Effect of spool material of seating valve on performance in water hydraulic

Industrija hidravličnih komponent za uporabo v oljni hidravliki je tekom časa zgradila monopol nad razvojem. Razvijale so se le komponente za uporabo v oljni hidravliki. Voda ima v primerjavi z oljem kot hidravlično kapljevino boljši ekološki vpliv, saj ne onesnažuje okolja. Prav ekologija je pognala ponovni razvoj vodne hidravlike, ki se je uporabljala že v samih začetkih razvoja hidravlike. Razvoj vodne hidravlike napreduje, pa se lahko kosa z oljno hidravliko? Prav to se sprašujemo v tej diplomski nalogi. Potni ventil, ki je v osnovi namenjen uporabi v oljni hidravliki, smo preizkušali v vodni hidravliki. Raziskali smo odzivnost vodne hidravlike s krmilnimi bati različnih materialov. Ti materiali so bili jeklo, aluminij in dva različna polimera. To smo ponovili še za oljno hidravliko ter odzive med seboj primerjali. Za potni ventil EVC-34 smo zasnovali oljno in vodno preizkuševališče. Odzivnost krmilnih batov smo merili s hitro kamero in tlačnimi senzorji, meritve pa smo ponovili pri različnih tlakih.Over time, the hydraulic component industry for oil hydraulics has gained a monopoly in development. Only components for oil hydraulics have been developed. Compared with oil, water as a hydraulic fluid has a better ecological effect, because it does not pollute the environment. Ecology has restarted the development of water hydraulics, which was used in the early days of hydraulics. The development of water hydraulics is progressing, but can it compete with oil hydraulics? That is the main question in this dissertation. We used a directional control valve, originally developed for oil hydraulics, in water hydraulics. We studied the performance of control spools made of different materials. These materials were steel, aluminium and two different polymers. We repeated the tests with oil hydraulics and compared the results. We designed an oil and water test station or seating valve EVC-34. The response of the control spool was measured with a high-speed camera and a pressure sensor. The measurements were repeated at different pressures