An Analysis of the Steady State and Dynamic Characteristics of a Spherical Hydrodynamic Journal Bearing

Abstract

With recent developments in N. C. manufacturing processes it is relatively straightforward to produce a journal bearing with spherical surfaces. Such a bearing offers two main advantages over a conventional bearing: it can tolerate much larger misalignment and it can resist axial forces. In this paper, the steady state performance of a spherical journal bearing is studied by using a finite bearing theory. The dynamic characteristics of the bearing are represented by eight displacement and velocity force coefficients and the boundary of bearing stability is determined. The effect of superlaminar flow upon the bearing performance is also studied, and typical bearing design charts are provided. In comparison, the behavior of the spherical journal bearing is found to be similar to that of an equivalent cylindrical bearing.

Effects of double parabolic profiles with groove textures on the hydrodynamic lubrication performance of journal bearing under steady operating conditions

“…Earlier studies [1][2][3][4][5] had shown that the properly selected bushing profiles can enhance the lubrication performance and reduce the asperity contact. Recently, Liu et al [6] investigated the effects of bushing profiles on the elastohydrodynamic lubrication performance of the journal bearing under steady operating conditions, which revealed that the double parabolic profiles can reduce the bushing edge wear effectively.…”

Effects of bushing profiles on the elastohydrodynamic lubrication performance of the journal bearing under steady operating conditions

“…Some of the works mentioned above have pointed out that the bushing profiles have great impacts on the lubrication performance of journal bearings; in fact, the performance can be enhanced effectively if the profile is properly selected. Leung et al [25] presented a steady and dynamic analysis for the spherical journal bearing. The results showed that increasing the length to diameter ratio can increase the load-carrying capacity but reduce the bearing stability.…”

Finite element analysis of multirecess hybrid spherical journal bearing system

“…Leung et al. 13 theoretically analyzed the performance parameters of hydrodynamic spherical journal bearing by using finite bearing theory. A recent study reported by Yacout et al.…”

“…Further, the majority of the available studies reported in the literature regarding the spherical journal bearings are limited to hydrodynamic bearings. 2,12,13 The reported theoretical study 8 concerning the hydrostatic spherical journal bearings mainly deals with an orifice compensation devices using CFD for the single value of span angle γ = 90°. The span angle (γ) of a spherical bearing greatly influences the lubricating performance of hybrid spherical journal bearing.…”

“…Gupta and Deheri 12 studied the hydrodynamic squeeze film along with considering the surface roughness effects in a spherical journal bearing and observed that surface roughness has an adverse influence on the bearing performance. Leung et al 13 theoretically analyzed the performance parameters of hydrodynamic spherical journal bearing by using finite bearing theory. A recent study reported by Yacout et al 14 studied the effect of surface roughness on performance parameters of hydrostatic spherical thrust bearing.…”