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Difference between revisions of "Balancing single/dual plane"
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[[Image:Unbalanced_shaft_schem.png|framed|center|''Unbalance : inertial axis does not coincide with rotational axis.<br> The unevenly mass distribution is represented by "m"'']]<br> | [[Image:Unbalanced_shaft_schem.png|framed|center|''Unbalance : inertial axis does not coincide with rotational axis.<br> The unevenly mass distribution is represented by "m"'']]<br> | ||
At higher speeds the shaft will deflect, due to is own stiffness. In that case, it might be considered as a rotor with flexible shaft. Depending on the position of the discs on the shaft they can even be inclined and thus create an oil whirl.<br> | At higher speeds the shaft will deflect, due to is own stiffness. In that case, it might be considered as a rotor with flexible shaft. Depending on the position of the discs on the shaft they can even be inclined and thus create an oil whirl. In that case, the Multiplane Balancing solution must be used.<br> | ||
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An increase of the running quality is achieved through reduction of the asymmetry by means of local addition or reduction of mass. Thus the inertial axis is moved to approach the rotational axis. Rigid rotors can be sufficiently balanced in one or two planes. In practice depending of the number of transducers used and the number of planes four cases can be considered. | An increase of the running quality is achieved through reduction of the asymmetry by means of local addition or reduction of mass. Thus the inertial axis is moved to approach the rotational axis. Rigid rotors can be sufficiently balanced in one or two planes. In practice depending of the number of transducers used and the number of planes four cases can be considered. | ||