Abstract
The multi-power coupling transmission system (MPCTS) is an electromechanical coupling system, which typically use two or more induction motors to provide its driving torque. It is used in various industrial applications, such as cutter header driving systems of tunnel boring machinery, and yaw systems of wind turbines. In practical engineering applications, the loads borne by the MPCTS are very complex, including both torque loads and non-torque loads. Its dynamic characteristics are affected by both the gear transmission system and the drive motors. For this study, an electromechanical coupling dynamic model of the MPCTS, coupled with a gear transmission system, induction motor, and non-torque load, was constructed to analyze its dynamic characteristics under a non-torque load condition. The results showed increased offsets from the gear vibration equilibrium position, as well as deterioration in system load-sharing characteristics from increases in non-torque load and rotational speed. However, the influence of the non-torque load was significantly greater than that of the rotational speed.
Highlights
The multi-power coupling transmission system (MPCTS) is an electromechanical coupling system, which typically uses two or more induction motors to provide its driving torque
During MPCTS operation, the non-torque load can lead to unequal loading between gears, and an increase in the dynamic meshing force among gear pairs, which negatively affect the dynamic characteristics and load-sharing properties of the system
This indicates that non-torque load is a major contributing factor in the safety and reliability of MPCTS operation, because it contributes to premature gear transmission system failures, and internal permanent damage [3]
Summary
The multi-power coupling transmission system (MPCTS) is an electromechanical coupling system, which typically uses two or more induction motors to provide its driving torque. During MPCTS operation, the non-torque load can lead to unequal loading between gears, and an increase in the dynamic meshing force among gear pairs, which negatively affect the dynamic characteristics and load-sharing properties of the system. Those results indicate that non-torque loads can lead to unequal planet load sharing, which are commonly carried by carrier 1 bearings [5]. Park et al built a 3D analysis model of a three-point suspension gearbox for a 2-MW class wind turbine, to study the effects of axial force, radial force, and bending moment, on the load sharing of planet gears. In this study, an electromechanical coupling dynamic model of MPCTS with a gear transmission and induction motor, was used to analyze dynamic characteristic under non-torque loads.
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