he paddle dryer of Changzhou Fengri Powder Equipment Co., Ltd. is likely to cause unbalanced centrifugal force when rotating. The centrifugal force will produce forced vibration, which will lead to the destruction of bearings and other mechanical parts, so the rotor of the hollow blade dryer must be balanced. If the diameter of the rotor is small, the mass of the blocking plates on both sides of the rotor can be changed so as to balance.