Research on structural optimization design for powder separator of large vertical mill based on Kriging model
Large vertical mill is a grinding system with complex structure,multiple operating parameters,multiple monitoring and operating points,and multiple physical fields,and its performance is directly related to the structure.Based on the parametric design method of NX secondary development,CFD-DPM(computational fluid dynamics-discrete phase model)of LGM large vertical mill was established.The grating structure of the powder separator was analyzed and designed,and the influence of the rotor blade structure on the performance of the mill was discussed.A structure optimization design method for powder separator based on Kriging model was proposed and verified on Isight platform.The results showed that the rotor torque and the velocity of the airflow between rotor blades could be effectively improved by appropriately reducing the waist length and head length of the rotor blades and increasing their thickness and inclination angle within the parameter design range.The torque was increased by 2.91%and the flow rate by 9.76%after optimization,which proved the effectiveness of the proposed method.The research results provide a new theoretical basis and practical guidance for the structural design and optimization of vertical mill,and have high scientific research reference value and industrial application prospect.
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