Abstract:

The friction coefficients, wear depths and friction temperatures of four kinds of rod end spherical plain bearings with liners at different oscillating frequencies are investigated by using a high oscillating frequency and heavy load tribo-tester. With the help of scanning electron microscope(SEM), the differences of worn surfaces of the four rod end spherical bearings are compared and analyzed. The experimental results show that the tribological property of bearing with PTFE liner is the best in the four kinds of bearings, followed by the bearing with a nylon liner which its heat conductivity and heat stability are better than the others, and the tribological property of bearing with copper base powder metallurgy liner is worst. At 3 Hz and 16 MPa, the bearing with nylon liner is slightly worn, while the bearing with PTFE liner is slightly spalled and worn, the bearing with bronze liner shows serious abrasive wear and fatigue wear, and the bearing with copper base powder metallurgy liner has adhesive wear on it.

Key words: mechanics, rod end spherical plain bearing, friction, wear, liner