低加疏水泵说明书中英文版

1概述NW型系列低加疏水泵是我公司根据市场实际需要，选用优秀水力模型，自行研制开发的疏水泵新产品，用于12.5万千瓦~30万千瓦火电厂输送低压加热器疏水。该系列泵共10个型号30个规格，最大流量由行业134m3/h提高到300m3/h。为提高汽蚀性能，除用诱导论、首级叶轮抗汽蚀设计外，还用降低转速的设计方法，对汽蚀性能作了充分的保障，非常适合低NPSH工况的工作条件；结构设计独特，转子部件采用多级叶轮，通过加、减级数增大水泵压力选择范围；结构和材料的改变使泵在非中心支撑时介质最高温度由行业1300C提高到1600C；除150NW-58型泵外的NW型泵出水流道均采用蜗壳式压水室，可提高泵的效率和较大幅度调整泵的性能；装配和维修非常便利。GeneralintroductionNWseriesheaterdrainagepumpsarethenewproductsdevelopedbyourcompanyaccordingtothemarketactualdemand,selectingexcellenthydraulicmodel,whichareappliedtoconveylow-pressureheaterdrainagefor125,000kW~300,000kWsteampowerplant.Theseriespumpshave10typesandaltogether30specifications,themaximumcapacityinthisfieldraisefrom134m3/hto300m3/h.Inordertoimprovethecavitationperformance,exceptforusinganti-cavitationdesignwithinducerandfirst-stageimpeller,italsoadoptsthedesignmethodofreducingrotationspeedtofullyensurethecavitationperformance,anditisverymuchsuitablefortheworkingconditionoflowNPSHoperatingcondition;withuniquestructuraldesign,rotorpartsadoptmultistageimpeller,enlargingtheselectionrangeofpumppressurebyincreasingordecreasingstagenumber;thechangesofstructureandmaterialmakethemediumtemperatureinthefieldraisefrom1300Cto1600Cwhenpumpsarenoncentralsupport;theoutletintervalchannelofNWexceptfor150NW-58typepumpsalladoptvolutepressurizedwaterchamber,itmayimprovepumpefficiencyandadjustpumpperformancetoagreatextent;theassemblyandmaintenanceforthepumpsareveryconvenient.型号意义125NW–44x3级数为3级单级扬程为44米卧式疏水泵泵进口直径为125毫米2Typedefinition125NW–44x3Thenumberofstageis3Single-stageheadis44mHorizontaldrainagepumpPumpinletdiameteris125mm适用条件介质：温度≤1600C的饱和蒸汽水；流量：36~300m3/h；扬程：55~290m；压力：水泵进口法兰压力1.6MPa，出口法兰压力4.0MPa；转向：从电机端看为逆时针方向旋转；填料密封水：流量为1~2m3/h，压力略高于水泵进水压力的凝结水；冷却水：流量为2~3m3/h，温度＜500C，压力为0.2~0.3MPa的工业水。AppliedconditionsMedium:Saturatedsteamwater,temperature≤1600C;Capacity:36~300m3/h;Head:55~290m;Pressure:Pumpinletflangepressure:1.6Mpa,outletflangepressure:4.0Mpa;Rotationdirection:Seenfrommotorend,itrotatesincounterclockwise;Packingsealwater:Capacity1~2m3/h,thepressureisalittlebithigherthanthecondensationwaterofpumpinletpressure;Coolingwater:Industrialwaterwhosecapacity2~3m3/h,temperature＜500C,pressure0.2~0.3Mpa.3性能参数表Performanceparametertable泵型号Pumptype流量Capacity扬程Head转速Speed功率Power效率Eff.汽蚀余量泵重/底座Pumpweight/baseplateQHn轴功率Shaftpower配用功率Motorpowerη(NPSH)r（m3/h）（l/s）（m）（r/min）(kW)（%）（m）（kg）80NW-57x2287.8120296017.330532240/75361011419.3584311.910320.0602.380NW-57x3287.8180296024.33756.52261/75361017027.8604311.915429.6612.380NW-57x4287.8240296032.445/5556.52283/83361022837.3604311.920539.4612.3100NW-44x2287.893296013.422531.5282/6836108814.758.74311.98015.6601.8100NW-44x3287.8137296019.730531.5308/71361013222.158.74311.912023.4601.8100NW-44x4287.8179296025.837531.5333/75361017629.458.74311.916031.2601.8125NW-44x24311.993296018.830581.5332/745715.88821.862.66417.88322.863.51.8125NW-44x34311.9139.5296028.245581.5355/765715.813232.862.66417.8124.534.263.51.8125NW-44x44311.9186296037.655581.5373/615715.817643.762.66417.816645.663.51.8150NW-53x25515.3114296027.237631.9423/1087019.410630.26728323.19733.665.23.2150NW-53x35515.3171296040.755631.9445/1157019.415945.36728323.114550.365.23.2150NW-53x45515.3228296054.275631.9465/1227019.420859.26728323.119768.365.23.24泵型号Pumptype流量Capacity扬程Head转速Speed功率Power效率Eff.汽蚀余量泵重/底座Pumpweight/baseplateQHn轴功率Shaftpower配用功率Motorpowerη(NPSH)r（m3/h）（l/s）（m）（r/min）(kW)（%）（m）（kg）150NW-60x210428.9126.6296053.875/9066.71.8500/16613437.212060.972216144.711168.870.82.5150NW-60x310428.9190296080.7110/13266.71.8534/16013437.218091.372216144.7166.9103.470.82.5150NW-60x410428.92532960107.516066.71.8564/16513437.2240121.772216144.7222.5137.970.82.5150NW-58x34011.1182296033.155601.4655/1275013.917437.6631.56016.716241.4641.7150NW-58x44011.1240296043.675601.4687/1335013.923250.2631.56016.721053.6641.7150NW-58x54011.1303296055.090601.4720/1405013.929062.7631.56016.727169.2641.7150NW-77x28523.6155296052.890681.9513/14410529.215462.970212635.015075.7682.5150NW-77x38523.6233296079.4132681.9550/15710529.223094.070212635.0226114.1682.5150NW-77x48523.63112960105.9160681.9595/16410529.2308125.970212635.0301152682.5150NW-27.5x25013.956148013.922551.7490/956518.15515.363.528022.252.517.166.82.2150NW-27.5x35013.984148020.837551.7523/986518.182.523.063.528022.278.725.766.82.2150NW-27.5x45013.9112148027.745551.7551/1036518.111030.763.528022.210534.366.82.25产品结构图1)150NW-27.5型泵结构图泵型号Pumptype流量Capacity扬程Head转速Speed功率Power效率Eff.汽蚀余量泵重/底座Pumpweight/baseplateQHn轴功率Shaftpower配用功率Motorpowerη(NPSH)r（m3/h）（l/s）（m）(r/min)(kW)(kW)（%）（m）（kg）250NW-44X213136.4103148057.39064.23.2776/15517047.29965.270.33.819855.08671.664.84250NW-44X313136.4155148086.213264.23.2841/15817047.214897.570.33.819855.0129107.464.84250NW-44X413136.42071480115.116064.23.2900/17017047.2197129.870.33.819855.0172143.264.84250NW-47X226072.2991480100.513269.84.2931/19630083.393108.6704.334094.487125.9645.1250NW-47X326072.2148.51480150.7185/20069.84.21009/20030083.3140163.5704.334094.4130.5188.9645.1250NW-47X426072.2197148020025069.84.21080/21630083.3187218.47