Dyrda V.I., Lisitsa N.I., Kalgankov Ye.V., Tsanidy I.N., Cherniy A.А., Agaltsov G.N. Some peculiarities of experimental studies of rubber lining in heavy-duty machines

Details

Parent Category: Geo-Technical Mechanics, 2018

Category: Collection of scientific papers «Geotekhnicheskaya Mekhanika» Issue 138

Geoteh. meh. 2018, 138, 150-159

DOI: https://doi.org/10.15407/geotm2018.01.150

Some peculiarities of experimental studies of rubber lining in heavy-duty machines

Dyrda V.I., Lisitsa N.I., Kalgankov Ye.V., Tsanidy I.N., Cherniy A.А., Agaltsov G.N.

Authors:

Dyrda V.I., Dr. Tech. sciences, professor (IGTM NAS of Ukraine)

Lisitsa N.I, Ph.D. Sciences, Senior Researcher (IGTM NAS of Ukraine)

Tsanidi I.N., graduate student (IGTM NAS of Ukraine)

Kalgankov E.V, Post-Graduate Student (IGTM NAS of Ukraine)

Cherniy A.A., graduate student (IGTM NAS of Ukraine)

Agaltsov G.N., Engineer, Junior Researcher (IGTM NAS of Ukraine)

UDC 678.4.06:621.81

Language:Russian

Abstract.

The authors consider specificity of experimental studies of rubber linings in machines operating under extreme conditions, i.e. long-term cyclic and shock loads, high temperatures and aggressive environments. Such heavy-duty machines include vibrating feeders, vibrating screens, ore-grinding mills, etc. Researchers of rubber lining in these machines face with difficulties while modeling technological processes, and, consequently, creating simulation models. Difficulties also arise due to absence of special experimental tool for studying such poorly studied processes as abrasion and fatigue wear of rubber, temperature of heating and mechanism of rubber destruction in zones contacting with counterbody, etc.

Results of investigations of thermal radiation in rubbers at their abrasive wear and shock loads are presented. It is shown that during abrasive wear (indentation of an acute indenter into a rubber massif), rise of temperature does not exceed indoor temperature (24-25) °С, and duration of cooling of the heated contact zone is (0.6-0.7) s; for shock loads, the temperature fixed in the contact zone was (7-9) °C.

Results of experimental studies of rubber lining under the influence of an aggressive medium are presented (content of Na₂O was 240 g/l, and ambient temperature was 100 °C). After about 4 thousand hours of operation, physical and mechanical characteristics of rubber changed: shear modulus increased by (10-12) %, dissipation coefficient decreased by (25-30) %, abrasion resistance decreased by 40 %, and fractal dimension of the rubber surface also changed. It is noted that fractal analysis of working surface of the rubber lining is effective for estimating changes of physical and mechanical characteristics of the material and its structure in the course of time. The analysis also confirms that process of rubber destruction in case of abrasive fatigue wear is nonlinear, especially in case with catastrophic forms of destruction when high temperature and aggressive environment (impact, indentation of counterbodies) act along with mechanical effects.

Action of fullerene on the properties of rubbers was also investigated. The following results were obtained: hardness of rubber decreased by (15-20) %, dissipation coefficient increased by (30-36) %, and abrasion of rubbers decreased by 15 %.

Findings of extensive experimental studies of the rubber wear resistance are also presented; data on effect of fullerene additives, aggressive media, service life, etc. on the wear resistance were obtained.

Keywords:

abrasion-fatigue wear, wear resistance, rubber lining, fullerene.

References:

1. Dyrda, V.I., Zozulya, R.P. (et al.) (2016), Rezinovyye futerovki tekhnologicheskikh mashin [Rubber lining of technological machines], Zhurfond, Dnepropetrovsk, Ukraine.

2. Bulat, A.F., Dyrda, V.I., Zviagilskii, E.L. and Kobets, A.S. (2012), Prikladnayamekhanikauprugo-nasledstvennykhsred. Tom 2. Metody rascheta elastomernykh detalei [Applied mechanics of elastic-hereditary media. Vol. 2. Design techniques of elastomeric parts], Naukova dumka, Kiev, Ukraine.

3. Shchelokova, M.A., Korotunova, E.V. and Mastinovskii, Yu.V. (2005), “Fractal approach to solving the problem of accumulation of damages”, Novi materialy i tekhnolohiyi v metalurhiyi ta mashynobuduvanni, no. 2, Zaporizhzhia, Ukraine.

4. Leontieva, M.A., Cleimenova, N.L. and Igumenova, T.I. (2016), “Improving the quality of car tires based on nanocarbon”, Mezhdunarodnyi studencheskii nauchnyi vestneyk, no 3, pp. 135‑136.

5. Igumenova, G.V. and Popov, G.V. (2008), “Investigation of the structure and properties of polymers reinforced with nanomaterials”, Materialy mezhdunarodnogo foruma po nanotekhnologiiam 3-5 dekabria 2008 g. Moscow, RF.

6. Dyrda, V.I. (1988), Prochnost i razrusheniye elastomernykh konstruktsiy v ekstremalnykh usloviyakh [Strength and destruction of elastomeric structures in extreme conditions], Naukova dumka, Kiev, USSR.

About the authors

Dyrda Vitaly Illarionovich, Doctor of Technical Sciences (D. Sc.), Professor, Head of Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Science of Ukraine (IGTM NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Lisitsa Nikolay Ivanovich, Candidate of Technical Sciences (Ph. D.), Senior Researcher, Senior Researcher in Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Science of Ukraine (IGTM NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Tsanidy Ivan Nikolaevich,Ph. D. Student in Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Science of Ukraine (IGTM NASU), Dnipro, Ukraine

Kalgankov Yevgeniy Vasilievich,Ph. D. Student in Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Science of Ukraine (IGTM NASU), Dnipro, Ukraine

Cherniy Alexandr Anatolyevich, Ph. D. Student in Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Science of Ukraine (IGTM NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Agaltsov Gennady Nikolaevich, Master of Science, Junior Researcher of Department of Elastomeric Component Mechanics in Mining Machines, Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Science of Ukraine (IGTM NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

• < Prev
• Next >