S&M Young Researcher Paper Award 2020
Recipients: Ding Jiao, Zao Ni, Jiachou Wang, and Xinxin Li [Winner's comments]
Paper: High Fill Factor Array of Piezoelectric Micromachined
Ultrasonic Transducers with Large Quality Factor

S&M Young Researcher Paper Award 2021
Award Criteria
Notice of retraction
Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.

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Modeling, Analysis, and Simulation of Auxiliary Bearing for High-speed Rotating Machinery

C. Bambang Dwi Kuncoro, Rafael Oscar, Chung-Che Liu, Chao-Yun Chen, Kuo-Shu Hung, and Yean-Der Kuan

(Received May 2, 2021; Accepted September 10, 2021)

Keywords: rotor, contact force, magnetic bearing, finite element, touchdown

An active magnetic bearing (AMB) revolutionizes rotating machinery applications by eliminating the friction problem of conventional contact bearings and the need for lubrication. Supporting equipment is necessary as a countermeasure in case the AMB fails to operate or its magnetic field decreases in power, causing the rotor to fall, known as a dropdown event. An auxiliary bearing is necessary to prevent direct contact between the rotor and the AMB, as the AMB itself is not designed to be durable against impact or rotational friction. Therefore, the auxiliary bearing is designed to absorb and withstand the contact force. This aim of this study is to find the best design for the auxiliary bearing to decrease the erratic and whirling motion of the rotor after contact. The non-lubricated Hertzian contact model is used to analyze the rotor drop dynamics, and the finite element method is used as the basis of the flexible rotor model. A simulation is carried out using MATLAB software. The simulation reveals the rotor orbit, rotor response, and contact force, provides a comparison of the stiffness support and damping support effects, and also predicts the bearing life to provide a new approach for bearing selection. The results of this study provide the relevant information for selecting the material of the auxiliary bearing with the most appropriate damping and stiffness properties to disperse the contact force during a rotor drop event.

Corresponding author: Yean-Der Kuan




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