The Use of Cold Spraying and Micro-Arc Oxidation Techniques for the Repairing and Wear Resistance Improvement of Motor Electric Bearing Shields

Yury Kuznetsov, Igor Kravchenko, Dmitry Gerashchenkov, Mikhail Markov, Vadim Davydov, Anna Mozhayko, Valentin Dudkin and Alina Bykova
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Yury Kuznetsov: Department of Reliability and Repair of Machines, Faculty of Agricultural Engineering and Energy Supply, Orel State Agrarian University Named after N.V. Parakhin, 302019 Orel, Russia
Igor Kravchenko: Department of Technical Service of Machines and Equipment, Russian State Agrarian University—Moscow Timiryazev Agricultural Academy (RSAU—MTAA), 127550 Moscow, Russia
Dmitry Gerashchenkov: NRC “Kurchatov Institute”—CRISM “Prometey”, 191015 St. Petersburg, Russia
Mikhail Markov: NRC “Kurchatov Institute”—CRISM “Prometey”, 191015 St. Petersburg, Russia
Vadim Davydov: Higher School of Applied Physics and Space Technologies, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
Anna Mozhayko: Higher School of Applied Physics and Space Technologies, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
Valentin Dudkin: Department of Photonics and Communication Lines, Faculty of Infocommunication Networks and Systems, The Bonch-Bruevich St. Petersburg State University of Telecommunication, 193232 St. Petersburg, Russia
Alina Bykova: NRC “Kurchatov Institute”—CRISM “Prometey”, 191015 St. Petersburg, Russia

Energies, 2022, vol. 15, issue 3, 1-12

Abstract: Reliability is one of the most important requirements for electric motor installations. Bearing assembly is a common source of failure for most electric motors. One of the main reasons for such failures is the wear of the bearing seat of the end shield. This paper presents a combined technology for increasing the durability of the bearing bores of electric motor bearing shields made of aluminum alloys. The technological concept is that a worn-out end-shield bore is firstly restored by supersonic gas-dynamic spraying, and secondly, in order to improve anti-wear properties, it is strengthened by micro-arc oxidation. The adhesion of coatings has been studied, and the wear resistance of the formed coatings has been evaluated. Based on the performed studies, it can be assumed that the service life of the bearing assembly of an electric motor restored by gas-dynamic spraying with the novel technology of micro-arc oxidation in real operating conditions will increase on average by 3–4 times. The developed technology is recommended for repair, maintenance, or other technical services dealing with the restoration and hardening of worn-out parts.

Keywords: gas-dynamic spraying; micro-arc oxidation; technology; electric motor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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