Dynamic imbalance is a very common imbalance, which is a combination of static imbalance and even imbalance.
After the unbalanced rotor is corrected by dynamic balance, it not only eliminates the even imbalance, but also eliminates the static imbalance. At this time, the central inertia main axis and the rotation axis of the rotor are completely identical, and the rotor is balanced. But the ideal is that the fullness of the reality is bone-like. It is impossible to balance an unbalanced rotor to an unbalanced amount of zero. Because of the accuracy of the dynamic balancing equipment and the limitations of the rotor. Therefore, there is a concept of balance accuracy, that is, a reasonable numerical magnitude that we can achieve under the existing conditions, thus satisfying the requirements of production and life and meeting the economic requirements.
what circumstances do you want to check the balance?
Accuracy requirements for dynamic balancing machines
To make the balance accuracy of the rotor high (that is, the amount of residual imbalance is small), it is necessary to eliminate the factors that affect the accuracy of the imbalance. Among these influencing factors, the transmission mode of the balancing machine and the imbalance of the transmission parts have a great influence. The journal accuracy of the rotor should also be strictly limited. There is also a rotor member with an impeller, a rotor whose center of gravity is not at the center of the rotor, a bearing bottom sleeve and a rotor that seals the packing.
Rotor automatic balance machine - rotor dynamic balance process and method
For rotors with a large initial imbalance and excessive vibration during rotation, a one-sided balance must be performed before dynamic balance verification to eliminate static imbalance. Sometimes due to improper selection of the correction surface position (ie, the center of gravity is not within the selected correction plane), correcting the static balance will increase the even imbalance. Therefore, the correction surface is selected to be performed in the plane of the center of gravity to reduce the even imbalance. If the plane of gravity is not allowed to be de-duplicated, it should generally be performed on two planes on both sides of the plane where the center of gravity lies.
