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Vad är en centrifugalpump? Hur fungerar det?

Centrifugalpumpar, som med alla turbomachines, det är en viktigaste kallas pumphjulet, roterande en vinkelformig hastighet runt fast axeln. Den enklaste formen av centrifugal pumphjulet erhålls genom centralt (radiellt) vingar mellan två parallella skivor. Dessutom en av skivorna är förtjockning runt axeln och ansluter till en mil. Somanges i följande figur, en flytande partikel inuti pumphjulet roterar runt den roterande axeln med hastigheten på U = rωwith hjulet, medan å andra sidan, den flyttar enligt hjulet med W-hastigheten och lämnar. U blir namnet på den relativa hastigheten av miljömässiga hastighet, W.

 

När en vätskefylld pumphjulet börjar snurra runt sin axel, börjar det växa fram från vätska B ytan under inflytande av centrifugalkraften. Således, vätskan absorberas frånytan av E trycks ut från den ytan B.

 

Flödet sett av en roterande observatör med hjulet skiljer sig från flödet av observatören i orörlig miljön. Hastigheten hos en partikel som flyttar inom flödet, enligt en stationär observatör i orörlig miljön, har den absoluta hastigheten, hastighet relativa hastighet som hjulet ser vid den punkt där en observatör snurrar med ratten.

 

Absoluta hastighet är vectorial summan av C, W, och du hastigheter. Med intensitetoch riktning av W och du hastigheter bildar de en rektangulär kant. Detta tröskelvärde representerar den absoluta hastigheten av rektangelns diagonal. Kanterna på rektangeln anger den relativa hastigheten av W och omgivande hastighet du, beroende på intensitet och riktning av våld. Således bildar dessa tre hastigheter en triangel. Iberäkningar ageras ett oändligt antal mycket tunna vingar på tanken. I det här fallet,är det acceptabelt att övervakas fullt flöde garnstorlek och att fodret är en endimensionell. Vid icke-effekt-ingång är i början av vingen tangent till den relativa hastigheten av indata. Med ett annat uttryck är W1, vilket gör en β1 vinkel med intaget kammare pumpar, i samma riktning som vingprofilen. Likaså är den W2 hastighet, vilketgör en β2 vinkel med slutet av avfarten wing, i samma riktning. Riktning mot ingången beror på riktningen av det första wing-elementet i posten och orienteringen av posten hastighet när transaktionen begärs skall utföras utan distorsion och därmed förhindra förluster. I pumpar slutar bladet under β2 meta av W2 relativa hastighet.

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