On the Laminar Flow Characteristics of Conical Bearings. Part I—Analytical Approach

Abstract

An analysis has been made of the characteristics of externally pressurized central recess conical bearings with nonconstant film thickness under the assumption of isothermal laminar flow of a viscous incompressible fluid. The flow in the narrow gaps that may be convergent, constant, or divergent has been approximately determined on the basis of the lubrication theory with convective inertia neglected except for that part which is due to rotation. The pressure distribution along the gap, the load capacity, and the torque of the bearings, were theoretically predicted. It was found that, while the gap is very narrow, both the load capacity and the torque for the convergent case decrease moderately, and for the divergent case increase significantly with respect to the constant gap bearing, provided with flow rate, rotational velocity and the film thickness at the outlet of the gap are the same.

Effect of possible rotor deformation on the probability of face contact for a liquid film bearing

“…Centrifugal inertia effects are also taken into account which are not included in the classical lubrication theory, but can be important for high rotational operational speeds. In the case of a steady state condition analytical solutions of the problem are reported in [7] and [8], which are consistent with the classical no-slip solution of Kalita et al [9], when the slip condition is not considered (see [10] for the corresponding experimental verification). Even in this simple flow configuration, the bearing behaviour is defined by the complex interaction between the different parameters defining the problem; bearing geometry, rotor inclination angle, fluid pressurisation, slip condition and effects of inertia.…”

Experimental Investigation Regarding the Effects of Grooves on Conical Bearing Performance

“…It h:tr h r r n * h c~~r n hv l i~l i t :~ et al (12) that for externallv p r~~v~r i w < l cc,nir:~l hr:lring. ;, w i~h o t~t groovrs, the theoretic;tl 1wrs11rr rlislril,t!li~,n ;,long t h r sl;tnt height, fkr various gap :tn<l llo\r rate c t l t~r s , ni;ty h r pl-rsrnrrd in a dimensionless f<,rn, :Is :I i.tmilv c,fF(Y, 10 rcltnsrs.…”

Influence of Percolation effect of additives on the Performance of Conical Textured Porous Hybrid Journal Bearing

“…In recent times very few researchers [2][3][4][5][6][7][8][9][10][11] focused their studies in the area of conical bearings. Rodkiewicz et al 2,3 proposed a numerical and experimental model to examine the behaviour of conical hydrostatic bearing with varying film thickness assuming isothermal laminar and viscous incompressible fluid. This study was not a comprehensive one as the presented results were limited to only dimensionless fluid film pressure, load carrying capacity and torque.…”

“…Further, Rowe 1 highlighted the advantages of the conical journal bearing system. In recent times very few researchers 2–11 focused their studies in the area of conical bearings. Rodkiewicz et al 2,3 proposed a numerical and experimental model to examine the behaviour of conical hydrostatic bearing with varying film thickness assuming isothermal laminar and viscous incompressible fluid.…”