Potential energy recovery method based on alternate recovery and utilization of multiple hydraulic cylinders
Potential energy recovery method based on alternate recovery and utilization of multiple hydraulic cylinders
复制标题
基于多个液压缸交替回收利用的势能回收方法
DOI：
10.1016/j.autcon.2020.103105
复制
发表时间：
2020
影响因子：
10.3
通讯作者：
Jin Yongping
中科院分区：
文献类型：
--
作者：
Gong Jun;Zhang Daqing;Guo Yong;Tang Zhongyong;Liu Changsheng;Hu Peng;Zhao Yuming;Quan Weicai;Jin Yongping
液压挖掘机的工作装置重量远远超过其提升物料的重量，需要大量的能量来维持频繁的升降运动。回收和利用这些能量是挖掘机节能的有效手段。现有的电回收方法面临的缺点包括过度的能量转换、复杂的系统和高成本。提出了一种基于多液压缸的能量交替回收利用系统。应用重量平衡的概念，使工作装置的重量与液压蓄能器的压力相匹配。在不同的液压缸中实现能量的交替回收和利用，使配重回路与原系统进行必要的换油，克服了现有独立配重系统长期运行的可靠性问题。采用能流分解的方法，通过仿真和实验对EARUS的效率进行了全面的分析。定量分析了EARUS工作装置的运动特性。结果表明，与原系统相比，EARUS系统的能量回收效率为65.9%，综合节能率为41.6%。动臂单动时间缩短了2.6 s，动臂油缸开始下降时的速度波动降低了75%。研究结果为这一新系统的工程应用提供了重要框架。
The working device weight of hydraulic excavators far exceeds that of its lifted material, requiring a large amount of energy to maintain the frequent motion of lifting and lowering. Recovering and utilizing this energy is an effective means of energy-saving for excavators. The existing electric recovery method faces disadvantages which include excessive energy conversion, a complicated system, and high cost. In this paper, an energy alternate recovery and utilization system (EARUS) based on multiple hydraulic cylinders is proposed. The concept of weight-balanced is applied to match the weight of the working device with the pressure of the hydraulic accumulator. Energy alternate recovery and utilization are realized in different hydraulic cylinders, so that the weight-balanced circuit and the original system perform the necessary oil exchange, overcoming the reliability problem of the existing isolated weight-balanced system with long-term operation. The efficiency of EARUS is comprehensively analyzed through simulation and an experiment using the methodology of energy flow decomposition. The working device motion characteristics of EARUS are then quantitatively analyzed. Results show that, compared with the original system, the energy recovery efficiency of EARUS is 65.9%, and the comprehensive energy-saving rate is 41.6%. The boom single-action time is shortened by 2.6 s, and the velocity fluctuation of the boom cylinder at the start of lowering decreases by 75%. The research findings provide an important framework for the engineering applications of this new system.