Abstract
Planetary gearsets are widely used in several mechanical systems and have numerous advantages over counter-shaft gears. Despite this, the complex arrangement of components in a planetary gear system makes them susceptible to noise and vibration issues. An exhaustive and rich literature is available on the topic of planetary gear dynamics, but most of these studies consider only the parametric excitation of gear mesh contacts while assuming an ideal power source. But contrary to this popular assumption, realistic power sources (IC Engine, electric motor, wind turbine, etc.) could be subjected to torque fluctuations based on the operating conditions. The current study presents a theoretical investigation on the load distribution and dynamic behavior of planetary gear sets subjected to both internal and external excitations. A three-dimensional dynamic planetary load distribution model that inherently captures the internal excitation due to the elastic gear mesh contacts is employed in this study. The influence of operating conditions on both system-level response and local gear mesh contact stress distribution are explored. Discussed results not only illustrate the potential of the dynamic model but also reinforce the need for such computationally efficient models for design and analysis purposes.
Zusammenfassung
Planetengetriebe sind in mehreren mechanischen Systemen weit verbreitet und haben zahlreiche Vorteile gegenüber Gegenwellengetrieben. Trotzdem macht die komplexe Anordnung von Komponenten in einem Planetengetriebe sie anfällig für Lärm- und Vibrationsprobleme. Eine erschöpfende und reichhaltige Literatur ist zum Thema der planetendynamischen Gangdynamik verfügbar, aber die meisten dieser Studien betrachten nur die parametrische Anregung von Zahnradnetzkontakten, während sie eine ideale Kraftquelle annehmen. Entgegen dieser gängigen Annahme könnten jedoch realistische Energiequellen (IC-Motor, Elektromotor, Windkraftanlage usw.) Drehmomentschwankungen auf der Grundlage der Betriebsbedingungen ausgesetzt werden. Die aktuelle Studie präsentiert eine theoretische Untersuchung über die Lastverteilung und das dynamische Verhalten von Planetengetriebesätzen, die sowohl internen als auch externen Anregungen ausgesetzt sind. In dieser Studie wird ein dreidimensionales dynamisches Planetenlastverteilungsmodell verwendet, das die interne Anregung durch die elastischen Zahnnetzkontakte inhärent erfasst. Der Einfluss der Betriebsbedingungen auf die Reaktion auf Systemebene und die Verteilung der Kontaktspannungsverteilung im lokalen Zahnnetznetz wird untersucht. Die diskutierten Ergebnisse veranschaulichen nicht nur das Potenzial des dynamischen Modells, sondern verstärken auch die Notwendigkeit solcher recheneffizienten Modelle für Entwurfs- und Analysezwecke.
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L. Ryali and D. Talbot declare that they have no competing interests.
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Ryali, L., Talbot, D. Dynamic load distribution of planetary gear sets subject to both internal and external excitations. Forsch Ingenieurwes 86, 283–294 (2022). https://doi.org/10.1007/s10010-021-00506-6
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DOI: https://doi.org/10.1007/s10010-021-00506-6