Theoretic Analysis And Experimental Study On Outer Moving Jaw Uniform Pendulum Crusher

A virtual prototype (VP) of the new model PD100120 Jaw Crusher has been studied in the thesis. The main results are as follows.Developed the Jaw crusher simplify mechanistic model. The Jaw Crusher mechanism has been theoretically analyzed. The traditional pivot four-bar mechanism is not able to reflect the fact that the link-bar length is slightly altering during the working-time. In order to reflect the characters of the simplified analysis model, gear wheel mechanism and line-contact surfaces mechanism have been brought forward.Compared the characteristic parameters of the track of the test-points between the actual track and the theoretical track, the line-contact surfaces mechanism is able to better reflect the actual model with a link-bar that altering in length. The dynamic analysis of the crusher is analyzed under the line-contact surfaces mechanism and the analysis can reduce the analytic error.The analysis of the Jaw Crusher emulating model. The Jaw Crusher emulating model has been built up with Software SE and VN. The emulating data only has a little different from the theoretical data; the reliability of the emulating model has been proved simultaneously.The analysis of load distribution model in Jaw Crusher Breaking Space. Firstly, some of the work parameter and the physical parameter have been analyzed, and these parameters should be improved so as to improve the efficiency of the machine. So that it is necessary to study the distributing load in the breaking space. Secondly, some facts which influence the distribution and the magnitude of the crash force have been theoretically analyzed. Based on the theoretic analysis, the finite element analysis (FEA) and the field experiments, the distributing load in the breaking space has been studied when the soft ore has been crushed by the machine. The research results have shown that the actual value of the distribution is smaller than the theoretical one; the ratio of them is 0.152, and the position of the composite force is at the 0.787 along the tooth length.The finite element analysis (FEA) of the machine's assembly. At first, the stress of the dynamic jaw has been acquired and compared under different force model. The result shows that the safety factor of the dynamic jaw reach 3.36 and the maximal stress of the assembly is much lower than the agreeable stress. Secondly, FEA of the support has been studied when the input force acquires via the traditional formula. The FEA results have shown that some regions of the inner plank and the elbow-seat have a higher stress and the other regions have lower. At the same time, increasing the thickness of the inner plank or the thickness of the rib would heighten the safety factor of the support. Finally, compared with the stress of the frame-support and the single plank-support, the single plank-support is able to meet the stress demands; reduce the material and save the cost of the machine immensely.