Abstract:The effects of phosphate ester coupling agent modified liner on bonding properties and tribological properties of self-lubricating spherical plain bearings were explored by used of Instron5944 electronic universal testing machine and homemade spherical plain bearings friction and wear tester.The results show that the bonding properties of bearing liner are improved after modifying by phosphate ester coupling agent.There is a significant correlation between the friction and wear properties of self-lubricating spherical plain bearing and oscillating frequency,and with the increase of oscillation frequency,friction coefficient and wear loss are increased,while the friction temperature is raised.The friction coefficient,wear loss and friction temperature are obviously decreased for the bearings with phosphate ester coupling agent modified liner,indicating the phosphate ester coupling agent modified liner can improve the tribological properties of self-lubricating spherical plain bearings.