Вісник № 05
Постійне посилання колекціїhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/36176
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Документ Mechanical processes in the terminal parts of the turbogenerator stator imbricated core in the presence of the tooth area pressing defects(NTU "KhPI", 2018) Kuchynskyi, Kostiantyn Arturovich; Titko, Vladislav Olekseevich; Hutorova, Maryna Serhiyivna; Mystetskyi, Viktor AnatoliyovychA mathematical model and method of calculating the mechanical characteristics of the pressure in the slabs due to fluctuations in the tooth area pressing out was developed. The model implementation allowed identifying the characteristics of oscillatory processes in the mechanically connected "tooth-finger-plate" system in the presence of the turbogenerator stator core pressing defects in the tooth area, particularly with various defect degrees, namely bending of the different number of tooth supports and change in the tooth geometry upon its partial breakage. The vibrations in the fingers and plates at the site of contact were calculated, subject to occurrence of defects in pressing of the core tooth area (bending of the different number of fingers and change in the tooth geometry), as well as numerical values of the tooth vibration frequencies at the beginning of their sudden destruction. It was revealed that depending on the depth of the broken part, the tooth oscillation frequency changes, causing a decrease in the frequency of its transverse vibrations and a sharp increase in the oscillation amplitude, resulting in a growth of strain and stress. These processes greatly intensify the degree of tooth destruction. The emergence of certain vibration frequencies were revealed, which were observed in a relatively defect-free generator, which enables the further development of a method of diagnosing the state of the magnetic duct tooth areas.