TRIBOLOGICAL STUDY OF HYDRODYNAMIC JOURNAL BEARING AND ITS ANALYSIS

Abstract

Journal bearing friction pair system is one of the most general and essential parts used in various mechanical devices. The friction and wear behavior of journal bearing material has been investigated using pin and disc. The friction and wear behavior of the journal bearing material has changed according to the sliding conditions and lubricating oils. The behavior of journal bearing must be analyzed to increase its life and performance and to reduce its wear under hydrodynamic lubrication at different conditions. The objectives of this research are to provide an analysis of the pressure distribution in the lubricant with different speeds of the journal and at different loads for a journal bearing experimentally as well as computationally. A computational model has been developed and graphical solutions were obtained for the pressure distribution over the bearing surface. The pressure distribution for lubrication film is obtained using MATLAB software graphically. The pressure distribution along with torque and temperature at the outlet of the journal bearing has been obtained experimentally and it was then compared with the theoretical solutions. Two process parameters, namely radial load & journal speed are considered as the factors influencing the pressure curve of the journal bearing. Experimentation was carried out on the journal bearing rig TR-660 to measure pressure at a different angular position on the bottom half of journal bearing.