Synchronization identification method for unbalance of dual-rotor system

The inner rotor of the dual-rotor system is usually encapsulated by the outer rotor. Therefore, it is very difficult to get the unbalance of rotors by directly adding a trial weight on the inner rotor to obtain the inner rotor’s reference signal. This paper proposes a new method to sense the inner and the outer rotor’s unbalance by adding the trial weight only on the outer rotor. There are four parts: part-I introduces the structure and vibration features of a horizontal decanter centrifuge. Part-II illustrates principles of the new method. Then in part-III we analyze factors affecting the dynamic balancing precision via numerical simulation. In the end, the new method is tested in experiments, which reveals an excellent performance on identifying the unbalance, thus possessing a promising future in the relevant industry.