| Compressor is a kind of machinery that improving gas pressure or conveying gas.The compressed air is the second-largest power and energy after electricity power, it is used widely in the life and all aspects of production Crankshaft is one of most important part of compressor, It’s damage may lead to the damage of other parts, causing compressor is not working properly. Its design and performance will affect the compressor reliability and lifetime. Therefore, it is very important that carried out an accurate analysis of the dynamic characteristics, strength check and evaluate the fatigue life of the crankshaft.In this paper,6M25-180/314compressor crankshaft for the study, according to the working principle of the compressor, applied Pro/E software to establish a three-dimensional model of crankshaft system, carried out the analysis of crank linkage multi-body dynamics by ADAMS. Then established finite element model of the crankshaft by ANSYS, to generate modal neutral file of crankshaft system for flexible multi-body dynamics analysis, to replace the rigid crankshaft of multi-body dynamics model, establishment of a flexible multi-body dynamics crankshaft system model, and carried out a flexible multi-body dynamics analysis, obtained the dynamic characteristics and load spectrum. According to finite element static analysis, load spectrum and material parameters, the establishment of a fatigue analysis model of the crankshaft, using ANSYS nCode DesignLife software to assess the fatigue life of the crankshaft, got it’s fatigue life and fatigue failure danger point of the crankshaft, crankshaft and compressor reliability analysis provides the basis. Finally, the crankshaft is optimized by ANSYS, got the optimized solution and optimization validated.The results show that Combine the finite element method with multi-body dynamics technique can accurately analyze the dynamic characteristics and the load spectrum of the crankshaft, and thus carried out fatigue analysis of the crankshaft, and the results have important implications for the Optimized design and improving the performance of the compressor crankshaft. |
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