【作者】 程林志；

【导师】 赵燕；

【作者基本信息】 武汉理工大学 ， 机械电子工程， 2006， 硕士

【摘要】 电动燃油泵是汽车用电脑控制的燃油控制系统的一个重要部件，市场需求大。本文在对短幅外摆线的基本原理分析的基础上，推导了内转子的齿廓曲线方程，为精确绘制和加工EFP431型电动燃油泵的内转子提供了理论依据。在此基础上，根据啮合原理，对EFP431型电动燃油泵的摆线齿轮泵的受力进行了详细的分析，并导出了摆线齿轮泵的强度计算公式，为优化模型的强度约束条件奠定了理论基础。 本文在对EFP431型电动燃油泵的工作原理和流量脉动分析的基础上，建立了EFP431型电动燃油泵的设计规范，并利用Matlab导出了EFP431型电动燃油泵的流量和脉动的精确的计算公式。然后对EFP431型电动燃油泵的摆线齿轮泵的内外转子进行了优化设计。建立了以“脉动量最小”为目标函数的优化模型，得出了摆线齿轮泵内外转子的优化结构。根据优化结果，利用Pro／E三维建模软件建立了EFP431型电动燃油泵的实体模型。 依据EFP431型电动燃油泵的试验要求，采用了计算流体力学Computational Fluid Dynamics(简称CFD)软件来检测试验所需要的技术数据和结果的方法。通过分析EFP431型电动燃油泵的结构，将EFP431型电动燃油泵分成了一级涡轮泵、二级齿轮泵、直流电机和出口三部分，分别建立了这三部分的内部流场模型，将建立的模型导入FLUENT的前处理软件gimbit中进行网格划分，设置边界类型和流体区域，然后导入FLUENT软件中进行分析，获得了试验所需要的技术数据和结果。 本文建立了EFP431型电动燃油泵的基础设计理论知识，并对泵的流场采用了一种全新的CFD分析方法，为EFP431型电动燃油泵的设计和更深层次的研究提供了一定的理论基础。更多还原

【Abstract】 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更多还原