Analysis of the Main Bearing Failure in a Diesel Engine
Based on the simulation of bearing contact pressure,oilfilm thickness,pin orbital path,and combining the firing order,crankshaft structure,it has been confirmed that the rotational inertia force of high speed is the root cause of the high and long duration force of the fourth main bearing for the failure of main bearing in a 12Ⅴ diesel engine.By increasing the balancing rate of crankshaft,the load and minimum oilfilm thickness of the fourth main bearing is improved,and reducing the risk of mixing friction and failure of bearing.The test proved that the improvement of balancing rate is effective.
diesel enginemain bearingbalancing rate of crankshaft
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