Experiment on ISFD suppressing fluid excited vibration of seal-rotor system

YAN Wei, HE Li-dong, KANG Jia-ni, JIA Xing-yun, ZHANG Yi-peng
(College of Mechanical and Electrical Engineering, Beijing University
of Chemical Technology, Beijing 100029, China)

Abstract: In order to improve the fluid-excited vibration problem of the seal-rotor system, a novel integrated squeeze film damper (ISFD) was proposed. Based on ISFD, a dynamic model of the seal-rotor system was established and an experimental platform of the system was built to explore the influence of ISFD on the dynamic characteristics of the rotor. During the experiment, the vibration amplitude changes of the rigid support and ISFD support sealrotor system were compared under certain working conditions. The experimental researchs on the response changes of the sealrotor system under different speed and different eccentricity conditions were carried out. The experimental results show that under different working conditions, comparing with rigid supports, the vibration amplitude of ISFD support seal-rotor system is reduced by 40%~70%, and ISFD makes the axis trajectory of the rotor approach from a complex shape to oval. It can be seen that ISFD has a good suppression effect on the vibration caused by the rotor imbalance force and the fluid excitation force, and effectively suppresses the fluid excitation of the rotor-sealing system.

Key words: fluid exciting force; vibration control; integral squeeze film damper (ISFD); dynamic characteristics