Cylinder Dryer Key Parts Structure Analyis

Drying cylinder is the most important and irreplaceable key part of cylinder dryer(herein after short as “dryer”). With processing and conveying material, drying cylinder isa major part of dryer to realize its function. Due to incorrect design, manufacturing anduse, it’s very easy to damage, which leads to severe economic losses to customer, andbrings prestige risk to producer.Based on theory of dryer working condition and structure design, referring tostructure of existing dryer and summarizing design experience of dryer, this articleprovides the final design scheme of drying cylinder as key part based on analysis andjudgment of current dryer’s problems according to technical data and technologicalrequirements of drying cylinder. The scheme determines preliminarily the form, quantity,thickness and size of supporting spring plate on drying cylinder, the structural style ofcylinder reinforcement and requirements of assembly accuracy of drying cylinder springplate as well as the improvement of driving mode of gear motor. On this basis, structuralstatic finite element analysis of key parts on drying cylinder are made through the largefinite element analysis software ANSYS, which optimize the design scheme of dryingcylinder and improve the design of dryer.Firstly, this article introduces the dryer function theory and structure in brief, andanalyzes the problems which happened in past running. Secondly, the existing two typesof drying cylinder with different spring plate are finite element analyzed respectively(under operating status of dryer). This article analyzes the stress and deformation of highloaded location of cylinder, and finds the main reason caused the problem through analysis.Finally, optimizing the structure of drying cylinder according to appeared problems,including analysis the axial and radial quantity of spring plate, structure form and size ofspring plate, and finally determines the optimizing scheme of cylinder dryer. Throughfinite element analysis and coMParison of optimized drying cylinder, the optimizingscheme is confirmed as reasonable and feasible. Meanwhile, through this method, theoptimizing scheme for other dryers with different sizes is determined together. It’s also reasonable and feasible.This thesis establishes entity model using three-dimensional software Solidworks andsets up finite element model through rational simplification handle with contact, friction,loading and the other boundary conditions. Through a large number of finite elementanalyses, the reason of problems has been found and the drying cylinder structure has beenoptimized, and the rationality and feasibility of drying cylinder structure after optimizinghave been verified, which provides reliable basis for complete structure design,manufacturing and use of dryer.