عنوان مقاله [English]
Thrust bearings are a type of bearings used to prevent axial movement of the shafts. For internal combustion engines, it is necessary to use crankshaft thrust bearings to balance the forces in the direction of the crankshaft axis, to prevent its axial movement. For diesel engines, plain bearing type (like ring) is generally used as thrust bearing which sits on the engine block bearing housings. In this paper, modelling of the thrust bearing of a 12-cyl engine crankshaft was performed using Excite software. The elasto-hydrodynamic lubrication analysis of the oil film in the crankshaft thrust bearing was performed and the results were investigated. first, the analysis of the thrust bearing, under the axial force due to the slope of the engine, was accomplished. Then, the analysis of the thrust bearing under the axial alternating force due to the slope of the engine was done and finally the analysis of the bearing under the axial forces in an engine operating cycle was performed. The results of this analysis including oil film pressure distribution, minimum oil film thickness and etc. can greatly help the bearing designer to make design modification or selection. The results of this analysis including the oil film pressure distribution and the minimum oil film thickness can give the designer insight about the possible failures of bearing whether oil film thinning and contacting roughness peaks and subsequent abrasion can occur or not.