摘要
轮式挖掘机行走时,行驶速度变化频繁,负载的剧烈变化导致发动机效率低下;制动时动能由机械制动器消耗,大量机械能转化为热能,能量损失严重。为此,提出液电混合驱动轮式挖掘机行走系统,采用高能效的伺服电机控制行走速度,液压泵/马达与蓄能器组合,回收制动动能,并在加速等大功率工况辅助电机驱动行走系统。对系统的工作原理进行参数设计,制定驱动与制动控制策略,建立原机行走系统与所提系统的多学科联合仿真模型,进行仿真分析。结果表明:相同工况下,与原机行走系统相比,液电混合驱动行走系统能耗降低了56.5%,高效回收了制动动能。
When wheel excavator walking, the driving speed changes frequently, and the violent changes in load lead to low engine efficiency, When braking, the kinetic energy is consumed by mechanical brakes, and large quantities mechanical energy is converted into heat energy. Hydraulic-electric hybrid drive wheel excavator walking system is proposed, Motor control speed, hydraulic pump/motor and accumulator are combined to recover the braking kinetic energy and assist motor to drive the walking system under high power conditions such as acceleration. According to the principle of proposed system, the parameters are designed, driving and braking control strategies are formulated, and multidisciplinary simulation model of original walking system and proposed system is established for simulation analysis. The results show that under the same working conditions, compared with the original walking system, the hydraulic-electric hybrid drive system reduces the energy consumption by 56.5%, and the braking kinetic energy is recovered efficiently.
作者
任佳信
黄伟男
权龙
冯克温
REN Jia-xin;HUANG Wei-nan;QUAN Long;FENG Ke-wen(Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education and Shanxi Province,Taiyuan University of Technology,Taiyuan,Shanxi 030024)
出处
《液压与气动》
北大核心
2023年第2期92-99,共8页
Chinese Hydraulics & Pneumatics
基金
国家重点研发计划(2021YFB2011903)
国家自然科学青年基金(52105067)。
关键词
轮式挖掘机
行走系统
液电混合驱动
节能
wheel excavator
walking system
hydraulic-electric hybrid driving
energy saving
