The calculation of wear volume for the hydrodynamic journal bearings during starting and stopping based on abrasive wear model


As one kind of main shaft bearings, hydrodynamic journal bearings will have a long life under purely hydrodynamic lubrication regime. However, the bearings are easy to wear when they are in mixed lubrication regime during starting and stopping. In this paper, a new method is presented for calculating the wear volume of the hydrodynamic journal bearings, which is based on abrasive wear model. An equation is formulated for predicting the specific wear rate of the bearing material as a function of the wear depth. Finally, the wear volume of journal bearings for a stripped-down single cylinder engine during start-up and coast-down is calculated by the new method, and then it is compared with the results which are based on Model A.