Analysis Of Forced Vibration Of Cylinder And Optimization Design Of Cylinder Structure

Cylinder,as the main bearing part of compressed gas in reciprocating compressor,has a crucial influence on the compressor whether it works normally.In the process of compressor operation,the cylinder will be affected by both static load and dynamic load,and the internal alternating load may cause unconventional vibration of the cylinder,which will affect the normal operation of the compressor and even cause serious safety accidents.In order to ensure the smooth operation of compressor and avoid accidents,the analysis and research of cylinder is a key task.In this paper,three cylinders of the same type in China are taken as the research object to study the general law of vibration of this type of cylinder under actual working conditions.Firstly,the Static load of each cylinder is analyzed according to the rated working condition of each cylinder,and the three-dimensional model of each cylinder and piston is established by Creo.The Static Structural module of ANSYS is used to analyze the strength of piston,so as to study the interaction between piston and cylinder.Then the module is used to carry out static analysis on the cylinder,get the equal effect diagram of the cylinder,and optimize the structure of the stress concentration parts.Secondly,using the ANSYS Modal module free Modal analysis and constraints for each cylinder to the Modal analysis,analysis of various cylinder get free Modal frequencies and constraint Modal frequency and the corresponding frequency of the vibration mode figure,easy happening to analyses emphatically the key of the resonance frequency,and the frequency of resonance vibration mode of the drawing under weak structure optimization.Then,the Transient Structural module of ANSYS was used to analyze the Transient response of each cylinder,and the equal effect diagram and deformation diagram of the cylinder under the joint action of static and dynamic loads were obtained.The vibration intensity of each key node was solved,and the optimization scheme was proposed to solve the Structural defects.Finally,simulation analysis is carried out to verify the rationality of the optimization scheme.The results show that the inherent characteristics of this type of cylinder are effectively improved,the stress concentration structure is effectively optimized,and the vibration of the cylinder under actual working conditions is effectively controlled.