Research on the Dynamic Characteristics of the Rod Fastening Rotor

DOI

10.2991/iceep-18.2018.173How to use a DOI?

Keywords

Rod rotor, Contact effect, Pre-tightening force, Modal analysis, Natural frequency

Abstract

Modern large-scale gas turbine’s rotor is mainly rod fastening rotor. The contact friction force between wheels, the pre-tightening force of the rod and bearing system have an effect on the rotor dynamics. According to the structure characteristics of the rod fastening rotor, contact model is established. In the rotor model, contact friction, the pre-tightening force of rod and bearing system is included to get natural frequency and mode shape. According to the analysis of the rotor dynamics, when the pre-tightening force is increased, the contact stiffness and the natural frequency of the system would be increased. The natural frequency is increase fast when the pre-tightening force is small. With the increase of the pre-tightening force, the tendency of the natural frequency is slow. The characteristics of bearing system change with speed. The variety of oil film dynamic coefficients also has some impact on the inherent characteristics of the rotor.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yiping Li
PY  - 2018/09
DA  - 2018/09
TI  - Research on the Dynamic Characteristics of the Rod Fastening Rotor
BT  - Proceedings of the 2018 7th International Conference on Energy and Environmental Protection (ICEEP 2018)
PB  - Atlantis Press
SP  - 980
EP  - 985
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceep-18.2018.173
DO  - 10.2991/iceep-18.2018.173
ID  - Li2018/09
ER  -