基于一维计算模型的斜盘式柱塞泵流动特性分析  

Flow Characteristics Analysis of Swash Plate Piston Pump Based on One-Dimensional Computational Model

作　　者：朱志鹏 汤永[1] 孙云伟[1] 杨广根[1] 巴德纯[2] ZHU Zhipeng;TANG Yong;SUN Yunwei;YANG Guanggen;BA Dechun(China Helicopter Research and Development Institute,Jingdezhen 333001,Jiangxi,China;School of Mechanical Engineering&Automation,Northeastern University,Shenyang 110001,Liaoning,China)

机构地区：[1]中国直升机设计研究所,江西景德镇333001 [2]东北大学机械工程与自动化学院,辽宁沈阳110001

出　　处：《华南理工大学学报（自然科学版）》2024年第2期62-73,共12页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家重点研发计划重大科学仪器设备开发专项(2016YFF0104000);航空科学基金资助项目(201957002005)。

摘　　要：斜盘式柱塞泵广泛应用在直升机疲劳试验的液压系统中,其流动特性对液压系统稳定性有着至关重要的作用。文中使用立体几何方法分析了斜盘式柱塞泵柱塞运动轨迹,基于图形解析法推导了过流面积公式,并编写相应Matlab程序实现吸排油过流面积自动化计算;构建了考虑流量倒灌及泄漏的单柱塞流动模型,结合AMESim软件实现柱塞泵三维计算模型向一维计算模型的转变;依据初始工况计算结果分析了柱塞泵的流动特性及其产生流量脉动的原因,并使用基于计算流体力学(CFD)方法的三维模型所获得的流量脉动计算结果验证了一维计算模型的准确性。在此基础上分析了不同运行工况(包含运行温度、工作压力及柱塞泵调节参数)对出口流量脉动率的影响,从降低流量脉动率进而提高直升机疲劳试验精度的角度分析了试验中柱塞泵调节控制要点。文中提出的一维计算模型可显著提高柱塞泵仿真计算速率,便于后续柱塞泵的改进设计以及将其作为子系统添加到虚拟数字试验平台中。The swash plate piston pump is widely used in the hydraulic system of helicopter fatigue test,because its flow characteristics are critical to the stability of the hydraulic system.This paper used the three-dimensional geometric method to analyze the movement track of the plunger in the swash plate piston pump,and derived the formula of the overflow area based on the graphic analysis method.The corresponding Matlab program was compiled to realize the automatic calculation of the overflow area of oil suction and drainage stage.It constructed a single piston flow model considering flow reversal and leakage,combining AMESim software realized the transformation of the three-dimensional calculation model of the piston pump to a one-dimensional calculation model.Based on the calculation results of the initial operating conditions,this paper analyzed the flow characteristics of the piston pump and the reasons for its flow pulsation.The accuracy of the one-dimensional computational model was verified by the flow pulsation calculation results of the three-dimensional model based on the Computational Fluid Dynamics(CFD)method.On this basis,it analyzed the influence of different operating conditions(including operating temperature,working pressure and piston pump regulating parameters)on the outlet flow pulsation rate.And it analyzed the key points of adjusting and controlling the piston pump in helicopter fatigue test from the angle of reducing the flow pulsation rate and improving the test accuracy.The one-dimensional calculation model proposed in the paper can significantly improve the simulation calculation speed of piston pump,facilitate the improved design of the subsequent piston pump and be added to the virtual digital test platform as a subsystem.

关 键 词：斜盘式柱塞泵 图形解析法 一维计算模型 计算速率 流量脉动 疲劳试验 

分 类 号：TH137.51[机械工程—机械制造及自动化] TH322