| Hoisting machinery including many types,including crawler crane in coal mining,water and electricity construction,municipal landscaping and transportation and other industries widely used.Along with the level of research and development,and infrastructure construction scale is more and more big,the crawler crane is toward lightweight and large-scale development.Among them,the change of contact stress between the support wheel and the track plate in the crawler walking device not only affects the reliability of the structure,but also relates to the performance and safety of the whole machine.The variable load and excessive load may cause damage to the wheel plate structure and lead to structural failure,which puts forward higher requirements for the bearing capacity and service life of the support wheeler-crawler plate structure.In this paper,based on the structure of the crawler crane in Solid Works 3D software to establish the model of the whole machine,through the ADAMS simulation software data interface to import it,complete the virtual prototype model of the whole machine.Based on the dynamic simulation analysis of crawler crane under normal working conditions,the load variation curve of crawler crane’s support wheel is obtained,which provides data support for the finite element analysis and optimization of support wheel-crawler plate contact structure.Hertz contact theory and elastoplastic theory are used to analyze the contact stress of the supporting wheel and crawler plate in the elastic and elastoplastic stages respectively.The finite element method is more consistent with the actual contact state than the Hertz theory method.The finite element elastoplastic analysis of the support wheel and the crawler plate shows that the material of the support wheel has reached the yield limit,and the material of the support wheel and the crawler plate has good bearing capacity.Based on the optimization module of ANSYS Workbench finite element software,the structural parameters of the support wheel were optimized,the contact stress between the support wheel and the track plate was improved,and the weight of the support wheel was also reduced.At present,there are few studies on the contact analysis of crawler crane’s support wheel and crawler plate structure.In this paper,the contact analysis of crawler crane’s support wheel and crawler plate structure is carried out,and the optimization method based on improving the contact state of the support wheel and crawler plate is proposed,which has a certain significance for the improvement of the operation performance of the whole machine.At the same time,the damage caused by contact between the support wheel and the crawler plate structure can be reduced to a certain extent,which provides reference and basis for the design and research of the support wheeler-crawler plate structure,and lays a foundation for the further development of crawler crane technology. |
