20.500.12556/RUL-119102 Razvoj kombiniranega hidravličnega protipovratnega in zavornega ventila Development of a combined hydraulic ceheck and brake valve Problematika posedanja bremen in sunkovitih gibov je v hidravliki stalni problem. Zato smo v sklopu zaključne naloge razvili in testirali nov KPPV, s katerim bi lahko odpravili problematiko posedanja, hkrati pa podaljšali čas pospeševanja ob začetku dviganja bremena. Potrebno je bilo na novo zasnovati in izdelati celotni ventil, preoblikovati in prilagoditi sestavne dele, da smo dosegli čim lažjo izdelavo ter ohranili preprostost ventila in uporabili čim več standardnih komponent. Z meritvami smo dokazali, da smo razvili dobro delujoč ventil, ki nam omogoča počasnejše speljevanje bremena ob začetku dviganja in ob pravilni izdelavi komponent odpravi problematiko posedanja bremena. Z različnimi vgradnjami zaslonk in malih protipovratnih ventilov ter zamenjavo vzmeti v ventilu lahko spreminjamo njegove karakteristike in odzivnost ventila, brez da spreminjamo njegove izdelane sestavne dele. Problems with load carrying and fast movements are constant problems in hydraulics. As part of our diploma thesis, we developed and tested a new combined hydraulic check and brake valve, which enabled us to eliminate load pickup and increase the acceleration time at the beginning of lifting loads. We had to rebuild and remanufacture the valve and adapt some parts, so that we simplified the manufacturing process of the valve and could use as many standard parts as possible. Tests have proven that we have developed a good and functional valve with longer acceleration times at the beginning of lifting loads, and with the precision manufacturing we can almost eliminate the load support as there is almost no leakage. With different orifices and small check valves and different springs we can change the characteristics of the valve without changing its main components. hidravlika protipovratni ventil zavorni ventil držanje bremena posedanje notranje puščanje pospeševanje bremena zaustavitev bremena hydraulics valve check valve brake valve holding load lowering leakage load acceleration load deceleration true false false [R. Krivec] Slovenski jezik Angleški jezik Zaključna naloga 2020-09-03 08:30:39 2020-09-03 08:30:44 2022-08-31 03:51:26 0000-00-00 00:00:00 2020 0 Ljubljana 0 XIV, 28 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2021-09-02 621.22:621.646.2(043.2) 223116 28026627 5980.pdf 5980.pdf 1 A526AAB8EB300EA2D4F6B82CFDF2AC18 57d10f8dd34becf5c6ca23d680d171b16ab08e52652bc24bf7db3498e574f555 bbc005d0-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=133760 Fakulteta za strojništvo 0 0 0