航空圆弧齿轮泵多齿腔内流量脉动特性研究  

Flow pulsation characteristics in multi-tooth cavity of arc aero gear pump

作　　者：邢毅真 黎义斌[1,2] 张生福 井卫民 孟庆武 XING Yizhen;LI Yibin;ZHANG Shengfu;JING Weimin;MENG Qingwu(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Laboratory of Advanced Pumps,Valves and Fluid Control System of the Ministry of Education,Lanzhou University of Technology,Lanzhou 730050,China;Shandong Shijing Machinery Company Limited,Dezhou Shandong 250001,China)

机构地区：[1]兰州理工大学能源与动力工程学院,兰州730050 [2]兰州理工大学特种泵阀及流控系统教育部重点实验室,兰州730050 [3]山东世精机械有限公司,山东德州250001

出　　处：《航空动力学报》2025年第2期466-478,共13页Journal of Aerospace Power

基　　金：甘肃省教育厅产业支撑计划项目(2024CYZC-13);甘肃省教育厅高校科研创新平台重大培育项目(2024CXPT-09);甘肃省军民融合发展资金项目;甘肃省联合科研基金重大项目(24JRRA821)。

摘　　要：为研究齿轮齿数对燃油圆弧齿轮泵流量脉动特性的影响规律,利用RNG(re-normalization group)k-ε湍流模型对6~9齿的圆弧齿轮泵进行三维瞬态流场数值模拟,推导其瞬时流量的数学模型,揭示齿数对该泵流量特性的影响规律。结果表明:齿轮齿数对该齿轮泵性能有显著影响,以转速为2000 r/min、进出口压差为8 MPa工况为例,7齿、8齿、9齿泵的出口容积效率较6齿泵相比依次变化:+18.34%、+7.15%、+20.70%。随着齿轮齿数的增加,齿轮所受径向、轴向激励力脉动幅值显降低,7齿、8齿、9齿齿轮径向激励力均值较6齿齿轮相比依次变化:−19.84%、−26.77%、−29.82%,轴向激励力均值较6齿齿轮相比依次变化:−10.37%、−77.64%、−61.49%。通过小波变换对齿轮径向、轴向受力脉动频率进行分析,其脉动频率与齿轮啮合次数呈周期性相关。To explore the influence of the number of gear teeth on the performance parameters of the fuel arc gear pump,the three-dimensional transient flow field of the number of teeth for 6-to 9-tooth arc gear pumps was numerically simulated based on the RNG(re-normalization group)k-εturbulence model.The mathematical model of the instantaneous flow rate was derived,and the influence of the number of gear teeth on the flow performance of the gear pump was revealed.The results showed that the number of gear teeth had a significant impact on the performance of this pump.The outlet volumetric efficiency of the 7-tooth,8-tooth,and 9-tooth gear pumps was successively changed compared with the 6-tooth gear pump:+18.34%,+7.15%,+20.70%under 8 MPa,2000 r/min operating condition.The pulsation characteristics of the radial force and axial force of gears decreased significantly with the increase of the number of gear teeth.The mean value of the radial exciting force of the 7-tooth,8-tooth,and 9-tooth gear pumps was successively changed compared with the 6-tooth:−19.84%,−26.77%,−29.82%,and the mean value of axial exciting force changed compared with the 6-tooth:−10.37%,−77.64%,−61.49%.The radial force and axial force pulsation frequency of the gear meshing frequency was analyzed by the wavelet transform.

关 键 词：圆弧齿轮泵 齿轮齿数 流量特性 激励力 小波变换 

分 类 号：V219[航空宇航科学与技术—航空宇航推进理论与工程] TH325[机械工程—机械制造及自动化]