Optimization Design Research Of Mine Submersible Pump Impeller Based On CFD Technology And Orthogonal Test Method

Coal is an important resource for China’s socialist modernization and the necessities of the people’s daily life, Coal industry is the basic industry in our country. More than 90% of coal mine in our country are underground mining, the mining process would be seriously threatened by the water damage. Mine submersible pumps, because with advantages of a low cost, easy to install, low noise operation Etc., have been widely used in coal mine production.Currently, most mining submersible pumps are in accordance with the approach of Clean Water Pump to the design and manufacture, but in the actual drainage process, its transport medium is generally two-phase fluid containing solid particles. With a water pump to transport medium with solid particles, it will appears low efficiency, flow components wear serious, life is short and other issues. The impeller is worn the most serious parts in pump, especially the blade abrasion of working face, will seriously affect the performance of the pump. Mine submersible pumps still have this problem: when it is large flow operation, easy to overload and burning motor, this reduce the reliability of the pump. If increase the power standby coefficient, use oversized matching motor, Will result in investment cost increase, volume and weight of motor increase, serious waste of energy and so on.According to the problem of mine submersible pump, This article first use FLUENT software to numerical simulation a certain type Mine submersible pumps and predict pump performance. Then follow the solid-liquid two-phase theory, no overload principle to designed and calculate the impeller hydraulic parameters. But the values of blade outlet placement angleβ2, blade wrap angleθ, vane inlet angleβ1, impeller inlet diameter D1, number of blades Z are interval variables, This paper uses the orthogonal experimental design method to analyze above parameters affect the performance of submersible pump, find the best combination of the above parameters, in order to achieve the purpose of optimized design. Then manufacturing impeller follow the optimal solution obtained by orthogonal analysis, and load within Mine submersible pumps performance test, The impeller optimization model Makes submersible pumps rated point power reaches 56.57%(higher than the efficiency value stipulated by the state 51%). Finally, use ANSYS software to analyze stress and deformation of impeller in the actual operating conditions, the analysis results provide a theoretical basis for the modification of the impeller.