混凝土泵车泵控系统建模仿真与特性分析  

Modeling Simulation and Characteristics Analysis of Pump Control System of Concrete Pump Truck

作　　者：黄明辉 王照卓 潘晴 李毅波 文晨阳 HUANG Minghui;WANG Zhaozhuo;PAN Qing;LI Yibo;WEN Chenyang(College of Mechanical and Electrical Engineering/State Key Laboratory of High Performance Complex Maunfacturing, Central South University, Changsha 410083,Hunan, China;State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, Zhejiang, China)

机构地区：[1]中南大学机电工程学院/高性能复杂制造国家重点实验室,湖南长沙410083 [2]浙江大学流体动力与机电系统国家重点实验室,浙江杭州310027

出　　处：《华南理工大学学报（自然科学版）》2022年第3期106-118,共13页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51805551);湖南省创新型省份建设专项(2019HK2171)。

摘　　要：针对混凝土泵车系统中的关键核心液压元部件柱塞泵进行数字化建模仿真和验证分析。以锥形缸体斜盘式轴向柱塞泵为研究对象,在对其运动规律和工作原理分析的基础上,采用空间几何的方法表征柱塞运动学特性和流量特性,利用AMESim仿真软件建立变量泵体柱塞模型。基于变量泵恒功率控制、恒压力控制及电液比例控制变排量原理等的分析,建立了包含泵体柱塞模型、配流盘配流模型、滑靴模型、变量机构模型等子模型的功率-压力-电比例复合控制变量泵AMESim仿真数字化模型。通过对斜盘倾角、电机转速、系统负载及控制电流的组合控制,研究了柱塞泵出口流量特性、压力排量特性、电流排量特性以及瞬态响应特性。研究结果表明:采用所建立的液压泵数字化模型所获得仿真特性曲线与测试结果吻合度较高,压力排量特性与电流排量特性预测的最大相对误差分别为6.31%和7.73%,从而验证了模型的准确性,为工程机械数字孪生和性能优化升级提供了模型支撑。This study carried out digital modeling,simulation and verification analysis on the piston pump which is the key hydraulic component of concrete pump truck system.Based on the analysis of its motion law and working principle,it took the swash plate axial piston pump with conical cylinder blocks as the research object,and characterized the kinematic characteristics and flow characteristics of the piston with the method of space geometry and established a variable pump plunger model with AMESim simulation software.Based on the analysis of constant power control,constant pressure compensator control and electro-hydraulic proportional control variable displacement principle of variable pump,etc.,this study established a power-pressure-electro-hydraulic proportional compound controlled variable pump AMESim simulation digital model including sub-models such as the pump body piston model,valve plate model,sliding shoe model,variable mechanism model,etc.The outlet flow characteristics,pressure displacement characteristics,current displacement characteristics and transient response characteristics of the plunger pump were studied through the coordinated control of control of the swash plate inclination angle,motor speed,system load and control current.The research results show that the simulation characteristic curve obtained by using the established hydraulic pump digital model is in good agreement with the test results,and the maximum relative errors of the pressure displacement characteristic and current displacement characteristic prediction are 6.31%and 7.73%,respectively.Thus it verifies the accuracy of the model and provides model supports for digital twins and performance optimization upgrades of construction machinery.

关 键 词：斜盘式轴向柱塞泵 锥形缸体 恒功率控制 恒压力控制 电液比例控制 AMESIM 

分 类 号：TH137.51[机械工程—机械制造及自动化]