A Comparative Elastohydrostatic Analysis of CFV- and Capillary-Compensated Multirecess Hydrostatic/Hybrid Journal Bearing Operating with Micropolar Lubricant

Abstract

A comparative study on the performance characteristics of the flexible multirecess hydrostatic journal bearing system with constant flow valve and capillary restrictors has been presented considering the effect of micropolar parameters. The modified Reynolds equation for the flow of micropolar lubricant through the bearing has been solved using finite element method, and the resulting elastic deformation in the bearing shell has been determined iteratively. The results indicate that the micropolar parameters of the lubricant affect the performance of the flexible multirecess hydrostatic journal bearing system quite significantly.

A Study on the Influence of Combined Elastic and Micropolar Effects on Hole-Entry Hybrid Journal Bearing

“…The bearing geometry and operating parameters of the said configuration are selected judiciously from the available literature [3,7,12,16,20,21] as given in Table 1. Various bearing shell materials along with Modulus of Elasticity, Coefficient of Deformation and Poisson's ratio are available in literature [2,3,12,20].…”

“…Analysis given in above sections has been used to predict the change in behavior of performance and stability parameters of the said configuration of journal bearing due to elastic and micropolar effects. To validate the model and computer program used in present work, the load carrying capacity is calculated corresponding to various values of eccentricity ratio for rigid hydrodynamic journal bearing with Newtonian and micropolar Table 1 Bearing operating and geometric parameters [3,7,12,16,20,21] lubricants. It is seen that the present result values are quite comparable to those obtained by Wang et al [26] as shown in Fig.…”

“…Investigation was also carried out to analyze the effect of static and dynamic deformations of bearing liner on the dynamic performance characteristics and stability of a water-lubricated and rubber-lined journal bearing by Lahmar et al [19]. For calculating the performance parameters of recessed hydrostatic journal bearing, Verma et al [20,21] modeled the bearing elasticity problem considering lubricant to be micropolar. Also, Bansal et al [22] highlighted elastic distortion effects on stability of micropolar lubricated hydrodynamic bearing and their results indicated that increase in flexibility causes decrease in stability.…”

A Comparative Linear and Nonlinear Stability Analysis of Hybrid Journal Bearing Operating with Micropolar Lubricant

“…where ' i ' represents the direction of force and , The fluid-film damping coefficients are given as [12]:…”

“…An analysis of orifice compensated non-recessed hole-entry hybrid journal bearing operating with micropolar lubricants was done by Ram et al [10] to obtain optimum values of fluid film stiffness coefficients. Verma et al [11,12] analyzed and compared performance characteristics of flexible multirecess capillary and CFV compensated hydrostatic journal bearing operating with micropolar lubricant and observed a significant influence of bearing shell flexibility and micropolar effect on bearing performance. Recent studies on journal bearings operating with micropolar lubricant by Ram et al [13] and Rana et al [14] demonstrated the influence of micropolar parameters on performance characteristics of journal bearings.…”