液压与气动2024，Vol.48Issue(4)：117-123,7.DOI:10.11832/j.issn.1000-4858.2024.04.016
单双泵控混合分布式挖掘机液压系统性能分析
Performance Analysis of Single and Double Pump-controlled Distributed Hydraulic System for Excavator
摘要
Abstract
Aiming at the problem of flow imbalance in pump-controlled asymmetric cylinders and multi-quadrant operating conditions of excavator boom,arm,and bucket cylinders,a hybrid distributed pump-controlled hydraulic system was proposed,consisting of single and double pump-controlled cylinder units.Based on the speed-load characteristics of each hydraulic cylinder of the excavator,a pump-controlled hydraulic unit using a single pump was designed for the boom with a two-quadrant condition,and two pump-controlled hydraulic units using a double pump in parallel were designed for the arm and bucket with a four-quadrant condition respectively.Taking a micro excavator as a test case,the multi-body dynamics model and hydraulic system model were established in MATLAB/Simulink.Further,PID position controllers were designed and simulation under a typical digging cycle were performed.The results show that the efficiencies of boom equipping with single pump unit and double pump in parallel unit are equivalent but the latter one can eliminate the velocity oscillation under four-quadrant conditions and under a typical digging cycle,the overall efficiency of the proposed system is 62％.关键词
双泵并联/分布式泵控液压系统/速度-负载特性/液压挖掘机/四象限工况Key words
double pump in parallel/distributed pump-controlled hydraulic system/speed-load characteristics/hydraulic excavator/four-quadrant operation分类
机械制造引用本文复制引用
张树忠,刘意,郑祥盘,张雪峰..单双泵控混合分布式挖掘机液压系统性能分析[J].液压与气动,2024,48(4):117-123,7.基金项目
福建省自然科学基金(2021J011051) （2021J011051）
福建省高校产学合作项目(2020H6025) （2020H6025）
2022年省级科技创新重点项目资助(2022G02007) （2022G02007）
福建省2022年中央引导地方科技发展资金项目(2022L3014) （2022L3014）
