Primjena radnog kola pumpe sa razdvojenim aksijalnim kućištem
Mnogo je faktora koje treba uzeti u obzir prilikom odabira aksijalna podeljena pumpa i radno kolo ispravno.
Prvo, moramo znati gdje tečnost treba transportovati i kojom brzinom protoka. Potrebna kombinacija napona i protoka naziva se radna tačka. Radna tačka je direktno povezana sa potrebnom geometrijom radnog kola. Aplikacije sa dugim vertikalnim pumpanjem (visoka visina) zahtevaju rotore većeg spoljašnjeg prečnika nego aplikacije sa kratkim vertikalnim pumpanjem (pumpanje).
Another consideration that is directly related to impeller size is the expected solids content in the application. Many applications have a variety of solids in the pumped media. These solids can range from small abrasive debris such as sand or metal shavings to fine fibrous materials to large solids the size of a baseball or larger. The pump and impeller selected must be able to pass these solids while avoiding clogging and damage from wear. Additional consideration must also be given to the equipment downstream of the axial split case pump. While a pump can be selected to pass a specific type of solids, it cannot be assumed that the downstream piping, valves, and other process equipment will have the same solids handling capabilities. Knowing the expected solids content in the liquid is critical not only to selecting the right size pump and impeller, but also to selecting the impeller style that best suits the application.
Jedan od najčešćih impelera za rukovanje čvrstim tvarima je otvoreni impeler. Ovo radno kolo se obično koristi u tretmanu kanalizacije i otpadnih voda i ima geometriju koja uključuje prolaze između lopatica sa otvorenom stranom okrenutom prema ulazu. Prostori između lopatica obezbeđuju glatki put za impeler da potisne nadolazeće čvrste materije od usisnog otvora rotora do spirale i konačno kroz pražnjenje pumpe.
Druga opcija za rukovanje čvrstim materijama je vrtložni ili udubljeni impeler. Ovaj tip impelera je montiran unutar kućišta (stvarajući veliki otvoreni prostor između radnog kola i usisnog otvora) i indukuje kretanje fluida kroz vrtloge nastale brzom rotacijom radnog kola. Iako ovaj pristup nije tako efikasan, on pruža mnoge prednosti za prolaz čvrstih materija. Glavne prednosti su veliki slobodan prostor i minimalna prepreka prolazu čvrstih materija.
Pumps used at high altitudes have their own set of solids handling considerations. Since these applications typically use smaller piping, the solids passage size of the entire system must be considered, not just the pump. Typically, the axial split case pump manufacturers offering high-pressure pumps will include a strainer at the inlet to prevent large solids from entering the pump.
This is ideal for high-pressure applications where minimal solids are expected, but can cause clogging if enough solids accumulate around the screen surface.
There are many factors to consider when choosing the right axial split case pump and impeller, and understanding the various styles of pumps and impellers is often one of the most critical steps.