In order to study the influence of different helix angle on the vibration characteristics of gear pair, keeping other parameters unchanged, the helix angle of 0 °、 ten ° And 25 ° The excitation and vibration response of the gear pair are analyzed. The meshing stiffness of gear pair under different helix angles is shown in Fig. 1-3.

It can be seen that under the same helix angle, with the increase of tooth thickness deviation, the single tooth meshing stiffness of gear pair decreases, which is consistent with the previous conclusion; Under the same tooth thickness deviation, the meshing stiffness of single tooth decreases with the decrease of helix angle. This is because the decrease of helix angle leads to the decrease of the coincidence degree of gear pair and the decrease of the number of teeth involved in meshing.

The transmission errors of gear pair under different helix angles are shown in Fig. 4-6.

It can be seen that under the same helix angle, with the increase of tooth thickness deviation, the transmission error of gear pair increases, which is consistent with the previous conclusion; Under the same tooth thickness deviation, with the decrease of helix angle, the fluctuation of transmission error excitation increases obviously.

The dynamic meshing forces of gear pairs with different helix angles are shown in Fig. 7-10.

It can be seen that under the same helix angle, with the increase of tooth thickness deviation, the fluctuation of dynamic meshing force increases, and the vibration of gear pair increases, which is consistent with the previous conclusion; Under the same tooth thickness deviation, with the decrease of helix angle, the fluctuation of dynamic meshing force increases obviously, and the vibration of gear pair increases. At the same time, it can be seen that with the decrease of helix angle, the vibration characteristics of gear pair are more sensitive to tooth thickness deviation ° The tooth thickness deviation is the same as that of the gear Δ The gear pair corresponding to Es5 is out of engagement and cannot mesh normally.