航空燃油齿轮泵运行状态分析方法OA

Aviation fuel gear pumps suffer from severe wear of floating bushings under high-speed operation due to uneven dynamic loads.Moreover,the micro-motion of the floating bushings affects end-face leakage of fuel gear pumps,which further affects the outlet pressure and flow rate.To address this issue,a lumped parameter model is proposed to simulate the pressure distribution in the internal flow field of gear pumps.According to the operating characteristics of fuel gear pumps,a lumped parameter mathematical model is established.Simulations are carried out using the co-simulation platform of MATLAB+AMESim.The results show that the simulation results agree well with actual working conditions,and the computational efficiency of the internal flow field solution is significantly improved.The proposed method can effectively reflect the influence of gear leakage caused by floating bushing micro-motion on the internal flow field pressure.Compared with most existing simulation methods based on preset constant end clearances and complex 3D discrete solutions using Navier-Stokes equations,it has obvious advantages in practicality and efficiency and provides a more efficient and accurate technical approach for the performance research and optimization of aviation-fuel gear pumps.