Finite Element Analysis And Optimization Design Of Rotary Gear Ring Of Tower Crane

Gradually along with the use of land resources, construction of high altitude is theinevitable developing trend of the future construction of tower crane as large altitudebuilding one of the indispensable construction machinery, will be more and more importantrole. Tower crane slewing ring gear in axisymmetrical part of tower crane, often appear inthe process of its use of mechanical failure, slewing ring gear damage accounted for a largeproportion. Gear ring, as a major undertaker bearing load and transmission power, influencethe working performance and stability of tower crane, slewing ring gear maintenance isusually change gear ring, efficiency is low, and the ring gear manufacturing cycle is long,thus the optimal design of the slewing ring gear can meaning in engineering application oftower crane.Finite element software ANSYS Workbench is a multipurpose computer designprogram of finite element method, is widely used in mechanical field, use it to work on thering gear contact analysis, modal analysis and fatigue analysis, and then conducted by thedata and the optimization design, to achieve the optimum design of gear ring, reduce damagein the process of gear ring work, improve the work performance of slewing mechanism.The main content of this topic research mainly use current the most powerfulthree-dimensional modeling software CATIA to slewing ring gear mechanism modeling indetail, then the model into finite element software ANSYS Workbench, the tower craneslewing ring gear tooth root bending statics analysis and tooth contact analysis, this paperstudies the working conditions of rotary gear ring, calculated the stress distribution of ringgear, in detail, such as mesh model method and the way is to make a careful comparison, it isconcluded that the tooth root bending analysis and stress-strain nephogram of tooth contactanalysis, the traditional tooth root bending strength and tooth surface contact strengthrespectively made a reference value. Subject also to the rotary gear ring structure modalanalysis, the main modes and frequencies is obtained, according to formation diagram analysis, proposed the slewing mechanism the upward trend of strain and strain, to avoid theresonance of slewing mechanism also has guiding significance.Finally, according to the ring gear tooth root bending strength of slewing ring gearoptimization design was carried out, in view of the slewing ring gear tooth root stress of thelargest, most likely damage situation, adopted a method for calculating optimal transitionfillet, obtained the best transition radius of slewing ring gear. By changing the size of thering gear dedendum circle transition radius, using ANSYS Workbench to analyze a set oftooth root transition fillet, determine the accuracy of the calculation method, get a bettertransition dedendum circle radius, so as to achieve optimization purposes.