齿轮泵泄漏计算、卸荷槽优化和性能测试的实验研究  

Experimentel study on leakage calculation, unloading groove optimization and performance test of gear pump

作　　者：杜浩强 张永强 顾广溪 王科心 李南骏 孙嘉祺 DU Haoqiang;ZHANG Yongqiang;GU Guangxi;WANG Kexin;LI Nanjun;SUN Jiaqi(Xinxiang Aviation Industry(Group)Co.,Ltd.,Xinxiang 453000,China;Key Laboratory of Fluid Power and Mechatronic Systems,Zhejiang University,Hangzhou 310030,China)

机构地区：[1]新乡航空工业(集团)有限公司,河南新乡453000 [2]浙江大学流体动力基础件与机电系统全国重点实验室,浙江杭州310030

出　　处：《机电工程》2024年第10期1914-1922,共9页Journal of Mechanical & Electrical Engineering

基　　金：新乡航空工业(集团)有限公司预研项目(XH103-BFWB-2022-02)。

摘　　要：针对高速齿轮泵的泄漏和困油这两个影响泵性能的问题,为减少高速齿轮泵的泄漏量和困油压力,提出了一种理论、仿真和实验相结合的泄漏计算和卸荷槽设计方法。首先,建立了考虑间隙和泄漏的航空用高速齿轮泵的液压模型,推导了齿顶泄漏、侧向泄漏和啮合泄漏的计算公式;然后,给出了卸荷槽设计公式,优化了两卸荷槽间距,确定了卸荷槽的长度及深度和位置,并提出了一种改进形状卸荷槽;之后,利用Pumplinx软件得出了齿轮泵的内部流体域瞬时分布结果,对比了有卸荷槽流体域与无卸荷槽流体域,直观观察了困油现象,并详细比较了四种卸荷槽对应流体域产生的最大困油压力;最后,对航空用高速齿轮泵进行了实验测试。研究结果表明:实验测试的流量与所建立的仿真模型流量具有一致性,平均误差在10%以内,验证了计算公式和泄漏分析的准确性。该研究对工厂齿轮泵优化设计和生产具有重要的指导意义。Aiming at the leakage and trapped oil problems that mainly affected the performance of high-speed gear pump,in order to reduce the leakage and trapped oil pressure of high-speed gear pump,a leakage calculation and unloading groove design method combining theory,simulation and experiment was proposed.Firstly,the hydraulic model of high-speed gear pump for aviation considering clearance and leakage was established,and the calculation formulas of tip leakage,lateral leakage and meshing leakage were derived.Secondly,the design formulas of the unloading groove were given,the distance between the two unloading grooves was optimized,the length,depth and position of the unloading groove were determined,and an improved shape unloading groove was proposed.Then,the Pumplinx software was used,and the instantaneous distribution results of the internal fluid domain of the gear pump were obtained.The fluid domains with unloading groove were compared with the fluid domain without unloading groove,so that the phenomenon of trapped oil was observed intuitively.The maximum trapped oil pressure generated by the fluid domain corresponding to the four unloading grooves was compared in details.Finally,the experiments were conducted on a specific high-speed gear pumps for aviation.The experimental results show that the flow rate of the experiments is consistent with the flow rate of the established simulation model,with an average error of less than 10%,it verifies that the calculation formula and leakage analysis are correct.The research is of great significance to the design optimization and production guidance of the gear pump in the factory.

关 键 词：外啮合齿轮泵 泄漏模型 流体仿真 卸荷槽 结构优化 困油现象 

分 类 号：TH325[机械工程—机械制造及自动化] V231.9[航空宇航科学与技术—航空宇航推进理论与工程]