EXPERIMENTAL STUDY OF MECHANICAL CHARACTERISTICS OF SUPPORT AND MOVEMENT OF CENTRIFUGE PICO21
DOI:
https://doi.org/10.20535/2305-9001.2013.69.28995Keywords:
Vibration, lab centrifuge, rotor, rubber supportAbstract
Purpose. Definition of laboratory centrifuge characteristic with regard to its structural features.
Design/methodology/approach. The dynamic characteristics of the centrifuge with design features that consist in fact that it is multimass system fixed on elastic support is determined. Contrast to the previous well-known approaches in which the centrifuge is seen as a single-mass construction and do not take into account the design features fixing is shown. Quality of work required depends on the centrifuge parameters. The dynamic behavior of a centrifuge depends on the stiffness and damping supports. To determine the stiffness of rubber supports used the method of perturbation forced vibrations using vibration stand, which allows to determine the dynamic characteristics of the supports in tension and shear.
Findings. Found that support in the first approximation can be considered linear elastic. The dependences of the natural frequencies of the frequency and direction of rotation of the centrifuge.
Originality/value. This research was important and original in field of vibrations of medical machines, which usually work with high values of frequencies. It shows changes of own frequencies depending on work frequencies. It can help to avoid a resonance during operation.
References
Babenko A., Lavrenko Ia., Strackeljan J.: Journal of Mechanical Engineering of the National Technical University of Ukraine “Kyiv Politechnic Institute”, 2011, no 61 T1, pp. 91–94.
Babenko A., Lavrenko Ia., Strackeljan J.: Journal of Mechanical Engineering of the National Technical University of Ukraine “Kyiv Politechnic Institute”, 2011, no 63, pp. 268 – 272.
Babenko A., Lavrenko Ia., Kurenkov M. Journal of Mechanical Engineering of the National Technical University of Ukraine “Kyiv Politechnic Institute”, 2013, no 65, pp. 166-174.
Fischer J., Strackeljan J.: Stability Analyses of High Speed lab centrifuges considering internal damping in rotor shafts, Technische Mechanik, Band 26, Heft 2, 2006, pp. 131-147.
Fischer J., Strackeljan J.: FEM-Simulation and stability analyses of high speed rotor systems. 7th IFToMM-Conference on Rotor Dynamics, Vienna, Austria, 2006.
