A4 Conference proceedings

Stresses of an AMB-supported rotor arising from the sudden contact with backup bearings


Publication Details
Authors: Sikanen Eerik, Halminen Oskari, Heikkinen Janne, Sopanen Jussi, Mikkola Aki, Matikainen Marko
Publication year: 2015
Language: English
Title of parent publication: Proceedings of ASME International Mechanical Engineering Congress and Exposition
Volume number: 4A-2015
ISBN: 978-079185739-7
JUFO-Level of this publication: 0
Open Access: Not an Open Access publication

Abstract
High speed technology has a fundamental advantage when compared to conventional motors. Active magnetic bearings (AMBs) are often needed in the high speed motors, as they can provide almost frictionless support and allowing control for the dynamics of the system. AMBs require backup bearings to avoid damage resulting from a failure in the component itself in the power system, or in the control system. During a rotor-bearing contact event, substantial impact forces may occur between the backup bearing and the rotor. In this study the rotor model is implemented using a finite element approach including backup bearings which are modelled as simplified cageless ball bearings. Based on results of this study, the increase in backup bearing misalignment can have proportional impact on the rotor bending and shear stresses in touchdown situation.

Last updated on 2017-22-03 at 13:39