基于压力反馈纯电驱动装载机专用电液换挡系统及控制策略研究  

Electro-hydraulic Shift System and Control Strategy for Pure Electric Loader Based on Pressure Feedback

作　　者：郭桐 蔡少乐 陈其怀 林添良[1] 陈海斌 付胜杰[1] 郭海波 GUO Tong;CAI Shao-le;CHEN Qi-huai;LIN Tian-liang;CHEN Hai-bin;FU Sheng-jie;GUO Hai-bo(College of Mechanical Engineering and Automation,Huaqiao University,Xiamen,Fujian 361021;Fujian Southchina Machinery Manufacture Co.,Ltd.,Quanzhou,Fujian 362100)

机构地区：[1]华侨大学机电及自动化学院,福建厦门361021 [2]福建华南重工机械制造有限公司,福建泉州362100

出　　处：《液压与气动》2020年第12期22-29,共8页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(5187521);福建省杰出青年基金(2018J06014);福建省高校产学研重大项目(2017H6013,2019 H6015);福建省自然科学基金(2019J01060);福建省STS计划配套项目(2018T3015)。

摘　　要：鉴于纯电驱动和传统驱动方式的差异,考虑到工程机械工况复杂多变、负载波动剧烈的特点,现有的动力换挡控制无法很好地适用于纯电驱动工程机械。针对某5 t纯电驱动装载机,提出了一种基于压力反馈的电液换挡系统及控制策略。通过分析换挡规律,根据现有动力换挡变速箱,结合电传动技术及电液控制系统,提出了基于压力反馈控制驱动电机工作在转速、转矩模式,实现了对离合器充、泄油过程中扭矩相自适应和惯性相调速。利用AMESim建立了机电液仿真模型,仿真结果表明:所提出的控制策略能大幅度改善换挡冲击度、滑摩功以及换挡时间。In view of the difference between pure electric drive and traditional drive mode,considering the characteristics of complex and variable working conditions of construction machinery and severe load fluctuation,the existing power shift control cannot be well applied to pure electric drive construction machinery.For a 5 ton pure electric drive loader,an electro-hydraulic shift control strategy based on pressure feedback is proposed.By analyzing the shifting rules,according to the existing power shift transmission,combined with the electric transmission technology and the electro-hydraulic control system,it is proposed to control the drive motor to work in the speed and torque mode based on pressure feedback,and realize the process of charging and draining the clutch.Torque phase adaptation and inertia phase speed regulation.The electromechanical hydraulic simulation model was established using AMESim.The simulation results show that the proposed control strategy can greatly improve the shift impact,sliding power and shift time.

关 键 词：工程机械 纯电驱动 电液换挡 控制策略 换挡品质 

分 类 号：TH137[机械工程—机械制造及自动化]