Dynamic sensitivity of planet load sharing to errors in planetary gearboxes


Minimizing the unbalanced load sharing of the input torque of planetary gearboxes in presence of the manufacturing errors is important in order to improve the load capacity and stability of gearboxes; for this purpose, sensitivity of the planet load sharing coefficient to the positioning error of the planets in planetary gearboxes are investigated in this study.

A 2D nonlinear lumped mass model of a single stage spur planetary gear system is used to analyse the influence of the tangential error of planet pinhole position on the load sharing inside gearboxes. Nonlinear effect of backlash, tooth profile error and planet positioning error are taken into account in this model besides the effect of variation of mesh stiffnesses between the mating gears.