LAUSR

The thermal elastohydrodynamic lubrication characteristics of a modified gear system under a dynamic load were investigated, including the influence of the modification coefficient and vibrations. Based on the dynamic theory of gear systems, a six-degree-of-freedom tribo-dynamics model was established. Thermal elastohydrodynamic lubrication characteristics of a modified gear system under vibrations and a static load were analyzed. The results showed that the positive transmission gear system exhibited the better lubrication effect compared with other transmission types. A thick lubricating oil film could be formed, and the friction coefficient between the teeth and the oil film flash temperature was the smallest. As the modification coefficient increased, the lubrication condition was continuously improved, and the scuffing load capacity was enhanced. The increment of the modification coefficient increased the meshing stiffness of the gear system but reduced the stiffness of the oil film.