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Low noise and transmission error epicylic gearbox designs

Lookup NU author(s): Dr Timothy Lisle, Professor Brian Shaw, Dr Robert Frazer, Yang Yang, Layue Zhao



This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Gear Manufacturers Association, 2021.

For re-use rights please refer to the publisher's terms and conditions.


The unique nature by which power is shared via multiple planets, makes epicyclic gearboxes an attractive solution for high power density, lightweight applications, such as aerospace transmissions. However, their complexity, including multiple load paths, unequal load sharing and phases of meshing, are such that the transmission error optimisation is substantially more complex than standard single stage parallel axis gearboxes. Here, an existing epicyclic gearbox was re-designed using the theory of phasing to minimise the magnitude of transmission error. Two considerably different epicyclic gearboxes were investigated: 1) A high contact ratio spur with out-of-phase planets, and 2) an integer overlap ratio helical with out-of-phase planets.

Publication metadata

Author(s): Lisle TJ, Shaw BA, Frazer RC, Yang Y, Zhao L

Publication type: Article

Publication status: Published

Journal: Power Transmission Engineering

Year: 2021

Issue: August 2021

Pages: 42-47

Online publication date: 01/08/2021

Acceptance date: 01/08/2021

Date deposited: 09/12/2021

ISSN (print): 2331-2483

ISSN (electronic): 2331-2491

Publisher: American Gear Manufacturers Association