Browsing by Author "Urbanský, Matej"

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    Nové prototypy pneumatických pružných hriadeľových spojok a ich očakávané vlastnosti
    (University of Žilina, 2025) Urbanský, Matej; Grega, Robert; Žuľová, Lucia; Krajňák, Jozef
    In our workplace, we deal with research of pneumatic flexible shaft couplings in the long term. Our main goal is to minimize dangerous torsional vibration in mechanical systems, using pneumatic flexible couplings as torsional vibration active tuners. Therefore, many pneumatic couplings prototypes have to be manufactured and tested. In this article, two new prototypes of pneumatic flexible shaft couplings and their expected properties are presented. The couplings were manufactured according to granted patents.
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    Pneumatické pružné hriadeľové spojky v pohonoch mechanických sústav
    (University of Žilina, 2024) Kaššay, Peter; Urbanský, Matej
    The article presents a newly developed pneumatic flexible shaft coupling with hose flexible element usable, among other applications, in drives of mechanical systems. The presented coupling uses a hose-shaped flexible element winding between the supporting surfaces of coupling’s driving and driven hub. As the torque transfer is ensured with compressed air, the torsional stiffness of coupling can be adapted to actual operating parameters (rotational speed) with change or air pressure inside the flexible elements. This makes the presented coupling suitable for semi-active torsional vibration control. A patent was also granted for the presented coupling design. The design of hose-shaped element enables reliable sealing of compression volume and it is also easy to assembly and dismantle.
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    Vyladenie mechanickej sústavy pohonu piestového kompresora z hľadiska veľkosti torzného kmitania
    (University of Žilina, 2024) Urbanský, Matej; Kaššay, Peter
    One of possible ways to change the amount of compressed air delivered by a piston compressor is to change its operating speed. However, it can cause an improper tuning of the mechanical system of piston compressor drive in terms of torsional dynamics. In order to avoid excessive torsional vibration, a suitable pneumatic flexible shaft coupling can be used in the system. An optimum air pressure value in a pneumatic coupling was determined experimentally for three various operating modes of an experimental mechanical system of piston compressor drive.