Static analysis of hydrostatic conical bearings using flow resistance network method

Abstract

Purpose -This paper aims to study the static characteristics of the hydrostatic conical journal bearings by utilizing single-action membrane restrictors to compensate the working pressures of recesses. Design/methodology/approach -The flow resistance network method is used to analyze the influences of load capacity and static stiffness of bearing with the design parameters, including the number of recesses, radial eccentricity ratio, axial displacement ratio, restriction constant, membrane compliance, length-diameter ratio, circumferential land width ratio, axial land width ratio and half of cone angle. Findings -This study shows the infinite stiffness of the oil produced in the first and second recesses while single-action membrane restriction constant of 2 and 3, respectively, as well as in the fourth recess while single-action membrane restriction constant of 0.01 and 0.1, respectively. Research limitations/implications -This article provides the hydrostatic conical bearings in static and unbiased states for analyses of design parameters. The analyses ignore dynamic pressure effect and do not use the Reynolds equation, and assuming that each oil recesses pressure is constant. Practical implications -The influences of the design parameters including the number of recesses, membrane restriction, membrane compliance, length-diameter ratio, half of con-angle, circumferential land width ratio, and axial land width ratio are discussed to the load capacity and static stiffness of conical bearing. Originality/value -Based on the characteristics of the conical bearing through analysis, this article suggests the front bearing with hard membrane restrictor (capillary) and the back bearing with soft membrane restrictor are the most appropriate for axial stiffness.

An improved lumped parameter method for calculating static characteristics of multi-recess hydrostatic journal bearings

“…Hsiao et al. 12 adopted the LPM to investigate the influences of design parameters on the static characteristics of hydrostatic conical journal bearings compensated by single-action membrane restrictors. Kang et al.…”

“…Bassani 11 presented a procedure of the LPM, incorporating turbulence and inertia edge effects, to forecast the static characteristics of hydrostatic journal bearings fed with cryogenic fluids. Hsiao et al 12 adopted the LPM to investigate the influences of design parameters on the static characteristics of hydrostatic conical journal bearings compensated by single-action membrane restrictors. Kang et al 13 investigated the static characteristics of a hydrostatic plain bearings compensated by constant compensations using the LPM.…”

Application of dynamic mesh technology in the oil film flow simulation for hydrostatic bearing

“…Li et al (2016) studied the lubrication performance of the large rectangular oil cushion by using the heavy CNC vertical lathe static thrust bearing as the object. Hsiao et al (2014) with one-way film throttling compensation oil cavity pressure method of hydraulic cone bearing static characteristics of the study.…”