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Potential Energy Recovery and Direct Reuse System of Hydraulic Hybrid Excavators Based on the Digital Pump

Author

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  • Daling Yue

    (Energy and Power Engineering College, Lanzhou University of Technology, Lanzhou 730050, China)

  • Hongfei Gao

    (Energy and Power Engineering College, Lanzhou University of Technology, Lanzhou 730050, China)

  • Zengguang Liu

    (Energy and Power Engineering College, Lanzhou University of Technology, Lanzhou 730050, China)

  • Liejiang Wei

    (Energy and Power Engineering College, Lanzhou University of Technology, Lanzhou 730050, China)

  • Yinshui Liu

    (Energy and Power Engineering College, Lanzhou University of Technology, Lanzhou 730050, China
    School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Xiukun Zuo

    (Energy and Power Engineering College, Lanzhou University of Technology, Lanzhou 730050, China)

Abstract

The potential energy recovery of hydraulic excavators is very significant for improving energy efficiency and reducing pollutant emissions. However, the more common solutions for potential energy recovery require more energy conversion processes before these potential energies can be reused, which adds to the complexity and high cost of the system. To tackle the above challenges, we proposed a novel energy recovery system for hydraulic hybrid excavators based on the digital pump with an energy recovery function. The new system could operate in three different modes: pump, energy recovery, and direct reuse. Based on the descriptions of the working principle of the digital pump and the whole energy recovery system, the mathematical models of the digital pump, the excavator arm cylinder, and the accumulator were established and the AMESim simulation model (combining mechanics, hydraulics, and electrics) was developed. The dynamic characteristics of the energy recovery system were studied under no-load and full-load conditions. The simulation results showed that this scheme could achieve 86% energy recovery when the boom was lowered and reused the recovered energy directly when raised, which could decrease the system input energy by 78.1%. This paper can provide an optimized solution for construction machinery or off-road vehicles and presents a reference for the research on digital hydraulics.

Suggested Citation

  • Daling Yue & Hongfei Gao & Zengguang Liu & Liejiang Wei & Yinshui Liu & Xiukun Zuo, 2023. "Potential Energy Recovery and Direct Reuse System of Hydraulic Hybrid Excavators Based on the Digital Pump," Energies, MDPI, vol. 16(13), pages 1-17, July.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:13:p:5229-:d:1189143
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    References listed on IDEAS

    as
    1. Jiansong Li & Jiyun Zhao & Xiaochun Zhang, 2020. "A Novel Energy Recovery System Integrating Flywheel and Flow Regeneration for a Hydraulic Excavator Boom System," Energies, MDPI, vol. 13(2), pages 1-25, January.
    2. Tan, Lisha & He, Xiangyu & Xiao, Guangxin & Jiang, Mengjun & Yuan, Yulin, 2022. "Design and energy analysis of novel hydraulic regenerative potential energy systems," Energy, Elsevier, vol. 249(C).
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    Cited by:

    1. Ryszard Dindorf & Jakub Takosoglu & Piotr Wos, 2023. "Review of Hydro-Pneumatic Accumulator Models for the Study of the Energy Efficiency of Hydraulic Systems," Energies, MDPI, vol. 16(18), pages 1-45, September.

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