液压与气动2025，Vol.49Issue(4)：48-55,8.DOI:10.11832/j.issn.1000-4858.2025.04.006
基于变排量液压泵/马达的挖掘机回转系统特性与能效分析
Characteristics and Energy Efficiency Analysis of Excavator Swing System Based on Variable Displacement Hydraulic Pump/Motor
摘要
Abstract
During the operation of a hydraulic excavator,the swing system will experience large inertia and high-frequency braking.During the braking process,a large amount of kinetic energy is converted into thermal energy and dissipated through the relief valve port,resulting in serious energy waste.This study proposes integrating a variable displacement hydraulic pump/motor and accumulator into the positive flow control swing system to recover and reuse braking energy.A mechanical-hydraulic integrated simulation model of a 38 t hydraulic excavator was developed to simulate braking energy recovery under various working conditions,with a focus on analyzing accumulator pressure changes.By leveraging the independently adjustable displacement of the variable motor,the accumulator output flow is controlled to align with the power demands of the original system.The impact of variable pump/motor displacement on the swing system's performance under different loads and speeds was also investigated.The results indicate that during the startup phase,the displacement adjustment of the variable hydraulic motor decreases as the excavator's speed increases and increases with higher moments of inertia.This approach reduces the energy consumption of the swing system by 41.6%to 52.4%compared to the original system,significantly enhancing energy efficiency.关键词
变排量液压马达/动能回收/回转系统/工程机械/挖掘机Key words
variable displacement hydraulic motor/kinetic energy recovery/swing system/construction machinery/excavator分类
机械工程引用本文复制引用
解松涛,崔金元,黄伟男,权龙,武瀚文..基于变排量液压泵/马达的挖掘机回转系统特性与能效分析[J].液压与气动,2025,49(4):48-55,8.基金项目
国家自然科学基金青年科学基金(52105067) （52105067）
