10MW급 프란시스 수차발전기 축계의 동특성 해석

The purpose of this research is to explain the characteristics of vibration for hydraulic turbine generator of shaft system. In design procedure, reviewing the dynamics of shaft vibration for Hydro generator including thrust and upper guide bearing, lower guide bearing, the shaft vibration has effect on an important dynamic characteristics of Francis Turbine Generator with vertical structure running at the rated speed 514rpm (8.57Hz) and the runaway speed. The main thrust of this work is to study the theoretical figures of hydro-generator with salient poles which is driven by hydraulic turbines running at lower speeds less than 1000rpm. Each pole is built thin silicon steel laminations of 0.35~0.5mm to 0.8mm thickness to reduce eddy current laminations. Low speeds are built with vertical shaft design which has suspended type where in the bearing is mounted above the rotor. So, this research is very useful for a practical designers and workers who are engaged in the shaft design for the development of the large hydro generator.