bob足彩

电机维修知识

谈谈三相异步电动机的维护周期及注意事项2022-04-20

一(yi)般情况下,小修(xiu)、中修(xiu)、大修(xiu)必须在维修(xiu)周(zhou)期内按照(zhao)维修(xiu)标准进行(xing)(xing)。如果没有(you)条件(jian),判(pan)断维修(xiu)周(zhou)期可(ke)以延(yan)长,分(fen)厂技术人员应采取(qu)预防措施,并报设(she)备(bei)部批准。最长期限不(bu)得(de)超过本办法(fa)规定的(de)(de)维修(xiu)期限的(de)(de)两(liang)倍。三相异(yi)步电(dian)动(dong)机维修(xiu)的(de)(de)主要(yao)目的(de)(de)是及时消除电(dian)动(dong)机的(de)(de)缺(que)陷(xian)和(he)(he)(he)隐患,恢(hui)复(fu)和(he)(he)(he)提(ti)高电(dian)动(dong)机原有(you)的(de)(de)工作(zuo)性能和(he)(he)(he)设(she)计水平(ping),保证电(dian)动(dong)机安全可(ke)靠运行(xing)(xing)。  一(yi),三相异(yi)步电(dian)动(dong)机维护的(de)(de)基本要(yao)求  1.对于更换了(le)所有(you)定子(zi)和(he)(he)(he)转子(zi)绕(rao)组的(de)(de)电(dian)机,新(xin)线圈的(de)(de)绝缘...

常见在变频器使用过程中的电机保护方法 2021-12-21

随(sui)着变频器(qi)(qi)对(dui)工(gong)业(ye)自(zi)动化(hua)控制、电(dian)机节能(neng)的(de)(de)作(zuo)用越来越大(da),使得(de)工(gong)业(ye)生产中(zhong)几乎(hu)离不(bu)开(kai)变频器(qi)(qi),并成(cheng)为其(qi)中(zhong)不(bu)可(ke)缺少的(de)(de)部(bu)分。但与其(qi)同时(shi),变频器(qi)(qi)在使用过程(cheng),会时(shi)不(bu)时(shi)对(dui)电(dian)机损伤的(de)(de)现(xian)象,就(jiu)让人感到措手不(bu)及。为此,华(hua)博星科技(ji)在这(zhei)里为大(da)家讲解在变频器(qi)(qi)使用过程(cheng)中(zhong)的(de)(de)电(dian)机保护(hu)方法(fa):1、在变频器(qi)(qi)的(de)(de)输出端(duan)安装(zhuang)电(dian)抗(kang)器(qi)(qi):这(zhei)个措施(shi)最常用,但是(shi)(shi)需要(yao)注意的(de)(de)是(shi)(shi),这(zhei)个方法(fa)对(dui)于(yu)较(jiao)短的(de)(de)电(dian)缆(lan)(30米以下(xia))有(you)一定效果,但是(shi)(shi)有(you)时(shi)效果不(bu)够理想。2、在变频器(qi)(qi)的(de)(de)输...

高压电动机应装设的保护2021-08-21

1)电(dian)(dian)流速断(duan)保(bao)(bao)护--电(dian)(dian)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)机(ji)(ji)(ji)定(ding)子绕组相间(jian)短路(lu)的(de)(de)保(bao)(bao)护,一(yi)般用于(yu)(yu)(yu)2000kW以(yi)下(xia)的(de)(de)电(dian)(dian)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)机(ji)(ji)(ji),动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)作于(yu)(yu)(yu)跳(tiao)闸.2)纵联差动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)保(bao)(bao)护--对于(yu)(yu)(yu)2000kW及(ji)以(yi)上(shang)的(de)(de)电(dian)(dian)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)机(ji)(ji)(ji),或2000kW以(yi)下(xia)电(dian)(dian)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)机(ji)(ji)(ji)的(de)(de)电(dian)(dian)流速断(duan)保(bao)(bao)护的(de)(de)灵敏(min)度(du)满足不了(le)要求(qiu)时(shi),采(cai)用差动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)保(bao)(bao)护来对电(dian)(dian)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)机(ji)(ji)(ji)内部及(ji)引出线相间(jian)短路(lu)进行保(bao)(bao)护,动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)作于(yu)(yu)(yu)跳(tiao)闸.3)过(guo)(guo)负(fu)载保(bao)(bao)护--预防电(dian)(dian)动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)机(ji)(ji)(ji)所拖动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)的(de)(de)生产机(ji)(ji)(ji)械(xie)过(guo)(guo)负(fu)荷而引起的(de)(de)过(guo)(guo)电(dian)(dian)流,动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)作于(yu)(yu)(yu)信(xin)号或带一(yi)定(ding)时(shi)限动(dong)(dong)(dong)(dong)(dong)(dong)(dong)(dong)作于(yu)(yu)(yu)跳(tiao)闸.4)单相接地保(bao)(bao)护--在(zai)小接地电(dian)(dian)流系统中,当接地...

电机的使用温度标准2021-07-23

一般电机操作规程(cheng)规定,滚动轴承(cheng)(cheng)最(zui)(zui)(zui)高温(wen)(wen)度(du)不(bu)超过(guo)95摄(she)(she)氏度(du),滑动轴承(cheng)(cheng)最(zui)(zui)(zui)高温(wen)(wen)度(du)不(bu)超过(guo)80摄(she)(she)氏度(du)。并(bing)且温(wen)(wen)升不(bu)超过(guo)55摄(she)(she)氏度(du)(温(wen)(wen)升为(wei)轴承(cheng)(cheng)温(wen)(wen)度(du)减去测试(shi)时的(de)环境温(wen)(wen)度(du));楼(lou)上给出的(de)是(shi)(shi)电机本体(ti)的(de)温(wen)(wen)度(du),不(bu)是(shi)(shi)轴承(cheng)(cheng)的(de)温(wen)(wen)度(du)。  下面是(shi)(shi)轴承(cheng)(cheng)工厂店为(wei)您整理(li)的(de)具体(ti)的(de)电机轴承(cheng)(cheng)温(wen)(wen)度(du)标准(zhun):  GB3215-82 4.4.1 泵工作期间,轴承(cheng)(cheng)最(zui)(zui)(zui)高温(wen)(wen)度(du)不(bu)超过(guo)80度(du)。  JB/T5294-91 3.2.9.2 轴承(cheng)(cheng)温(wen)(wen)升不(bu)得(de)超过(guo)环境温(wen)(wen)度(du)40度(du),最(zui)(zui)(zui)高温(wen)(wen)度(du)不(bu)得(de)超过(guo)80度(du)。  JB/T6439-92 4...

直流电机会不会被交流电机取代2020-06-17

最近有人在(zai)热(re)议直(zhi)流(liu)(liu)(liu)电(dian)(dian)机(ji)(ji)(ji)会被交(jiao)(jiao)(jiao)流(liu)(liu)(liu)电(dian)(dian)机(ji)(ji)(ji)取(qu)代(dai),那么直(zhi)流(liu)(liu)(liu)电(dian)(dian)机(ji)(ji)(ji)真(zhen)的(de)(de)会被取(qu)代(dai)吗?子昂直(zhi)流(liu)(liu)(liu)电(dian)(dian)机(ji)(ji)(ji)维修厂家对这个问(wen)题(ti)做出(chu)如(ru)下分析。1、取(qu)代(dai)直(zhi)流(liu)(liu)(liu)电(dian)(dian)机(ji)(ji)(ji)是(shi)(shi)(shi)有可(ke)能的(de)(de),但是(shi)(shi)(shi)这个范围只限在(zai)工频(pin)(pin)直(zhi)驱电(dian)(dian)机(ji)(ji)(ji),随着近几(ji)十(shi)年的(de)(de)电(dian)(dian)力电(dian)(dian)子变频(pin)(pin)调速和新的(de)(de)交(jiao)(jiao)(jiao)流(liu)(liu)(liu)电(dian)(dian)机(ji)(ji)(ji)控制理论的(de)(de)出(chu)现(xian)(xian),直(zhi)流(liu)(liu)(liu)电(dian)(dian)机(ji)(ji)(ji)确实有被取(qu)代(dai)的(de)(de)现(xian)(xian)象,如(ru)大(da)型机(ji)(ji)(ji)床炼钢设备(bei)、水泵等。2、不(bu)管(guan)是(shi)(shi)(shi)直(zhi)流(liu)(liu)(liu)电(dian)(dian)机(ji)(ji)(ji)还是(shi)(shi)(shi)交(jiao)(jiao)(jiao)流(liu)(liu)(liu)电(dian)(dian)机(ji)(ji)(ji),内部(bu)磁(ci)(ci)场都需(xu)要换(huan)向,直(zhi)流(liu)(liu)(liu)电(dian)(dian)机(ji)(ji)(ji)靠的(de)(de)是(shi)(shi)(shi)机(ji)(ji)(ji)械换(huan)向,交(jiao)(jiao)(jiao)流(liu)(liu)(liu)电(dian)(dian)机(ji)(ji)(ji)却(que)可(ke)以轻易的(de)(de)产生旋转磁(ci)(ci)场,机(ji)(ji)(ji)械...

大型防爆电机运行振动过大原因2020-06-03

一(yi)、一(yi)般来讲(jiang),大型电(dian)机维修时,电(dian)机振动(dong)(dong)是(shi)(shi)由于(yu)转(zhuan)(zhuan)动(dong)(dong)部分不(bu)(bu)平(ping)衡(heng)(heng)、机械故障(zhang)或电(dian)磁方面(mian)的(de)(de)原(yuan)因(yin)引起的(de)(de)。1、转(zhuan)(zhuan)动(dong)(dong)部分不(bu)(bu)平(ping)衡(heng)(heng)主(zhu)要是(shi)(shi)转(zhuan)(zhuan)子、耦(ou)合器、联轴器、传动(dong)(dong)轮(lun)(制(zhi)动(dong)(dong)轮(lun))不(bu)(bu)平(ping)衡(heng)(heng)引起的(de)(de)。处理方法是(shi)(shi)先找(zhao)好(hao)转(zhuan)(zhuan)子平(ping)衡(heng)(heng)。如(ru)果(guo)有大型传动(dong)(dong)轮(lun)、制(zhi)动(dong)(dong)轮(lun)、耦(ou)合器、联轴器,应(ying)与转(zhuan)(zhuan)子分开单独(du)找(zhao)好(hao)平(ping)衡(heng)(heng)。再有就(jiu)是(shi)(shi)转(zhuan)(zhuan)动(dong)(dong)部分机械松动(dong)(dong)造成的(de)(de)。如(ru):铁心支(zhi)架松动(dong)(dong),斜键、销钉失效松动(dong)(dong),转(zhuan)(zhuan)子绑(bang)扎不(bu)(bu)紧都会造成转(zhuan)(zhuan)动(dong)(dong)部分不(bu)(bu)平(ping)衡(heng)(heng)。2、机械部分故障(zhang)主(zhu)要有以下几点:(...

直流电机选用原则2020-05-11

直流(liu)电(dian)(dian)机(ji)(ji)(ji)(ji)(ji)应用在不同的(de)行业中有不同的(de)规(gui)格以及种类,所(suo)以如何选择(ze)合(he)(he)适的(de)产品是非常(chang)重(zhong)要(yao)的(de),只有合(he)(he)理选择(ze)才(cai)能使其更大(da)的(de)发挥作用,所(suo)以要(yao)几(ji)个(ge)选用原则(ze)是需(xu)要(yao)用户了解的(de)。1、合(he)(he)理选择(ze)电(dian)(dian)机(ji)(ji)(ji)(ji)(ji)的(de)功(gong)率电(dian)(dian)机(ji)(ji)(ji)(ji)(ji)输出(chu)的(de)最(zui)大(da)功(gong)率是有限度的(de),如果电(dian)(dian)机(ji)(ji)(ji)(ji)(ji)的(de)功(gong)率选择(ze)过(guo)小,负(fu)载超过(guo)了电(dian)(dian)机(ji)(ji)(ji)(ji)(ji)的(de)额定输出(chu)功(gong)率就会发生电(dian)(dian)机(ji)(ji)(ji)(ji)(ji)过(guo)载,过(guo)载时会出(chu)现电(dian)(dian)机(ji)(ji)(ji)(ji)(ji)发热、振动(dong)、转速下(xia)降、声音异(yi)常(chang)等现象(xiang),严重(zhong)过(guo)载时,将会烧(shao)毁电(dian)(dian)机(ji)(ji)(ji)(ji)(ji)。而功(gong)率过(guo)大(da),则(ze)会造成(cheng)经(jing)济浪费。因(yin)此(ci)合(he)(he)理选择(ze)电(dian)(dian)...

直流电机维修换向器修理后检查方法2020-04-24

直流电机维(wei)修(xiu)换(huan)向(xiang)(xiang)(xiang)器修(xiu)理后检(jian)查方法:1、用(yong)小(xiao)铁(tie)锤轻敲换(huan)向(xiang)(xiang)(xiang)片(pian),依据发出(chu)的声音(yin)来判断安(an)装是否(fou)牢(lao)固(gu)。若(ruo)发出(chu)较清脆的声音(yin),表明(ming)换(huan)向(xiang)(xiang)(xiang)器装配牢(lao)固(gu);如果发出(chu)空壳声,则表明(ming)换(huan)向(xiang)(xiang)(xiang)器松(song)弛,要重新装配。2、检(jian)查换(huan)向(xiang)(xiang)(xiang)片(pian)的轴(zhou)向(xiang)(xiang)(xiang)平(ping)行度,使换(huan)向(xiang)(xiang)(xiang)片(pian)沿轴(zhou)线的偏斜(xie)度不超过片(pian)间云(yun)母片(pian)的厚度,否(fou)则会造成换(huan)向(xiang)(xiang)(xiang)不良。3、做对地耐压(ya)试验,试验电压(ya)通常为两(liang)倍的额(e)定电压(ya)加1000V,持续时(shi)间为1min。4、用(yong)220V检(jian)验灯逐片(pian)检(jian)查片(pian)间是否(fou)短路,若(ruo)有(you)短路应加以排除。...

无刷直流电机运行特性2020-03-25

无(wu)刷直(zhi)流电(dian)机(ji)(ji)(ji)的(de)运行(xing)特(te)性(xing)是指电(dian)机(ji)(ji)(ji)在起动(dong)、正常工(gong)作和调速(su)等情(qing)况下,电(dian)机(ji)(ji)(ji)外部各可(ke)测物理量之间(jian)的(de)关(guan)系。电(dian)机(ji)(ji)(ji)是一种输入电(dian)功率、输出机(ji)(ji)(ji)械功率的(de)原动(dong)机(ji)(ji)(ji)械。因(yin)此,我们最关(guan)心(xin)的(de)是它的(de)转(zhuan)(zhuan)矩、转(zhuan)(zhuan)速(su),以及转(zhuan)(zhuan)矩和转(zhuan)(zhuan)速(su)随输入电(dian)压、电(dian)流、负载变(bian)(bian)化(hua)而变(bian)(bian)化(hua)的(de)规律。据此,电(dian)机(ji)(ji)(ji)的(de)运行(xing)特(te)性(xing)可(ke)分为起动(dong)特(te)性(xing)、工(gong)作特(te)性(xing)、机(ji)(ji)(ji)械特(te)性(xing)和调速(su)特(te)性(xing)。讨论各种电(dian)机(ji)(ji)(ji)的(de)运行(xing)特(te)性(xing)时,-般(ban)都从转(zhuan)(zhuan)速(su)公(gong)式(shi)、电(dian)动(dong)势平(ping)衡方程式(shi)、转(zhuan)(zhuan)矩公(gong)式(shi)和转(zhuan)(zhuan)矩平(ping)衡方程式(shi)出发。式(shi)中,σ是电(dian)源...

现代电机如何发展?六大方向,三大关键技术2020-02-21

现(xian)(xian)(xian)(xian)代(dai)电(dian)机(ji)(ji)不再是只是简单(dan)(dan)执行任(ren)务的(de)(de)单(dan)(dan)独的(de)(de)零件,而是成为一个(ge)(ge)全面性的(de)(de)系(xi)(xi)统,可(ke)以(yi)说现(xian)(xian)(xian)(xian)代(dai)电(dian)机(ji)(ji)是整个(ge)(ge)机(ji)(ji)电(dian)体(ti)系(xi)(xi)的(de)(de)神经中(zhong)枢。现(xian)(xian)(xian)(xian)代(dai)电(dian)机(ji)(ji)可(ke)以(yi)为整个(ge)(ge)机(ji)(ji)电(dian)体(ti)系(xi)(xi)提供能源,也就是说现(xian)(xian)(xian)(xian)代(dai)电(dian)机(ji)(ji)是动力中(zhong)心;现(xian)(xian)(xian)(xian)代(dai)电(dian)机(ji)(ji)也可(ke)以(yi)起到调(diao)节(jie)、平衡、控制整个(ge)(ge)机(ji)(ji)电(dian)系(xi)(xi)统的(de)(de)作(zuo)用。甚(shen)至很多现(xian)(xian)(xian)(xian)代(dai)电(dian)机(ji)(ji)兼具(ju)这两种功(gong)能。如此(ci)强大且全面的(de)(de)功(gong)能必然对现(xian)(xian)(xian)(xian)代(dai)电(dian)机(ji)(ji)提出更高要(yao)求,这些要(yao)求不仅仅体(ti)现(xian)(xian)(xian)(xian)在(zai)现(xian)(xian)(xian)(xian)代(dai)电(dian)机(ji)(ji)本(ben)身的(de)(de)设计和(he)生(sheng)产,而且体(ti)现(xian)(xian)(xian)(xian)在(zai)现(xian)(xian)(xian)(xian)代(dai)电(dian)机(ji)(ji)生(sheng)产出的(de)(de)产品(pin)的(de)(de)经济性、应用性...

直流电机运行过程震动原因2020-01-16

永磁(ci)直流(liu)(liu)电(dian)(dian)(dian)机(ji)(ji)运行过程震动(dong)原因:第(di)一(yi)、是否(fou)三相电(dian)(dian)(dian)压平衡第(di)一(yi)张支票,并拧紧(jin)地(di)脚螺(luo)栓(shuan),基础松(song)动(dong)检查(不(bu)会被地(di)面松(song)动(dong),啊(a))功率测试,如果无效,下一(yi)步。第(di)二(er)、释放负荷(he)(皮带,齿轮等),永磁(ci)直流(liu)(liu)电(dian)(dian)(dian)机(ji)(ji) 微(wei)型减速(su)电(dian)(dian)(dian)机(ji)(ji) 永磁(ci)永磁(ci)直流(liu)(liu)电(dian)(dian)(dian)机(ji)(ji) 永磁(ci)直流(liu)(liu)电(dian)(dian)(dian)机(ji)(ji)调(diao)速(su)器 微(wei)电(dian)(dian)(dian)机(ji)(ji)电(dian)(dian)(dian)源测试,以(yi)确定它是否(fou)是由不(bu)平衡负载,如果是这(zhei)样(yang),调(diao)整负荷(he),与DC电(dian)(dian)(dian)机(ji)(ji)轴(zhou)平行的纵向以(yi)便。如果无效,下一(yi)步。第(di)三、永磁(ci)直流(liu)(liu)电(dian)(dian)(dian)机(ji)(ji)维修师检查螺(luo)丝盖的密封性,是按对(dui)角顺(shun)序(xu)...

直流无刷电机噪声处理方法2019-12-25

所(suo)谓(wei)直流(liu)无刷电机(ji)的(de)噪(zao)声(sheng)解(jie)决方法(fa),就是(shi)要(yao)(yao)综合考(kao)虑(lv)该(gai)设备的(de)运转情(qing)况,具(ju)体来说,子昂(ang)电机(ji)维(wei)修介绍的(de)以下几(ji)个(ge)方面(mian),以供大家(jia)学(xue)习(xi)参(can)考(kao)。1、减振(zhen)和阻断(duan)措(cuo)施(shi)减速机(ji)在安装时,应(ying)尽量避免机(ji)身与基础支撑及连接(jie)(jie)件之间发生(sheng)共振(zhen),产(chan)生(sheng)噪(zao)声(sheng),直流(liu)无刷电机(ji)节能减速电机(ji)内(nei)部常(chang)常(chang)会发生(sheng)一只(zhi)或几(ji)只(zhi)齿轮在某些速度(du)范围内(nei)产(chan)生(sheng)共振(zhen)。2、除设计原(yuan)因外,与安装时未(wei)经(jing)空(kong)试(shi)揪出共振(zhen)位置,并采取相应(ying)减振(zhen)或阻断(duan)措(cuo)施(shi)有直接(jie)(jie)关系,某些要(yao)(yao)求低传动噪(zao)声(sheng)和振(zhen)动的(de)...

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