EXPERIMENTAL STUDY ON LOBE BEARING

Mechanical engineering

Analysis of multi-lobe journal bearing is very difficult, particularly when thermal and elastic effects are considered. Most of the earlier work was based on the assumption of rigid bearings and isoviscous lubricant in which the elastic deformations and the effect of temperature on viscosity is neglected. Also the realistic conditions like cavitation as well as modification of the lubricant flow due to bearing shell deformation were neglected. As in multi-lobe bearings, each lobe has different film shape and generates different amount of heat, the problem becomes complex and iterative. Such a heat generation also affects the bearing performance parameters like load carrying capacity. Hence, for accurate prediction of performance of hydrodynamic journal bearings, one must consider thermal as well as elastic effects in hydrodynamic solution.

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