高压航空燃油齿轮泵的齿轮强度校核及应力仿真分析

以某型外啮合高压航空燃油齿轮泵为研究对象,推导齿轮理论强度校核计算公式及校核流程,对其齿轮进行强度校核;通过计算机CAD技术建立齿轮泵三维模型,基于ANSYS进行齿轮的动态啮合过程、静态接触应力、静态弯曲应力仿真;将3种仿真结果与理论校核结果进行对比,表明该仿真技术能够有效实现该型泵的应力仿真分析。应力分布结果表明:齿轮动态啮合过程中,最大应力发生在中心距中点位置和啮合线末端,且通过对2个位置的静态接触应力和弯曲应力仿真获取相应的齿面接触应力和齿根弯曲应力的啮合性能参数,再次验证齿轮的受力规律,对新一代航空发动机主供油泵的设计及仿真研究具有一定的工程实践意义。

Strength Check and Stress Simulation for the Gear of a High-pressure Aero-fuel Gear Pump

The gear strength check and stress simulation are carried out for a certain type of high-pressure aero-fuel gear pump, and the dynamic meshing process and static stress distribution characteristics of the gear are studied. First, the theoretical strength check calculation formula of the gear are derived and calculated. Then, the 3-D model of the pump is established through the CAD. The dynamic meshing process, static contact stress and static bending stress are simulated by using the Ansys. Finally, by comparing the simulation results with theoretical results, it can be seen that the simulation method can effectively realize the stress simulation of this pump by the acceptable errors. Meanwhile, the stress distribution results show that the maximum stress position occurs at the midpoint of the center distance and the end position of the meshing line during the meshing process. And the corresponding tooth surface contact stress is obtained by the static contact stress and bending stress simulations. Furthermore, the stress law is verified by the obtained parameters from the simulations. The conclusions have certain engineering practical significance for the design and simulation for the main-fuel pump for advanced aero-engine.