Abstract: In order to solve the electromagnetic sound,this paper has researched the starting force and the electromagnetic sound. Via theoretical calculation of the electromagnetic force and deflection for eccentric rotor, comparing the starting performance of the compressor and the system at different coaxiality clearance, the relationship between stator/rotor clearance and starting performance is obtained in this paper. By comparing the reinforced structure of the shaft system of the pump, an optimized pump scheme solving the electromagnetic sound during starting is obtained. The paper can be used as a reference for the design and development to be made in the future.

Key words: Rotary Compressor, Electromagnetic sound, Shaft system intensity, Abnormal sound during starting