阀口独立控制液压挖掘机回转制动能量回收系统特性  

Valve ports independently control the characteristics of hydraulic excavator rotary brake energy recovery system

作　　者：王帆 黄伟男 权龙 WANG Fan;HUANG Weinan;QUAN Long(Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education,Taiyuan University of Technology, Taiyuan 030024, China)

机构地区：[1]太原理工大学新型传感器与智能控制教育部重点实验室,太原030024

出　　处：《重庆理工大学学报（自然科学）》2022年第6期126-132,共7页Journal of Chongqing University of Technology：Natural Science

基　　金：国家重点研发计划(2020YFB2009804)。

摘　　要：液压挖掘机上车回转平台转动惯量大,工作中高频次起制动,大功率的制动动能转化为控制阀阀口热能被浪费。提出阀口独立控制液压挖掘机回转制动能量回收系统,采用泵阀复合、压力流量匹配控制策略抑制回转平台起动过程的节流和溢流损失,利用阀口独立多自由度控制的优点解决制动阶段回转系统的压力冲击和反转问题;通过蓄能器回收利用回转平台制动动能;在空载制动过程中,通过增压缸向蓄能器补充油液。建立了回转系统机电液联合仿真模型,并对所提系统的运行与能耗特性进行分析。结果表明:满载和空载制动阶段蓄能器能量回收率分别为77.4%和77.8%,在增压缸的作用下解决了蓄能器油液回收不足的问题,较传统回转系统能耗降低45%。The revolving platform of hydraulic excavator has a large moment of inertia.It starts braking at high frequency during work,and the braking kinetic energy of high power is converted into heat energy of the control valve port.This paper puts forward the energy recovery system of valve port independent control hydraulic excavator revolving braking.It adopts the pump-valve compound,pressure-flow matching control strategy to restrain the throttling and overflow loss during the starting process,and uses the advantages of valve port independent multi-degree-of-freedom control to solve the pressure impact and reversal problems.The accumulator recovers the kinetic energy of the braking of the revolving platform.During no-load braking,oil is replenished to the accumulator by booster cylinder.This study establishes the electro-hydraulic co-simulation model of the revolving system,and analyzes the operation and energy consumption characteristics of the proposed system.The results show that the energy recovery rate of the accumulator in full-load and no-load braking stages is 77.4%and 77.8%,respectively.The problem of insufficient oil recovery of the accumulator is solved by the action of the booster cylinder,and the energy consumption is reduced by 45%compared with that of the traditional revolving system.

关 键 词：回转系统 蓄能器 阀口独立控制 能量回收 

分 类 号：TH137[机械工程—机械制造及自动化]