TY - NEWS
TI - Document details - A numerical model for the analysis of the bearings of a diesel engine subjected to conditions of wear and misalignment
AU - Pardo García, Carlos Eduardo
AU - Rojas Suárez, Jhan Piero
AU - Orjuela Abril, Martha Sofia 
AB - In the present work, a numerical model is developed to investigate the influence of wear
and misalignment on the bearings of a stationary diesel engine. The model implemented considers
the effects of surface wear on the bearing, cavitation effects, and surface roughness. For the numerical
analysis, changes in the surface roughness of σ = 0.75 µm, σ = 1 µm, and σ = 1.25 µm are defined,
and changes in the bearing load of 50%, 75%, and 100%. The results demonstrated that increasing
the surface roughness intensifies the bearing wear, which represents 18% and 140% of the bearing
clearance for the roughness of σ = 1 µm and σ = 1.25 µm, respectively. Additionally, the surface
roughness causes a considerable increase in the bearing wear rate. The results described a maximum
wear rate of 20 µm/s. In general, increasing the bearing load by 25% doubles the hydrodynamic
pressure conditions increases friction force by 33%, and reduces lubrication film thickness by 12%. The
analysis of the angle of deflection, φx and φy, shows that the moment and the degree of misalignment
tend to increase significantly with the increase in the magnitude of the angle φy. Negative angles of
deflection, φx, produce a greater increase in the degree of misalignment and the moment. This implies
a greater chance of contact with the bearing surface. In conclusion, the proposed methodology serves
as a reliable tool to simultaneously evaluate key parameters on the tribological behavior of bearings
that further extend their endurance and minimize wear damage.
DA - 2021-04-09
KW - engine bearings
KW - deflection angle
KW - misalignment
KW - surface roughness
PB - Lubricants
UR - https://repositorio.ufps.edu.co/handle/ufps/6622
ER -