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The shield machine is a mechanical, electrical, hydraulic and control in one, dedicated to the major excavation of underground tunnel engineering and technology-intensive engineering equipment. High-power planetary reducer as one of the key components of the shield machine, its performance directly affects the performance of the shield machine. Harsh the deceleration device working environment for shield machine to withstand heavy loads and high impact, and must have a high-power, high torque output. The design and manufacture of high processing requirements, and the world, only a few countries such as Japan, Germany, businesses can produce, and the cost is very high. Therefore, the study of the shield machine high-power gear transmission, is of great significance to improve the capability of independent innovation, our shield machine reducer and promote the process of urbanization. This paper describes the the shield machine works, analysis of the development and current status of the shield machine and its deceleration device at home and abroad. Height summed the shield machine transmission work requirements based on the design of a new type of shield machine dual-drive high-power planetary gear reducer. The reducer by a differential mechanism and a two closed institutions composite multi-stream transmission system, the transmission ratio, carrying capacity, and a reducer to replace the traditional system of multiple sets of transmission. The main contents are as follows: the determinant method based on the principle of mechanical principles and gear, to establish a system of contact Figure kinematic equations derived reducer; analysis of the transmission characteristics of the dual-drive reducer, the transmission ratio, the internal speed and internal relations and the variation of the torque. Application of power bond graph theory and mechanical system dynamics principle to establish a differential mechanism, closed institutions and the overall bond graph dynamics model, the derivation of the equation of state of the reducer, the simulation of the dynamic characteristics of the reducer. The analysis of the variation of each variable and its influencing factors within the system under different input conditions. According to the principle of gears, the method of application of 3-D design, the establishment of a three-dimensional solid model of the various parts of the shield machine dual drive planetary reducer, in accordance with the actual connection between the various components, and virtual assembly. Design virtual experiments, reducer run institutions, kinematic simulation, to verify the correctness of the transmission ratio, intuitive reflect the status of the various components of the movement; finite element analysis methods mechanics from structure static, nonlinear contact The three aspects and modal verify the the shield machine dual drive planetary reducer structure rationality, and laid the foundation for further research.
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