Study on vibration characteristics of scroll compressor based on finite element power flow method
For the problems of complex internal vibration transmission path of vortex compressors,and inability for the traditional transfer function methods to accurately describe the essential problems of vibration generation and transmission,the power flow finite element method was introduced to analyze the vibration transmission characteristics from the energy point of view,and the visualization research on the generation,transmission and spatial distribution of internal vibration of scroll compressor was carried out.Firstly,based on the analysis of the dynamic topological relationship of scroll compressor,the excitation source extraction and vibration response model were established and simulated.Secondly,the effectiveness of the model was analyzed by comparing the results of physical object experiment and response analysis.Finally,eight energy output surfaces were defined on the verified model,the vibration energy transfer characteristics of the upper support and the lower support under harmonic and excitation were analyzed,and the power flow vectors of nodes were calculated to determine the spatial distribution of vibration sources.The results show that when the crankshaft of the scroll compressor runs to 280°,the vibration energy transmission rate is high when the vibration frequency is 1 000 Hz and 1 890 Hz,and the energy distribution of the upper support is uniformly concentrated on itself,while the energy of the lower support is concentrated on the legs and transmitted to the outside.The research methods and results have certain reference significance for vibration distribution and transmission,vibration control and optimization design of scroll compressor.
scroll compressorfinite element power flow methodenergy transfer characteristicsharmonic responsevisualization
万方数据
维普
