Research On Axial Force Balance Of Multistage Forest Fire Extinguishing Centrifugal Pump

Multistage centrifugal pump has huge axial force during running, thrust bearings can not assure the pump working stably and reliable, reduce pump's working life. Recently, it mainly adopts balance device to balance the axial force, such as balanced hole,double suction,symmetrical impellers,back vane,balancing drum,balance disc and so on.The paper focus on solving this axial force problem,analyze and calculate the axial force,then design balance device. Study the influences that balance parameters to leakage. Come up with corresponding mathematical model and constraint condition. Use MATLAB to optimize and compute, compare with traditional methods. It utilizes the FLUENT of CFD software to analyze the pressure distribution and liquid flow in the balancing device, visualize and analyze the results. Improve understanding of the fluencies that balance gap to leakage and balance device's property. Make this device on BJL5 type multistage centrifugal pump to balance its axial force. This will minish the leakage of the centrifugal pump and improve the efficiency of the pump, with positive guidance to the research and optimization of the pump, to improve the overall performance of the pump and have some reference value for further study on mechanism of the pump.