Design And Performance Analysis Of The Sealing Device In The Head-tail And Side Position Of The Sintering Machine

As the excessive emission of carbon oxides has caused global warming and other problems,China has set a target of achieving the peak of carbon emissions by 2030.The iron and steel industry is a typical resource-based industry with high emission and energy consumption.In recent years,it is facing huge pressure of energy conservation and emission reduction.The belt sintering machine is one of the important equipment in the steel industry.Among them,the air leakage phenomenon is the most serious at the head,tail and side of the sinter,which directly affects the output and quality of the sinter.Therefore,in this paper,the air leakage problem at the head,tail and side of the sintering machine is studied as follows:Firstly,the main components of the head and tail sealing device and the side sealing device of the belt sintering machine are put forward,and the friction of the contact surface of the sealing device and the influence of high temperature on the sealing device are analyzed.Through discussing and analyzing the labyrinth sealing principle used in the sealing device,the sealing device designed based on the principle can effectively reduce the air leakage rate.Secondly,the fluid simulation model of the sealing device is constructed,the key structure of the sealing device is simulated and analyzed and the parameters are optimized by using the control variable method,and the corresponding simulation results of different sizes are listed.From the Angle of inlet pressure,inlet velocity,internal section pressure and velocity,the horizontal and vertical comparative analysis is made.The influence of important dimension parameters of several sealing structures on the sealing performance of the sealing device is obtained,and the final value of the key dimension parameters of the sealing device is determined.Finally,the three-dimensional simulation model of the buffer device is constructed and the unidirectional fluid-thermal-solid coupling simulation is carried out,and the temperature distribution and deformation nephogram inside the buffer device are obtained.Through simulation analysis,it is concluded that there is no serious thermal deformation of buffer device under high temperature,and high temperature does not affect its performance.In addition,the curve fitting and integration tools were used to calculate the air leakage rate of the two sealing devices at the entrance by curve fitting and integrating the velocity values collected at the entrance.