Vibration Excitation And Fluid Solid Coupling Analysis Of The Mechanical Sealed Bellows Structure

In this paper,mechanical seal bellows is taken as the object of study,the stiffness and the severe vibration of the bellows are numerically simulated and analyzed,the change of rigidity in U bellows is studied by changing the parameters of Multilayer Bellows.The analytical results indicate that the structure parameters of corrugated pipe on the structure stiffness of the bellows has a regulating function,you can modify the bellows wall thickness,find some of the bigger elastic modulus of the material to increase the stiffness of the role,and can also increase the peak,reduce wave distance to reduce the stiffness and axial analysis.The displacement of single and double torsion of bellows stiffness and axial stiffness,the compensation ability of Multilayer Bellows than monolayer.Through the vibration simulation of bellows.Understand the vibration mode of the bellows in the three constraint conditions and operation conditions.At the same time through the tube ends constraint on the U type corrugated vibration type change,get the necessity of the research and Analysis on the damping performance and vibration of U type corrugated pipe.The amplitude of the axial and transverse excitations and phase angle through the study of U type corrugated pipe.Through the comparison of U type corrugated pipe to absorb the vibration of the structure.And the analysis in response to changes in the beginning period of bellows bellows vibration change speed is obtained,then the phase angle of the sine changes.The relatively large stiffness test of corrugated pipe,so the stiffness requirements of corrugated pipe in the beginning is relatively high.To compare the changes of axial and transverse excitation and excitation,we can draw the influence on the vibration amplitude of the corrugated pipe material,from which we can draw in the sandwich bellows if adding damping material good,can greatly reduce the lateral vibration of the harmful damage bellows.Considering the influence of prestressed case,phase change of the mode of vibration resistance,the prestressed larger bellows vibration increases Big.The U type corrugated pipe coupling model to study the effect of flow on the corrugated pipe.Comparing the fluid solid coupling under the bellows and no fluid solid coupling bellows under the natural frequency and vibration mode,found the natural frequencies of fluid solid coupling corrugated pipe under the higher vibration,more intense,more close to the actual value.Provide a theoretical basis for structure optimization after the bellows.