The Computation And Optimization Of A Cooling Machine Frame Used In Power Rotor

Electric power, as an important component of modern industry energy system, plays an important role in the energy supply pattern. The growing demand for the electric power along with the economic development and the promoting electric power construction policy actively accelerate the progress of independent manufacture of powerful power generation equipment. Constrained by some key equipment, electric power rotors of high quality and high power are still dependent on import. Therefore, it is of great practical significance to develop such large scale machines.Little information about design research into the large scale heat treatment machines is available. However, the most essential part of the machine tool is machine frame, which belongs to steel structure. Designers could refer to the knowledge of steel structure. In view of safety, manufacturers often select too large factors of safety in the original structural design, which leads to enormous waste of steel. It is very necessary for the optimization of machine structure.According to the scheme of a large-scale vertical cooling machine frame used in the heat treatment process of power rotor, the finite element method is applied with the software ANSYS in this paper. A new configuration, the size of which is also optimized, has been suggested. The finite element analysis of the schemes, mainly including static analysis, modal analysis, seismic spectral analysis, has been carried out to check whether the intensity, the stiffness or the stability meets the requirements. First of all, we study the original scheme. Then, the second scheme has been brought up throug improvement base on the results of initial solution. At last we come up with a new scheme, to which static and dynamic analysis along with an on-scene static test is also done. The new scheme is subsequently optimized by two steps with the weight as objective variable, section dimension parameters of columns and beams as design variable, maximum displacement and maximum stress as state variable.The results reveal that the original scheme meets all the technical requirements, but it occupies too much level area and consumes much steel. The second one and the last new one are feasible. Compared with the original one, it occupies less level areas and consumes less material with lower production costs. So the new scheme is recommended and the on-scene test validates the accuracy of the finite element analysis, which is done to it. The subsequent optimization is done to save resources and reduce the costs further. It provides some reference value for the design of frame structure of the large-scale machine frame and the practical application.Referred to the achievements of the previous designers on steel structure, personal opinions on the following issues are obtained in the paper:(1) Systematically analyze the schemes of a large-scale vertical cooling machine frame used in the heat treatment process of power rotor;(2) The analysis process of every scheme is realized by APDL(ANSYS Parametric Design Language), which is more convenient and efficient.(3) Making use of the advanced structural analysis capabilities of ANSYS, the best cross-section parameters are obtained throug the optimization.