Because the transmission and seal tester is connected by rigid coupling, the dynamic model of the system is shown in the figure. The planetary gear transmission system and the sealed rotor system are integrated by using the centralized parameter method.
1 – planetary gear (P); 2 – sun gear (s); 3 – planetary carrier (c); 4 – inner gear ring (R);
8 — bearing; 6 — rotating shaft; 7 — sealing plate
According to the separate analysis of planetary gear and rotor system, the dynamic equations of the two parts are sorted out. Since the equations of planetary gear and sealed rotor system are given, the dynamic equations of sealed rotor system considering gear meshing characteristics can be obtained by integrating the two parts, so it is not necessary to repeat them here. However, when integrating the equations, it is necessary to pay attention to the planetary gear transmission system as the power and motion input end of the sealed rotor system, and the corresponding data output from the planetary gear transmission system can be used as the input data of the sealed rotor system after being dimensionalized. Among them, the input torque (T) of the sealed rotor system is the output torque (tout) of the planetary gear transmission system; the radial force of the rotor (FX, FY) is the radial force of the output wheel (sun gear) in the planetary gear transmission system; and the rotor speed is the speed of the output wheel (sun gear) in the planetary gear transmission system.