The maximum dynamic meshing force and the dynamic load coefficient of the loaded gear are analyzed respectively. They can provide the boundary conditions for the strength check of the gear teeth based on the finite element method or the empirical method. Under gear 1-8, the maximum dynamic meshing force of each loaded gear pair is as shown in the figure.
In the figure, abscissa 1-4 represents the external meshing pair of the loaded planetary row, 5-8 represents the internal meshing pair of the loaded planetary row, and 9-10 represents the meshing pair of the loaded fixed shaft gear. It can be seen from the figure that the maximum dynamic meshing force of each loaded gear pair of planetary drive is obviously smaller than the maximum dynamic meshing force of the fixed shaft gear pair due to the characteristics of power split of planetary drive, that is, the power is shared and transmitted by several planetary gears. And with the increase of gear position, the maximum dynamic meshing force of the loaded gear decreases as a whole. Among them, the maximum dynamic meshing force occurs between the first gear pair of G01 and G02, and the maximum value is 215kn.
Under gear 1-4, the dynamic load coefficient of each loaded gear pair is shown in Figure a. It can be seen that, although the maximum dynamic meshing force of planetary gear transmission is small, the dynamic load coefficient of planetary gear transmission in gear 1-4 is generally higher than that of fixed shaft gear transmission. And in the first gear, the maximum dynamic load coefficient of each loaded gear pair is more than 2. From the change trend, with the increase of gear, the dynamic load coefficient between the planetary gear transmission and the fixed shaft gears G01 and G02 decreases gradually. For the shift gears, the dynamic load coefficient of 2-4 gears increases gradually. Further analyze the dynamic load coefficient of the loaded fixed shaft gear under the 1-8 gear, as shown in Figure B.
In gear 5-8, although the maximum dynamic meshing force of the fixed shaft gear pair is smaller than that of gear 1-4, the dynamic load coefficient is larger than that of gear 1-4, which indicates that the dynamic load fluctuation of the gear transmission system in high gear is relatively large, the vibration is more obvious, and the dynamic load coefficient of the gear pair under load exceeds 2. Among them, the dynamic load coefficient of G01 and G02 gear pairs reaches the maximum value of 3.54 at gear 5.