Influence of meshing characteristics of star-gear reducer by deformation of the hub

XIA Jian-fang1, LIU Dong-yang1, HE Qi-cheng1, GAO Fang-jun2
(1.School of Mechanical and Electrical Engineering, Central South University, Changsha, 410012, China; 2.Hunan Academy of Mechanical Science Co., Ltd., Changsha, 410007, China)

Abstract: Aiming at the problem of bilateral contact between the teeth of the star reducer caused by the deformation of the hub, the effect of the size of the hole on the hub of the planet gear of the stargear reducer on the meshing characteristics was studied. The finite element simulation method of the star gear reducer under the condition of complicated assembly relationship and high nonlinearity was studied. The model was simplified under the premise of meeting the engineering accuracy, and the finite element model of the stargear reducer was established by the software Abaqus. Under the premise of not changing the diameter of the shaft and the hole distribution on the wheel hub, the diameters of the bearing holes of the transmission crankshaft and the holes of the direct-connecting shaft on the hub of the planetary gear were reduced by 10% respectively, and the contact situations of the gear tooth were analyzed. The results indicate that reducing the diameter of the hole in the hub can improve the rigidity of the hub and improve the phenomenon of bilateral contact between the teeth. Reducing the size of the hole of the direct-connecting shaft has a better effect on improving the bilateral contact of the gear teeth. Reducing both holes by 10% can completely eliminate the bilateral contact of gear teeth.
Key words: star-gear reducer; deformation of hub; finite element simulation; meshing characteristics