Study On Stress And Strain Of Vortex Disc Of Gradual Gear High Scroll Compressor Under Thermal-solid Coupling

The scroll compressor belongs to the volumetric fluid machinery.When it is running,the deformation of the dynamic and static scroll plates changes the axial clearance,resulting in reduced work efficiency.Therefore,the design of reasonable and accurate scroll model is an important basis for studying the stress-strain law and its influence of scroll under multiple loads.In this paper,based on the tooth head adhesion caused by the deformation of the vortex tooth caused by temperature and the leakage of the axial clearance of the dynamic and fixed scroll,the vortex tooth with gradually changing tooth height is proposed,which increases outwardly along the center tooth top of the vortex tooth.Taking the high-motion vortex tooth with tapered tooth as the research object,the temperature distribution law is obtained by establishing the nonlinear temperature distribution model,and the stress and strain of the high-motion vortex tooth with tapered tooth under nonlinear temperature load are analyzed.Due to the different physical properties of different materials,the influence of different materials on the involute high scroll tooth is studied.At the same time,based on the actual work of the scroll compressor,the thermal-solid coupling of the assembled scroll plate is studied.Specific research work is as follows:(1)In view of the problem that the temperature of the scroll plate cannot be directly measured in the work,the nonlinear temperature model of the scroll tooth is established based on the equivalent substitution method,and the temperature distribution laws of the inner and outer wall of the scroll tooth are obtained.(2)Based on the problem of tooth head adhesion caused by the deformation of the scroll tooth caused by temperature and the leakage of the axial clearance of the dynamic and fixed scroll,a gradient tooth high scroll tooth with an increasing ring along the top of the central tooth of the scroll tooth is proposed.The finite element software Workbench was used to analyze the deformation of vortex teeth with different gradient tooth heights under nonlinear temperature loads,and the optimal gradient tooth height range of vortex teeth was obtained.(3)Based on the differences of physical properties of different materials and their ability to resist temperature and gas force load deformation,the stress distribution,axial deformation and overall deformation of different materials under temperature,gas force load and their coupling are studied by Workbench finite element software,and the suitable materials for the production of gradient tooth high motion scroll are determined.(4)Considering the different deformations of the vortex tooth in the radial direction of the vortex disc,based on the research results of(2)and(3),the thermal-solid coupling analysis of the assembled vortex disc is carried out,and the deformation law and stress distribution of the vortex tooth of the vortex disc in the actual working state are obtained.