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电机(ji)滑(hua)(hua)动(dong)(dong)(dong)(dong)轴(zhou)承(cheng)(cheng)(cheng)分(fen)为带(或不(bu)带)衬油(you)(you)环润滑(hua)(hua)的整体式(shi)(shi)滑(hua)(hua)动(dong)(dong)(dong)(dong)轴(zhou)承(cheng)(cheng)(cheng)、套筒(tong)式(shi)(shi)滑(hua)(hua)动(dong)(dong)(dong)(dong)轴(zhou)承(cheng)(cheng)(cheng)及(ji)带衬油(you)(you)环润滑(hua)(hua)的分(fen)解(jie)式(shi)(shi)滑(hua)(hua)动(dong)(dong)(dong)(dong)轴(zhou)承(cheng)(cheng)(cheng)等。整体式(shi)(shi)滑(hua)(hua)动(dong)(dong)(dong)(dong)轴(zhou)承(cheng)(cheng)(cheng)一般用(yong)于(yu)小型电机(ji),分(fen)解(jie)式(shi)(shi)滑(hua)(hua)动(dong)(dong)(dong)(dong)轴(zhou)承(cheng)(cheng)(cheng)则(ze)用(yong)于(yu)大中(zhong)型电机(ji)。滑(hua)(hua)动(dong)(dong)(dong)(dong)轴(zhou)承(cheng)(cheng)(cheng)的轴(zhou)颈包在(zai)轴(zhou)承(cheng)(cheng)(cheng)中(zhong)间(jian)作相对滑(hua)(hua)动(dong)(dong)(dong)(dong),依靠轴(zhou)承(cheng)(cheng)(cheng)中(zhong)的润滑(hua)(hua)油(you)(you)膜形成(cheng)半(ban)液体、半(ban)干性(xing)摩擦。因此,在(zai)缺润滑(hua)(hua)脂的情况下极易造成(cheng)轴(zhou)承(cheng)(cheng)(cheng)严重磨损,若不(bu)及(ji)时停车修理会使轴(zhou)承(cheng)(cheng)(cheng)温度升高而导致合(he)金熔化,损伤轴(zhou)颈或使电机(ji)定子(zi)、转子(zi)相擦。
拆卸滑(hua)动(dong)轴(zhou)承(cheng)(cheng)时,应先将(jiang)(jiang)端(duan)盖油箱内(nei)的(de)(de)(de)机油倒出(chu)(chu)。对于(yu)套(tao)(tao)(tao)筒式滑(hua)动(dong)轴(zhou)承(cheng)(cheng),要将(jiang)(jiang)其外(wai)面(mian)的(de)(de)(de)紧固螺(luo)丝拧(ning)松(song),再(zai)把端(duan)盖的(de)(de)(de)止(zhi)口面(mian)朝(chao)上平(ping)放(突缘(yuan)在(zai)端(duan)盖内(nei)侧的(de)(de)(de)套(tao)(tao)(tao)筒式滑(hua)动(dong)轴(zhou)承(cheng)(cheng)止(zhi)口面(mian)应朝(chao)下放),在(zai)端(duan)盖下面(mian)垫上套(tao)(tao)(tao)管(guan)(注意套(tao)(tao)(tao)管(guan)应放到轴(zhou)承(cheng)(cheng)外(wai)面(mian),以(yi)防折断油环或卡住轴(zhou)承(cheng)(cheng)),然后将(jiang)(jiang)金(jin)属棒顶在(zai)轴(zhou)承(cheng)(cheng)的(de)(de)(de)内(nei)套(tao)(tao)(tao)圈上,用手锤将(jiang)(jiang)轴(zhou)承(cheng)(cheng)敲(qiao)出(chu)(chu)。
修理滑动轴(zhou)承(cheng)时,先在轴(zhou)承(cheng)的磨损表面浇(jiao)一层铅(qian),再镗成正确的孔径(jing).具体做法如下:
在轴(zhou)(zhou)(zhou)承(cheng)(cheng)浇铅(qian)前先在轴(zhou)(zhou)(zhou)承(cheng)(cheng)内(nei)孔(kong)表面(mian)车(che)或凿出截面(mian)为燕尾形(xing)的(de)槽,以使浇上(shang)(shang)的(de)铅(qian)与轴(zhou)(zhou)(zhou)承(cheng)(cheng)体牢(lao)固地结合在一(yi)起。再在轴(zhou)(zhou)(zhou)承(cheng)(cheng)内(nei)表 面(mian)挂(gua)(gua)锡(xi)(xi),并趁锡(xi)(xi)尚(shang)未完全凝固前立(li)即浇铅(qian)。挂(gua)(gua)锡(xi)(xi)前应在要挂(gua)(gua)锡(xi)(xi)的(de)表面(mian)抹一(yi)层盐酸(suan)或硫酸(suan),再用(yong)(yong)热水冲洗、晾干。挂(gua)(gua)锡(xi)(xi)时先用(yong)(yong)喷灯将轴(zhou)(zhou)(zhou)承(cheng)(cheng)加热至(zhi)焊(han)锡(xi)(xi)熔(rong)化温度(du)250-270"'C,然后涂上(shang)(shang)一(yi)层氯化锌溶液,再撒上(shang)(shang)一(yi)层氯化钱粉即可挂(gua)(gua)锡(xi)(xi)。浇铅(qian)时要在轴(zhou)(zhou)(zhou)承(cheng)(cheng)内(nei)放一(yi)只(zhi)直径略小于轴(zhou)(zhou)(zhou)颈的(de)泥芯,将熔(rong)融的(de)铅(qian)液浇入泥芯与轴(zhou)(zhou)(zhou)承(cheng)(cheng)孔(kong)壁(bi)之间的(de)空隙中。
在青铜或铸(zhu)钢轴(zhou)承(cheng)上(shang)(shang)浇铅时,不需车或凿(zao)燕(yan)尾槽,但要挂锡(xi)。轴(zhou)承(cheng)撞好孔后,为使润滑脂流到轴(zhou)颈的四(si)周,应在孔壁(bi)上(shang)(shang) 车或凿(zao)出(chu)油槽。油槽形状(zhuang)有斜纹、螺纹、曲(qu)纹等多(duo)种(zhong)。油槽尺寸与轴(zhou)颈直径相关。