Analysis of misaligned water-lubricated polymer bearing with axial grooves

Abstract

Purpose The purpose of this paper is to analyze the lubrication behavior of misaligned water-lubricated polymer bearings with axial grooves. Design/methodology/approach A lubrication model considering journal misalignment, bush deformation and grooves is established. In dynamic analyses of shaft systems, bearings are usually simplified as supporting points. Thus, an approach for solving the equivalent supporting point location is presented. The influence of misalignment angle and groove number on film thickness, hydrodynamic pressure distribution, load-carrying capacity and ESP location is investigated. Findings As the misalignment angle increases, the location of the maximum pressure and ESP are shifted toward the down-warping end, and the load-carrying capacity of the bearing decreases. In comparison to the nine-groove bearing, the six grooves bearing has a higher load-carrying capacity and the ESP is located closer to the down-warping end for an equivalent misalignment angle. Practical implications The results of this study can be applied to marine propeller shaft systems and other systems with misaligned bearings. Originality/value A study on the lubrication behavior of misaligned water-lubricated polymer bearings with axial grooves is of significant interest to the research community.

Nonlinear dynamic analysis of multiple grooved water-lubricated journal bearings using attenuation rate interpolation method

“…Cheqamahi et al (2016) established a computational fluid dynamics (CFD) model for a MGWJB with four axial grooves and found that adding grooves causes the increase of bearing eccentricity ratio and decrease of the rate of temperature rise. Lv et al (2019) investigated the lubricant film thickness and pressure of misaligned MGWJBs under different misalignment angles. With the finite element method, Zhao and Zhang (2020) investigated the influence of structure deformation on the lubrication performance of the eight-grooves water-lubricated journal bearing.…”