The friction coefficient has an important influence on the dynamic response characteristics of helical gear. Based on the coupled dynamic model, the dynamic response of helical gear after modification is simulated and analyzed when the friction coefficient is 0.1, 0.075 and 0.05. The vibration displacement and vibration velocity of the driving wheel in X, y and Z directions are shown in Fig. 1, Fig. 2 and Fig. 3 respectively. The vibration displacement and vibration velocity of the driven wheel in X, y and Z directions are shown in Fig. 4, FIG. 4 and Fig. 6 respectively. Figure 1 ~ 6 shows that with the increase of friction coefficient, the vibration displacement and vibration velocity amplitude of driving wheel and driven wheel in X, y and Z directions gradually increase.
Figure 5 shows the dynamic meshing force and friction force when the friction coefficient of helical gear system is 0.1, 0.2 and 0.3. Fig. 5 (a) shows that with the increase of friction coefficient, the fluctuation range of dynamic meshing force gradually increases. Fig. 5 (b) shows that with the increase of friction coefficient, the friction amplitude increases, and the friction coefficient increases, and the fluctuation amplitude increases when the friction maintains a constant value.
Figure 6 shows the dynamic transmission error curve when the friction coefficient of helical gear system is 0.1, 0.2 and 0.3. Figure 6 (a) shows that with the increase of friction coefficient, the amplitude of dynamic transmission error increases, and the oscillation amplitude also increases with the increase of friction coefficient. Figure 6 (b) shows that the amplitude of dynamic transmission error in the first, third and fifth meshing orders increases with the increase of friction coefficient.
