近期，我院教师朱军超与海军研究院合作发表论文“A study on diesel engine crankshaft bearing failure analysis with consideration of bearing lubrication”
论文简介如下：
Purpose – The edge of diesel engine crankshaft main bearing is more likely to fail in its real working condition. This paper aims to study the bearingfailure mechanism by finding the relationship between bearing lubrication characteristics and its working condition.
Design/methodology/approach – This work builds the mixed lubrication model of crankshaft bearing to analyze the cause of bearing abnormal wear, and the finite difference method was used to solving the average Reynolds equation. During the analysis, journal misaligned angle, external load and roughness are considered.
Findings – The result shows that the wear of the diesel engine crankshaft bearing happens in engine startup phase and the bottom of the bearing are more prone to be excessively worn. Under the influence of journal misalignment, bearing asperity contact load and speed range of mixed
lubrication will increase markedly. The edge of the bearing will be excessively worn. The effect of misalignment on bearing lubrication performance varies under different shaft rotation speed.
Originality/value – The former research studies on crankshaft bearing either just focused on its lubrication characteristics or interested in its failure types (wear, adhere, cavitation). This paper studies the relationship between bearing failure mechanism and lubrication performance.
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