Basic Design Theory Research Of Electric Fuel Pump For EFP431 Type

Electric fuel pump is the important unit in fuel control system which is controlled by computer, which is in the hare demand. On the basis of the analysis of the basic principle of short amplitude epicycloids, the paper has inferred the tooth profile curve equation of inner rotor, which provides the theory basis for drawing and manufacturing precisely inner rotor of electric fuel pump for EFP431 type. On the basis of above, the pressure of cycloid gear pump for electric fuel pump for EFP431 type has been discussed in detail according to mesh principle and the strength computation formula has been inferred, which lay the theory basic for strength constraint of optimum model.On the basis of analysis of the principle of work and flux fluctuation of electric fuel pump of EFP431 type, the paper has built design specification of electric fuel pump for EFP431 type. Moreover, precise computation formula for the flux and fluctuation of electric fuel pump for EFP431 type has been inferred. On the basis of above, the inner and outer rotor of cycloid gear pump for electric fuel pump for EFP431 type has carried on optimum design. The paper has built the optimum model as objective function of the smallest fluctuation and obtained the optimum structure of inner and outer rotor of cycloid gear pump. According to optimum results, the paper has built the solid model of electric fuel pump for EFP431 type by Pro/E soft.According to experiment demand of electric fuel pump of EFP431 type, the paper has adopted CFD soft to obtain the technical data and result. According to assay the structure of electric fuel pump of EFP431 type, the electric fuel pump for EFP431 type has been divided into three parts as the turbine pump, the gear pump, the direct current motor and outer. The paper has built separately these three parts of internal flow field model, which was inputted gambit soft to mark off the grid, set the boundary condition and flow field. Then, the file of gambit has been carried on analysis by fluent soft and obtained the technical data and result. The every data can be obtained quickly though anlysis and computation in CFD software on the...