Analysis on Hot Bending Vibration Characteristics of 600-MW Subcritical Steam Turbine Unit Rotors

doi:10.11930/j.issn.1004-9649.2014.6.86.3

Electric Power ›› 2014, Vol. 47 ›› Issue (6): 86-89.DOI: 10.11930/j.issn.1004-9649.2014.6.86.3

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Analysis on Hot Bending Vibration Characteristics of 600-MW Subcritical Steam Turbine Unit Rotors

AN Hong-wen^{1, 2}, HU San-gao¹, MA Zhi-yong¹, TENG Wei¹, LIU Yi-bing¹

1. School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China;
2. Jinglong Power Plant of Beijing Energy Investment Holding Co. Ltd., Fengzhen 012100, China

Revised:2014-01-09 Online:2014-06-18 Published:2015-12-08

Abstract

Abstract: In this paper, the study is carried out on the abnormal HP-IP rotor vibration with slowly increasing amplitude in one 600-MW subcritical steam-turbo generator. Through the analysis on the vibration characteristics during normal loading operation, startup process and shutdown process, it is concluded that evenly hot deformation occurs on one side of the rotor, which causes eccentricity in the same direction of the original unbalancing mass. The hot deformation may come from the uneven material property rather than the temporary hot deformation caused by uneven local heating. Under this rotor condition, special measures must be taken during shutdown process to prevent turbine damage from severe vibration.

Key words: 600-MW subcritical steam turbine unit, hot bending of rotor, vibration analysis

CLC Number:

TM621

AN Hong-wen, HU San-gao, MA Zhi-yong, TENG Wei, LIU Yi-bing. Analysis on Hot Bending Vibration Characteristics of 600-MW Subcritical Steam Turbine Unit Rotors[J]. Electric Power, 2014, 47(6): 86-89.

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Analysis on Hot Bending Vibration Characteristics of 600-MW Subcritical Steam Turbine Unit Rotors

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