ESTIMATION OF A CENTRIFUGE ROTOR STRENGTH AND ANALYSIS OF THE INFLUENCE OF CONSTRUCTIVE AND TECHNOLOGICAL PARAMETERS

Abstract

The constructive strength of the centrifuge cup is investigated. The main parts of the study are the stress-strain state of the cup, which is determined by its design features and influence on the strength of its cups fabrication method. The results of numerical simulation of the stress-strain state and the results of micro-and macro-structural analysis were used to assess the effect of fabrication method. Most constructive elements of modern machines and mechanisms operating at variable loading, which cause vibrations. Fluctuations cause occurrence of cyclic stress that is the reason of damage and destruction as a result of fatigue especially in the case of resonance or other transitional regimes. Also critical stresses and fatigue limit strongly depend on structural and technological factors. Construction of modern tools and machines developed in the direction of increasing power and high speed while reducing weight. In connection with this increased dynamic loads, respectively, and the vibration influence on machines, tools and their parts. The most influential structural factors actually are a stress concentration and component dimensions. To technological parameters include the structure of the material, which depends on its production. High speed centrifuges are often designed as universal devices where one motor drives a wide range of different rotors. Centrifuges are used for the separation of mixtures of different densities.