Study On Interface Of Interference Fit Dismantling In Compressor Impeller And Shaft

The study of remanufacturing engineering dismantling interface had important value, not only enriched the the content of the interface research, but also had been conducive to promote the development of remanufacturing.In this paper, by using theoretical model derivation, FEM simulation calculation, dismantling simulation experimental and other methods to analyse the morphology of compressor impeller and shaft dismantling interface. Firstly, the paper main analysed the interface morphology before dismantling, used finite element software ANSYS to analyse the overall stress-strain distribution and the stress state of the contact interface with impeller and shaft interference fit, obtained that maximum stress-strain and maximum deformation of impeller and shaft appeared the edge of the contact surface, stress and deformation of the contact surface were well-distributed along the circumferential surface, and the stress and total deformation of both ends of the edge were higher than the total deformation and stress of intermediate region. Then by using M-B model derived theoretical relationship between the load and the contact area. In order to explore microcosmic morphology, reused W-M function to create a simplified model to simulate the interference fit contact interface, then use the finite element software to calculate, analysed elastic and plastic contact area of the contact interface and stress and deformation of surface asperity, the results of theoretical analysis and simulation results could mutual authentication, obtained the contact interface specific parameter values under the different loads, found the central region deformation of asperity was the maximum, equivalent stress of the asperity shoulder was the maximum, shoulder region may lead to interface with the initial crack initiation, overall maked the interference fit contact interface before dismantling for microcosmic morphology quantify description. This paper was also designed dismantling simulation experimental, from different perspectives analysed specimen surface damage characteristic and affect factors of damage, summarize damage law under different loads, extracted important surface parameters for evaluating the extent of surface damage to establish surface damage evaluation system.