电动工程机械变转速-定量泵压差可控阀前补偿负载敏感系统研究

doi:10.3901/JME.2025.22.355

机械工程学报 ›› 2025, Vol. 61 ›› Issue (22): 355-369.doi: 10.3901/JME.2025.22.355

• 交叉与前沿 • 上一篇

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电动工程机械变转速-定量泵压差可控阀前补偿负载敏感系统研究

林元正^1,2,3, 林添良^1,2,3, 李钟慎^1,2,3, 缪骋^1,2,3, 陈其怀^1,2,3, 赵恒^1,2,3, 石家榕^1,2,3

1. 华侨大学机电及自动化学院厦门 361021;
2. 福建省移动机械绿色智能驱动与传动重点实验室厦门 361021;
3. 机械工业工程机械绿色机电液驱动与传动技术重点实验室厦门 361021

收稿日期:2025-01-06 修回日期:2025-07-04 发布日期:2026-01-10
作者简介:林元正,男,1994年出生,博士研究生。主要研究方向为工程机械高效电液传动与控制。E-mail:lin_yuanzheng@163.com
林添良(通信作者),男,1983年出生,博士,教授,博士研究生导师。主要研究方向为重型移动机械绿色节能和智能化技术。E-mail:ltl@hqu.edu.cn
基金资助:
国家重点研发计划(2023YFB3406601); 国家自然科学基金(52175051); 福建省自然科学基金(2023J01118)资助项目。

Pressure Margin Controllable Pre-compensated Load Sensing System with Variable Speed-fixed Displacement Pumps for Electric Construction Machinery

LIN Yuanzheng^1,2,3, LIN Tianliang^1,2,3, LI Zhongshen^1,2,3, MIAO Cheng^1,2,3, CHEN Qihuai^1,2,3, ZHAO Heng^1,2,3, SHI Jiarong^1,2,3

1. College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021;
2. Fujian Key Laboratory of Green Intelligent Drive and Transmission for Mobile Machinery, Xiamen 361021;
3. Machinery Industry Key Laboratory of Green Electromechanical Hydraulic Drive and Transmission Technology for Construction Machinery, Xiamen 361021

Received:2025-01-06 Revised:2025-07-04 Published:2026-01-10

摘要/Abstract

摘要： 工程机械电动化和智能化发展对负载敏感系统提出了更高的节能性和操控性要求。针对传统负载敏感系统的阀前补偿不抗流量饱和、阀后补偿存在额外换向能耗、系统压差固定设置等问题，提出一种变转速-定量泵压差可控阀前补偿负载敏感系统，进一步设计变转速压差调控和抗流量饱和控制策略，并进行仿真和试验研究。研究结果表明，①所提系统具有良好的抗流量饱和特性；②所提系统可运行在不同系统压差以获得可变阀口流量增益，避免系统进入流量饱和，与LUDV系统相比，主阀芯有效控制行程得到拓展，具有更加良好的微调特性和流量控制特性；③与LUDV系统相比，所提系统消除了额外换向节流损失并降低阀口节流损失，在不同执行器速度工况下，系统能耗降低6.3%～13.7%。

关键词: 负载敏感, 电动工程机械, 阀前补偿, 抗流量饱和, 变转速控制, 变压差控制

Abstract: The development of electrification and intelligence of construction machinery has put forward higher requirements for energy saving and maneuverability of load sensing system. Aiming at the problems of the conventional load sensing system, such as the lack of anti-flow saturation function of pre-compensated type, the extra energy consumption of post-compensated type, and the fixed setting of the pressure margin, a pressure margin controllable pre-compensated load sensing system with variable speed-fixed displacement pumps is proposed, and the variable speed-pressure margin regulation and anti-flow saturation control strategies are further designed, and simulation and experimental studies are carried out. The results show that,① the proposed system has good anti-flow saturation characteristics;② the proposed system can be operated at different pressure margins to obtain variable flow gains to avoid the system from entering flow saturation, and the effective control stroke of the main spool has been improved to have better fine-tuning and flow control characteristics compared with the LUDV system;③ The proposed system eliminates additional commutation throttling losses and reduces orifice throttling losses compared to the LUDV system, resulting in a reduction in system energy consumption of 6.3% to 13.7% at different actuator speed conditions.

Key words: load sensing, electric construction machinery, pre-compensation, anti-flow saturation, variable speed control, variable pressure margin control

中图分类号:

TH137

林元正, 林添良, 李钟慎, 缪骋, 陈其怀, 赵恒, 石家榕. 电动工程机械变转速-定量泵压差可控阀前补偿负载敏感系统研究[J]. 机械工程学报, 2025, 61(22): 355-369.

LIN Yuanzheng, LIN Tianliang, LI Zhongshen, MIAO Cheng, CHEN Qihuai, ZHAO Heng, SHI Jiarong. Pressure Margin Controllable Pre-compensated Load Sensing System with Variable Speed-fixed Displacement Pumps for Electric Construction Machinery[J]. Journal of Mechanical Engineering, 2025, 61(22): 355-369.

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电动工程机械变转速-定量泵压差可控阀前补偿负载敏感系统研究

Pressure Margin Controllable Pre-compensated Load Sensing System with Variable Speed-fixed Displacement Pumps for Electric Construction Machinery

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