Jixie chuandong (Aug 2023)
Study on Meshing Stiffness and Dynamic Characteristics of Fine High Tooth Gears
Abstract
In order to study the vibration characteristics of fine high tooth gears, a pair of standard gears and fine high gears are taken as comparative experimental objects, and the translation torsion dynamic model of a spur gear transmission system is established. The finite element method is used to solve the time-varying meshing stiffness of fine high tooth gears, and the influence of load on the stiffness is analyzed. The vibration response of gears is calculated by Newmark-β time integration method. The dynamic loads of bearings and gear meshing excitation of standard gears and fine high gear transmission systems are compared, and the dynamic loads of input and output bearings of two pairs of gear systems at different speeds are solved. The results show that the meshing of fine high gears is two-tooth three-tooth alternating contact, and the change of stiffness is weakened. The dynamic load fluctuation amplitude of the bearing is significantly lower than that of the standard tooth, the meshing frequency and its frequency doubling amplitude are significantly reduced, and the meshing force between the teeth is reduced.
