The main journal bearing lubrication characteristics performance of the Ricardo Single Cylinder Hydra Research Engine was investigated under three different engine speeds (1500, 3000 and 4500 rev/min). In this study Ricardo Suite Software was used. It was investigated the maximum oil film pressure, the minimum oil film thickness, maximum eccentricity ratio, hydrodynamic power loss, friction torque and oil flow rate on the dynamically loaded connecting rod bearing vary as the speed increases. Variations of the parameters affecting journal bearing lubrication characteristics performance with respect to the increase in engine speed are shown table form and graphically. The friction torque of the main bearing at 1500 rev/min is 0,270 Nm and the hydrodynamic power loss of the main bearing at 1,4 W. The friction torque of the main bearing at 3000 rev/min is 0,532 Nm and the hydrodynamic power loss of the main bearing at 5,86 W. The friction torque of the main bearing at 4500 rev/min is 0,843 Nm and the hydrodynamic power loss of the main bearing at 19,31 W. It was observed that the friction torque and the hydrodynamic power loss increased with the increase in engine speeds. In this study, it has been observed that the friction moment and the hydrodynamic power loss in the bearing increases as the oil film thickness in the main bearing decreases with the increase in the engine speed.
Anahtar Kelimeler: Main Bearing, Hydra Research Engine, Bearing Lubrication Characteristics
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