Dynamic Response of Rotary Compressor Rotor System under Gas Load and Shaft Elastic Deformation

Rotary compressor has an eccentric shaft which causes excessive unbalance during operation.Unbalance can make vibration and noise problems, also reduce the service life of internal parts. We willestablish the mathematical model of gas load of the rotary compressor, and use CAD software to analyze thepositions of the mass centers of each part in rotary compressor. We can design the counterweights byconsidering the influence of unbalance, and then use MSC.ADAMS software to analyze the dynamicproperties of the rotary compressor in different counterweights settings. When we build the multi-bodydynamic models, there are two cases. In the first year, we set all components in rotor system as rigid bodies,but in the second year, we set the crank shaft as a flexible body. Actually, the crank shaft have somedeformation caused by centrifugal force. Finally, we can check whether the unbalance of shaft is reduced ornot by analyzing the displacement, the locus, and the acceleration of the shaft.