Eventos Anais de eventos
DINAME 2017
XVII International Symposium on Dynamic Problems of Mechanics
Stability Diagnosis for Rotor–Seal System by Utilizing Active Magnetic Bearing
Submission Author:
Wataru Tsunoda , Kanagawa , Japan
Co-Authors:
Wataru Tsunoda, Christian Wagner, Tobias Berninger, Thomas Thümmel, Daniel Rixen
Presenter: Wataru Tsunoda
doi://10.26678/ABCM.DINAME2017.DIN17-0048
Abstract
Rotational machinery usually pressurizes or compresses fluid in a plenum. However, a seal, which prevents a leakage of liquid from a plenum, causes self-excited vibration due to the cross-coupled stiffness at a high rotational speed, and then the instability leads to a breakdown of the system. Thus, a stability diagnostic method is necessary for the stable and safety operation. On the other hand, an active magnetic bearing (AMB) has a superior controllability to other bearings, although it does not have a large load carrying capacity. Recently, excitation by active magnetic bearings to diagnose stability has been proposed, and most of them have focused on measuring coefficients of seals. On the other hand, the purpose of this research is to diagnose the stability by estimating the rotational speed at which self-excited vibration occurs by utilizing an active magnetic bearing. This method is experimentally evaluated with our test rig.
Keywords
Dynamics of rotating bodies, Seal, Active magnetic bearing, Self-excited vibration, Stability diagnosis
