Analysis and design of dynamic characteristics of planetary gear transmission
Taking into account the phenomenon that there were differences in the meshing characteristics of gears under speed-up and speed-down transmissions,a series of design methods that simultaneously satisfy the needs of speed-up and speed-down loads and different tooth side clearances were established.Focusing on the common NGW planetary gear train,a combined approach of concentrated parameters and finite element analysis was employed to compute root stress under different torques and tooth clearances.Bending stress in each gear was comparatively analyzed for acceleration and deceleration drives.Findings revealed a positive correlation between stress variations in solar and planetary wheels and applied load,while tooth rings correlated negatively with stress variations in the two wheels.During speed increase design,the planetary gear train's tooth ring experienced maximal impact and deformation at startup.As torque increased,the rising trend of impact force diminished.Tooth-side clearance significantly influenced system meshing,and appropriately chosen clearance enhanced the stability of planetary wheel load distribution.It provides a data reference for the design of planetary gears with reference backlash at increasing and decreasing speeds,helping to optimize the design.
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