离心泵叶轮绘型时叶片加厚的精确方法

214JOURNALOFHEBEIUNIVERSITYOFVol.21No.4552000SCIENCEANDTECHNOLOGYSum552000:1008-1542(2000)04-0043-0305朱玉峰(河北科技大学机械电子工程学院,河北石家庄　050054):为使离心泵叶轮绘型时的叶片加厚更加精确,本文对叶片加厚采用的传统方法存在的问题进行了分析,进而给出了一种叶片加厚的精确方法。该方法精确、可靠,可用于计算机设计及手工计算。:离心泵;叶轮绘型;叶片加厚:TH311　　:A,,,,,[13],,,1[1]1.11),2)S,1,,1ACS2,:S=sin=1+cot2cos2(1)90;;,ATAD,3;,3)Sm,13::1999-12-26;:2000-07-11;::(1966-),,,,图1　流面上的叶片厚度Sm=Scos=1+tan2+cot2(2)1.2S,,,1(1):S,1,=90,S=;=7090,S7%,=60,15.5%;,,S,S,,,,;,,图2　叶片真实厚度与流面厚度的关系表1　以流面厚度代替真实厚度带来的误差/()S/S-/(%)9010801.0151.5701.0646.4601.15515.5501.30530.5图3　轴面上的叶片厚度401.55655.61.31),,a,b,c2)sm图4　精确绘制过程框图5,13,230I,5a,b,c3)Sm(2)442000Sma,Smb,Smc,,,5:,图5　实际厚度的变化规律4),,Sma,Smb,Smc12Sma,12Smb,12Smc,,,Sma,Smb,Smc,5),,,2,:,,:[1].[M].:,1985.113-117.[2].[M].:,1977.149-169.[3].[M].:,1983.173-179.[4],,,.[J].,1999,16(2):29-31.TheExactMethodofThickeningVaneswhenDrawingtheImpellerofaCentrifugalPumpZHUYu-feng(CollegeofMechanicalandElectronicEngineering,HebeiUniversityofScienceandTechnology,ShijiazhuangHebei050054,China)Abstract:Inordertomakethickeningvanesmoreexactwhendrawingimpellerofacentrifugalpump,theproblemsareanalyzedwhenthickeningvaneswiththetraditionalmethod.Anexactmethodofthickeningvanesisdevelopedinthepaper,andthemethodisexactandreliable;itcanbeusedincomputerdesignandmanualcalculation.Keywords:centrifugalpump;drawingimpeller;thickeningvanes454