On the dynamic wear behavior of misaligned journal bearing with profile modification under mixed lubrication

Abstract

Abstract In this paper, we introduce a method of one-side profile modification for the misaligned journal bearing to reduce the edge wear caused by the journal defection under the external load. To predict the bearing wear behavior, a dynamic wear model considering mixed lubrication based on friction fatigue mechanism is applied. The positive role of the one-side profile modification in mitigating the negative effects caused by journal misalignment is confirmed by numerical calculations. The optimal modification parameter setting is determined with the calculation results, and the dependence of the optimal modification parameters on the different operating conditions, including external force and shaft length, are explored. The results indicate that the reasonable design of one-sided profile modification can effectively increase the minimum film thickness at the edge of the bearing and reduce the rough contact, thereby improve the anti-wear performance of the misaligned journal bearing under mixed lubrication. The present study could provide an engineering approach for the anti-wear optimal design in misaligned journal bearing applications.