| Crane is a kind of important mechanical equipment,which is used for goods loading and unloading,stacking and so on.It is widely used in all walks of life in our country.Most of them are used in the general fields and could not meet the needs of the use in some special occasions.According to the questions proposed by the company that the electrode rod is will be continuously consumed when passed low voltage and high current with it in melting process,caused the rod become shorter,and the contact quality between the end of rod and mineral will be poor,when the mineral is not uniformly heated.It has serious impact on smelting manganese procedure.Because this equipment is working in the high temperature environment during the smelting process.It is necessary to design a crane to adjust the electrode position that is simply and easy to operate at any time.According to the existing equipment layout in the enterprise,select the appropriate structural design scheme.As the main transmission mechanism,screw and gear with worm are preliminary designed and checked.Establish the basic models by Pro/E.Due to the existing the interference when assembling the gear and worm in traditional means.Choose building the precise model of gear and worm in KISSSOFT,and finally completed the two model preliminary assembly in Pro/E.Importing the rigid body models to ADAMS,and define the material properties,the corresponding pairs and restrains.Through the modal analysis of the screw in the ABAQUS,the natural frequency and the deformation of screw vibration are obtained.The results output the flexible body modal neutral file(MNF).Loading the MNF file to ADAMS,the dynamic simulation analysis will begin after finished the rigid flexible body replacement.This results including the rotational speed,displacement,stress and strain.Considering the temperature load effects in gear and worm transmission.Taking the thermal coupling analysis in ANSYS Workbench software,and obtained the stress and strain distribution of gear when they are engaging transmission.In this paper,through the analysis of rigid flexible coupling dynamics of the screw,verify the conclusion that flexible screw is get more in line with the actual transmission conditions.The distribution of stress and strain on the screw shows that the upper and lower ends of it are risk interface regions.Through the thermal mechanical coupling analysis of gear and worm,the results shows that the stress and strain of the gear are concentrated in the starting and stopping period of the meshing cycle.The temperature load has certain influence on gear and worm engaging transmission.The whole structure has meets the anticipative demands and the corporate use conditions and acquired perfect practical value. |
