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Effects of linear and angular misalignment on a spur gear pair

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This paper investigates the effects of linear and angular misalignments on static contact parameters in a gear pair, taken at various points during the gear meshing cycle. The parameters of interest include the degree to which the load is shared among the teeth in contact (load sharing ratio (LSR)), the reaction forces at the gear centres and the static transmission error (STE), which can be thought of as the energy stored in the system. The LSR and STE are frequently used in vibratory models of gearboxes to model the coupling between gears and have considerable effects on the system response.

In the current work, these parameters are calculated through the analysis of a 3D spur gear model in the finite element package ABAQUS, where a gear pair is subjected to a known torque at various rotational positions to include regions of single and double tooth contact.

It is shown that the introduction of misalignment usually has an effect on the system; however, substantial axial and yaw misalignment are required before non-negligible forces develop. It is also shown that pitch misalignment is the most influential with regard to the reaction moments and transmission error, whereas radial misalignment is more influential in the decomposition of the normal contact force into vertical and horizontal forces.
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Document Type: Research Article

Affiliations: 1 School of Engineering, University of Warwick, Coventry CV4 7AL, UK.

Publication date: August 1, 2011

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