The Design And Analysis Of Assembly-dissembly Equipment For Target Chamber Protective Layer

The assembly equipment comes from the “SG-III”,which is the national major scientific research project,for the target chamber radiation protection board(protective layer)disassembly operations.According to the special requirements that the protective layer is inlaid on the inner wall of the target chamber with high altitude,a set of special for protective layer assembly and disassembly operation were designed,which is consist of the lifting transportation equipment and disassembly equipment.The specific device structure design was introduced in detail,the dynamic and static simulation analysis,and the mechanical optimization design of the structure was accomplished.Firstly,according to the disassembly operation environment and functional requirements,the overall design was carried out.On this basis,the 3D model was established in CREO.The detailed structure design and calculation of each component was completed.Including telescopic boom of the lifting transportation equipment,luffing mechanism,chassis and hoist transport mechanism,the locking principle of locking mechanism,the size and driver design,the working space of six degree of freedom adjustment mechanism,demonstrating the feasibility of the method.In order to improve the safety and reliability of the equipment structure,static simulation analyses were carried out in the finite element analysis software Workbench,to obtain the stress and displacement of each member,Verifying the strength and stiffness of the equipment is in a reasonable range.And the results were analyzed,the intensity of the device in weak position of structure is improved.In addition,the modal analysis of the lifting transportation equipment in extreme conditions were carried out.Getting the first 6 order natural frequency and vibration mode,to make the equipment to avoid the resonance frequency effectively.Considering the influence of dynamic load on the disassembling equipment performance,the multi body dynamics of machine equipment need to be analyzed.With the help of ADAMS multi-body dynamics simulation software,rigid flexible coupling dynamics simulation model of the lifting transportation equipment was established.To analyze the kinematic and dynamic characteristics of vertical lifting arm,swing arm and telescopic arm under three working conditions.Verifying the equipment space accessibility and smooth movement.Contact analysis of locking mechanism of slider was carried out to solve the contact force and the driving force of the slider assembly.In the end,the optimization design of the key parts of the equipment was completed.The mathematical model of telescopic section size optimization was established to solve the optimum section size of telescopic arm under the condition of the strength and stiffness by using MATLAB optimization toolbox.The luffing mechanism dynamic performance optimization was also achieved.And optimization model is established in ADAMS to get the optimal parameters of swing arm movement stability.After optimization,the angular acceleration of the rear arm decreased,while the electric cylinder driving force has been greatly reduced.