Abstract:In view of the high-speed working characteristics for scroll compressor spindle system,the discontinuous contact model with two-state was applied to dynamic modeling of joint clearance.On the basis of a horizontal scroll compressor,rigid flexible coupling model of the spindle system under different joint clearance was constructed by ADAMS/View.The running status and loading condition of some core components (such as orbiting scroll,crankshaft,cross slip ring and bearing) were deeply analyzed,which through dynamic simulation and calculation under the condition of flexible contact.The results show that the centroid trajectory of flexible crankshaft with ideal clearance(no clearance) is a nonstandard circle with fluctuations,while under a non-ideal state,there are multiple contact collision between the crank pin and needle bearing.When there is clearance in the bearing,the support reaction force in the Z direction is more continuous and concentrated,and its fluctuation amplitude will decrease with the increase of the joint clearance.When the clearance is 0.01 mm,it has an obvious influence on the acceleration of the orbiting scroll,which is not conducive to the formation of the volume cavity and gas compression.When the clearance is 0.03 mm or 0.05 mm,stress concentration and fatigue damage of the bearing system can be avoided,and it is also helpful to the maintenance of the bearing system and the prevention of the cross slip ring from rotating.