The Ansys Of Torsional Vibration Of Balanced Crankshaft With High Speed And Optimization Design

The developing new technology of compressor manufacturing is gradually meeting the targets for low energy consumption,low emissions,and low noise.At the same time the structure reliability design and vibration control of the compressor are put forward higher request.Crankshaft is one of the core components of the reciprocating compressor,and it is the main driving mechanism of the compressor.The crankshaft has a complicated alternating loadin the process of high speed operation.The static and dynamic characteristics of crankshaft have very important influence on the performance of the compressor.So the crankshaft strength analysis and vibration analysis is the necessarywork to crankshaft design.In this paper,6HS-F for balancing high speed of the crankshaft for the study,the main contents are as follows:(1)The thermodynamic principle of the compressor and the crankshaft stress analysis;(2)Usingthe Pro / E software establish 6HS-F dynamic balancing of high speed crank,barring device and a motor rotor shaft.The three-dimensional finite element entity model of compressor crankshaft include this three parts,and the static analysis of the crankshaft system is carried out by using WORKBENCH ANSYS finite element software.Calculate the strength of crankshaft,and obtain the safety factor of the dangerous part of the crankshaft;(3)To analysis the modal analysis and harmonic response of the crankshaft system.Modal analysis can get the first ten natural frequencies and modal shapes of the crankshaft,and the initial judgment can be caused by the vibration of the crankshaft;Initial judgethe natural frequency and vibration mode of the crankshaft,which can causethe crankshaft vibration;Harmonic response analysis can obtain force,amplitude of harmonic load frequency variation curve of crankshaft system which is under harmonic load.The resonance frequency is determined by the amplitude curve and the stress curve,and the strength of the crankshaft is calculated according to the stress curve;(4)Optimizing the structure parameters of the crankshaft,such as the stroke of the compressor and the length of the crankshaft,then establish of a three-dimensional model of the crankshaft.The static and dynamic analysis of the optimized crankshaft model is carried out,and compared with the results of the original crankshaft system.According to the comparison result,the influence of the optimized shafting on the speed of the compressor is judged.Through the aboveanalysis,some useful data and conclusions are obtained,which provide a theoretical guidance for the optimization of the crankshaft structure,and provide reference for the development of the high speed compressor.