Research On Bearing-rotor System Dynamic And Tribology Coupling Character Of Rotary Compressor Based On Flexible Shaft

Bearing-rotor system is the key mechanism system in rotary compressor. Thelubrication performance of the bearing-rotor system directly affects the overallperformance and service life of the compressor. Dynamics analysis of bearing-rotorsystem and lubrication performances of journal bearings play a very important part inensuring the system smooth running, improving mechanical efficiency and extendedservice life.This paper based on the actual rotary compressor, a multibody system dynamicssimulation model of bearing-rotor system was established on MSC-ADAMS, and dynamicloads of the bearing-rotor system in a cycle were obtained by dynamic simulation. Base onReynolds equation, a model of journal bearing hydrodynamic lubrication numericalanalysis is created. In order to simulate coupling system dynamic behavior tohydrodynamic lubrication in bearing-rotor system, the redeveloping technique ofMSC-ADAMS was using. A rigid-flexible mutibody system dynamics simulation modelof bearing-rotor system was established, this model coupling with tribology, dynamicanalysis and theory of elasticity. Then minimum oil thickness, oil film pressure, rotor orbitand friction power were determined. The result of analysis provides reference informationfor optimization design of structure of bearing-rotor system. This paper also studied theabrasion of bearing-rotor system, discussed the law of abrasion and found the cause. Thiswork provides theoretical support for further calculation and analysis.