Actual technical condition assessment of mine excavators’ slewing gear based on the operating oil parameters

Abstract

Abstract During mining equipment operation, great attention should be paid to durability and reliability increase of their units and assemblies, since the greatest number of equipment failures in Kuzbass mines occurs precisely because of the failure of excavators’ slewing gears. Today this very problem is relevant for coal mining enterprises. One of the ways to improve the reliability of gears is the introduction of additional technological processes to diagnose the mechanisms actual technical condition of an excavator-automotive complex. However, the equipment and methods used do not fully meet the requirements for a comprehensive analysis of the technical condition of gears. Thus, there is a strong need to develop a modern technique to diagnose assemblies, based on the parameters of the operating oil. With the help of experimentally identified dependencies of the oil temperature in a gear on the parameters of the operating oil, a mathematical model of the wear process of slewing gears rubbing parts was obtained; the mathematical model has the possibility to predict possible failures of excavators. The introduction of this model in production will significantly reduce the downtime of mining equipment in coal mines; it also will affect the reduction of total costs of enterprises.