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http://dx.doi.org/10.5050/KSNVN.2008.18.2.238

A Case Study on the Vibration by Fluid Induced Instability at Large Steam Turbine-generator  

Han, Seung-Woo (한전KPS 기술연구원)
Roh, Cheol-Woo (한전KPS 기술연구원)
Yoo, Mu-Sang (한전KPS 기술연구원)
Kim, In-Chul (한전KPS 기술연구원)
Joo, In-Gouk (한전KPS 기술연구원)
Kim, Myong-Shik (한전KPS 기술연구원)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.18, no.2, 2008 , pp. 238-246 More about this Journal
Abstract
This case study refers to turbine-generator with retrofitted turbine rotor. Vibration problem occurring after the retrofit was mainly due to high vibration from exciter side. However, repeated test run and operation during scheduled maintenance caused high vibration from generator bearing, and post-overhaul test run before turbine vibration correction caused oil whip on the bearing. This case study shows how to analyze vibration condition of high turbine generator vibration detected during the post-overhaul test run and vibration condition of offline and online data to reflect it on establishing maintenance schedule and overhaul correction procedure. Vibration data could be acquired during steady load operation or even with varying speed and load. Each data is important for machinery condition evaluation. This case study shows that the vibration data during extreme condition is the key factor in analysis, which helps to find the machinery problem.
Keywords
Turbine-generator; FRF; Fluid Induced Instability;
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  • Reference
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