Heat-Structural Coupling Stress And Deformation Analysis Of The Non-Uniform Orbiting Scroll Of The Scroll Compressor

Scroll compressor is a new energy-efficient compressors. People study it more deeply, and apply it more widely. However, due to the unique structure and working style of the scroll compressor, resulting in the accurate analysis of the internal characteristics of compressed working fluid and parts is very difficult in the working process of the scroll compressor. This is not conducive to the production and practical application of the scroll compressor.In view of this situation, the scroll profile of non-uniform orbit scroll and3-D model are designed with meshing theory and the normal-equidistant-curve method. Then A more detailed theoretical analysis is done for the working process of the non-uniform scroll compressor. Those include that the mathematical model of the work process is built, the calculation of the heat transferring is discussed, the variation of the volume of the crescent sealed cavity and the temperature and pressure of the compressed gas are calculated. The transient simulation of the scroll compressor is based on these theoretical models and geometric model, with the computational fluid dynamics (CFD) method and the FLUENT. The velocity field, pressure field and temperature field of the compressed gas are obtained in the working chamber. The results show that features of the compressed gas is in line with the theoretical calculated and the actual working conditions with this method.For the scroll, the actual working loaded conditions and simplify loaded conditions are considered. The thermal load conditions that is based on the flow field analysis is used to get the temperature distribution of the orbit scroll with the finite element analysis. The results show that the temperature distribution of the scroll is more in line with the actual situation with this method. In the coupled analysis, the maximum equivalent stress appears on the bearing bore root of the scroll, and on the root of the scroll head. The deformation of the whole top surface of the scroll wrap is smaller than only the temperature distribution load analysis, and more than just the gas power load analysis. Therefore, in the analysis of the scroll compressor operation, the influence the thermal load, and the interaction between the two loads cannot be ignored on the scroll.Finally, the results of static checking and deformation analysis show that this designed the non-uniform orbiting scroll is reliable during scroll compressor operation. The theory and methods can provide a new idea to design the scroll compressor which is more reasonable and efficient in this paper.