20.500.12556/RUL-169099 Vpliv čistoče olja na trajnost delovanja hidravličnega potnega ventila Impact of oil cleanliness on sustainability of hydraulic directional control valve Hidravlični sistemi so zelo pogosti v industriji in ostalih tehničnih področjih. Za krmiljenje se najpogosteje uporabljajo drsniški potni ventili, ki pa na krmilnih batih nimajo tesnil. To povzroča notranje puščanje. Stabilnost puščanja je zelo odvisna od čistoče hidravlične tekočine. Raziskava obravnava vpliv čistoče hidravličnega olja na trajnost in notranje puščanje obravnavanega drsniškega potnega ventila. V okviru raziskave je bilo zasnovano in sestavljeno hidravlično preizkuševališče, na katerem smo izvedli tri trajnostne teste hidravličnega 4/3-potnega ventila. Pri posameznem testu smo v hidravlično olje dodali različno količino testnega prahu MTD, ki je priporočen za izvedbo pospešenega testiranja. Ventil smo preklapljali s frekvenco 4 Hz do doseženih 2 milijona ciklov. Na ventilu smo merili notranje puščanje voda A in B s pomočjo dveh merilnih valjev in štoparice. To je ob povečanju količine testnega praha vidno naraščalo. Po izvedenih testih smo prerezali ohišja in pogledali obrabo drsnih površin ohišij in batov testiranih ventilov Hydraulic systems are very common in industry and other technical fields. The most frequently used valves for control are sliding directional control valves, which do not have seals on the control pistons. This causes internal leakage. The stability of the leakage is highly dependent on the purity of the hydraulic fluid. The thesis deals with the influence of the purity of the hydraulic oil on the durability and volumetric efficiency of the sliding directional control valve under consideration. As part of the thesis, a hydraulic test rig was designed and assembled, on which three durability tests of a hydraulic 4/3 directional control valve were performed. For each test, a different amount of MTD test powder recommended for accelerated testing was added to the hydraulic oil. The valve was switched at a frequency of 4 Hz until 2 million cycles were reached. At the valve, the internal leakage of the A and B lines was measured using two measuring cylinders and a stopwatch. The leakage increased visibly with an increase in the amount of test dust. After the tests were carried out, the casings were cut open and the sliding surfaces of the casings and pistons of the tested valves were inspected for wear. hidravlika čistoča olja preizkuševališča potni ventili trajnostni testi testni prah obraba drsnih površin hydraulics oil cleanliness testing ground directional control valves sustainability tests medium test dust wear of valve sliding surfaces true false true Slovenski jezik Angleški jezik Članek v reviji 2025-05-12 10:24:16 2025-05-12 10:24:17 2025-05-13 04:01:26 0000-00-00 00:00:00 2023 0 0 Str. 96-104 št. 2 Letn. 29 apr. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.22:539.92(497.4) 1318-7279 151716867 Barbis_..._-Vpliv_cistoce.pdf Barbis_..._-Vpliv_cistoce.pdf 1 75E8A40A25A56CCB5B4C5078BAFF9AA8 40a92f503aeaebd55317cd143cadaf68f096cc17c416ce9a243f9e9ad50c8bf7 e38e03a2-2f09-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=210255 https://revija-ventil.si/vpliv-cistoce-olja-na-trajnost-delovanja-hidravlicnega-potnega-ventila/ 0 ee429a3a-2f09-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=210256 Fakulteta za strojništvo 0 0 0