Design And Study Of High-efficiency Hydraulic Components Of 50MP160 Centrifugal Pump

Centrifugal pump is a common fluid machinery which has been widely applied in many industries and our daily life,the power consumption of various pumps is considerably large and increased year by year.However,the hydraulic efficiency of centrifugal pump in our country is generally lower than the international level and the energy saving potential is enormous.So the centrifugal pump design technology in China remains to be further ascension.In recent years,CFD technology and optimization designing method have been widely applied in the centrifugal pump design,it can effectively simulate flow and improve the performance of centrifugal pump.This paper has adopted the design method based on the theoretical calculation,numerical simulation and experiment validate,designed the high-efficiency hydraulic components of 50MP160 single-stage single-suction clean water centrifugal pump,and the main geometric parameters of impeller has been studied,the main research contents and results are as follows:1)The pump industry development situation at home and abroad was reviewed in detail,and the performance difference of single-stage single-suction clean water centrifugal pump was found.It's found that domestic efficiency performance index are significantly lower than the foreign technical level,an average of less is 3.35%,and it did not meet the national standards specified value.2)The losses within the centrifugal pump was analyzed in detail,It's found to improve the efficiency of the pump,the disk friction losses in the design should be reduced as far as possible.Combining the application status of CFD technology in centrifugal pump industry in recent years,the design method combining the theoretical calculation,numerical simulation and experimental validation has been set out.3)The hydraulic design of 50MP160 centrifugal pump was designed and calculated with speed coefficient method,and the wooden pattern diagrams of impeller and volume were drew,providing for Pro\E 3D modeling.4)Using commercial software Pro\E to make up the 3D model of impeller,volute and pipes,and discretized computational fluid domain model by the ICEM software,adopted ANSYS CFX software to solve it.Eventually,static pressure distribution and velocity vector distribution inside the pump calculation were analyzed,the calculation results was consistent with the actual.5)Through CFD numerical simulation method,the main geometric parameters of impeller ?2,b2 and z was studied,the results showed that pump lift H showed a trend of increase and the efficiency ? showed a trend of decrease along with the increasing of settling angle ?2;pump lift H increased and efficiency ? decreased along with the increasing of impeller outlet width b2,however the lift performance curve would occur with a hump when impeller outlet width b2 was too large;lift increased gradually along with the increasing of the number of blades z,efficiency also showed a trend of increase,but efficiency increase amplitude obviously decreased with too many blades,and if the number of blades z continued to increase,the increasing of centrifugal pump lift and efficiency would be more and more not obvious,evenly would occur a downward trend.6)Reasonably distributed the main impeller geometric parameters for optimization design,the optimization design model was simulated the hydraulic performance again;hydraulic elements intensity of model pump was checked;finally prototype test was developed,the result showed that test performance curve and simulation performance curve fitted well,the maximum error was less than 3%,the hydraulic performance of design model was very efficient,?=63.0%,according to the domestic leading level.