S115034 Friction of Journal Bearings Measured using Deceleration Method and Calculated from Hydrodynamic Lubrication

Abstract

The friction torque of the test journal bearings is calculated from the angular deceleration and the moment of inertia of the rotor. The friction of the bearings having different clearance shape and length is measured and the coefficients of friction are calculated. The measured results are compared with the calculation results using hydrodynamic lubrication models. The results suggest that the clearance shape is important on the friction of the journal bearings. The clearance shape of the bearing in a con-rod housing shows lower friction than that in an equipped housing.