Research on the Influence of Impurity Particle on Lubrication Characteristics of Needle Roller Bearings
In order to investigate the influence of impurity particles mixed in oil on the lubrication performance of needle roller bearings,a line contact lubrication model considering individual impurity particles was established based on the lu-brication model of line contact needle roller bearings.The multi grid method was used to calculate the oil film pressure,the multi grid integration method was used to calculate the elastic deformation of the oil film,and the column by column scan-ning method was used to calculate the oil film temperature.The oil film pressure,film thickness,flow velocity,and tempera-ture changes of particles flowing in the contact area under different entrainment speeds,loads,and particle sizes were ob-tained.The results indicate that the presence of solid particles can cause an increase in oil film pressure and temperature near this location,a decrease in film thickness,and fluctuations in fluid flow rate.A decrease in the suction speed,an in-crease in load,and an increase in the size of impurity particles will significantly increase the pressure and temperature at the location of the particles in the contact area,leading to adverse working conditions and causing adhesion or pitting be-tween the roller needle and the raceway at that location.
line contactneedle bearingsolid particlesparticle flowmultigrid method
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