The bevel gear model is analyzed by finite element method. The grid size setting, physical parameters, boundary conditions and their application methods are consistent with the finite element analysis of the model in Chapter 3. The final finite element model is shown in Figure 1. After solving the finite element model, the force distribution of bevel gear, pinion and large gear in power transmission is obtained.
Figure 2 shows the bending and contact stress of bevel gear pinion when the contact point is located in the middle of the tooth surface. Here, it can be seen that due to the design of two-point contact, the contact area no longer presents an elliptical shape, but becomes a long strip shape. The long strip contact area is connected by two ellipses.
Fig. 3 shows the change of the maximum contact stress of a single tooth in a meshing cycle. It can be seen that the maximum contact stress is within 1300mpa, and the contact stress is reduced by at least 15% compared with single point contact. Since only a single tooth is loaded in the middle of the tooth surface, the time when the maximum contact stress appears on the tooth surface is in the middle of the tooth surface. On both sides along the tooth width direction, the contact stress is relatively reduced because two teeth share the load together. On the whole, because the two contact points share the load, the contact stress is still reduced when the size is reduced compared with the single point contact equiangular spiral bevel gear. Fig. 4 shows the change of the maximum bending stress of a single tooth in a meshing cycle. It can be seen that the maximum bending stress is within 280mpa.
