Large Vertical Transmission Planetary Gear Reducer Design Optimization

Planetary gear reducer drive system is the core of large vertical components, its performance has a direct impact on the operation of the whole system, the design process should not only ensure the security of its transmission, but also decrease its volume as much as possible. For this problem the traditional spreadsheet method has been replaced by the modern machinery optimization design because of the long design cycle and the cost of a large human and material.But the optimal design of the traditional transmission system, one part it doesn't consider the variables and the boundary conditions comprehensive, the other part it treats the will stress and strength as an fixed value, it ignores more influence factors of transmission, so it won't get the optimal solution on both economy and applicability. Given all these problems, this paper has restructured the optimum target function, design variables and constraints with reliability factors, then it has used three software and two methods to solute the program, finaly the results has compared of the static characteristics to find the best solvtion.In order to make sure of the system dynamic performance, this paper has used pro/e combining with adams to establish the actual gear meshing model for observing the transmission gear meshing, then it has compared the dynamics characteristics of the original and the optimized transmission system. It has confirmed that the resonance won't occur in the system through the natural frequency.Considering that the particularity of planetary gear planetary drive needs planets frame structure to support, so it needs statics analysis to guarantee planet shelf stability after the optimization. While obtained structure of the stress and displacement field, this paper has used Ansys to implement parametric finite element modeling for the planet shelf components, and then it has optimized on the model, the optimization must make sure that the new components can be gear transmission with and satisfy the strength requirement of itself.Finaly it has reduced the effect of the transmission system cost through the gear parameters and planet shelf the optimization design.