Gear drive technology is widely applied in the automotive

construction machinery and aviation industry.However

during the transmission of the gear in meshing

a lot of heat will be generated due to the relative sliding friction between two tooth surfaces

which will not only reduce the transmission efficiency

but also can cause local thermal deformation and thermal stress due to local high temperature

and then causes the scuffing and pitting of gear.Combining the present progresses of gear thermal analysis

the theoretical calculations

numerical analysis and test of thermal analysis are summarized

and the emphasis of gear thermal analysis is points out.