Authors: I.V. Kosarev, A.V. Meznikov, V.V. Kosarev, G.V. Andreev, E.M. Chaikov

Title of the article: Forced circulation lubrication system for highly loaded transmissions of the KDK 1000 cleaning combine

Year: 2025, Issue: 4, Pages: 22-36

Branch of knowledge: 2.8.8. Geotechnology, Mining machines (engineering)

Index UDK: 622.232.72

DOI: 10.26730/1816-4528-2025-4-22-36

Abstract: The article substantiates the need to find new ways to significantly increase the resource when creating the KDK1000 import-substituting combine harvester and, above all, its highly loaded cutting and feeding block transmissions. The technical characteristics, parameters and design features of the gearboxes of these blocks as resource-determining components of the combine are presented. The specifics of the operation of combine gearboxes in mine conditions are reflected and the analysis of factors affecting the service life of the gearboxes and the combine as a whole is performed. The necessity of switching to a forced circulating lubrication system is substantiated as one of the three main factors ensuring a significant increase in the service life and reliability of gearboxes. The main criteria affecting the durability of bearing assemblies and gears are reflected, methods for their calculation and evaluation of lubrication efficiency are presented. The necessity of forced water and fundamentally new water-air cooling of gearboxes and the lubricant supplied to them is substantiated, and new detailed technical solutions are presented in the implementation of this direction of increasing the resource and reliability of highly loaded transmissions of mining machines. Some results of bench tests of alloyed transmission oils in the composition of planetary cylindrical reducers of cutting blocks of the UKD200-400 cleaning combine are reflected. A number of patented and patented technical solutions are presented to improve the efficiency of the most advanced forced circulation lubrication system, its basic hydraulic scheme, and a preliminary calculation of the pumping unit's performance for sufficient heat extraction from transmissions. Innovative solutions for equipping combine harvester transmissions and their lubrication systems with protective equipment against dirt, dust and aggressive moisture from the external environment of the cleaning face are presented. A further set of measures is planned to improve transmissions and their lubrication systems to increase the service life and reliability of combine harvesters.

Key words: combine harvester planetary cylindrical gearbox cutting unit water-air ejector circulating lubrication system transmission alloyed oil extreme pressure additive viscosity of the lubricating fluid

Receiving date: 20.05.2025

Approval date: 30.06.2025

Publication date: 28.08.2025

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