Research On Suppressing Rotor Vibration By Integral Squeeze Film Damper And Pipeline Vibration Restrains

Vibration problems are more common in rotating equipment and chemical pipelines.Aiming at the instability of rotor system due to imbalance,misalignment and rub-impact in the process of rotating machinery,an elastic damping support structure-Integral Squeeze Film Damper(abbreviated as ISFD)was designed to study the vibration control effect of the damper on the faulty rotor.For the common pipeline vibration problems in the chemical industry,a new type of viscous dampers was used to complete the pipeline vibration reduction retrofit project,and the application of damping and vibration reduction technology to pipelines was studied.The main works are summarized as follows:(1)Based on the Squeeze Film Damper(abbreviated as SFD),an elastic damping support structure consisting of an integral squeeze film damper and a rolling bearing was designed.The principle of vibration reduction was analyzed and the finite element software was used.And the stiffness characteristics of the damper was calculated.(2)Study on the integral squeeze film damper controlling unbalance vibration of the rotor system.A single-span unbalanced rotor model was established.The vibration control effect of the integral squeeze film damper was simulated using the finite element method.A single-spindle rotor test stand was set up to simulate the rotor imbalance failure,and the suppression effect of the integral squeeze film damper on the unbalanced rotor vibration was studied.(3)Study on the integral squeeze film damper suppressing the rotor misalignment vibration.The misalignment rotor model was established to analyze the mechanism of misalignment rotor vibration.The vibration control effect of the monolithic squeeze film damper was simulated using the finite element method.A single-spindle rotor test stand was set up to simulate the misalignment of the rotor,and the suppression effect of the integral squeeze film damper on the misalignment rotor vibration was studied.(4)Study on the integral squeeze film damper suppressing the rotor rubbing vibration.A rub-impact rotor model was established to analyze the vibration mechanism of the rub-impact rotor.A single-span rotor test-bed was set up to simulate the rub-impact fault of the rotor.The inhibitory effect of the integral squeeze film damper on the vibration of the rub-impact rotor was studied.(5)Study on the integral squeeze film damper suppressing the vibration of the double disc cantilever rotor.A single-span double-disk cantilever rotor model was established.The effect of cantilever length and support type on the critical rotation speed of the rotor system was calculated using the finite element analysis.A single-span double-disk cantilever rctor test stand was built to study the integral-squeeze film damper for single spans.The inhibitory effect of the integral squeeze film damper on the vibration of the double disc cantilever rotor was studied.(6)Study on the application of damping vibration technology in pipelines.Taking the inlet pipe of the piston pump of a petrochemical enterprise in Hebei as an example,the cause of pipeline vibration was analyzed,and a new type of viscous damper was applied to study the vibration damping technology of the pipeline.