Abstract: In order to eliminate the meshing interference of the gear pair of the planetary reducer,the single-stage planetary gear in an involute planetary reducer was taken as the object,and the transmission error of the planetary gear level,the meshing contact performance of the s-p meshing pair and the contact stress of the gear pair were taken as the modification evaluation indexes. The influence of the tooth profile modification parameters of the sun gear and the planetary gear on the transmission performance of the gear was studied. Studies show that compared with the unmodified case,when the sun gear and the planetary gear were modified,the planetary gear level transmission error,the gear pair contact stress,the s-p meshing contact performance and the stability of the gear transmission were greatly improved. According to the comparative analysis of gear modification parameters,it is found that when the modification amount is (16 ± 4) μm (sun gear) and (11 ± 4) μm (planetary gear),all indexes reach the optimum,which has a certain reference significance for improving the transmission performance of planetary gear and the modification processing of planetary gear.

Key words: planetary reducer, meshing interference, tooth profile modification, modification amount, simulation analysis