Research On The Multidisciplinary Optimization Design For Reducing Mass And Noise Of Two-stage Planetary Gear Reducer

Two-stage planetary gear reducer of the mine hoist has lots of transmission components, consisted of great massive and featured by complicated dynamic. In the process of using, reducer caused too much vibration and noises, which has greatly limited the development and application of mine hoist reducer. This thesis takes supported of the national science and technology support project "Research on key technology of lightweight and noise reduction of transmission of large mines, lifting "(project number: 2013BAF01B05), with two-stage planetary gear reducer of mine hoist as the research object. Through multidisciplinary optimizing for its weight and noises. In the end, the multidisciplinary optimization gained a reasonable result. The research content mainly includes the following several aspects:① Completed system decomposition of multidisciplinary optimizing system of two-stage planetary transmission, and completed process design of multidisciplinary optimizing system.② Built parametric model of planetary gears and computational model of impulse of meshing impact. Combining those models, acquired multidisciplinary optimizing system of two-stage planetary transmission. With adjusting the global variables, under the premise that ensure the gear reducer works reliably, using NSGA-II to calculate, acquired the result of multidisciplinary optimizing about weight and meshing impact of two-stage planetary transmission. The results show that, the optimized mass of two-stage planetary gear has reduced 6.48%, and impulse of meshing impact has decreased by 7.57% and 13.84% respectively.③ Completed static and dynamic simulation and analysis of two-stage planetary gear reducer, and compared analysis results of gear reducer before and after multidisciplinary optimized. The results show that, optimized gear reducer satisfied the static strength requirement, and tooth surface contact stress, dynamic meshing force, surface acceleration of gearbox, structural noise of gearbox all showed a declining tendency.