Axial Force Balance Mechanism Design And Analysis Of Multistage Feed Pump

The multistage feed water pump is one of the important equipment of thermal power plant steam circulation system, and the axial force balance mechanism is an important component part of multistage feed water pump. designing and analysising the axial force balance mechanism on multistage feed water pump has the engineering background and practical value.This paper analyzes the cause of the multi-stage pump axial force and the factors that affect the axial force, introduced several main methods to calculate the axial force, compared the structural characteristics, working principle, advantages and disadvantages of several axial force balance mechanism. Based on fluid mechanics, fluid dynamics theory, This paper puts forward the calculation method and steps of the multistage centrifugal pump’s axial force, established the physical model of the double-balanced drum axial force balance device, deduced the relations, of the clearance leakage and inlet pressurethe and outlet pressure, proposed to reduce the amount of leakage balancing device geometric parameters to optimize the improved method, the calculated results show that the design of the method can effectively reduce the balancing device leakage.600MW supercritical boiler feed pump as a project instance of double-balanced drum structure of the axial force balance device design, the impeller and the double-balanced drum modeling, based on Solidworks software and Flow Simulation software on the impeller and the double-balanced drum the internal flow field and force a numerical simulation, the simulation results show that the CFD simulation results and theoretical design calculations are obtained to verify the correctness of the design calculations.