Structural Design And Performance Analysis Of The Hybrid Power Coupling System

With the growth in the number of vehicles, global energy shortage and deterioration of the ecological environment have appeared. Energy-saving and environmental protection have gradually been paid attention to by many countries government in the world, and the new energy-saving technique is researched and developed. Hybrid electric technique has good energy-saving effect and is easy to implement. For hybrid electric technique, the design and analysis of the hybrid power coupling system is the most critical part.In this paper, the power coupling device of the existing experimental of hybrid power has many shortcomings. The new power coupling scheme of differential planetary gear train taken as a core component is presented in this paper. According to the coupling scheme proposed and specific dynamic performance parameters, the new power coupling device is designed and analyzed. Main work is as follows:First of all, the shortcomings of the original power coupling device fixed a hybrid bench are analyzed and the power coupling scheme of a 2K-H type differential planetary gear train taken as a core component is proposed. And the transmission theory has been analyzed from several aspects, including speed ratio, speed, torque, power and transmission efficiency. It provides a theoretical basis for the design of the power coupling device.Secondly, the transmission ratio and the structure of the power coupling device are designed based on the coupling scheme and the dynamic performance parameters. Depending on the designed part size, the three-dimensional model and the virtual assembly model are established in the three-dimensional modeling software. The model foundation for the later correlation analysis is established. In order to verify the rationality of the designed structure, the most complex parts(carrier) of the power coupling device is analyzed in the finite element analysis software, and the even loading technique in differential planetary gears is researched by finite element method. The result indicates that the designed structure is reasonable.Finally, the virtual prototype simulation model of the power coupling device is established and its kinematics and dynamics simulation are accomplished in the ADAMS. The simulation results show that the power coupling device can achieve not only the speed coupling, but also the torque coupling. And the power of different power sources can admix by the designed power coupling device.