Dynamic balance of different types of rotors

Dynamic balance of different types of rotors

Dynamic balance of rigid rotor

For rotors whose working speed is much lower than the critical speed, the deformation caused by the unbalance amount is small. The rotor can be handled as a rigid body, and the dynamic balance can be performed at a low speed, which is called the dynamic balance of the rigid rotor. In the rigid rotor dynamic balance, the centrifugal inertial force caused by the imbalance of each micro-segment can be simplified to any two selected sections (generally the two end faces of the rotor are selected), correspondingly on the two faces Correction (de-weighting or counterweight) completes the dynamic balance. A dynamic balancing machine can be used to find the orientation and size of the imbalance on the two sections.

Common dynamic balancing machines are divided into two types: soft support and hard support. The former detects the vibration caused by the unbalanced amount; the latter detects the force of the unbalanced rotor on the support. The problem of dynamic balance of rigid rotors has been solved better. At present, the International Organization for Standardization (ISO) has specified the accuracy of various types of rigid rotor dynamic balance.