Ship Power Plants                                                                                            
DOI: http://www.dx.doi.org/10.24866/2227-6858/2019-4-8

Portnova O., Gribinichenko M., Mashtalyar D., Nadaraia K., Filonina V.

OLESYA PORTNOVA, Senior Lecture, AuthorID: 923140, SPIN: 7989-1406, 
ResercherID: G-4660-2017, e-mail: olesya.portnova@mail.ru 
MATVEI GRIBINICHENKO, Candidate of Engineering Sciences, Associate Professor, 
Head of Department, AuthorID: 639456, SPIN: 8038-4960, 
e-mail: gribinichenko.mv@dvfu.ru 
Department of the Ship's Power and Automation Department, School of Engineering 
Far Eastern Federal University 
8 Sukhanova St., Vladivostok, Russia, 690091
DMITRY MASHTALYAR, Candidate of Engineering Sciences, Associate Professor, 
AuthorID: 199474, SPIN: 5930-2987, ORCID: 0000-0001-9645-4936, 
ResercherID: A-5314-2014, ScopusID: 6504093612, e-mail: madiva@inbox.ru
VALERIA FILONINA, Master Student, Junior Researcher, e-mail: filonina.vs@gmail.com
KONSTANTINE NADARAIA, Candidate of Chemical Sciences, Senior Researcher, 
AuthorID: 741709, SPIN: 7856-2069, ORCID: 0000-0001-7835-2231, 
ResercherID: D-8392-2014, ScopusID: 56349269900, e-mail: nadaraiakv@mail.ru
Institute of Chemistry, FEB RAS 
159, Stoletiya Vladivostoka Av., Vladivostok, Russia, 690022 Abstract: The problems of increasing the resource and reliability of axial beari

Physical experiment to study the tribological characteristics
of composite antifriction coatings
of gas bearings operating  in the dry friction mode

Abstract: The problems of increasing the resource and reliability of axial bearings with gas lubrication by reducing the negative impact of dry friction on the condition of the working surfaces of the bearing are considered. The authors have selected a protective antifriction coating obtained by plasma electrolytic oxidation (PEO) and conducted a physical experiment to study the tribological characteristics of antifriction coatings. The authors analyzed the results of the experiment to find out the possibility of using PEO coatings for axial gas supports. The empirical coefficients were obtained to determine the wear of the coating and the friction moment. The analysis is based on the study of the friction moment and wear rate at low bearing speeds. To illustrate the findings, some experimental results are presented in graphical form: the dependences of the friction moment arising from direct contact of the axial bearing working surfaces and the wear rate on the outer radius are shown. Based on the results of the experiments, a method for calculating and optimizing the parameters of the gas supports of the rotors of ship turbomachines operating under dry friction and gas lubrication modes is proposed. The methodology includes the calculation and optimization of the shape of the lubricating gap and the calculation of the tribological characteristics of the selected protective coating.
Keywords: gas lubrication, physical experiment, dry friction, plasma electrolytic oxidation, axial bearing, empirical coefficients.

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