Abstract
The problem of shaft axial motion which significantly affects the lubrication performance has been a common phenomenon in journal bearing systems. The existing work involved in the solution of shaft axial motion is also very rare. In this study, we choose to examine the flow between sliding pair in which regard we present a unique heterogeneous surface consisting of a slip zone and a no-slip zone. The results reveal the following points: 1) By appropriately arranging the slip zone to change the angle between the borderline and the moving direction of the upper plate, it is possible to control the direction of the lateral traction in which the liquid film acts on the upper plate. 2) Exponent of the power function of the borderline and aspect ratio of the computational domain are large or small are not conducive to increasing the effect of lateral traction. For the object of this study, the final results of the optimization are shown that the lateral traction can account for 20% of the resistance.
Highlights
Journal bearings have been widely used in rotating machinery because of their simplicity, efficiency, and low cost
The results reveal the following points: 1) By appropriately arranging the slip zone to change the angle between the borderline and the moving direction of the upper plate, it is possible to control the direction of the lateral traction in which the liquid film acts on the upper plate
We choose to examine the flow between sliding pair in which regard we present a unique heterogeneous surface consisting of a slip zone and a no-slip zone, which produces the hydrodynamic pressure of the liquid film while providing a lateral traction perpendicular to the aCorresponding author: zlc78@hotmail.com 2158-3226/2017/7(11)/115208/14
Summary
Journal bearings have been widely used in rotating machinery because of their simplicity, efficiency, and low cost. Not many research works have been directed toward solving problems involving shaft axial motion. The axial movement of the shaft has been a common phenomenon in journal bearing systems. Can lead to a considerable shaft axial motion,[1,2,3] which significantly affects the lubrication performance of the journal bearings.[1,4] The use of solid-solid contact with the axial positioning of the way can’t alleviate the local high stress on the rotor, and bring considerable resistance to the shaft. Taking the aspect ratio of the calculated domain and the exponent of the power function that describes the shape of the borderline as the variable, the dimensionless parameter is optimized, making the lateral traction more significant
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