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A Self-Contained Electro-Hydraulic Cylinder with Passive Load-Holding Capability

Author

Listed:
  • Damiano Padovani

    (Department of Engineering Sciences, University of Agder, 4879 Grimstad, Norway)

  • Søren Ketelsen

    (Department of Energy Technology, Aalborg University, 9220 Aalborg East, Denmark)

  • Daniel Hagen

    (Department of Engineering Sciences, University of Agder, 4879 Grimstad, Norway)

  • Lasse Schmidt

    (Department of Energy Technology, Aalborg University, 9220 Aalborg East, Denmark)

Abstract

Self-contained electro-hydraulic cylinders have the potential to replace both conventional hydraulic systems and the electro-mechanical counterparts enhancing energy efficiency, plug-and-play installation, and reduced maintenance. Current commercial solutions of this technology are limited and typically tailor-made, whereas the research emphasis is primarily on cost efficiency and power applications below five [kW]. Therefore, there is the need of developing more flexible systems adaptable to multiple applications. This research paper offers a contribution in this regard. It presents an electro-hydraulic self-contained single-rod cylinder with passive load-holding capability, sealed tank, capable of recovering energy, and scalable up to about eighty [kW]. The system implementation on a single-boom crane confirms its feasibility: The position tracking error remains well within ±2 [mm], oscillations are limited, and the overall energy efficiency is about 60 [%] during actuation. Concerning the passive load-holding devices, it is shown that both vented and non-vented pilot-operated check valves achieve the desired functioning and can hold the actuator position without consuming energy. Additional observations about the size and the arrangement of the load-holding valves are also provided. In conclusion, this paper demonstrates that the proposed self-contained cylinder can be successfully extended to several practical applications, especially to those characterized by overrunning external loads and the need of securing the actuator position.

Suggested Citation

  • Damiano Padovani & Søren Ketelsen & Daniel Hagen & Lasse Schmidt, 2019. "A Self-Contained Electro-Hydraulic Cylinder with Passive Load-Holding Capability," Energies, MDPI, vol. 12(2), pages 1-21, January.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:2:p:292-:d:198790
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    References listed on IDEAS

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    1. Quan, Zhongyi & Quan, Long & Zhang, Jinman, 2014. "Review of energy efficient direct pump controlled cylinder electro-hydraulic technology," Renewable and Sustainable Energy Reviews, Elsevier, vol. 35(C), pages 336-346.
    2. Zhang, Dahai & Li, Wei & Lin, Yonggang & Bao, Jingwei, 2012. "An overview of hydraulic systems in wave energy application in China," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(7), pages 4522-4526.
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    Citations

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    Cited by:

    1. Lasse Schmidt & Søren Ketelsen & Morten Helms Brask & Kasper Aastrup Mortensen, 2019. "A Class of Energy Efficient Self-Contained Electro-Hydraulic Drives with Self-Locking Capability," Energies, MDPI, vol. 12(10), pages 1-26, May.
    2. Teemu Koitto & Heikki Kauranne & Olof Calonius & Tatiana Minav & Matti Pietola, 2019. "Experimental Study on Fast and Energy-Efficient Direct Driven Hydraulic Actuator Unit," Energies, MDPI, vol. 12(8), pages 1-17, April.
    3. Paolo Casoli & Fabio Scolari & Carlo Maria Vescovini & Massimo Rundo, 2022. "Energy Comparison between a Load Sensing System and Electro-Hydraulic Solutions Applied to a 9-Ton Excavator," Energies, MDPI, vol. 15(7), pages 1-15, April.
    4. Wang, Feng & Wu, Jiaming & Lin, Zichang & Zhang, Haoxiang & Xu, Bing, 2023. "A power-sharing electro-hydraulic actuator system to downsize electric motors for electric mobile machines," Energy, Elsevier, vol. 284(C).
    5. Søren Ketelsen & Damiano Padovani & Torben O. Andersen & Morten Kjeld Ebbesen & Lasse Schmidt, 2019. "Classification and Review of Pump-Controlled Differential Cylinder Drives," Energies, MDPI, vol. 12(7), pages 1-27, April.
    6. Konrad Johan Jensen & Morten Kjeld Ebbesen & Michael Rygaard Hansen, 2021. "Novel Concept for Electro-Hydrostatic Actuators for Motion Control of Hydraulic Manipulators," Energies, MDPI, vol. 14(20), pages 1-27, October.
    7. Qu, Shaoyang & Fassbender, David & Vacca, Andrea & Busquets, Enrique, 2021. "A high-efficient solution for electro-hydraulic actuators with energy regeneration capability," Energy, Elsevier, vol. 216(C).
    8. Lasse Schmidt & Kenneth Vorbøl Hansen, 2022. "Electro-Hydraulic Variable-Speed Drive Networks—Idea, Perspectives, and Energy Saving Potentials," Energies, MDPI, vol. 15(3), pages 1-33, February.
    9. Søren Ketelsen & Sebastian Michel & Torben O. Andersen & Morten Kjeld Ebbesen & Jürgen Weber & Lasse Schmidt, 2021. "Thermo-Hydraulic Modelling and Experimental Validation of an Electro-Hydraulic Compact Drive," Energies, MDPI, vol. 14(9), pages 1-29, April.

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