Vibration and critical characteristics of the tilting pads journal bearing-rotor system
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 4 December 2018
Issue publication date: 5 March 2019
Abstract
Purpose
High power rotating machinery requires large diameter bearings that can perform under extreme conditions. Vibrations and critical speeds of rotor supported by tilting pad journal bearing (TPJBs) exceeding their design limits may cause unit failure. This paper aims to investigate the experimental technique for large diameter bearings.
Design/methodology/approach
To obtain the experimental support for rotor-bearing system design, an experiment focusing on vibration monitoring is given. The sensors arrangement, monitoring system and critical speed identification method are provided.
Findings
By using test bench in factory unit, a large amount of vibrations data of different working situations is obtained. In addition, a method named non-excitation identification for critical speed is proposed. The critical speed of rotor identified through vibration data is given. The theoretical calculation results are also presented.
Originality/value
The basis for rotor-bearing system design can be obtained through comparisons between the experimental results and the theoretical calculation data.
Keywords
Acknowledgements
The National Natural Science Foundation of China (No.51305246), Scientific Research Plan Projects of Shaanxi Education Department (No. 17JK0110), the scientific research project of SUST (No.BJ13-07), and Key Research and Development Program of Shaanxi (No. 2017GY-168) financially supported this work.
Citation
Zhao, Z., Ji, F., Guan, Y. and Yuan, X. (2019), "Vibration and critical characteristics of the tilting pads journal bearing-rotor system", Industrial Lubrication and Tribology, Vol. 71 No. 2, pp. 295-300. https://doi.org/10.1108/ILT-03-2018-0112
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited