Authors: A.V. Kudrevatykh, A.S. Ashcheulov, Ashcheulova

Title of the article: Method to determin the actual technical condition of the rotary gear of open cast excavators

Year: 2019, Issue: 3, Pages: 24-29

Branch of knowledge: 05.02.11 Methods of control and diagnostics in mechanical engineering

Index UDK: 622.271.4: 621.879:62-587.5

DOI: 10.26730/1999-4125-2019-3-24-29

Abstract: Russia takes the 5th place in the world in coal production and the 3d in exports. More than half of coal in Russia is mined in Kuzbass: 59% of bituminous coal and 77% of coking coal (according to 2018 data). The main method of coal mining in Russia is surface mining, 75% of coal is mined by surface method, as it is more cost-effective than the underground method more than in two times. Due to the constant increase in coal production in Russia, over the past five years the average annual growth rate is 105%, so the urgent issue is cost reduction. One of the ways to reduce costs may be the introduction of new ways to improve the reliability of components and units of mining equipment. By means of the conducted research, it was found out that the greatest down time is due to mechanical failures of buckets and gearboxes. In this paper, a fundamentally new approach to carry out in-place diagnostics of the actual technical condition of gearboxes based on the ‘mechanism-oil’ system is proposed. Using correlation-regression analysis of experimental data, the dependence of oil temperature on oil service hours has been obtained, the use of which allows without analyzing the gear on the basis of the temperature sensor readings to predict the concentration of mechanical impurities and to detect the pre-failure condition of a gear, which will prevent down time of equipment.

Key words: oil gearbox diagnostics excavator reliabilit

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