Study on Unbalanced Vibration Characteristics of 1 000-MW Steam Turbine Shaft Series with N+1 Supports

doi:10.11930/j.issn.10.11930.2015.10.1

journal1 ›› 2015, Vol. 48 ›› Issue (10): 1-5.DOI: 10.11930/j.issn.10.11930.2015.10.1

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Study on Unbalanced Vibration Characteristics of 1 000-MW Steam Turbine Shaft Series with N+1 Supports

CUI Yahui¹, YAO Jianfei², ZHANG Junjie¹, BIN Guangfu3, QU Fulai⁴, BAI Guangchen⁵

1. Shenghua Guohua Beijing Electric Power Research Institute Co., Ltd., Beijing 100025, China;
2. Beijing University of Chemical Technology, Beijing 100029, China;
3. Hunan University of Science and Technology, Xiangtan 411201, China;
4. Guohua Zhejiang Provincial Energy Group Power Generation Co., Ltd., Ninghai 315600, China;
5. Shenhua Guohua Yuedian Taishan Power Generation Co., Ltd., Taishan 529228, China

Received:2015-07-04 Online:2015-11-25 Published:2015-10-25
Supported by:
This work is supported by National Natural Science Foundation of China(No. 51135001, 51205121); the Beijing Natural Science Foundation (No. 3132025) and Shenghua Guohua (Beijing) Electric Power Research Institute Co. Ltd. (No. JS-ZC-2012-2).

Abstract

Abstract: Due to the structural particularity of N+1 supported shafting, the unbalanced vibration characteristics of Siemens 1 000-MW steam turbine units are complex, which is likely to lead to vibration faults in practical operation. In this paper, units, the shafting dynamic finite element model is built based on the basic structure parameters of the units by using the finite element method. The critical speeds and vibration modes of the shafting are calculated by numerical simulation., the shafting response at the speed of 3 000 r/min is analyzed by weighting the ten axial balancing locations on the rotor respectively. Then, the sensitivity and rules of the shafting vibrations are obtained by comparing the weights and the locations. The conclusion can help the vibration monitoring and fault diagnoses in the operation process of the steam turbine units.

Key words: 1 000-MW steam turbine unit, N+1 supported shafting, critical speed, unbalanced vibration characteristics

CLC Number:

TK263.6+1

CUI Yahui, YAO Jianfei, ZHANG Junjie, BIN Guangfu3, QU Fulai, BAI Guangchen. Study on Unbalanced Vibration Characteristics of 1 000-MW Steam Turbine Shaft Series with N+1 Supports[J]. journal1, 2015, 48(10): 1-5.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.10.11930.2015.10.1

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Study on Unbalanced Vibration Characteristics of 1 000-MW Steam Turbine Shaft Series with N+1 Supports

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