起重機制動器的安全檢查

　　起重(zhong)機(ji)制動器的安(an)全檢查

　　起重(zhong)機制(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)(dong)器(qi)(qi)制(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)(dong)帶的檢查，正常(chang)運轉的制(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)(dong)器(qi)(qi)，不允許(xu)鉚釘露出制(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)(dong)帶。制(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)(dong)輪工作(zuo)(zuo)邊(bian)面不光滑，或(huo)者制(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)(dong)輪與制(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)(dong)帶配合(he)不良(liang)時(shi)，都(dou)會產(chan)生(sheng)嚴(yan)重(zhong)的磨損，從而使(shi)制(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)(dong)力矩減少，甚至(zhi)使(shi)制(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)(dong)器(qi)(qi)失(shi)去作(zuo)(zuo)用。當制(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)(dong)帶磨損達到50%時(shi)，應更換(huan)新制(zhi)(zhi)(zhi)(zhi)動(dong)(dong)(dong)(dong)(dong)(dong)帶。

　　制(zhi)(zhi)動(dong)(dong)器(qi)整體檢(jian)查(cha)，首先(xian)檢(jian)查(cha)整個起重(zhong)機制(zhi)(zhi)動(dong)(dong)器(qi)是(shi)否靈活(huo)，不得有卡塞現象。電(dian)磁鐵的(de)動(dong)(dong)、靜鐵芯應接觸良好。

　　檢查方法：用(yong)(yong)扳手壓電磁(ci)鐵(tie)鐵(tie)芯(短行程(cheng))，觀察(cha)各部(bu)分的活動(dong)(dong)是否(fou)靈活，制(zhi)動(dong)(dong)輪與(yu)兩個制(zhi)動(dong)(dong)瓦(wa)間(jian)隙是否(fou)相(xiang)等;用(yong)(yong)手搖(yao)晃制(zhi)動(dong)(dong)臂，觀察(cha)其銷(xiao)軸磨(mo)損情況，銷(xiao)軸磨(mo)損量達名義直徑的3%～5%時，應(ying)更(geng)換新件或修補;長(chang)行程(cheng)制(zhi)動(dong)(dong)器要特(te)別注(zhu)意檢查動(dong)(dong)靜鐵(tie)芯之間(jian)部(bu)分，將底框架所(suo)涉及的基礎(chu)水泥保護層(ceng)去(qu)掉，同時采用(yong)(yong)特(te)種水泥，對墊鐵(tie)部(bu)分進行錨(mao)固，更(geng)換限位座(zuo)及各拉桿(gan)、采用(yong)(yong)防松拉桿(gan)、更(geng)換新型過渡器等。

　　起重機制動器制(zhi)動輪的(de)檢查，制(zhi)動輪不得有(you)缺陷(xian)(xian)和裂紋。在使用(yong)過程中，制(zhi)動輪表面如果出(chu)現大于2mm的(de)凹陷(xian)(xian)或(huo)抓痕，則(ze)應將制(zhi)動輪按標準重新加工。

　　制(zhi)動(dong)輪的錐孔與軸不得有相(xiang)對(dui)轉動(dong)，如發現有相(xiang)對(dui)轉動(dong)，則應(ying)拆開檢(jian)查軸鍵是否被擠扁或鍵槽(cao)是否擴大。制(zhi)動(dong)輪工(gong)作(zuo)表(biao)面的工(gong)作(zuo)溫度不應(ying)超(chao)過200℃。工(gong)作(zuo)表(biao)面要經常用(yong)煤(mei)油清(qing)洗，防止由(you)于油污使制(zhi)動(dong)輪打滑造成事故。

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