Influencia de los errores de fabricación en el comportamiento de un tren de engranajes planetarios de dos etapas

Influence of manufacturing errors on the behaviour of a two-stage planetary gear train

Abstract

Planetary gear train is widely used in large heavy-duty

machineries such as helicopters and ships due to its large

transmission ratio, strong bearing capacity, and small size.

In this paper, and the load sharing ratio (LSR) and overall

transmission error (TE) of a two-stage double-helical planetary

gear train are studied. Firstly, the static balance equations of

the double-helical planetary gear train are established. Then,

the LSR under different mesh phasing and the overall TE are

obtained by solving the equations. Finally, different errors

such as pinhole position and eccentricity error are taken into

consideration and the influence of errors on load sharing ratio

and transmission error are analyzed. The results show that

the excitation frequency of transmission error is related to

the number of planet gears and mesh phasing and the LSR

is related to the mesh phasing, especially to the sequentially

phased transmission. It is also concluded that the excitation

frequency of the output element of the two stages can be seen

as the superposition of the mesh frequencies of each stage and

that the studied errors have a significant impact on the LSR

and the TE.