Particulates Distribution in the Dynamic Pressure Sliding Bearing under the Oil Lubrication Condition

Abstract

In the dynamic pressure sliding bearing under the oil lubrication condition, the lubrication oil between the journal and the bearing bush maintains the normal operation of the bearing, which is affected by the complete oil film, the boundary lubrication and the mixed film. With the increase of oil input and journal speed, it is not uniform towards the dynamic pressure distribution inside the sliding bearing. At the same time, cavitation is occurring, causing that particulates fall off the bearing surface, as well as the increase of the improper noises, which reduce the service life of the sliding bearing. The experimental result shows that the wear particles in the oil film are affected by the rotation speed of the shaft journal, the external load of the bearing and the size of the wear particles, so the wear particles in the bearing oil film are concentrated at the working face of the bearing bush and the minimum thickness of the oil film by centrifugal motion. Therefore, the study of the physical and chemical characteristics, which are talked on wear particles in the lubricating oil film of dynamic pressure sliding bearings, will play an important role in the fault diagnosis and condition monitoring of sliding bearings in the mechanical field.