Research On Impellers And Guide Vanes Of Stamping Centrifugal Pump Hydraulic Components

There are many advantages for stamping and welding centrifugal pump.Flow smooth,clean environment,the manufacturing process saving time and material,the hydraulic pump is superior to casting and long service life,easy maintenance replacement etc..So it has become the main direction of future development of the pump.Stamping pump efficiency technical indicators is often higher than the national standard and casting pump efficiency technical indicators is often lower than the national standard.This paper selected LDP32-4-8-type punch pump for the study.Using method of CFD numerical simulation,comparative studies related of stamping pump and casting pump efficiency specifications.At the same time,theoretical analysis and experimental study the relationship between the structureh and the head and the efficiency.The main work and results are as follows:1.Firstly,the LDP32-4-8 stamping multistage pump prototype was carried on the numerical calculation,the internal flow field and performance was analyzed,and the results verified the accuracy of the numerical calculation;2.Influence of flow state inside pump and external characteristic with different schemes of the gap between impeller blades and plates were studied,and it had got some related conclusions,the bigger gap is bad;3.Influence of flow state inside pump and external characteristic with different schemes of area ratio between guide vane import and impeller exports were studied,and it had got some related conclusions,the head and efficiency of pump are improved with the increase of area ratio;4.Influence of flow state inside pump and external characteristic with different schemes of outlet angle of guide vanes were studied,and it had got some related conclusions,the best range of guide vanes outlet angle is 90 ° ~ 95 °;5.Influence of flow state inside pump and external characteristic with different numbers of guide vane were studied,and it had got some related conclusions,within a certain range,guide vanes’ s number is the more the better;6.Cooperation with enterprises manufacturing prototypes.Studied part of the program on test platform in the enterprise.The results show,test data in the head generally slightly higher than the simulation results;but the efficiency slightly lower than the simulation results,However,the trend are consistent with simulation results.Prove the reliability of simulation results.