To investigate the influence of support stiffness on the meshing characteristics of helical gear pairs, two rigid flexible coupling models of helical gears with different support stiffness were established, as shown in the figure.
Select the type according to the experimental conditions, model and locate the rolling bearing, and complete the parametric modeling of the helical gear pair system. The base material of the helical gear is defined as 20MnCrS5 steel, and the heat treatment method is carburizing and quenching. The small gear is integrated with the input shaft, and the large gear is installed with the output shaft using a synchronizer. The distance between the bearings at both ends of the large support span active helical gear shaft is 185 mm, and the distance between the bearings at both ends of the small support span active helical gear shaft is 107 mm. The models of the gear shaft system with large and small support spans are shown in Figures (a) and (b), respectively.
Based on the three-dimensional assembly model of the helical gearbox, a finite element model of the gearbox is established and meshed. Then, finite element software is imported to match the gear shaft system model, and the bearing center point is connected to the nodes in the vicinity of the gearbox bearing hole. The simulation model is condensed and the stiffness matrix after compression is read in. After completion, the finite element models of the large and small support spans of the helical gearbox are shown in Figures (c) and (d), respectively.
After establishing the simulation model, analyze the impact of different support stiffness on the bias load of the helical gear under the same input torque, different input speeds, and the same input speed and different input torque conditions based on the working conditions of the helical gear.