RESEARCHING RELIABILITY OF WORK OF GRAIN HARVESTERS’ TRANSPORT SYSTEMS ELEMENTS

Abstract

The article is presented as a systemic analysis of the reasons for failures and the provision of practical scientifically grounded proposals to improve the reliability of grain transport lines of mod-ern combine harvesters. The authors analyzed the main factors and causes that lead to premature failure and destruction of the elements of combine harvesters’ grain-transport line. The object of the study were the physical phenomena that occur in the upper part of the grain and tailings elevators of the grain transport group of combine harvesters during grain transportation. The work of coupling was investigated and analyzed in detail: the working surface of the drive sprocket – the chain with scrapers of the grain and tailings combine elevator. The main reasons for the destruction of the drive sprocket teeth and accelerated wear of the chain with scrapers of grain combine elevator: abrasive wear, contact wear, plastic deformation, corrosion wear, etc. were determined. The following scientif-ically substantiated and practical recommendations were proposed: conducting systemic diagnost ic examination of the components of grain transport group; reducing the intervals between combine maintenance in case of work under difficult conditions of harvesting; the possibility of mirror instal-lation of a partially worn out drive sprocket by 1800 turning; thorough cleaning the working bodies of combine harvester transport systems from plant residues and mud during maintenance and sto rage; using new construction materials, including composites, for the manufacture of new drive sprockets of the chain with scrapers of elevators of the combine harvesters’ transport group. The offered advice and recommendations on the chosen research subject are expedient at using the existing constructions and designing new elements of grain transport lines of modern grain harvesters produced in Ukraine and abroad. Also, the results of the presented study should be introduced into the educational process while training students in specialties 208 Agro-engineering and 133 Industry mechanical engineering.