Theoretical and experimental research on the micro interface lubrication regime of water lubricated bearing

Theoretical and experimental investigation on the influences of misalignment on the lubrication performances and lubrication regimes transition of water lubricated bearing

Mixed-lubrication analysis of misaligned bearing considering turbulence

Mixed-lubrication analysis of thin polymer film overplayed metallic marine stern bearing considering wall slip and journal misalignment

A transient hydrodynamic lubrication comparative analysis for misaligned micro-grooved bearing considering axial reciprocating movement of shaft

Mixed-lubrication analysis of marine stern tube bearing considering bending deformation of stern shaft and cavitation

In this article, a mixed lubrication model considering the oil supply quantity and a friction model under dry running condition were developed, in which an elasto-plastic contact model was employed...

http://journals.sagepub.com/doi/pdf/10.1177/1468087414556134

Tribological effect of piston ring pack on the crankshaft torsional vibration of diesel engine

A newly designed marine diesel engine piston was modeled using a precise finite element analysis (FEA). The high cycle fatigue (HCF) safety factor prediction procedure designed in this study incorporated lubrication, thermal, and structure analysis. The piston ring dynamics calculation determined the predicted thickness of lubrication oil film. The film thickness influenced the calculated magnitude of the heat transfer coefficient (HTC) used in the thermal loads analysis. Moreover, the gas pressure of ring lands and ring grooves used in mechanical analysis is predicted based on the piston ring dynamics model.

/pdf/thermomechanical-fatigue-life-prediction-for-a-marine-diesel-3h4c7r5xka.pdf

Thermomechanical Fatigue Life Prediction for a Marine Diesel Engine Piston considering Ring Dynamics

A two-dimensional thermomechanical finite element model was developed to analyze the sliding process of a piston ring with coating sliding on cylinder liner under dry running condition. Thermal and mechanical effects were considered simultaneously in the model. The aim of the current work is to study the mechanisms of scuffing, failure, and seizure occurrence in a piston ring-liner system. It is shown that coating thickness plays an important role in the thermal and mechanical stress status at the contact area, coating bulk body, and interface of the coating and piston ring substrate. The coating thickness also exhibits a significant influence on the temperature rising at the contact area and interface of the ring coating and substrate, which could cause failure at the interface of the coating and substrate before it happens at the contact surface under some specific conditions. The results also show that thinner coating thickness in some specific range could have a higher possibility of cracking or failu...

Wanyou Li

Papers

Mixed-lubrication analysis of marine stern tube bearing considering bending deformation of stern shaft and cavitation

Tribological effect of piston ring pack on the crankshaft torsional vibration of diesel engine

Thermomechanical Fatigue Life Prediction for a Marine Diesel Engine Piston considering Ring Dynamics

Interfacial Stress and Failure Analysis for Piston Ring Coatings under Dry Running Condition