Evaluating the Influence of Leaking Active Check Valves in Digital Displacement® Units

Niels Christian Bender, Henrik Clemmensen Pedersen, Bernd Winkler, Andreas Plöckinger

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

1 Citation (Scopus)

Abstract

This paper presents a framework to evaluate different power losses in regards to hydraulic valves used in Digital Displacement ® Units (DDU). The feasibility of DDU may be compromised if internal leakage in the hydraulic valves develops over time, introduction of a time-dimension is the objective of this work. The actual leakage that will develop over time due to mechanical wear is unknown, which is the main reason why previous work has not addressed this research topic. The underlying assumption of the developed framework is that internal leakage propagates as a consequence of the amount of valve switching cycles. This assumption is combined with physical knowledge about a DDU into one theoretical framework, which is defined both as non-linear differential equations and as a timeaveraged static model to visualize the difference in accuracy when put into context of a specific machine. Thereby reducing the required simulation time and enhancing design possibilities. The main contribution of this work is a revision of the conventional efficiency curve of a DDU, where it now includes a novel trade-off between averaged displacement and efficiency (without partial strokes). Over a period of 25 years an average displacement of 55%. is shown to be optimal from an energy perspective.
Original languageEnglish
Title of host publicationProceedings of the 2018 Global Fluid Power Society PhD Symposium (GFPS)
Number of pages9
PublisherIEEE
Publication dateJul 2018
Pages1-9
ISBN (Print)978-1-5386-4786-8
ISBN (Electronic)978-1-5386-4785-1
DOIs
Publication statusPublished - Jul 2018
Event2018 Global Fluid Power Society PhD Symposium (GFPS) - Samara, Russian Federation
Duration: 18 Jul 201820 Jul 2018

Conference

Conference2018 Global Fluid Power Society PhD Symposium (GFPS)
CountryRussian Federation
CitySamara
Period18/07/201820/07/2018

Fingerprint

Hydraulics
Leakage (fluid)
Differential equations
Wear of materials

Keywords

  • Digital Displacement®
  • Digital hydraulic valves
  • Design framework
  • Leakage loss
  • Efficiency

Cite this

Bender, N. C., Pedersen, H. C., Winkler, B., & Plöckinger, A. (2018). Evaluating the Influence of Leaking Active Check Valves in Digital Displacement® Units. In Proceedings of the 2018 Global Fluid Power Society PhD Symposium (GFPS) (pp. 1-9). IEEE. https://doi.org/10.1109/GFPS.2018.8472399
Bender, Niels Christian ; Pedersen, Henrik Clemmensen ; Winkler, Bernd ; Plöckinger, Andreas. / Evaluating the Influence of Leaking Active Check Valves in Digital Displacement® Units. Proceedings of the 2018 Global Fluid Power Society PhD Symposium (GFPS). IEEE, 2018. pp. 1-9
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abstract = "This paper presents a framework to evaluate different power losses in regards to hydraulic valves used in Digital Displacement {\circledR} Units (DDU). The feasibility of DDU may be compromised if internal leakage in the hydraulic valves develops over time, introduction of a time-dimension is the objective of this work. The actual leakage that will develop over time due to mechanical wear is unknown, which is the main reason why previous work has not addressed this research topic. The underlying assumption of the developed framework is that internal leakage propagates as a consequence of the amount of valve switching cycles. This assumption is combined with physical knowledge about a DDU into one theoretical framework, which is defined both as non-linear differential equations and as a timeaveraged static model to visualize the difference in accuracy when put into context of a specific machine. Thereby reducing the required simulation time and enhancing design possibilities. The main contribution of this work is a revision of the conventional efficiency curve of a DDU, where it now includes a novel trade-off between averaged displacement and efficiency (without partial strokes). Over a period of 25 years an average displacement of 55{\%}. is shown to be optimal from an energy perspective.",
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Bender, NC, Pedersen, HC, Winkler, B & Plöckinger, A 2018, Evaluating the Influence of Leaking Active Check Valves in Digital Displacement® Units. in Proceedings of the 2018 Global Fluid Power Society PhD Symposium (GFPS). IEEE, pp. 1-9, 2018 Global Fluid Power Society PhD Symposium (GFPS), Samara, Russian Federation, 18/07/2018. https://doi.org/10.1109/GFPS.2018.8472399

Evaluating the Influence of Leaking Active Check Valves in Digital Displacement® Units. / Bender, Niels Christian; Pedersen, Henrik Clemmensen; Winkler, Bernd; Plöckinger, Andreas.

Proceedings of the 2018 Global Fluid Power Society PhD Symposium (GFPS). IEEE, 2018. p. 1-9.

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

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Bender NC, Pedersen HC, Winkler B, Plöckinger A. Evaluating the Influence of Leaking Active Check Valves in Digital Displacement® Units. In Proceedings of the 2018 Global Fluid Power Society PhD Symposium (GFPS). IEEE. 2018. p. 1-9 https://doi.org/10.1109/GFPS.2018.8472399