Loginova A.A., Dyrda V.I. Thermal aging of stressed massive rubber elements in mining machines

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Parent Category: Geo-Technical Mechanics, 2016

Category: Geo-Technical Mechanics, 2016, Issue 129

Geoteh. meh. 2016, 129, 217-229

THERMAL AGING OF STRESSED MASSIVE RUBBER ELEMENTS IN MINING MACHINES

¹Loginova A.A.,

¹State HEI “NMU”

¹Dyrda V.I.,

¹IGTM NAS of Ukraine

Abstract. A process of thermal aging of the stressed massive rubber elements in mining ma-chines is analyzed. An effect of different environments and operating conditions (pressure, tempera-ture, aggressive influence of the environment) on the rubber characteristics is described. Regulari-ties and dependences which define thermal aging of the rubber under static stress are explained. Basing on these dependencies, it is concluded that the thermal effect on the rubber elements in con-ditions of static stress leads to degradation of the rubber stiffness and decrement of the energy dissi-pation. This, in its turn, changes amplitude-frequency characteristics of the machines. The theoretical results are considered for applying in dynamics of the conveyor KV1T 0.15 with vibration isolators of the BP 201 type and inertial drive. The calculations show that, due to thermal aging of statically-stressed vibration isolators at constant oscillation frequency and force of inertia, the amplitude has decreased from 3 mm to 2.6 mm for 1.250 hours of observation.

Keywords: thermal aging of rubber, impact of aggressive environment on the rubber elements, oxidation reactions in the rubber.

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About the authors:

Loginova Anastasiia Aleksandrovna, Doctoral Student, State Higher Educational Institution “National Mining University” (SHEI “NMU”), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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

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