Theoretical Study and Experimental Research on Collision Fault of Shaft System of Siemens 1 000 MW Steam Turbine Unit

doi:10.11930/j.issn.1004-9649.201910064

Abstract

Abstract: During the shutdown process of a Siemens 1 000 MW steam turbine unit, the vibration occurred at the high-pressure rotor with the abnormal increase of its eccentricity, which has imposed high risk of permanent bending in the high-pressure rotor and endangered the operation safety of the unit. In this paper, the dynamic model of the shafting of the unit is established by using the finite element method. Then, the dynamic response of the high-pressure rotor with respect to dynamic and static frictions is analyzed and the rubbing fault characteristics of the high-pressure rotor are obtained. In addition, the abnormal vibration of the high-pressure rotor during the shutdown process of the unit is numerically simulated. The research results show that the rubbing of the gland seal during the shutdown process of the unit is the major cause for the abnormalities of the high-pressure rotor. Through the radial clearance test to adjust the radial clearance between the high pressure rotor and the cylinder, the problem has been solved successfully. Therefore, the high risk of permanent bending of the high-pressure rotor is eliminated.

Key words: Siemens 1 000 MW steam turbine unit, N+1 supported shafting, rubbing fault, high pressure rotor, permanent bending

CUI Yahui, YAO Jianfei, XU Yatao, QU Fulai, SUN Peng, WANG Zenghong. Theoretical Study and Experimental Research on Collision Fault of Shaft System of Siemens 1 000 MW Steam Turbine Unit[J]. Electric Power, 2020, 53(6): 133-139.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201910064

https://www.electricpower.com.cn/EN/Y2020/V53/I6/133

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