Research On Pipe Vibration Suppression With Partical And Application Of Honeycomb Seal Technology

In the field of petrochemical industry,equipment vibration and seal leakage always are major hidden danger affecting the safe operation and normal production of units.In chemical production,major accidents caused by excessive vibration of pipes and rotors are common.The problem of excessive axial force burning down the main push force bearing bush when the supercharger runs under high pressure also happens from time to time.These are the urgent problems to be solved in the project.In this paper,a particle damper was designed to reduce the vibration of chemical pipeline.Aiming at the problem of excessive rotor axial force caused by the failure of interstage seal of supercharger,a honeycomb seal technology was used to transform the supercharger.To solve the unbalance vibration problem of tie rod rotors,an optimization scheme of bolt arrangement of tie rod rotors was proposed to reduce the unbalance of rotors from the Angle of assembly.The main research contents are as follows:(1)By collecting pipeline vibration data in the chemical plant,the characteristics of pipeline vibration,including the vibration frequency range and amplitude of the pipeline,were determined.A pipeline vibration test rig was built in the laboratory to simulate the pipeline vibration.A square particle damper was designed to explore the vibration damping response under different frequencies when it was filled with steel beads of different particle sizes,and the optimal filling rate for vibration damping effect under different particle filling amounts.The experimental results show that the particle damper has a good damping effect on pipeline vibration,and the damping effect of particle dampers with different particle sizes is different,and the vibration damping effect of particle dampers with different frequencies is also different.The general particle filling rate is about 95%,and the vibration reduction effect is the best.(2)Aiming at the problem that the temperature of the main thrust bearing shingle was too high in the production process of air separation supercharging unit in a coal chemical plant,through theoretical analysis and Computational Fluid Dynamics(CFD)software simulation calculation,It was determined that the failure of the interstage seal is the main reason that causes the axial force of the rotor to increase,and the honeycomb technology was reformed for the interstage seal of the supercharger.Finally,the improvement of the interstage seal structure reduced the interstage gas flow of the supercharger,reduced the pressure difference between the high-pressure gas on both sides of the impeller,reduced the axial thrust greatly,and improved the compression efficiency at all levels.The problems such as the high temperature of the thrust bearing pad and the insufficient pressure at the gas outlet was solved.At the same time,by calculating the dynamic characteristic coefficient of each honeycomb seal and the vibration of the supercharger rotor in two states,the damping principle of the honeycomb seal on the supercharger rotor was analyzed.(3)Based on the analysis of the reasons for the unbalanced vibration of the traditional tie rod rotor,a new bolt assembly arrangement method was designed,and compared with the other two arrangement methods to compare their residual unbalance size.The effectiveness of the new arrangement method is verified by the comparison of the vibration of the tie rod rotor through ANSYS simulation and test.Finally,through simulation and test,the conclusion is reached that the residual unbalance of the rotor can be greatly reduced and the vibration of the rotor can be reduced by optimizing the arrangement of the bolt of the tie rod rotor.