Influence of step load on tribological properties of self-lubricating radial spherical plain bearings with PTFE fabric liner

The tribological properties of self-lubricating radial spherical plain bearings with polytetrafluoroethylene/aramid fabric woven liners under step loads were experimentally investigated. Using scanning electron microscopy and energy-dispersiveX-ray spectroscopy, the wear mechanisms of the liners were analyzed. The results showed that the wear loss, frictional temperature rise, and film forming capability were affected by the load ratio, swivel frequency, and load cycle. During the operation of the bearings, adhesive wear and abrasive wear occurred in the frictional pairs. As the load ratio increased, the adhesive wear and abrasive wear were aggravated.