Determination of the durability of rubber vibration isolators of the support unit of the working body of shock-centrifugal disintegrators at aging in aggressive environment conditions

Loginova A.A.

Authors:

Loginova A.A., M.S. (Tech.) (IGTM NAS of Ukraine)

UDC 622.23.05

Language: Russian

Abstract.

The interdependence between the changed physical and mechanical characteristics of the elastic-damping elements of the support unit, time factor and aggressive environment, on the one hand, and rotor shaft vibrations in the shock-centrifugal disintegrators (SCD), on the other hand, is considered. An algorithm was created for determining operating parameters of the SCD as a dynamic system. In particular, the SCD amplitude-frequency characteristic is determined with taking into account rheological parameters of rubber vibration isolators with a quantitative determination of their dynamic rigidity and dissipation coefficient under the given operating conditions.

Based on the strict mathematical concepts, the key criterion – dissipation coefficient – is described, which determines durability of rubber vibration isolators in the SCD support unit. With the help of this criterion, an expression was formulated, which determines durability of the rubber elements operating under the action of acid corrosive environment. The resulting expression, which determines the durability index of the vibration isolation system, was set up on the basis of rheological parameters of the rubber, the maximum permissible vibration amplitude of the dynamic system, frequency of the disturbing force and the frequency of natural oscillations.

Keywords:

rubber assemblies and parts, durability of elastomers, acid aggressive environment, elastic-dissipative properties of rubber, aging of elastomers

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About the authors:

Loginova Anastasiia Aleksandrovna, Master of Science, first category engineer of Department of Mechanics of Mineral Processing Machines and Processes, M.S. Polyakov Institute of Geotechnical Mechanics under the 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.