Research on the impact loading distribution in contact region of gears under acceleration condition

Vehicles need to accelerate frequently when dealing with road conditions during driving. The meshing impact load generated during acceleration is likely to cause surface and plastic deformation of gear teeth, which affects the balance of transmission power. Therefore, it is very important to clarify the impact of dynamic impact on gears during rapid start-stop driving to improve transmission balance. Based on this, this article establish a multi-field coupling gear acceleration meshing contact model by using ANSYS , and analyzed the value and distribution of the contact stress and shear stress in the gear meshing area under the impact of the acceleration phase, and to analyze the impact of the gear due to internal excitation. Clarify the law of contact stress and shear stress in the meshing zone under impact. On this basis, the power flow open gear test bench is used to test the gear transmission. The results show that during gear acceleration, the number of shocks first increases and then decreases with the increase in speed; the contact stress and shear stress increase first and then decrease, with multiple peaks; the two stress distributions are based on the contact point. The center spreads to the inside of the gear teeth. The loss power measured by the experiment is in the same interval as the numerical simulation, which verifies the accuracy of the model.