Abstract:

In order to investigate the interface slip of nonmetal bushes for the sliding bearing of spiral oil wedge,a mathematical model considering both the circumferential and the axial slips of bush surface is established based on the ultimate shear stress model. Then,with the help of the finite differential method,the effects of interface slip on the circumferential pressure,slip velocity,carrying capacity,end leakage and friction of the sliding bearing of a 2D spiral oil wedge are analyzed. The results show that interface slip may result in the increases of end leakage and the decrease of circumferential pressure,carrying capacity as well as friction,and that the threshold of the initial ultimate shear stress increases with the eccentricity,which prevents the interface slip from appearing on the bush surface. Moreover,it is found that the spiral angle has no obvious effect on the threshold of the initial ultimate shear
stress and that the interface slip occurs first in the envelop zone.

Key words: spiral oil wedge, sliding bearing, interface slip, ultimate shear stress