Research On Rotor Vibration Control And Pipeline Damping Based On Integral Squeeze Film Dampe

In all kinds of equipment in the petrochemical industry,especially rotating machinery such as centrifugal pumps and pipe systems connecting various equipment vibration problems often bring hidden dangers to production safety.Based on the vibration problem of shafting in the process of rotor rotation,a damper supporting technology,the Integrated Squeeze Film Damper damper support,is proposed in this paper.The vibration reduction technology of rotor system,which is easy to be applied in engineering,is applied to different types of rotor systems with different characteristics.By exploring the vibration reduction characteristics of the damping support technology and analyzing the flow characteristics of the hollow air field in the disk cavity rotor system,the dynamics characteristics of the rotor system can be further understood.In the process of engineering projects,the damping vibration reduction technology is applied to the pipeline of each device,which effectively controls the vibration of the pipeline of petrochemical equipment and greatly enhances the safety of production.The main research contents are summarized as follows:(1)Aiming at the vibration of the centrifugal water pump transmission shaft,the ISFD is applied to decrease the vibration of the pump transmission shaft.The stiffness and damping coefficients of the designed ISFD were simulated and the dynamic characteristics of the centrifugal pump transmission shaft were analyzed according to the dynamic characteristics of the original rigid support and ISFD support.A test bench was built to simulate the working environment of the pump,and the vibration characteristics of the whole system were experimentally studied by comparing the rigid support and ISFD damping support installed before and after the pump bearing seat.(2)For a large rotor system,the large rotor tester with a rotor axis diameter of φ125mm or about 2.4m in length is designed.In order to control the vibration of the five-disc hollow rotor system,the damping support based on ISFD-needle roller bearing was applied to the five-disc hollow rotor system to realize vibration control of the five-disc hollow rotor system.The simulation analysis and experimental study of the effect of ISFD on the dynamic characteristics of the rotating subsystem are carried out in a five-disc hollow rotor system supported by an ISFD needle roller bearing designed according to the five-disc rotor system.(3)In order to explore the influence of the gas in the flow field around the rotor system on the rotor operation,a rotor-stator cavity experiment platform was designed.The gas flow field of the designed experimental platform was simulated,and the motion state of the air with high and low radius in the flow field was calculated respectively.Meanwhile,the aerodynamic force on the stator of the rotor disk cavity during rotor rotation was verified by the rotor experimental platform,and the flow characteristics of the gas in the rotor disk cavity were explored from the simulation calculation and experiment angles compared with the theoretical and simulation angles respectively.(4)Explore the vibration control problem of chemical equipment pipeline,and apply the viscous damping technology to the actual chemical equipment pipeline.Taking the outlet pipeline of circulating pump and the slurry circulation pipeline of a chemical plant as an example,based on the field layout of the pipeline,the reasons for the excessive vibration of the pipeline are analyzed,the reform plan of vibration reduction of the pipeline is formulated,and the effective vibration control of the pipeline is carried out by using the viscous damper.Several engineering vibration control examples have achieved excellent results.