20.500.12556/RUL-191236 Razvoj vodno-hidravličnega visokotlačnega pretvornika za tlake do 1000 MPa Development of a water-hydraulic high-pressure converter for pressure up to 1000 MPa Zaključno delo obravnava razvoj visokotlačnega pretvornika za vodo, ki povečajo tlak do 1000 MPa. Za celovito obravnavo delovanja naprave so bili teoretično preverjeni mnogi podsklopi naprave. Želeli smo opisati vrste obremenitev ki se pojavijo kot posledica visokega delovnega tlaka in prilagajati konstrukcijsko zasnovo naprave dokler ne uskladimo izbranih materialov in njihovih mehanskih lastnosti z obremenitvami. Nastanek previsokih primerjalnih napetosti na površini notranje stene smo rešili z oplaščenjem, kjer zunanji plašč povzroča kontaktni tlak na zunanjo površino visokotlačnega valja. Krogelni protipovratni ventil ki nalega na krožno sedišče je bil izbran kot najbolj zanesljiv pristop preprečevanja povratnega toka. Izkazalo se je, da stisljivost vode pri kompresiji na željeni tlak ni zanemarljiva (-20 %), zanemarljivo pa je segrevanje zaradi opravljenega dela kompresije. Za material glavnega tesnila je bil izbran politetrafloretilen, ki povzroča visoko trenje, v režimu suhega trenja. V predvidenem režimu obratovanja je za dosego obratovalnega tlaka pri batnici premera ⌀ 26 mm potrebno osno tlačno silo 531 kN, v kombinaciji s predvidenim vzmetnim prednapetjem tesnila in trenjem kot posledice pozitivne povratne zanke naraste zahtevana osna sila na 788 kN. Izkazalo se je, da eksperimentalno nadaljevanje z izdelavo prototipa ni smiselno dokler vsi teoretični izzivi konstruiranja niso rešeni, predvsem nosilnost in obremenitve podpornega obroča tesnila. The final work concerns the development of a high-pressure water converter operating at a pressure of 1000 MPa. For a comprehensive assessment of the device’s operation, many subassemblies were theoretically verified. We aimed to describe the types of loads that occur as a result of the high operating pressure and to refine the virtual design of the device until the selected materials and their mechanical properties matched these loads. Excessive equivalent stresses on the surface of the inner wall were effectively reduced by cladding, where the outer cladding generates contact pressure on the outer surface of the high-pressure cylinder. A ball check valve resting on a radial seat was selected as the most reliable solution for preventing backflow. It was found that the volumetric compressibility of water when compressed to the desired pressure is not negligible (−20%), while the heating due to the work of compression is negligible. Polytetrafluoroethylene was selected as the material for the main seal, and we found that it causes high friction in the dry friction/sliding regime. In the intended operating mode, an axial compressive force of 531 kN is required to achieve the operating pressure with a piston rod of diameter ⌀ 26 mm. In combination with the intended spring preload of the seal and friction as a result of the positive feedback loop, the required axial force increases to 788 kN. It turned out that continuing the experiment with a physical prototype does not make sense until all theoretical design challenges have been solved, particularly those relating to the load capacity and loading of the seal support ring. vodna hidravlika hidravlični ojačevalniki konstruiranje trenje politetrafloroetilena stisljivost vode protipovratni ventili water hydraulics hydraulic intensifier design friction of polytetrafluoroethylene compressibility of water ball check valve true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-11-12 15:41:35 2026-11-12 15:41:44 2026-11-13 04:01:58 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 296875 51305.pdf 51305.pdf 1 3D7FEC812E2EB8BAB103A2C42C70CCE9 ed06f45baedd29bdb0a0ea5855498fc10de2058c08ee9a652c1c616814848d73 11a9953b-dea7-11f1-aea2-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=253250 Fakulteta za strojništvo 0 0 0