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ArticleName Innovative technologies for renewal of hydraulic drive units of mining machines
DOI 10.17580/gzh.2015.05.15
ArticleAuthor Ostrovsky M. S., Tulinov A. B.

Author 1:
Name & Surname: Ostrovsky M. S.
Company: College of Mining, National University of Science and Technology—MISiS (Moscow, Russia)
Work Position: Professor
Scientific Degree: Doctor of Engineering Sciences

Author 2:
Name & Surname: Tulinov A. B.
Company: Russian National University of Tourism and Service (Moscow, Russia)
Work Position: Professor
Scientific Degree: Doctor of Engineering Sciences


Mining, construction and other industries increasingly operate machinery with hydraulic drives. Having stated this fact, the authors emphasize the problem connected with reliability, wearability and maintenance ability of basic units of hydraulic drives, in particular, friction pairs (piston–barrel) of hydraulic piston pumps, and describe modern technologies of manufacture and renewal of such units based on using special hardening anti-friction epoxy coatings (AEC) as a space filler between rubbing metal surfaces. Physico-mechanical properties and functional specifications of modern domestic and foreign composites are presented. Besides, the article shows various schemes of surface tooling and technologies of applying anti-friction composites on the surface of hydraulic drive units during manufacture or renewal. The authors describe a new-developed composite with high dispersion ceramic additives, the mechanical and tribochemical properties of which are equal with the properties of the best foreign analogs. By the authors’ data, AEC application on rubbing surfaces of hydraulic drives, metal-cutting equipment and other type friction pairs 10–15 times increases their wearability, elevates the rubbing surface condition by 1–2 classes and totally improves the quality of the units.

keywords Hydraulic drives of machines, hydraulic pump, piston–barrel, wear, defects, anti-friction epoxy materials, tooling and coating of rubbing surfaces, manufacture and renewal

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