The data of the temperature field is got by means of analyzing the heat of the gears and bearings in the planetary reduction gear and the whole speed reduction gear-box.The relationship between the origin and the transmit of heating is analyzed

the highest temperature and its position are determined

the reasons of veneer of the gears and the rolling elements in gears are searched based on the temperature rising and thermal load getting together in practical work

the reasons of the heating

forecasts the critical features and the working ability are showed

reliable temperature field data for the components of the speed reduction gear-box is provided.