| Clay gun is one of the most important equipments in blast furnace.Its role is to block the tapping hole quikly and precisely after iron slag coming out of the tapping hole and make sure the blast furnace can run into the next smelting cycle.If the clay gun is out of order and the tapping hole can not be bloched,it will cause the blast being shutted down or even serious accidents.So the service life of the clay gun is directly related to the safety and economic performance of a factory.The related analysis theory of mechanical principle is used to do kinematics analysis of the hydraulic clay-gun’s linkage mechanism,and get the velocity and acceleration curve of the key points in the working process of the hydraulic clay gun.Through the relevant data of the motion curve and using experience,three positons of hydraulic cylinder are chosen to do finite element analysis.The pistons are at 0 meter,0.7 meter,1.2meter respectively.Solidworks software is used to establish the models of hydraulic clay-gun’s components and assemble them together.After inporting models into ANSYS Workbench,materials of models is set.Transient structural module is used to carry on the motion simulation of key components of the hydraulic clay gun in three typical positions,and get stress distribution image during the impact process.Result shows that the impact force loaded on hydraulic cylinder piston causes maximum stress in three-link rod is far beyond the yield strength of using material when the piston is at 1.2 meter;the two-link rod maximum stress is close to the yield strength of using material when the piston is at 0.7 meter.In order to improve reliability of the mechanism,it’s necessary to improve the two-link rod and three-link rod from changing materials and structure.The improved linkage mechanism is verified by reloading the same impact force at each position,and result shows that the improved linkage mechanism can meet the strength requirements during the impact process. |
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