Method for correcting permanent calibration and force-measuring balancing machine
First Claim
1. Method for correcting the empirically determined permanent calibration of a force-measuring balancing machine for measuring imbalance of a rotor rotatably mounted in the balancing machine in bearing supports having fitted sensing elements, the rotor having a rotor mass, the bearing supports having bearing support mass co-oscillating with the rotor mass, a selected stiffness, and rotor bearings having a selected spacing, comprising the steps ofcalculating resonant frequencies of the rotor to be balanced, in a translatory direction corresponding to a measuring direction of the sensing elements and in a rotational direction about an axis which is perpendicular to the measuring direction and to a rotational axis of the rotor, from the rotor mass of the rotor to be balanced, the co-oscillating bearing support mass of the bearing supports, the stiffness of the bearing supports and the spacing of the rotor bearings of the bearing supports, andintroducing to the permanent calibration a frequency response calculated from the resonant frequencies and the rotor frequency.
1 Assignment
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Accused Products
Abstract
Using a force-measuring balancing machine (1), the empirically determined permanent calibration is corrected in that the resonant frequencies (ω1) of the rotor (2) to be balanced are calculated, in a translatory direction and (ω2) in a rotational direction, from the mass (mR) of a rotor (2) to be balanced, which is mounted in the balancing machine (1), the co-oscillating mass (Ms) of the bearing supports (3), the rigidity (c) of the bearing supports (3) and the spacing (L) of the rotor bearings, and a frequency response calculated from the resonant frequencies (ω1, ω2) and the frequency (Ω) of the rotor (2) is introduced to the permanent calibration.
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Citations
4 Claims
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1. Method for correcting the empirically determined permanent calibration of a force-measuring balancing machine for measuring imbalance of a rotor rotatably mounted in the balancing machine in bearing supports having fitted sensing elements, the rotor having a rotor mass, the bearing supports having bearing support mass co-oscillating with the rotor mass, a selected stiffness, and rotor bearings having a selected spacing, comprising the steps of
calculating resonant frequencies of the rotor to be balanced, in a translatory direction corresponding to a measuring direction of the sensing elements and in a rotational direction about an axis which is perpendicular to the measuring direction and to a rotational axis of the rotor, from the rotor mass of the rotor to be balanced, the co-oscillating bearing support mass of the bearing supports, the stiffness of the bearing supports and the spacing of the rotor bearings of the bearing supports, and introducing to the permanent calibration a frequency response calculated from the resonant frequencies and the rotor frequency.
Specification