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Windage power loss reductions in high-speed gear pairs

Reduzierte Verlustleistung bei Hochgeschwindigkeitsgetrieben

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Abstract

This paper deals with recent experimental and numerical research in the possible reduction of windage power losses (WPL). It is accepted that these load-independent losses become prominent over other sources in mechanical transmissions with peripheral speeds above 100 m/s as is the case in energy production, aeronautics and electric vehicles. So far, the majority of the experiments and models deal with WPL evaluation for one single rotating pinion. The unique test rig designed at INSA Lyon makes it possible to measure both the WPL of a single pinion or a non-meshing pinion-gear pair. A number of comparisons between experimental and numerical results are presented and commented upon. It is shown, that the gear environment changes the airflow and, in depending on the cases, it can either reduce or increase WPL. Finally, the influence of pinion-gear couplings on WPL is discussed as well as the interest of shrouds and deflectors.

Zusammenfassung

Dieser Artikel befasst sich mit neueren experimentellen und numerischen Untersuchungen zur möglichen Reduzierung von Luftwiderstandsverlusten (WPL). Es wird davon ausgegangen, dass diese lastunabhängigen Verluste bei mechanischen Getrieben mit Umfangsgeschwindigkeiten über 100 m/s gegenüber anderen Quellen eine herausragende Rolle spielen, wie dies bei der Energieerzeugung, in der Luftfahrt und bei Elektrofahrzeugen der Fall ist. Bisher befasst sich die Mehrzahl der Experimente und Modelle mit der WPL-Bewertung für ein einzelnes rotierendes Ritzel. Mit dem einzigartigen Prüfstand von INSA Lyon kann sowohl die WPL eines einzelnen Ritzels als auch eines nicht kämmenden Ritzelpaares gemessen werden. Eine Reihe von Vergleichen zwischen experimentellen und numerischen Ergebnissen wird vorgestellt und kommentiert. Es wird gezeigt, dass die Getriebeumgebung den Luftstrom verändert und in Abhängigkeit von den Fällen die WPL entweder verringern oder erhöhen kann. Abschließend wird der Einfluss von Ritzelkupplungen auf die WPL sowie das Interesse von Abdeckungen und Deflektoren erörtert.

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Authors and Affiliations

  1. INSA Lyon—LaMCoS UMR5259, Université de Lyon, Lyon, France

    M. Ruzek, F. Ville & P. Velex

  2. ECAM Lyon, INSA Lyon, LabECAM, Université de Lyon, Lyon, France

    Y. Marchesse

Authors
  1. M. Ruzek
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  2. Y. Marchesse
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  3. F. Ville
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  4. P. Velex
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Correspondence to M. Ruzek.

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Ruzek, M., Marchesse, Y., Ville, F. et al. Windage power loss reductions in high-speed gear pairs. Forsch Ingenieurwes 83, 387–392 (2019). https://doi.org/10.1007/s10010-019-00336-7

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  • DOI: https://doi.org/10.1007/s10010-019-00336-7

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