Host: The Japan Society of Mechanical Engineers
Name : Dynamics and Design Conference 2019
Date : August 27, 2019 - August 30, 2019
In recent year, the gear devices have been used in high speed rotation areas due to electrification of cars. It is assumed that the eigenvalues of the gear shafts affect the vibration of the gear system due to the high speed rotation of the gears. There have been many theoretical studies on the dynamic characteristics of gear pairs. However, there have been few research reports calculated bearing load fluctuation considering the shafts and bearings. Therefore, in this research, the vibration characteristics in the gear system including the shafts and bearings are clarified theoretically. The meshing of the gear pairs is expressed by a spring-mass system of a single degree of freedom system, tooth profile error, nonlinear tooth stiffness and tooth separation are taken into consideration. In addition, the gear shafts and bearings are modeled by an Euler-Bernoulli beam supported by the springs. First, the excitation force generated by the meshing of the gears is calculated. Next, the vibration of the gear shafts is calculated using the excitation force by obtained by meshing calculation of gear pair. Finally, the circumferential vibration of the gear pair, the dynamic deflection of the gear shaft, and the bearing load fluctuation are obtained.
