Rotor Balancing Method and Device

The present invention relates to the technique for dynamic balancing of rotating bodies and may be used for measuring and correcting forces generated by unbalance of rotors, in particular, rigid rotors. The claimed method allows measurement of the rotor imbalance parameters with high accuracy in two imbalance datum planes. The method is based on imparting of oscillatory motion to a rotor and to a coaxial balanced body relative to a fixed point selected at the common axis of the rotor. To increase accuracy of the method, simultaneously in each time in the plane passing through the above fixed point, forces opposing angular oscillations of the balanced body relative to an axis are exerted to the balanced body tangentially. To eliminate an interference of imbalance datum planes on the parameters to be measured, at one stage of measurements the said fixed point is used as the crossing point of the rotor axis with one of the imbalance datum planes, whereas at the next stage the rotor is along its axis by a fixed distance to a second position. The measured parameters are used to determine imbalance parameters in two imbalance datum planes. A device for the rotor balancing comprises a bed plate, a shaft mounted on the rotor, said shaft being installed inside the balanced body on a flexible support to move along the balanced body axis. The rotor shaft is provided at one end with a spherical support and joined to a drive shaft with a variable eccentric. Moreover, it comprises a flexible support located in the plane passing through said spherical support center. The device has a simple and reliable scheme for measuring parameters of the rotor imbalance.