一种多级内啮合航空齿轮泵设计与仿真

Design and Simulation of Aeroengine Multi Internal Gear Pump

给出了一种采用一字形燃油通道结构方式的串联多级内啮合齿轮泵的设计方法,首先进行了多级内啮合摆线齿轮泵的总体结构设计;其次基于泛摆线形成原理和内转子摆线齿形曲线参数方程,利用UG三维建模软件完成内转子参数化建模;最后通过ANSYS数值模拟对内外转子间接触应力进行了数值计算分析,并与赫兹接触理论对内外转子接触应力计算结果进行了对比。结果表明:ANSYS采用静态分析结果与赫兹理论计算的最大应力结果接近,赫兹理论计算采用的是旋转一周不同位置得到的最大应力,因此理论值偏小,但两者计算最大结果均小于合金钢许用应力,表明泵的设计强度满足要求。

One shaped fuel channel structure was used to design a series of multi- level internal gear pump. First,the overall structure of the multi- level internal meshing gear pump was designed. Secondly,based on the principle of the pan- form and the parameter equation of the inner rotor of the inner rotor,the parametric modeling of the rotor was accomplished by using the UG 3D modeling software. In the end,the contact stress between the inner and outer rotor was calculated by ANSYS numerical simulation.The results were compared with the theory of Hertz contact. The results showed that the maximum stress results of ANSYS were close to that of the Hertz theory. Because the Hertz theory was using rotation to get maximum stress in different position,the theoretical value was smaller. The two calculated results were less than that of the alloy steel allowable stress,which indicates that the strength of the pump meets the requirements.