Online dynamic balance compensation device for high-speed motorized spindles

The utility model relates to the technical field of online dynamic balance of spindles, in particular to an online dynamic balance compensation device for high-speed motorized spindles. Basically, two compensation devices are used to synthesize an unbalance vector to balance the unbalance vector of a rotor of a motorized spindle. Compared with the prior art, the compensation device is simple in structure and convenient to install. During compensation, the unbalance vector of the rotor is balanced by changing relative positional relation between a balance ring with the unbalance vector and the rotor in the compensation device, weight is not increased or decreased, mass of the rotor is not destroyed, and stoppage is avoided. In addition, elastic elements are added to two sides of the balance ring, so that constant application of external force to the balance ring during compensation is avoided and energy consumption is lowered.