Research On Vibration Control Of Reciprocating Compressor Pipeline Based On Particle Damping

Industrial pipelines are important components in industrial production processes,often connected to power equipment such as compressors and pumps,carrying important functions such as material transportation,pressurization,and pressure reduction.They are the "highway" for material transmission in industrial production.Long term excessive vibration is the fundamental cause of fatigue and injury to pipeline structures,detachment of instruments installed on pipelines,and desensitization of supporting components.Huge pipeline vibrations can lead to pipeline fatigue and cracking,leading to internal fluid leakage and safety issues.The research on pipeline vibration,noise and their control technology is a fundamental prerequisite for solving practical engineering problems and guiding engineering practice to meet industrial production needs.Particle dampers are often used in vibration control of industrial pipelines due to their obvious damping effect,high reliability,and ease of installation.However,the vibration reduction mechanism and setting method of particle damping materials are not yet complete.This article takes industrial pipelines as the research object,and based on whether particles exhibit interlayer misalignment flow under different vibration intensities,theoretical models are established and particle damping vibration reduction design schemes are developed to analyze the vibration reduction mechanism.The research results show that under small vibration conditions without misalignment flow,based on the virtual energy surface theory,the energy dissipation excitation of particles is equivalent to the pulsating collision force and friction energy dissipation between particles and pipelines,The vibration response of the structure can be obtained;Under high vibration conditions,a staggered flow is formed between particles.Based on the gas-particle two-phase flow theory,an equivalent transient viscous damping model of particles is constructed to obtain the damping force of particle damping.Based on particle damping models under different vibration intensities,particle dampers under different vibration intensity conditions were designed and theoretically verified using actual engineering.The specific research contents are as follows:(1)Study on dynamic characteristics of reciprocating compressor pipelineFirstly,based on the stress balance condition of the pipeline unit,the mode function,frequency equation and frequency response function of the equal interface pipeline under typical boundary conditions are obtained.The influence of pipeline structural parameters and material parameters on pipeline mode,frequency and vibration mode under different constraints is theoretically solved.Based on the working characteristics of reciprocating compressor,starting from the pulsation mechanism of reciprocating compressor and aiming at reducing pipeline vibration,the influence of pipeline structural parameters and material parameters on fluid characteristics under constant boundary is studied.The fluid-solid coupling equation of the pipeline is established to study the effects of fluid pressure,flow rate and viscosity on the vibration of the pipeline.(2)Theoretical analysis of pipeline damping based on particle dampingBased on collision mechanism and multiphase flow theory,the pipeline dynamics model based on particle damper is established.The vibration reduction mechanism of particles set on the pipeline and the mathematical model of interaction between particles under the pulsation mechanism of reciprocating compressor are studied.The vibration reduction mechanism of particle damping under different vibration intensities is analyzed,the calculation method of particle damping applied to compressor pipeline is also explored.(3)Research on vibration reduction application of compressor pipeline based on particle dampingThe coupling analysis between the design of pipeline industry and the dynamic characteristics of pipeline is carried out,the particle damping shock absorber with pipeline damping is designed,and the particle damping control method of compressor pipeline vibration is proposed.According to the actual situation that the pipeline vibration of a chemical enterprise exceeds the standard,the root cause of the pipeline vibration exceeding the standard is diagnosed through model test,compressor offdesign condition test,vibration pressure spectrum analysis,etc.Combined with the standard and the actual situation on site,the pipeline vibration control scheme is developed and rectified.The vibration values of compressor before and after rectification are compared and analyzed to verify the feasibility of vibration reduction of particle damping pipeline.