text], and the decrease of [Formula: see text], Q.

Three-Dimensional Thermohydrodynamic Analysis of Journal Bearing Lubricated by Magnetic Fluids with Couple Stresses

“…3 and 5, and using above boundary conditions, the velocity components are obtained as in Eqs. 8, 9 (Hu et al 2022).…”

“…The reported outcomes show that the (Pmax) which represents the maximum pressure is getting increase as both the magnetic force coefficient and the parameter of couple stress increase along the bearing centerline. Hu et al (2022) effect. Considering elastohydrodynamic effect of bearing liner, the results indicated that maximum pressure of oil increases with increase in both magnetic fluids parameter, and couple stress factor.…”

Study of the Tribological Properties of Magnetic Fluid under the Surface Effects with Magnetic-pole Magnetic-groups

“…Under the action of magnetic fields of different intensities and directions, the magnetic and nonmagnetic materials in magnetic fluids move differently in reverse and the density of magnetic fluids [2,3]. Based on this, the study of the law of magnetic fluid variation with the applied magnetic field under the effect of multi-pole magnetic-group is carried out in this paper [4,5].…”