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Г.А. Тимофеев, С.И. Красавин, П.Н. Сильченко
10
Инженерный журнал: наука и инновации
# 6·2017
Analysis of service life of electromechanical
drive gear mechanisms
© G.A. Timofeev
1
, S.I. Krasavin
1
, P.N. Silchenko
2
1
Bauman Moscow State Technical University, Moscow,105005, Russia
2
Siberian Federal University, Krasnoyarsk, 660041, Russia
Electromechanical drives with gear mechanisms (often reducers, rarely - multipliers) are
used in many space, aviation and defense facilities. In the process of long-term work
(more than 10 thousand hours) the gears gradually wear out, which ultimately leads to a
change in the teeth profiles, their dimensions and the appearance of increased gaps in
meshing. This results in a reduction in efficiency, reduced kinematic accuracy and tor-
sional rigidity of the drive, increased dynamic loads. The intensity of wear can vary over
a wide range of values, it depends on the type of conjugated surface contact interaction,
materials, environmental conditions, the nature of mechanical and chemical processes
occurring in the contact, the magnitude of the acting stresses, sliding speed and ambient
temperature. In friction at ordinary atmospheric conditions, films of oxides and adsorbed
substances are formed on the exposed wear (interacting) surfaces reducing the intensity
of wear, since being broken when sliding, they block the material destruction in a thin
surface layer. A technique is proposed for calculating the service life of the electrome-
chanical drive forehead gears by the wear criteria.
Keywords:
electromechanical drive, gear mechanism, wear of teeth, service life, efficien-
cy, kinematic accuracy, torsional stiffness
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