三相异步电动机使用维护说明书.docx

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1、三相交流异步电动机Three-phaseacasynchronousmotor使用维护说明书OperationandMaintenanceManua1.1极闻OVerView129、禾口/ACCePtanCeandStorage.-1.-.-.-.-.-.9.-.-.1.i.-.-.-.-.1.-.1.43安装/InStaH“”-64试运行前的准备和检三EPreparationandinspectionbeforetria1.operation.19ru6 /。r。11。nA*.*.*”.”.”*.*”.”.*.*.*”.*.*.*”,.*.*.*”.”.*.*”.”.*.*.*”.*.*.*

2、.*.*.*.”.”.”*.307 维护/Maintenance.-.-“”358 维护和检查基本知识/Basicknow1.edgeofmaintenanceandinspection-.47rUISIn*10 堆用的电动机标彻Commonmotorstandards-621.imitforBc1.assmotorwindingsis80K;F-Ieve1.motorsarea1.soassessedat80KaccordingtoB-1.eve1.standards;AccordingtotheF1.eve1.assessment,itis105K.Accordingtothecorres

3、pondingstandards,theworkingtemperaturethatB-Ieve1.insu1.ationmateria1.scanwithstandfora1.ongtimeis130X?,andF-Ieve1.insu1.ationmateria1.scanwithstand155Cfora1.ongtime.Ca1.cu1.atedbasedontheactua1.maximumoperatingambienttemperatureofthemotor,whichis40C,thea1.1.owab1.eworkingtemperatureofthemotoris:B级时

4、允许工作温度：120C(环温40X温升80)13(CA1.1.owab1.eworkingtemperatureatB-Ieve1.:120*C(ambienttemperatureof40+temperatureriseof80)130CF级时允许工作温度：145(环温40C+温升105)155CA1.1.owab1.eworkingtemperatureatF1.eve1.:145C(ambienttemperature40iC+temperaturerise105C)1551C可见B级已留有余量，F级按B级考核余量就更大，实际运行中，要判断电机温度是否过高，由于设备限制，可以用足够量程的

5、酒精温度计测量铁心温度加以粗略判断,B级V120t,F级V14577即为合格，可放心使用,接近限值时可与我们联系。Itcanbeseenthatthereisa1.readyamarginforB-Ieve1.,andthemarginforF-Ieve1.assessmentiseven1.argeraccordingtoB-Ieve1.Inactua1.operation,itisnecessarytodeterminewhetherthemotortemperatureistoohigh.Duetoequipment1.imitations,atemperaturegaugewithsu

6、fficientrangecanbeusedtomeasuretheironcoretemperatureforroughjudgment.B-Ievek120CandF-1.eve1.145CCareconsideredqua1.ifiedandcanbeusedwithconfidence.Whenapproachingthe1.imit,youcancontactus.8.3振动/vibrateB-I轴承呈椭圆形变形。/TheB-Ibearingisdeformedinane1.1.iptica1.shape.B-2转轴与铁心之间的配合在特定方向不足。/ThefitbetweentheB

7、-2shaftandtheironcoreisinsufficientinaspecificdirection.C:振动幅值在恒定转速和电压下随时间变化时，应考虑以下情况：/C:Whenthevibrationamp1.itudevarieswithtimeunderconstantspeedandvo1.tage,thefo1.1.owingsituationsshou1.dbeconsidered:C-I转子导体热涨引起轴弯曲。/C-1.rotorconductortherma1.expansioncausesshaftbending.C-2迷宫式密封与轴微接触,或与轴承在特定方向上接触，

8、/C-Z1.abyrinthsea1.isins1.ightcontactwiththeshaftorincontactwiththebearinginaspecificdirection.C-3油振荡。C3oi1.osci1.1.ation.C-4油旋涡/C-4oi1.vortex8.3.1.2电气振动/8.3.1.2E1.ectrica1.vibration这种振动是由电磁力机械谐振的结果发生的。Thisvibrationoccursasaresu1.tOfe1.ectromagneticmechanica1.resonance.A频率为电源频率的2倍时，振动由气隙不均衡、电源电压不平衡、

9、定子绕组不平衡或定子铁芯松动等引起。B频率为电源频率倍数时，振动由在定子铁芯经径向上作为锥形槽组合的结果产生的变形力引起的：C频率为转差频率的2倍时，振动由2极电机气隙不均衡、耕法芯松动或转了导条断裂产生的电磁不平衡引起的。D拍频，它是一种由与2倍转差频率重合的不平衡气隙的结果的2倍电源频率引起的拍跟振动，WhenthefrequencyofAistwicethepowerfrequency,vibrationiscausedbyunevenairgap,unba1.ancedpowersupp1.yvo1.tage,unba1.ancedstatorwinding,or1.oosestato

10、rcore.WhentheBfrequencyisamu1.tip1.eofthepowerfrequency,thevibrationiscausedbythedeformationforcegeneratedbythecombinationofconica1.s1.otsintheradia1.directionofthestatorcore.WhentheCfrequencyistwicethes1.ipfrequency,thevibrationiscausedbye1.ectromagneticimba1.anceresu1.tingfromunevenairgapofthe2po1

11、.emotor,1.ooserotorironcore,orbrokenrotorconductor.Dbeatfrequencyisabeatfrequencyvibrationcausedbytheresu1.tofanunba1.ancedairgapthatcoincideswithtwicethes1.ipfrequency,resu1.tingintwicethepowersupp1.yfrequency.8.3.2振动增大原因调查/8.3.2InvestigationintotheCausesofIncreasedVibration8.3.2.1首先将原因分成电气和机械两类，切断

12、电源.若由于电气原因则振动会消失。8.3.2.1First1.y,dividethecausesintoe1.ectrica1.andmechanica1.categories.Ifthepoweriscutoff,thevibrationwi1.1.disappearduetoe1.ectrica1.reasons.832.2检查振动是否由负载引起，断开从动机，单独转动电机.8.3.2.2Checkifthevibrationiscausedbythe1.oad,disconnectthedrivenmachine,androtatethemotorseparate1.y.8.323测量:振

13、动频率、幅值和阶段变化。8.3.2.3Measurevibrationfrequency,amp1.itude,andstagechanges.8.3.2.4检杳振动幅值是否划时间变化.8.3.2.4Checkwhetherthevibrationamp1.itudechangesovertime.8.3.2.5检查转速变化时幅值交变情况,以判定振动是否由谐振结果引起.8.3.2.5Checktheamp1.itudea1.ternationwhenthespeedchangestodeterminewhetherthevibrationiscausedbyresonanceresu1.ts8

14、.326参照泡滑剂温度、电动机内部温度、轴承温度交变情况来检查振动情况，且检查轴特性.8.3.2.6CheckthevibrationconditionandshaftcharacteristicsbyreferringtothetemperatureoftheIubricantrtheinterna1.temperatureofthemotor,andthea1.ternatingtemperatureofthebearings.8.3.2.7整理数据分析振动原因.8.3.2.7Organizedataandana1.yzethecausesofvibration.s1.idingbeari

15、ng,itwi1.1.notproducenoise.Thenoisecausedbyro1.1.ingbearingsiscomp1.ex,andFigure8showsthemaincauseofro1.1.ingbearingnoise.-麻朗哓访正第*声；由录功的!不发出的嵯逐一尖小1-革崂声算宗联网Itm市一UMMIJ1.I1.MM1.承安装到断末出机；上的铺次发柏蜘与轴承祐出的吟水戒机段籽关）图8滚动轴承发出的噪声Figure8Noiseemittedbyro1.1.ingbearings在这些噪声中，座圈噪声(具有100OHZ或以上频率的范本噪声)、滚柱脱落噪声和尖叫声都归为正常噪声其余噪声则称为异常噪声，异常噪声一般为缺陷噪声。Amongthesenoises,seatringn