Restrictor-based studies of hybrid hole-entry conical journal bearings

Abstract

Purpose This paper aims to describe how successfully a particular restrictor delivers its best in increasing the conical journal bearing performance. The restrictors are used in the hole-entry conical journal bearing subjected to hybrid mode. Thus, the restrictors, like constant flow valve (CFV), orifice and capillary, are studied comparatively. Design/methodology/approach Numerical simulation for the bearing results with the three restrictors are obtained by using finite element method (FEM) under the well-known modified Reynolds equation. Findings When the hole-entry conical journal bearings, with the restrictor design parameter range C¯s2 = 0.03 – 0.09, are operated, the results obtained are quite distinctive and significant. It indicates that the CFV restrictor-based conical bearing gives enhanced performance in comparison to orifice and capillary restrictors. Moreover, it suggests the performance-wise sequence of the restrictors in hybrid bearings as CFV > Orifice > Capillary. Originality/value The outcome of the research paper will give insight to help the bearing designer to choose the particular restrictor in hybrid conical bearing depending on the industrial need.

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

“…In a study reported by Czaban, 9 the results were obtained at various bearing clearance and operating speed for hydrodynamic conical bearing. He concluded that accuracy of numerical simulation gets improved with inclusion of different effects but at the expense of computational cost Khakse et al 10 theoretically studied conical journal bearing with various flow control devices, like constant flow valve (CFV), orifice and capillary. They reported that the pressure in the circumferential direction is found to decrease for increased semi-cone angles, except for CFV hole-entry conical bearing.…”

“…Texturing on bearing surface slightly increases the value of p. The reason for such behavior is that, due to the use of a micro-texture, the convergent and divergent regions are formed, and because of this feature there occurs a pressure drop in the divergent region which Table 2. Geometrical and operational parameters of hybrid conical porous journal bearing (3,8,10,11,14,26,38,40,46,47,(58)(59)(60).…”

“…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.…”

Performance of conical hydrodynamic journal bearing under the worn-out condition

“…However, CHJBs are studied by very few researchers and hence scope for analysis and experimentation of it. Khakse et al (2016) and Khakse and Phalle (2021) used finite element analysis to compare the performance of orifice- and capillary-compensated non-recess hole-entry hybrid/hydrostatic conical bearing. The results showed that, non-recess orifice-compensated conical bearing gives better performance than the capillary-compensated restrictor.…”