轴向柱塞泵流量脉动成因及成分数值仿真分析  

Numerical Simulation Analysis of Causes and Components of Flow Pulsation in Axial Piston Pumps

作　　者：汪文涛 潮群 林泽宇 刘成良[1,2] WANG Wentao;CHAO Qun;LIN Zeyu;LIU Chengliang(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240;State Key Laboratory of Mechanical System and Vibration,Shanghai Jiao Tong University,Shanghai 200240;COMAC Shanghai Aircraft Design and Research Institute,Shanghai 201210)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]上海交通大学机械系统与振动全国重点实验室,上海200240 [3]中国商飞上海飞机设计研究院,上海201210

出　　处：《液压与气动》2025年第2期17-24,共8页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(52475064);上海商用飞机系统工程联合研究基金(CASEF-2023-AM11)。

摘　　要：流量脉动是轴向柱塞泵输出油液时的固有属性,其诱发的压力脉动直接影响柱塞泵及整个液压系统的工作品质和服役寿命。为阐明轴向柱塞泵流量脉动成因和成分,建立了轴向柱塞泵三维瞬态CFD仿真模型,搭建了轴向柱塞泵出口压力脉动测试平台,验证了仿真模型的有效性。通过调整仿真模型的几何结构参数,解耦出柱塞泵流量脉动中的几何脉动、倒灌脉动、泄漏脉动和死区脉动分量,仿真分析了不同工况下各脉动分量对柱塞泵总流量脉动的幅值贡献率。结果表明,几何脉动和倒灌脉动加剧出口流量脉动,而死区脉动和泄漏脉动抑制出口流量脉动。在出口压力10 MPa和转速1000 r/min工况下,几何脉动和倒灌脉动对出口流量脉动的贡献率分别为9%和214%,死区脉动和泄漏脉动对出口流量脉动的贡献率分别为-35%和-88%。研究结果为轴向柱塞泵出口流量脉动的形成机理及抑制方法提供了重要理论依据。Flow pulsation is an inherent property of the delivery oil of axial piston pumps.The pressure pulsation induced by flow pulsation affects the working quality and service life of axial piston pumps and even the entire hydraulic system.To clarify the causes and components of flow pulsation,a three-dimensional transient CFD model of an axial piston pump is established,a test platform for pressure pulsation at the outlet of an axial piston pump is built to verify the numerical model experimentally.In addition,the pressure pulsation components due to geometric pulsation,backflow pulsation,leakage pulsation and dead zone pulsation are obtained by adjusting the geometrical structure parameters of the simulation model.The verified simulation model is employed to analyze the amplitude contributions of each flow pulsation component under different operating conditions.The simulation results indicate that geometric pulsation and backflow pulsation have positive contributions to the flow pulsation,while leakage pulsation and dead zone pulsation have negative contributions to the flow pulsation.The geometric pulsation,backflow pulsation,dead zone pulsation,and leakage pulsation account for 9%,214%,-35%and-88%,respectively,of the total delivery flow pulsation at a discharge pressure of 10 MPa and a rotational speed of 1000 r/min.The research results provide an important theoretical basis for the formation mechanism and suppression methods of the delivery flow pulsation in axial piston pumps.

关 键 词：轴向柱塞泵 流量脉动 CFD仿真 

分 类 号：TH137[机械工程—机械制造及自动化] TH322