Research The Influence Of The Blade Profile On Performance Of Centrifugal Oil Pump

Centrifugal oil pump has been widely applied in petrochemical industry.However,domestic centrifugal oil pumps’s efficiency are much lower than otherdeveloped countries.The blade profile of centrifugal oil pump can affect pump’sperformance. Now, the method of design centrifugal oil pump mainly relies on thewater pump by curves of performance convertion, and then design the impeller’s basicdimension and blade profile.This kind of method about design the blade profile ofcentrifugal oil pump never consider the effect of liquid viscosity. for this reason, thispaper has studied the influence of the blade profile on performance of centrifugal oilpump, and try to find the best blade profile of different viscosity.This paper will rely on a doublesuction pump MS-91-280, keeping the mainimpeller’ basic dimension, entrance and exit angle the steady, choosing90°,110°and130°Warp angle to change the blade profile(110°is MS-91-280’s primary warpangle), studying these3kind of blade profile’s effect to pump’s performance.Establishing models of pump contains three sorts of different warp angles with PROE,Using GAMBIT divide the mesh, simulating three pumps with Fluent6.3.26. besidesclear water,this paper going to choose other two oils with the viscosity of24cSt and60cSt, using the software Fluent6.3.26, simulating the pump MS-91-280’sperformance.the main conclusions are as follows:1) When warp angle increases, H-Q curves became cliffy; Under the same flow,Pump head decreases; and this characteristic is Independent of the the liquid.2) When the liquid viscosity is1cSt, in design condition,130°Warp anglepump’s effiency is the highest, When the liquid viscosity is24cSt, these3kinds ofdifferent warp angle pump’s high performance district move to large flow, and110°warp angle pump’s effiency is the highest; When the liquid viscosity is60cSt,110°warp angle pump’s effiency is the highest.3) When warp angle increases, shaft power decreases,this characteristic isIndependent of the the liquid.4) Distribution of veocity and pressure are the same in Internal flow, when usingthe pump transport the different liquids.5) Shaft power is much lower when transporting oil than water in the same flow,which means density affects the shaft power more severe than viscosity.