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Information × Registration Number 0225U000102, (0123U101853) , R & D reports Title Increasing the bearing capacity, sealing and dynamic stability of rotor systems of turbomachines popup.stage_title Дослідження запірних ущільнювальних та розвантажувальних систем турбомашин Head Zahorulko Andrii V., Кандидат технічних наук Registration Date 05-01-2025 Organization Sumy State University popup.description1 Establishing the general laws of the influence of the geometry of designs on the bearing capacity, leakage rate and rotordynamic characteristics of seals-bearings using computer modeling and its verification with the results of existing experimental studies popup.description2  An analytical calculation method has been developed that describes the radial-axial oscillations of the buffer equalizing device of the steam boiler centrifugal pump. The influence of large eccentricity and shaft whirl in the radial direction and harmonic oscillations in the axial directions are taken into account. The static and dynamic stability of the buffer bearing-sealing systems was analyzed. Thermohydrodynamic analysis of a buffer impulse dry gas seal with a continuous supply was performed with the help of modeling by computational fluid dynamic methods. The influence of thermal and force deformations of the rings and dynamic coefficients of stiffness and damping on the efficiency of the buffer impulse seal is determined. The results of the dynamic calculation of the impulse gas seal based on the numerical solution of the unsteady Reynolds equation for lubrication and the dynamics of the stator ring movement were obtained. The data obtained from the analysis of the structure-forming characteristics of the surface layers of carbon steel after electrospark alloying (ESA), nitriding and nitrocementing using special technological environments (STE). It was determined that coating by the electrospark alloying method can be effectively applied to the rings of buffer bearing-sealing systems made of inexpensive steel materials, providing the necessary roughness and wear resistance of the surfaces of the friction pair Product Description popup.authors Izemenko Vladyslav V. Vanzhula Arthur Yu. Hudkov Serhii M. Zahorulko Andrii V. Zahorulko Yuliia V. Mischenko Svitlana O. Pozovnyi Oleksandr O. Rosliakov Mykhailo Yu. Savchenko Yevhen M. Sapozhnykov Yaroslav I. Tarelnyk Viacheslav B. popup.nrat_date 2025-01-05 Close