High speed balancing machine HS 16 - HS 29
American Hofmannoration
In general the shafts of rotating machines are being balanced applying the methods for rigid rotors. Typically the unbalance of rigid rotors does not change within their speed range. However this is no longer valid for the rotors of turbomachinery (turbines, compressors, generator etc.). During run-up these rotors approach their first critical speed or they pass at least one critical speed. At the same time the vibrations and the dynamic bearing forces increase and the rotor unbalance is depending on the speed.
