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Research on energy saving system of hydraulic excavator based on three-chamber accumulator

挖掘机 累加器(密码学) 带宽遏流 水力机械 液压蓄能器 工程类 液压泵 汽车工程 液压马达 能源消耗 海洋工程 机械工程 环境科学 计算机科学 电气工程 气体压缩机 算法
作者
Cheng Yang,Lianquan Zhou,Jinfeng Wang,Tian Xu,Cunzhi Yang,Ye Guo
出处
期刊:Journal of energy storage [Elsevier BV]
卷期号:72: 108571-108571 被引量:10
标识
DOI:10.1016/j.est.2023.108571
摘要

As the boom of a hydraulic excavator drops, the potential energy accumulated during the lifting process is converted into thermal energy and dissipated through the throttling action of the hydraulic valve, leading to excessive fuel consumption and serious energy waste. In order to address these issues, a hydraulic excavator energy saving system based on a three-chamber accumulator is proposed. Firstly, the conventional piston-type hydraulic accumulator is integrated with the hydraulic cylinder to form a three-chamber accumulator, which has a pressurizing function during energy storage. Then, a hydraulic excavator energy saving system based on three-chamber accumulator is proposed, which can store and reuse the energy loss from throttling and overflow of the hydraulic system without changing the hydraulic system of the excavator. The potential energy of the boom during drop is converted into hydraulic energy and stored in the three-chamber accumulator, which is then released to drive the boom lift, and the original system of the excavator does not work in both situations. The proposed boom speed control system ensures the operability of the excavator. The energy saving system was tested on a 21.5-ton hydraulic excavator, and the results showed that the energy consumption of the boom lifting hydraulic circuit was reduced by 47.99 %, and the engine fuel consumption was reduced by 11.42 %. This system can also be applied to other hydraulic equipment with frequent changes in potential energy of the working mechanism.
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