Abstract
Industrial turbo machines such as the centrifugal compressor show a tendency toward speedup and the downsizing. If a speedup technology to pass high order critical speed with active magnetic bearings can be established, the downsizing of the train will be enabled because of increasing the number of the impeller stages per 1 case. As fundamental researches of this speedup technology development, we produced the high-speed balancing machine for the flexible rotor supported by AMB and tested it. As a result, in the design of the flexible rotor, we showed that we could regulate critical speed by mass distribution intentionally. In addition, we performed modal balancing method in high order critical speed and succeeded in the passage of the sixth order critical speed. Furthermore, we showed that N-cut and N-cross control was effective in the high order critical speed to the third bending mode.
