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http://dx.doi.org/10.5050/KSNVN.2007.17.12.1238

Root Cause and Countermeasure on the Spike Vibration of a 550MW Class USC(ultra super critical) Steam Turbine  

Yang, Seong-Heon (두산중공업㈜ 증기터빈기본설계팀)
Kim, Yong-Seok (두산중공업㈜ 증기터빈기본설계팀)
Nah, Un-Hak (두산중공업㈜ 증기터빈기본설계팀)
Park, Jong-Geun (한국동서발전㈜ 기술전문팀)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.17, no.12, 2007 , pp. 1238-1245 More about this Journal
Abstract
A very abnormal vibration was occurred at the LP(low pressure) turbine continuously during the pre-operation for a 550MW class USC(ultra super critical) steam turbine. This vibration was initiated at the rotating speed of about 3,450 rpm and then the vibration amplitude was highly increased the number by $2{\sim}3$ times with the increase of the rotating speed to the rated speed (3,600 rpm). In this paper, this abnormal vibration named spike vibration. This spike vibration was caused by the rubbing between the rotating bucket tip seal and the lower half of spill strip. Also, this paper presents the mechanism of the spike vibration and the proper method to eliminate this abnormal vibration problem. This result would be good practice to find the solution of similar high vibration in the USC steam turbines for power plant as well as industrial rotating machineries.
Keywords
Spike Vibration; Rubbing; Steam Turbine; Bucket Tip Seal; Orbit; Shaft Centerline Movement; Damping; Critical Speed;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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