the influence of contact ratio on the loads of gear teeth
and the effects of variable curvature of tooth profile and sliding velocities
a group of equations of transient elasto hydrodynamic lubrication and a solution method are given in this paper.The pressure distribution and the form of oil film at the any point on the path of contact
and the variable curve of the thinnest oil film along the path of contact are also obtained by means of a full numerical solution based on the operating condition of the gear transmission.