Authors: M.Yu. Drygin, N.P. Kuryshkin

Title of the article: Extention of the domestic excavators gearbox service using methods non-destructive test

Year: 2020, Issue: 1, Pages: 20-28

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

Index UDK: 006.9

DOI: 10.26730/1999-4125-2020-1-20-28

Abstract: The efficiency of the main technological coal mining machines that is excavators is largely determined by the reliability of the gearboxes. Under these conditions, a system of scheduled preventive repairs, including preventive monitoring of the performance of gearboxes, scheduled maintenance and repairs using non-destructive testing (ND) methods is of particular importance. Production experiments and observations which have been carried out over seven years at the open pits of Kuzbass and Krasnoyarsk Region made it possible to develop a method for conducting non-destructive testing of gearboxes. It was found that 98.9% of gearbox defects are detected by visual measuring control, while the remaining 1.1% are detected by penetrating substances. The introduction of the category of “conditionally unacceptable” defects allowed 47% of gears with unacceptable defects to be transferred to this category. Observations showed that gears with such defects performed their functions from one to six years. The savings in the repair fund for the replacement of only one such gear amounted to at least 2 million rubles.

Key words: Excavator gearbox gearing defect non-destructive testing pitting excessive wear visual measurement control

Receiving date: 19.03.2020

Publication date: 11.06.2020

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