Abstract: According to the theory of swing movable teeth meshing

this paper analyzed a calculation method of heat flow that swing movable teeth transmission produced during the drive process and established the finite element calculation model of the central internal gear’s body temperature by using the theory of Tribology and Blok. Through the example cases

the steady temperature field distribution of central internal gear and the sensitivity of body temperature on speed

load and lubricating-oil temperature were analyzed. The results indicated that the maximum body temperature was near the inflection point of internal gear profile curve. In addition

the body temperature rose as the rotational speed

load and oil temperature increase

but the distribution of the temperature field remained the same. This research provided a theoretical basis for the calculation of the thermal deformation and the profile modification of the internal gear

and it had significant guidance to improve the transmission performance of swing movable teeth transmission.