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On windage power loss reduction achieved by flanges

Reduzierung der Verlustleistung durch Flansche

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Abstract

It is commonly accepted that the load-independent losses in high-speed gears can become prominent for peripheral speeds above 100 m/s. In this context, it has been shown that flanges and shrouds can mitigate these windage effects but no clear conclusions have been reached about the influence of radial and axial obstacles, especially for high-speeds. Moreover, the proposed solutions should be compatible with the casing design, including the possibility to properly lubricate and cool down the gears. In this paper, a specific test rig is used in order to investigate the power loss reductions when either one or two axial flanges are mounted close to the gears. It is shown that windage power losses are strongly reduced when flanges are very close to the gear faces. The influence of several parameters such as the number of flanges, the gear module and the gear geometry (i.e. spur or helical) is discussed. Finally, an approximate equation is proposed, which can be used to estimate WPL reductions at the design stage.

Zusammenfassung

Es ist allgemein anerkannt, dass die lastunabhängigen Verluste in Hochgeschwindigkeitsgetrieben bei Umfangsgeschwindigkeiten über 100 m/s deutlich werden können. In diesem Zusammenhang hat sich gezeigt, dass Flansche und Deckbänder diese Windwirkungseffekte abmildern können, jedoch wurden keine eindeutigen Aussagen über den Einfluss von radialen und axialen Hindernissen, insbesondere bei hohen Drehzahlen, getroffen. Darüber hinaus sollten die vorgeschlagenen Lösungen mit dem Gehäusedesign kompatibel sein, einschließlich der Möglichkeit, die Getriebe richtig zu schmieren und zu kühlen. In diesem Artikel wird ein spezieller Prüfstand verwendet, um die Verlustleistungsreduzierung zu untersuchen, wenn entweder ein oder zwei axiale Flansche in der Nähe der Zahnräder montiert werden. Es zeigt sich, dass die Seitenleistungsverluste stark reduziert werden, wenn die Flansche sehr nahe an den Zahnflanken liegen. Der Einfluss verschiedener Parameter wie der Anzahl der Flansche, des Verzahnungsmoduls und der Verzahnungsgeometrie (z. B. Stirnrad oder Schrägverzahnung) wird diskutiert. Schließlich wird eine Näherungsgleichung vorgeschlagen, die verwendet werden kann, um WPL-Reduktionen in der Entwurfsphase abzuschätzen.

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Notes

  1. Two types of enclosures are defined: shrouds are radially positioned; flanges are axially placed with respect to the pinion.

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Authors and Affiliations

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

    Y. Marchesse

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

    M. Ruzek, F. Ville & P. Velex

Authors
  1. Y. Marchesse
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  2. M. Ruzek
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  3. F. Ville
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  4. P. Velex
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Corresponding author

Correspondence to M. Ruzek.

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Y. Marchesse, M. Ruzek, F. Ville and P. Velex declare that they have no competing interests.

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Marchesse, Y., Ruzek, M., Ville, F. et al. On windage power loss reduction achieved by flanges. Forsch Ingenieurwes 86, 389–394 (2022). https://doi.org/10.1007/s10010-021-00569-5

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  • DOI: https://doi.org/10.1007/s10010-021-00569-5

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