微型涡喷发动机齿轮泵流场分析与结构优化  

Flow Field Analysis and Structure Optimization of Gear Pump for Micro Turbojet Engine

作　　者：谭帅极 冯治国[1] 何林[1] 赵磊 TAN Shuaiji;FENG Zhiguo;HE Lin;ZHAO Lei(School of Mechanical Engineering,Guizhou University,Guizhou Guiyang 550025,China;Guizhou Kaiminbo Mechanical&Electric Technology Co.,Ltd.,Guizhou Guiyang 550009,China)

机构地区：[1]贵州大学机械工程学院,贵州贵阳550025 [2]贵州凯敏博机电科技有限公司,贵州贵阳550009

出　　处：《机械设计与制造》2025年第4期12-16,共5页Machinery Design & Manufacture

基　　金：贵州省科技支撑计划项目(黔科合支撑[2021]一般280)。

摘　　要：针对某微型涡喷发动机的燃油齿轮泵齿轮磨损严重问题,优化设计了外啮合齿轮泵结构,建立了涡喷发动机齿轮泵内部流场的CFD模型,利用Fluent计算齿轮泵的内部流场特性,分析齿轮泵内部流场的压力、速度分布,使用流固耦合方法研究了齿轮泵的变形。结果表明:优化设计后的齿轮泵最大静压发生在排油腔啮合处,最大静压小于未优化设计齿轮泵的最大静压。有效降低了齿轮泵轮齿受到的压力;优化设计后的齿轮泵径向变形程度小于未优化设计的齿轮泵径向变形,有效降低了齿轮泵轮齿变形程度;优化设计后的齿轮泵流速与未优化设计的齿轮泵流速基本相同,对控制精度没有影响。According to the serious gear wear problem of the fuel gear pump of a micro turbojet engine,the external gear pump structure was optimized and the CFD model of the internal flow field of the turbojet engine gear pump was established.Fluent was used to calculate the internal flow field characteristics of the gear pump and analyze the pressure and velocity distribution of the internal flow field of the gear pump are studied using the fluid-solid coupling method to study the deformation of the gear pump.The results show that the maximum static pressure of the optimally designed gear pump occurs at the meshing position of the oil discharge chamber,and the maximum static pressure is less than the maximum static pressure of the unoptimized designed gear pump.Effectively reduce the pressure on the gear teeth of the gear pump;the radial deformation of the gear pump after the opti⁃mized design is less than that of the gear pump without the optimized design,which effectively reduces the deformation of the gear pump teeth;the flow rate of the gear pump after the optimized design is the flow rate of unoptimized gear pumps is basically the same,which has no effect on the control accuracy.

关 键 词：齿轮泵磨损 结构优化 CFD模型 流固耦合 

分 类 号：TH16[机械工程—机械制造及自动化] TH325