Analysis on vibration of small-scale hydroelectric generating unit
Liying Wang, Lisha You
School of Water Conservancy and Hydropower, Hebei University of Engineering, Handan 056021, China
An analytical model for the vibrations of operating conditions of small-scale hydroelectric generating unit is developed based on frequency domain and time domain. Firstly the vibration of unit 2 in Xida hydropower station is tested by using intelligent data logger, where the DASP10 software is used to collect the data and analyse them; and then the data are analysed by the time domain analysis, shaft centreline orbit analysis and auto-spectrum analysis respectively. Finally some instructive conclusions on the exceedance of shaft degrees and the overweight phenomena are drawn, which may assist an overhaul to raise the operating efficiency and the power output.