4-73C式锅炉通引风机样本

1、风机的用途G4-73和Y4-73型锅炉通、引风机主要适用于火力发电厂中2670t/h蒸汽锅炉的通、引风系统。在无其它特殊要求时，G4-73亦可用于在矿井通风及一般通风。通风机输送的介质为空气，最高温度不得超过80°C；引风机输送的介质为烟气，最高温度不得超过250C。在引风机前，必须加装除尘装置，以尽可能减少进入风机中烟气的含尘量。根据一般电厂的使用情况，所配除尘器效率不得低于85%。风机的型式1、通风机与引风机均制成单吸入，各有Nq818共11个机号。2、从电机一端正视，叶轮顺时针旋转者称右旋风机，以“右”表示；反之为左旋风机，以“左”表示。3、风机的出风口位置，以机壳的出风口角度

2、表示。4、风机的传动方式为C式，均采用弹性联轴器联接。风机的结构风机主要由叶轮、机壳、进风口、调节门及传动部分组成。1、叶轮12后倾机翼斜切形叶片焊接于锥弧形前盘与平板后盘中间。由于采用了机翼形叶片，保证了风机主效率、低噪声、高强度。叶轮经静动平衡校正和超速运转试验，故运转平稳可靠。同一机号的通、引风机叶轮，结构相同，但材质不同，一般来说通风机选A3,引风机选16Mn。2、机壳用普通钢板焊接成蜗形体。单吸入风机的机壳做成三种不同形式（N812机壳作成整体结构，不能拆开，N1416机壳作成两开式，N1829.5机壳作成三开式）。对引风机，蜗形板作了适当加厚，以防磨损。3、进风口收敛、流线型的进风

3、口制成整体结构，用螺栓固定于风机入口一侧。4、调节门用来调节流量的装置，轴向安装于进风口之前。调节范围由0度（全开）到90度（全闭）。调节门的搬把位置：从进风口方向看在右侧，对右旋风机，搬把由下往上推是由全闭到全开方向，对左旋风机，搬把由上往下拉是由全闭到全开方向。5、传动传动部分的主轴由优质钢制成，本风机均采用滚动轴承。轴承箱有两种形式：Nq816用整体的筒式轴承箱；Nq1829.5用两个独立的枕式轴承箱。轴承箱上装有温度计和油位指示器（仅引风机）。润滑油采用30号机械油，加油量按油位标示要求°N816整体筒式轴承箱如采用干油时，在轴承箱内滚珠一侧应加挡油板，其固定槽予已制。引风机

4、备有水冷装置，因此，须加输水管，耗水量随气温不同而异，一般按0.51m3/h考虑。风机的性能与选择GY4-73型风机只出给N10样机的无因次性能表及曲线。由给出的无因次性能表或曲线可计算N8-28所有机号的有因次性能。由无因次参数计算有因次参数的公式为：Q=900nD2U0(m3/h)22Kp=plU2®2/l0l30023.5plU彳9J+1-1354550k丿P=pU2屮/Kp(Pa)12Pre二pinK(KW)耳mPin=程4000piu2九(KW)式中：P全压（Pa）Q流量（ms/h）D2叶轮叶片外缘直径（m）U2叶轮叶片外缘线速度（m/s）Kp全压压缩性系数Pin一内功率（

5、KW）Pre所需功率（KW）nm机械效率，D式传动取0.98P1一进气密度（kg/m3）K电机储备系数，通风机取1.15，引风机取1.3GY4-73NQ10样机无因次性能表1234567800.1470.1660.1860.2050.2240.2430.2630.282屮0.4720.4700.4650.4530.4320.4030.3620.315屮d0.01930.02460.03090.03750.04480.05280.06190.0712入0.08740.09380.10090.10670.11150.11440.1150.1119nin0.7940.8320.8570.870.86

6、80.8560.8280.794图3管网特性和全压偏差与流量关系流量过多或不足的处理：在使用时，常常发现流量过多或不足的现象。产生这种现象的原因很多，如在使用过程中流量发生时大时小的现象，主要由于管网中的阻力时大时小或风机在飞动区工作等缘故；如果是在使用过程中，经过较长时间逐渐减少，或在短时间内突然减少，则主要是由于管网堵塞。在新风机安装后，进行运转时就发生流量过大或不足现象，其主要原因有下列几点：(1) 管网阻力实际值与计算值相差过大。一般管风特性方程式：P=KQ2,式中K阻力系数，如实际值K小于计算K,则流量增大，反之则流量减少。(2) 选择时未考虑风机本身全压偏差AP影响，当风机实际全压

7、为正偏差时，则流量增大，为负偏差时，则流量减少。在新风机安装后，开始正式运转时，或在使用过程中发生流量过大或过小时，可采用下列方法之一消除：(1) 利用调节门的开闭程度调节流量。(2) 改变风机转速调节流量。(3) 调换新的压力较高或较低的风机调节流量。(4) 改变管网阻力系数调节流量。必须指出的是：一般都采用节流装置来调节流量，但当实际流量比所需流量大得很多时，这种方法浪费电力过多，很不经济，如条件允许，通常用降低风机转速或调换压力较低的风机。当调节门全开时，流量仍嫌过小，此时应设法减小管网阻力系数，以增加流量，亦可采用提高风机转速和调换压力较高的风机，但风机的最大转速不得超性能表之最高转速

8、。风机性能一般指在标准状态下输送空气的性能。引风机指定状态为大气压力Pa=101300Pa,气体温度t=200°C，气体密度p=0.745kg/ma。性能表中性能均指调节叶片为全开0度时。订货时以性能表为准。当实际使用状态与上述指定状态不符时，则必须把实际使用状态的性能换算到指定状态的性能，然后根据换算性能选择风机。其换算公式如下：Q=Qn°(m3/h)0np=p/n0、20P0jKL(Pa)PKp03Pin二Pin(巴)巴0(KW)nin=nin0式中：n一转速（r/min）in内效率，有注脚0为指定状态，无注脚0为使用状态安装调试和操作在安装前首先应准备好安装所需的材料

9、及工具，并对风机各部机件进行检查，对叶轮、主轴和轴承等更应仔细检查，如发现损伤，应该修好，然后用煤油清洗轴承箱内部。在安装操作过程中必须注意下列几点：1、在一些接合面上，为防生锈，减少拆卸困难，应涂上润滑脂或机油。2、在上接合面的螺栓时，如有定位销钉、应先上好销钉再拧紧螺栓。3、检查机壳内及其它壳体内部，不应有掉入和遗留的工具或杂物。二）安装要求1、按图纸所示位置及尺寸安装，为得到高效率特别要保证进风口与叶轮的间隙尺寸。2、保证主轴的水平位置，并测量主轴与电机轴的同心度及联轴器两端的不平行度。两轴不平行允差为0.05mm，联轴器两端面不平行度允差为0.05mm。3、安装调节门时，注意不要装反，

10、要保证进气方向与叶轮旋转方向一致4、风机安装后，拨动转子，检查是否有过紧或与固定部分刮蹭现象。5、安装风机进口出口管道时，重量不应加在机壳上。6、全部安装后，经总检合，方可试运转。（二）风机的试运转1、风机的试运转应在无载荷（关闭进气管道闸门或调节门）情况下进行。2、如运转情况良好，再转入满载荷（规定全压和流量）运转。3、满载荷运转，对新安装风机不少于2小时，对修理后的风机不少于半小时（三）风机的操作1、风机启动时，应做下列准备工作：Q关闭调节门。Q检查风机各部的间隙尺寸，转动部分与固定部分有无刮蹭现象。©联轴器应加保护罩。Q检查轴承的油位是否在最高与最低油位之间。©5点车

11、检查叶轮旋向与标牌是否一致，各部接线、仪表是否显示正常，有无漏水、漏电、漏油现象和异味、异响、异震、松动等现象，如有应排除之。2、风机启动后，逐渐开大调节门，直达正常工况。运转过程中，轴承温升不得超过周围环境40°C。轴承部位的均方根振动速度值不得大于6.3mm/s。3、下列情况下，必须紧急停车：©1发觉风机有剧烈的噪声；©2轴承的温度剧烈上升；©3风机发生剧烈振动和撞击。风机的维护一）风机维护工作制度1、风机必须专人使用，专人维修。2、风机不许带病运行。3、定期清除风机内部的灰尘，特别是叶轮上的灰尘、污垢等杂质，以防止锈蚀和失衡。4、风机维修必须强调首

12、先断电停车。（二）风机正常工作运转中的注意事项1、如发现流量过大，或短时间内需要较小的流量时，可利用调节门进行调节2、对温度计及油标的灵敏性定期检查。3、除每次拆修后应更换润滑油外，正常情况下36月更换一次润滑油。（三）风机的主要故障及原因1、轴承箱剧烈振动Q风机轴与电机轴不同心，联轴器装歪；©机壳或进风口与叶轮磨擦；©基础的刚度不牢固；©4叶轮铆钉松动或叶轮变形；©5叶轮轴盘与轴松动，或联轴器螺栓松动；©6机壳与支架、轴承箱与支架、轴承箱盖与座等联接螺栓松动；©7风机进出气管道安装不良；©8转子不平衡；©9引风机

13、叶片磨损。2、轴承温升过高©1轴承箱剧烈振动；©2润滑油脂质量不良、变质、含有过多灰尘、粘砂、污垢等杂质；©轴承箱盖、座联接螺栓紧力过大或过小；Q轴与滚动轴承安装歪斜，前后二轴承不同心；©5滚动轴承损坏。3、电机电流过大或温升过©1开车时进气管道闸门或节流阀未关严；©2流量超过规定值；©3风机输送气体的密度过大或粘性物质；©4电机输入电压过低或电源单相断电；©5联轴器联接不正，皮圈过紧或间隙不匀；©6受轴承箱剧烈振动的影响。（四）安装和修理时最好与厂家联系订货须知订货时须书面注明风机的机号、转速

14、、风量、风压、出风口角度、旋转方向以及电动机型号规格。4-73Nq9C离心通风机性能表机号传动方式转速r/min流量m3/h全压Pa内效率内功率kw所需功率kw电动机8C9601069692279.43.423.946-5.51207991883.23.684.231353490885.73.964.5514916885874.184.811629984386.84.375.031768178685.64.485.161913670682.84.515.182052061479.44.395.048C100011142100179.43.874.456-7.51258299683.24.164

15、.781409898585.74.475.1415538960874.735.441697891586.84.945.681841885385.65.075.831993476682.85.095.862137466679.44.965.708C112012479125579.45.446.254-1114092125083.25.846.7115790123685.76.287.22174021204876.657.6419015114886.86.947.9820628107085.67.128.192232696182.87.168.232393983579.46.968.018C125

16、013928156479.47.568.694-1515728155783.28.129.3317622154085.78.7310.04194221500879.2410.6221222143086.89.6511.1023022133385.69.9011.3824917119782.89.9511.4426718104079.49.6811.138C145016156210479.411.8013.924-18.518244209583.212.6714.7020442207285.713.6315.812253020188714.4216.7324618192486.815.0617.

17、4726706179485.615.4517.9228904161182.815.5318.0130993140079.415.1117.53机号传动方式转速r/min流量m3/h全压Pa内效率内功率kw所需功率kw电动机9C90014278102679.45.085.856-816123102183.25.466.2818066101085.75.876.7519911984876.217.152175693886.86.497.462360287585.66.667.662554478682.86.697.702739068379.46.517.499C96015230116779.46.

18、177.106-1117198116283.26.637.6219270114985.77.138.20212381120877.548.6723207106786.87.889.062517599585.68.089.292724789482.88.129.342921677779.47.909.099C100015864126779.46.978.026-1117915126183.27.498.6120073124785.78.069.27221231215878.529.8024174115886.88.9010.2426224108085.69.1310.502838297082.8

19、9.1810.563043484379.48.9310.279C112017768158979.49.8011.274-1520064158283.210.5212.1022482156585.711.3213.022477815248711.9813.7727074145386.812.5114.3829371135585.612.8314.7531788121682.812.9014.8334086105779.412.5514.439C125019830197979.413.6215.6742222393197083.214.6316.8225091194985.715.7418.102

20、765418988716.6519.1430217181086.817.3919.9932780168785.617.8420.5135478151582.817.9320.6238042131779.417.4420.064-73NQ19C离心通风机性能表机号传动方式转速r/min流量mh全压Pa内效率内功率kw所需功率kw电动机10C80017409100179.46.056.956-111965999683.26.497.472202898585.76.998.0324278960877.398.502652891586.87.728.882877885385.67.929.113114

21、776682.87.969.153339866679.47.74&9110C90019586126779.4&619.906-1522117126183.29.2510.6324782124785.79.9511.442731312158710.5212.1029844115886.810.9912.6432375108085.611.2712.973504097082.811.3313.033757284379.411.0312.6810C100021762156479.411.8113.586-18.524574155783.212.6814.5927535154085.7

22、13.6415.693034815008714.4316.6033160143086.815.0817.3435973133385.615.4717.7938933119782.815.5517.8841747104079.415.1317.3910C112024373196179.416.6019.084-3727523195383.217.8220.4930839193285.719.1722.043398918818720.2823.3237139179486.821.1824.3640289167285.621.7324.9943605150282.821.8425.124675713

23、0579.421.2524.4410C125027202244379.423.0726.534-3730718243383.224.7728.4934419240685.726.6530.653793423438728.1932.4241450223486.829.4433.8644966208385.630.2134.7448666187182.830.3634.9252184162679.429.5433.97机号传动方式转速r/min流量m3/h全压Pa内效率内功率kw所需功率kw电动机11C80023172121179.49.7411.206-1526167120683.210.461

24、2.0329319119285.711.2512.943231411618711.9013.6935309110786.812.4314.3038304103285.612.7514.674145692782.812.8214.744445280679.412.4714.3411C90026069153279.413.8715.9562229438152683.214.8917.1232984150985.716.0218.423635314708716.9519.4939722140186.817.7020.3543091130785.618.1620.8846638117382.818.2

25、520.9950009102079.417.7620.4211C100028965189279.419.0221.886-3732708188483.220.4323.4936649186385.721.9725.274039318158723.2526.7344136173086.824.2827.9247879161385.624.9128.6451820144982.825.0428.7955565125979.424.3628.0111C112032441237379.426.7330.746-4536633236383.228.7033.0041047233785.730.8735.

26、504524022768732.6637.5649432217086.834.1139.2353625202485.634.9940.2458038181782.835.1840.4562233157979.434.2239.3611C125036206295679.437.1642.734-5540886294483.239.8945.8845811291185.742.9249.365049128358745.4152.2255170270386.847.4254.5359849252185.648.6555.9564775226482.848.9056.2469457196779.447

27、.5854.71机号传动方式转速r/min流量mh全压Pa内效率内功率kw所需功率kw电动机12C80030084144179.415.0517.316-2233972143583.216.1618.5838064141985.717.3819.994195213828718.3921.1545840131886.819.2122.0949728122985.619.7022.6653821110382.819.8122.785771195979.419.2722.1612C90033844182479.421.4324.646-3738218181683.223.0126.464282217

28、9685.724.7528.464719617498726.1830.1151570166886.827.3531.4555944155585.628.0532.2660549139682.828.2032.4364925121479.427.4431.5512C100037604225279.429.3933.8065542464224283.231.5636.2947581221785.733.9539.045244121608735.9241.3157301205986.837.5143.1462161192085.638.4844.2667277172482.838.6844.4972

29、139149879.437.6443.2812C112042117282479.441.2947.496-7547560281283.244.3450.9953290278185.747.7054.855873327098750.4658.0364177258386.852.7060.6169620240885.654.0762.1875350216382.854.3562.5080796187979.452.8860.8112C125047006351879.457.4166.024-9053081350383.261.6470.8959476346585.766.3176.26655513

30、3748770.1580.6871626321786.873.2784.2677701300085.675.1686.4484096269482.875.5586.8990174234179.473.5184.54机号传动方式转速r/min流量m3/h全压Pa内效率内功率kw所需功率kw电动机13C80038249169179.422.4625.826-3743192168483.224.1127.7348396166585.725.9429.835333916228727.4431.5658282154786.828.6632.9663225144285.629.4033.816842912

31、9582.829.5533.9973375112579.428.7533.0713C90043030214079.431.9736.776-5548591213183.234.3339.4854445210885.736.9342.476000620538739.0744.9365567195786.840.8146.9371128182585.641.8648.1476983163982.842.0848.3982546142479.440.9447.0813C100047811264379.443.8650.446-7553990263183.247.0954.1560494260285.

32、750.6658.266667425348753.6061.6372853241686.855.9764.3779032225385.657.4266.0485536202382.857.7266.3891718175879.456.1664.5813C112053548331579.461.6270.866-9060469330183.266.1676.0867754326485.771.1781.857467431798775.3086.5981595303186.878.6490.4488515282685.680.6892.7895801253882.881.0993.26102724

33、220679.478.9090.7413C125059763412979.485.6698.514-13767487411183.291.97105.7775618406685.798.94113.7983342396087104.68120.3891066377686.8109.32125.7298790352185.6112.16128.98106920316182.8112.74129.65114648274779.4109.69126.14机号传动方式转速r/min流量m3/h全压Pa内效率内功率kw所需功率kw电动机14C71042397154579.422.7426.156-374

34、7877153883.224.4128.0853645152185.726.2630.205912414828727.7931.9564604141386.829.0233.3770083131785.629.7734.2475851118382.829.9234.4181333102879.429.1233.4814C80047772196179.432.5337.4165553946195383.234.9240.1660445193285.737.5743.216661918818739.7545.7172793179486.841.5147.7478967167285.642.5948

35、.9885466150282.842.8149.2391643130579.441.6547.9014C90053743248279.446.3153.266-7560689247283.249.7357.1968000244585.753.4961.527494623818756.6065.0881892227086.859.1167.9788838211785.660.6469.7396149190182.860.9570.09103098165279.459.3068.2014C100059715306579.463.5373.066-11067432305283.268.2178.44

36、75556301885.773.3884.398327429398777.6389.2890991280286.881.0893.2498709261385.683.1895.66106833234782.883.6196.15114554203979.481.3593.5514C112066880384479.489.25102.646-13775524382883.295.83110.2184623378685.7103.09118.5693266368787109.07125.43101910351586.8113.91131.00110554327885.6116.86134.3911

37、9653294482.8117.47135.09128300255879.4114.29131.43机号传动方式转速r/min流量m3/h全压Pa内效率内功率kw所需功率kw电动机15C71052147177379.432.1036.928-5558886176683.234.4739.6465981174785.737.0842.657272017018739.2345.1279460162286.840.9747.1286199151285.642.0348.3493294135882.842.2548.59100036118079.441.1147.2815C73053616187579

38、.434.8940.138-5560545186783.237.4743.0967839184685.740.3146.357476917988742.6449.0481698171486.844.5351.2188627159985.645.6952.5495922143682.845.9252.81102854124779.444.6851.3815C80058757225279.445.9352.818-7566351224283.249.3156.7174345221785.753.0561.018193821608756.1264.5489532205986.858.6167.419

39、7126192085.660.1369.15105120172482.860.4469.51112717149879.458.8167.6315C90066102285079.465.3975.208-11074645283783.270.2180.7483638280685.775.5386.869218127338779.9191.90100724260686.883.4695.97109267243085.685.6298.46118260218282.886.0698.97126807189679.483.7396.2915C100073446351879.489.70103.156-

40、13782938350383.296.31110.7692931346585.7103.61119.15102423337487109.61126.06111915321786.8114.48131.65121407300085.6117.44135.06131400269482.8118.05135.76140896234179.4114.86132.09机号传动方式转速r/min流量m3/h全压Pa内效率内功率kw所需功率kw电动机16C50044568100179.415.4817.808-225032899683.216.6219.125639298585.717.8820.57621

41、529608718.9221.766791291586.819.7622.727367285385.620.2723.317973576682.820.3823.438549866679.419.8322.8016C71063287201879.444.3350.988-7571466200983.247.6054.7480076198785.751.2158.898825519358754.1762.3096435184586.856.5865.06104614172185.658.0466.75113224154582.858.3467.10121407134379.456.7765.28

42、16C73065070213379.448.1855.418-7573479212483.251.7459.5082332210185.755.6664.009074220468758.8867.7199151195186.861.4970.72107561181985.663.0972.55116413163382.863.4172.93124827141979.461.7070.9516C80071309256279.463.4272.936-11080525255183.268.0978.3190227252385.773.2584.249944324578777.5089.121086

43、59234386.880.9493.08117875218485.683.0395.49127576196282.883.4695.98136797170579.481.2093.3916C90080223324279.490.29103.846-13790591322883.296.95111.49101505319385.7104.30119.94111873311087110.34126.89122241296586.8115.24132.52132609276585.6118.22135.96143523248382.8118.84136.66153896215779.4115.621

44、32.96机号传动方式转速r/min流量m3/h全压Pa内效率内功率kw所需功率kw电动机17C50053458113079.420.9624.118-3760367112583.222.5125.8967640111385.724.2227.857454910848725.6229.4681458103386.826.7630.778836696385.627.4531.579563986582.827.5931.7310255275279.426.8530.8717C71075910227879.460.0369.038-9085721226883.264.4574.1296048224385.769.3479.7410585921858773.3684.36115670