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Information × Registration Number 0223U000115, 0120U102004 , R & D reports Title Analysis of the influence of hydrodynamic forces acting in narrow clearances of seals and bearings on increasing energy efficiency and reducing the harmful emissions and vibrations of centrifugal machines. popup.stage_title Head Zahorulko Andrii V., Кандидат технічних наук Registration Date 03-01-2023 Organization Sumy State University popup.description2  As a result of the project implementation at the expense of computer modeling using the computational mechanics methods and experimental studies, the hydrodynamic forces acting in narrow clearances of annular, labyrinth, scallop, stuffing box, face fluid impulse seals and combined (hydrostatodynamic, with hydrodynamic unloading and rolling) bearings taking into account the deformation of materials and coatings were analyzed and their effect on increasing energy efficiency and reducing harmful emissions and vibrations of high-speed centrifugal machines that can be used in pump-compressor and turbine building and in aerospace engineering. Computational hydrodynamics methods were used to calculate the hydro-gas-dynamic and rotordynamic characteristics of seals and bearings, and the rotordynamic coefficients were obtained using the perturbation method. The design experiment method was used to analyze the effect of geometry on sealing, friction loses and dynamic characteristics. The problem of hydroelasticity for seals and bearings made of polymer materials was solved using the method of successive approximations. Flow rate, temperature and dynamic characteristics were obtained in experimental studies. Such a complex approach to calculation using computational methods and experiments allowed improving the existing designs of seals and bearings. New innovative solutions for multi-annular, scallop, stuffing box, face impulse seals and combined sliding bearings are proposed and investigated Product Description popup.authors Izemenko Vladyslav V. Borsuk Serhii A. Haponova Oksana P. Hudkov Serhii M. Zahorulko Andrii V. Mischenko Svitlana O. Pozovnyi Oleksandr O. Sapozhnykov Yaroslav I. Taran Ivan V. Tarelnyk Viacheslav B. popup.nrat_date 2023-01-03 Close