Abstract
In hydrodynamic lubrication, at very high rotational speed, the phenomenon of axial fluid leakage is often present. This can involve an increase of shear stress in the contact and consequently a considerable increase of the temperature. For that and in order to solve this problem, we took interest in the herringbone grooved journal bearings. The researches made before on these types of groove bearing have shown that they present a good dynamical behavior with a low eccentricity and a low axial flow. In this paper, a numerical study of a herringbone journal bearing operating behavior, under laminar and isothermal regime, is presented. The theoretical model, based on the classical Reynolds equation, is used. In order to include the film rupture and reformation, the Reynolds equation is modified using a mass conservative algorithm. To understand the behavior of these herringbone grooved journal bearings well, numerical modeling, using finite element method, has been developed. Various geometrical shapes of the herringbone grooved journal bearings have been analyzed, allowing us to limit the fluid leakage problem, by working particularly on the contact form.
Highlights
Herringbone grooved journal bearing is one of the best alternatives used in business machines and other applications, due to their improved stability characteristics and their implication to reduce the fluid leakage effect
To minimize the problem of fluid leakage into systems and from models developed and validated with theoretical and experimental results on the viscoseals [11, 14], in this paper our study will be extended to different herringbone grooved journal bearing geometries, for an incompressible lubricant. e Reynolds equation will be solved by the finite element method (FEM). e pressure distribution and the fluid flow will be calculated and analyzed
In the case of a laminar regime, the results on the optimal geometry [11] were compared with those of Boon and Tall [13]. e study in the case of a herringbone grooved journal bearing does not change in any way, in the mathematical and numerical modeling. e main difference is only that we have to manage both edges of the landing but the principle stays the same
Summary
Herringbone grooved journal bearing is one of the best alternatives used in business machines and other applications, due to their improved stability characteristics and their implication to reduce the fluid leakage effect. In 2007 and in the same way, Wang [7] has investigated the bifurcation and nonlinear behavior of an aerodynamic journal bearing system taking into account the effect of stationary herringbone groove applying the finite difference method. To minimize the problem of fluid leakage into systems and from models developed and validated with theoretical and experimental results on the viscoseals [11, 14], in this paper our study will be extended to different herringbone grooved journal bearing geometries, for an incompressible lubricant. To minimize the problem of fluid leakage into systems and from models developed and validated with theoretical and experimental results on the viscoseals [11, 14], in this paper our study will be extended to different herringbone grooved journal bearing geometries, for an incompressible lubricant. e Reynolds equation will be solved by the finite element method (FEM). e pressure distribution and the fluid flow will be calculated and analyzed
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