Study On Carrying Capacity Of Integral Planet Carrier Based On Finite Element Analysis

With the application of the heavy-duty and high-power mechanical transmission mechanism becoming more widely, the study on planetary gear mechanism is becoming increasingly important. As one of the most important parts of the planetary gear mechanism, the planet carrier carries the maximum torque, and affects the load distribution among the planet gears. Therefore, the accurate analysis of the planet carrier’s carrying capacity and structural for improving system reliability and life of the planetary gear mechanism has great significance.In this paper, the finite element equivalent model is established under the premise of the planet carrier and the planet shaft as the research object. Based on the finite element analysis, the stress of planet carrier is analyzed, and influence of interference on the planet carrier stress distribution is studied when the shaft and hole are the interference fit. On this basis, the impact of jugged on the planet carrier stress distribution is researched when the shaft and hole use combination fit of interference fit and serrated teeth meshing.Firstly, the contact model of the planet carrier and planet shaft is introduced simply. The force of the planet carrier suffered is analyzed and calculated according to the existing data on the planet reducer.Secondly, on the basis of the finite element theory, the analysis on the planet carrier and the impact of interference on the planet carrier are studied under the shaft and hole are interference fit. The results show that, the stress of planet carrier becomes larger when the interference increases.Finally, the influence of the serrated teeth on the planet carrier stress is analyzed, specific number of tooth, jagged teeth and tooth tip. The results show that, the stress of planet carrier becomes smaller, when the number of tooth, jagged teeth and tooth tip increase.