Taking the valve train of a heavy-duty marine diesel engine as the research object

a lubrication simulation model of exhaust roller floating bearing under dynamic load and elastic deformation was established to explore the relationship of dynamic load

fluid kinematics and lubrication characteristics for floating bearing bushing

and further study the influence of key structural parameters such as floating bushings oil supply

clearance matching and wall thickness on the dynamic lubrication characteristics of roller floating bearing. Results show that the circumferential oil groove of floating bushing can increase oil supply flow

but it is unfavorable to the oil film thickness and transient peak oil film pressure of inner ring; The clearance matching of floating bushing has different effects on the oil film of inner and outer rings

but the optimized matching scheme can effectively improve the oil film lubrication characteristics such as oil film thickness

oil film pressure and average thermal load. Moreover

appropriately thinning the wall thickness of floating bushing is also beneficial to the lubrication characteristics.