Pc5282 Jaw Crusher Design And Dynamic Jaw And Frame Finite Element Optimization Analysis

Through comprehensive utilization of computer hardware and software system, combination with the modern design technology and experience design method, application of mechanical design knowledge and the material mechanics theory, the fallowing research of the PC5282jaw crusher had been accomplished.(1) Basing on the structure of domestic jaw crusher and referring to relative merits of foreign advanced crushers, reasonable structure scheme of elements were designed after schemes’ contrast. With geometry analysis to the planar mechanism of the jaw crusher, movement expression of the movable jaw was established. By C#, Programs on the movement expression was writed and trip data of the movable jaw in different schemes were calculated out, the final scheme was chosed after the comparison of all schemes. Based on the Solidworks software, three-dimensional entity design, engineering drawing of all the elements and assembly were accomplished. According to the specific situation of bearing force and the models established, check calculation of the main elements were done, Strength performance of the elements checked was proved to be good enough.(2) Static finite element analysis of the movable jaw and the back frame was accomplished in COSMOSWORKS software. In finite element analysis of the movable jaw, the location supporting toggle plate had stress concentration and a larger deformation. The maximum stress was93.98Mpa, much less than the yield limit of material248MPa. The Lowest end had the maximal displacement with value0.1367mm, the maximal displacement and deformation didn’t cause much influence to the work performance of the movable jaw. Results in finite element analysis proved that the movable jaw had enough strength. In finite element analysis of the back frame, stress concentration and deformation concentration appeared in the edges of bolt orifices of the side walls. The maximum stress was209.6MPa, still less than the yield limit of material248MPa, the maximum deformation was0.6509mm. The largest displacement appeared in the middle part of the back frame with the maximum value of0.2498mm. But in overall, the maximal displacement and deformation wouldn’t be influence to the work performance of the back frame.(3) By the optimization function of COSMOSWORKS, according to model structure and complexity of the movable jaw and the back frame, different number size parameters of the models were extracted as the design variables. According to element casting requirements, reasonable optimized scopes of the design variables were set. The maximum stress in the finite element analysis was set to be the constraint condition. The smallest volume was set as the optimized object. Then optimization analysis to lose weight and optimize structure was established and accomplished. After optimization of the movable jaw, thicknesses of all the stiffened plates got thinned, positions of all the stiffened plates were also changed. The maximum stress was92.428Mpa, the maximal displacement was0.1453mm, a little lager than before. Distribution rules of the stress and displacement were similar to the original distribution rules. But the volume was reduced from0.24419m3to0.2282m3, losing weight by6.5%. After optimization of the back frame, Distribution rules of the stress and displacement were similar to the original distribution rules. The maximum stress was219.8Mpa, the maximal displacement was0.3177mm, also a little lager than original value. But volume of the back frame was reduced from0.080017m3to0.027027m3, losing weight nearly by10%, optimization effect in losing weight was more obvious.