| Double-toothed roll crusher is very important in the field of mining machinery, itplays an important role in the country’s major mining. In this paper, by using the discreteelement method, we obtained the force of breaking tooth during Double-toothed rollcrusher normal operation, and analyzed the strength and stiffness of breaking tooth andtooth ring based on this force. In the normal production operation of double-toothed rollcrusher, non-broken things occasionally fell into the crusher in the process of crushing,which make the crusher can’t work normally, the breaking tooth and the tooth ring is easyto damage. Because replacing breaking tooth is easier than replacing tooth ring, we mustmake sure the tooth ring is safe as far as possible in case of non-broken things fall into thecrusher. It is of great significance in the design of crusher to study the strength andstiffness of breaking tooth and tooth ring in this case. In this paper, combined with theactual research of our research group, the double-toothed roll crusher has been studied,main contents and conclusions are as follows:1. Several kind of traditional crushers were compared. The background and researchsignificance of this paper were introduced. The research status of double-toothed rollcrusher and arrangement of breaking tooth were briefly introduced.2. To prepare for the study of strength and stiffness of breaking tooth and tooth ring,we mainly introduced the composition of double-toothed roll crusher, crushing mechanismof double-toothed roll crusher, the material and failure mode of breaking tooth and toothring.3. By using discrete element software, full load starting conditions of double-toothedroll crusher were simulated. According to the simulation results, we acquired the force ofbreaking tooth of full load starts and normal crushing, based on this force the strength andstiffness of breaking tooth and tooth ring were analyzed by using the finite elementanalysis software ANSYS Workbench.4. The multi-body dynamics model of double-toothed roll crusher was established byusing the software ADAMS, and the dynamic model was simulated. We verified theaccuracy of the model and got the maximum force data of breaking tooth. According to theforce data acquired from multi-body model simulation, the strength and stiffness of breaking tooth and tooth ring were analyzed by using the finite element analysis softwareANSYS Workbench, and the results were compared with the results of double-toothed rollcrusher working nomally.5. The finite element model of the breaking tooth and the finite element model of thetooth ring were respectively established by using the finite element analysis softwareANSYS. By studing the establishing methods of rigid-flexible coupling model in softwareADAMS, we respectively established the rigid-flexible coupling model that the breakingtooth was flexible body or the tooth ring was flexible body, and the two models weresimulated. According to the simulation results of rigid-flexible coupling model. Duringelectric bucket teeth collided with breaking tooth, the stress and displacement of thebreaking tooth and tooth ring were studied.According to the analysis results, the conclusions were as follows: The strength andstiffness of breaking tooth and tooth ring meet the requirements in normal conditions,breaking tooth and tooth ring will not be damaged. In the non-broken things falling into thedouble-toothed roll crusher cases, the breaking tooth were destroyed for the strength of thebreaking tooth is not enough, but the tooth ring were not damaged for the strength andstiffness of the tooth ring meet the requirements. Therefore, the breaking tooth and thetooth ring in this study are consistent with the design principle:’’when non-broken thingsfall into the double-toothed roll crusher, the breaking tooth can be damaged, but the toothring can’t be damaged.’’... |
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