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大型电机轴承座清洗、检查

来源:子昂电机维修 日期:2020-06-02 11:29:22

大型电机轴承座清洗、检查

1、轴瓦的清洗与检查  

    大型电(dian)机轴承均单独装箱运来,开箱后先用(yong)吊环螺丝将上瓦和下(xia)瓦分(fen)别取出作(zuo)好记(ji)号(hao)并(bing)用(yong)煤油清洗,用(yong)干布(bu)擦干并(bing)检查所有槽沟(gou)(gou)是否(fou)干净,有无(wu)铸(zhu)造残留(liu)砂(sha)子(zi),钨(wu)(wu)金层与瓦体(ti)结合(he)不好,划出的沟(gou)(gou)道、裂纹存在砂(sha)眼和其(qi)它掺杂物等)。若无(wu)法修复时,则要重新挂钨(wu)(wu)金。  

2、轴承座的清洗与检查  

    轴(zhou)(zhou)承(cheng)座(zuo)安装引前,也应进(jin)全面(mian)(mian)清(qing)洗检查(cha)。将轴(zhou)(zhou)承(cheng)座(zuo)内腔(qiang)用(yong)(yong)刮刀将脏物刮去,用(yong)(yong)布蘸(zhan)汽(qi)油或溶剂将脏物擦净(jing),观看有(you)无(wu)裂纹及(ji)砂眼,以(yi)防止在运行(xing)中出(chu)现渗油。轴(zhou)(zhou)承(cheng)盖与轴(zhou)(zhou)承(cheng)座(zuo)接合面(mian)(mian),轴(zhou)(zhou)承(cheng)座(zuo)与轴(zhou)(zhou)承(cheng)挡油圈结合面(mian)(mian)应进(jin)行(xing)研(yan)刮配合,并用(yong)(yong)塞尺检查(cha),其(qi)间隙不得大(da)于0.03毫米。放置轴(zhou)(zhou)承(cheng)座(zuo)的(de)底(di)板表面(mian)(mian)也要(yao)清(qing)理干净(jing),不应有(you)碰伤(shang)、锈(xiu)蚀和毛刺。紧固轴(zhou)(zhou)承(cheng)座(zuo)的(de)螺(luo)钉(ding)(ding)及(ji)座(zuo)板螺(luo)纹均要(yao)他细检查(cha),并试拧(ning)螺(luo)钉(ding)(ding)检查(cha)是否过紧或秃扣。  

3、轴承绝缘结构  

    轴承和底板(ban)之(zhi)间必须垫(dian)(dian)(dian)(dian)以(yi)绝(jue)(jue)缘(yuan)(yuan)(yuan)垫(dian)(dian)(dian)(dian)板(ban)或(huo)金属垫(dian)(dian)(dian)(dian)片(pian),金属垫(dian)(dian)(dian)(dian)片(pian)用(yong)来调(diao)(diao)整座(zuo)水平位置(zhi)。以(yi)调(diao)(diao)整该(gai)电(dian)机和相(xiang)联结(jie)的(de)另一台电(dian)机或(huo)机械的(de)相(xiang)对位置(zhi)。金属垫(dian)(dian)(dian)(dian)片(pian)是由0.08~3毫(hao)(hao)米(mi)(mi)的(de)金属薄板(ban)制(zhi)成(cheng)。绝(jue)(jue)缘(yuan)(yuan)(yuan)垫(dian)(dian)(dian)(dian)板(ban)是由布(bu)质层(ceng)压板(ban)或(huo)玻(bo)(bo)璃丝层(ceng)压板(ban)制(zhi)成(cheng)。放置(zhi)绝(jue)(jue)缘(yuan)(yuan)(yuan)垫(dian)(dian)(dian)(dian)板(ban)的(de)目的(de)主要是防止轴电(dian)流的(de)危害(hai)。绝(jue)(jue)缘(yuan)(yuan)(yuan)垫(dian)(dian)(dian)(dian)板(ban)应(ying)比轴承座(zuo)每边宽出5~10毫(hao)(hao)米(mi)(mi),厚度(du)(du)为(wei)3~10毫(hao)(hao)米(mi)(mi)。除在轴承和底板(ban)之(zhi)间放置(zhi)绝(jue)(jue)缘(yuan)(yuan)(yuan)垫(dian)(dian)(dian)(dian)板(ban)之(zhi)外(wai),同时(shi)将(jiang)螺钉和稳钉也应(ying)加以(yi)绝(jue)(jue)缘(yuan)(yuan)(yuan)。绝(jue)(jue)缘(yuan)(yuan)(yuan)垫(dian)(dian)(dian)(dian)圈用(yong)厚度(du)(du)2~5毫(hao)(hao)米(mi)(mi)玻(bo)(bo)璃丝布(bu)板(ban)制(zhi)成(cheng),其外(wai)径比铁垫(dian)(dian)(dian)(dian)圈外(wai)径大4~5毫(hao)(hao)米(mi)(mi)。与轴承座(zuo)相(xiang)接(jie)的(de)油管(guan)接(jie)盘绝(jue)(jue)缘(yuan)(yuan)(yuan)垫(dian)(dian)(dian)(dian)可(ke)用(yong)厚度(du)(du)为(wei)1~2毫(hao)(hao)米(mi)(mi)橡(xiang)胶板(ban)制(zhi)成(cheng)。绝(jue)(jue)缘(yuan)(yuan)(yuan)的(de)轴承座(zuo)安装后应(ying)检查对地(di)绝(jue)(jue)缘(yuan)(yuan)(yuan)电(dian)阻(zu),用(yong)500伏(fu)兆欧表(biao)测(ce)量,其阻(zu)值应(ying)不(bu)小于1兆欧。