ANALIZA KARAKTERISTIKA ZATVARAČA

In this paper, analysis of valves and their influence on the hydraulic systems is being performed. Special attention is devoted to the analysis of the valve flow coefficient. Flow coefficient data from various manufacturers were collected and processed within Author’s Master Thesis and presented in a form of a manual. This manual serves as a support in selecting valves as well as in comparison of different types of valves as well as different manufacturers of the same type of valve. Additionally, suitable locations for the positioning of the pump within the system were considered. A simple example of a flow transient, caused by both sudden and gradual closing of the valve has been processed. The calculation has been performed analytically for the purpose of simplifying the approach as well as in order to ease the understanding of the problem. Finally, a comparison of the application of different valves in the transient process was performed in the calculation.U ovom radu izvršena je analiza zatvarača i njihov uticaj na hidrauličke sisteme. Posebna pažnja je posvećena analizi protočnog koeficijenta zatvarača. Prikupljeni su i obrađeni podaci o protočnim koeficijentima različitih proizvođača u master radu autora i prezentovani su u obliku priručnika. Ovaj priručnik služi kao pomoć u odabiru zatvarača, za poređenje različitih tipova zatvarača kao i različitih proizvođača istog tipa zatvarača. Takođe se razmatra i odgovarajuće mesto najpogodnije za postavljanje pumpe u sistemu. Obrađen je jednostavan primer prelaznog procesa izazvanog naglim ili postepenim zatvaranjem zatvarača. Analitičko izračunavanje je primenjeno u cilju pojednostavljenog pristupa kao i u cilju olakšanog razumevanja problema. Konačno, izvršeno je poređenje primene različitih zatvarača u prelaznom procesu