Browsing by Author "Nishchenko, Iryna"

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    Substantiation of the process of vertical transportation of piece loads
    (Lviv Politechnic Publishing House, 2017-01-01) Nishchenko, Iryna; Borovets, Volodymyr; Lviv National Agrarian University, Dubliany, Ukraine; National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine; Lviv Polytechnic National University, Lviv, Ukraine
    The urgent problem of automatization of the process of products transportation with a help of vertical chutes under the influence of gravitational forces using elastic elements is considered. The interaction between the object being transported and the elastic elements is defined. Their mutual influence on the transportation speed is determined depending on the contact parameters. The analysis of the object transportation speed changing depending on friction and on the zone of their mutual contact is carried out.
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    Two-mass vibrating conveyer with nonparallel flat springs
    (Publishing House of Lviv Polytechnic National University, 2016) Koruniak, Petro; Nishchenko, Iryna; Shenbor, Vladyslav; Korendiy, Vitaliy
    The analysis of operation of vibrating conveyers with nonparallel placement of flat springs is carried out. The motion of mechanical oscillating system is investigated. The structure of the supporting unit for flat springs fastening is propounded. This structure allows simplifying of setting-up of two-mass vibrating conveyers with the aim to ensure the effective operation. The models of conveyers with nonparallel placement of springs, providing the accurate calculations of rigidities and angles of flat springs inclinations, considerably simplify the structures of conveyers and their setting-up to ensure the prescribed angles of vibrations. The proposed structure of fastening of flat springs ends allows increasing of operation efficiency of the two-mass vibrating conveyer. Due to such setting-up of the equipment it is possible to compensate some of its theoretical and structural faults. On the basis of presented investigations, it is planned to develop the three-mass models of conveyers-separators with transporting of separated components in different directions.