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挖掘機發動機過熱怎樣處理維修常識了解

2019/8/23



　　1挖掘機維護修(xiu)理之油箱污物的清除。
　　（1）吹洗(xi)法，即在油(you)(you)(you)(you)箱中(zhong)留存(cun)部分柴(chai)(chai)油(you)(you)(you)(you)，然后將19.6～29.4KPa的(de)(de)壓縮(suo)空氣用塑料管通入油(you)(you)(you)(you)箱底(di)部，使柴(chai)(chai)油(you)(you)(you)(you)翻騰而進行(xing)清(qing)洗(xi)，并不斷變換氣管下端的(de)(de)位(wei)置(zhi)和方向使整個油(you)(you)(you)(you)箱都清(qing)洗(xi)到(dao)，吹洗(xi)后立即放出油(you)(you)(you)(you)箱的(de)(de)柴(chai)(chai)油(you)(you)(you)(you)，挖掘（excavate)機修理使懸浮在油(you)(you)(you)(you)中(zhong)的(de)(de)雜質(zhi)隨柴(chai)(chai)油(you)(you)(you)(you)流(liu)出，如(ru)流(liu)出的(de)(de)柴(chai)(chai)油(you)(you)(you)(you)較臟，用上法再(zai)次清(qing)洗(xi)，直到(dao)放出的(de)(de)油(you)(you)(you)(you)不含雜質(zhi)為止。
　　（2）蒸氣法，放盡(jin)柴(chai)油(you)(you)(you)，拆下油(you)(you)(you)箱(xiang)(xiang)，然后往(wang)柴(chai)油(you)(you)(you)箱(xiang)(xiang)內(nei)加注大半(ban)箱(xiang)(xiang)水(shui)(shui)(shui)(shui)，將蒸氣用導管從加油(you)(you)(you)口導入(ru)水(shui)(shui)(shui)(shui)中(zhong)，使柴(chai)油(you)(you)(you)箱(xiang)(xiang)內(nei)的(de)水(shui)(shui)(shui)(shui)沸(fei)騰(teng)1h左右，這樣，粘附在箱(xiang)(xiang)內(nei)壁上的(de)膠質和(he)殘存的(de)柴(chai)油(you)(you)(you)分子即可溶于水(shui)(shui)(shui)(shui)中(zhong)，質量(liang)輕的(de)臟物(wu)便挖(wa)掘機維護(hu)修理浮于水(shui)(shui)(shui)(shui)面并(bing)被沖走，這樣連續兩(liang)次，柴(chai)油(you)(you)(you)箱(xiang)(xiang)便可沖洗干凈(jing)。
　　（3）溶劑法，用(yong)(yong)熱(re)水(shui)清洗挖掘（excavate)機柴油(you)箱，再用(yong)(yong)壓縮空氣吹干，以清除其內部(bu)的柴油(you)蒸氣，最(zui)后再將柴油(you)箱放入(ru)含(han)有(you)(you)10％氫氧(yang)(Oxygen)化(hua)鈉(Sodium)的水(shui)溶液(ye)內浸洗，浸洗后用(yong)(yong)清水(shui)沖(chong)洗柴油(you)箱內部(bu)和外部(bu)，如發現外部(bu)有(you)(you)銹蝕(shi)，則用(yong)(yong)鋼(gang)絲刷刷凈。修理挖掘機業的挖(wa)(wa)掘機維修廠(chang)，修理(li)挖(wa)(wa)掘機冒黑煙,水溫高(gao),難啟動(dong),動(dong)作慢,憋車故障，專業技術團隊,修理(li)各種(zhong)品牌挖(wa)(wa)掘機疑難故障。維修挖掘機挖(wa)掘機(ji)(ji)的結構原理、拆(chai)卸和安裝(zhuang) 方法、故障診(zhen)(zhen)斷(duan)和排除(chu)方法，尤(you)其對使(shi)用中帶普遍性和典型性的故障診(zhen)(zhen)斷(duan)、排除(chu)方法以(yi)及挖(wa)掘機(ji)(ji)零部件的拆(chai)裝(zhuang)。挖掘機修理挖掘(jue)機(ji)維(wei)修(xiu)(xiu)(xiu)動作緩慢、熱機(ji)無力(li)、高溫、憋(bie)車、動作不(bu)協(xie)調、液壓泵、閥電腦檢測、挖掘(jue)機(ji)修(xiu)(xiu)(xiu)理發(fa)動機(ji)燒機(ji)油、下(xia)排氣大(da)、整機(ji)大(da)修(xiu)(xiu)(xiu)等故障維(wei)修(xiu)(xiu)(xiu)。
　　2挖掘機維修(xiu)之冷卻系(xi)污物的(de)清除將15％的(de)氫氧(Oxygen)化鈉溶液(ye)注(zhu)入系(xi)統中，8～12h后運轉柴油機，待水溫上升到(dao)80～90℃時停車，立(li)即放出洗(xi)液(ye)，以防懸浮(fu)在溶液(ye)中的(de)水垢(Scale)沉淀堵塞水道，而后用清水清洗(xi)系(xi)統，直到(dao)洗(xi)凈為止(zhi)。
　　首先要(yao)(yao)測試發(fa)(fa)(fa)動(dong)(dong)機(ji)(ji)本(ben)身輸(shu)出(chu)功(gong)率（指(zhi)物體在(zai)單(dan)位時間(jian)內所做(zuo)的(de)(de)(de)功(gong)的(de)(de)(de)多少），挖掘(jue)（excavate)機(ji)(ji)修理如(ru)果發(fa)(fa)(fa)動(dong)(dong)機(ji)(ji)輸(shu)出(chu)功(gong)率大大低(di)于額定功(gong)率，如(ru)是(shi)(shi)在(zai)施工現場判斷要(yao)(yao)從最簡(jian)單(dan)的(de)(de)(de)方(fang)法入手(shou)，首先看燃油(you)(you)濾(lv)芯是(shi)(shi)否(fou)(fou)堵(du)塞，燃油(you)(you)路中是(shi)(shi)否(fou)(fou)有漏(lou)氣(qi)的(de)(de)(de)地方(fang)，燃油(you)(you)泵(Deep well pump)中的(de)(de)(de)柱塞，噴油(you)(you)頭，出(chu)油(you)(you)閥是(shi)(shi)否(fou)(fou)嚴(yan)重磨損，空(kong)氣(qi)濾(lv)芯進氣(qi)是(shi)(shi)否(fou)(fou)通暢，帶渦輪增壓(ya)器的(de)(de)(de)發(fa)(fa)(fa)動(dong)(dong)機(ji)(ji)，渦輪增壓(ya)器是(shi)(shi)否(fou)(fou)損壞，發(fa)(fa)(fa)動(dong)(dong)機(ji)(ji)是(shi)(shi)否(fou)(fou)快速高(gao)溫，機(ji)(ji)油(you)(you)粘(zhan)度下(xia)降(jiang)，造成缸(gang)壁封(feng)閉不嚴(yan)壓(ya)縮比下(xia)降(jiang)，是(shi)(shi)否(fou)(fou)缸(gang)套組件磨損造成缸(gang)內嚴(yan)重串氣(qi)，發(fa)(fa)(fa)動(dong)(dong)機(ji)(ji)氣(qi)門封(feng)閉不嚴(yan)等，這(zhe)些都是(shi)(shi)嚴(yan)重影響(xiang)(influence)發(fa)(fa)(fa)動(dong)(dong)機(ji)(ji)功(gong)率的(de)(de)(de)因素(su)，如(ru)果排除了(le)發(fa)(fa)(fa)動(dong)(dong)機(ji)(ji)本(ben)身輸(shu)出(chu)動(dong)(dong)力不足(zu)外，就要(yao)(yao)考慮（consider)液(ye)壓(ya)泵的(de)(de)(de)流量(liang)(單(dan)位:立方(fang)米每秒)和發(fa)(fa)(fa)動(dong)(dong)機(ji)(ji)的(de)(de)(de)輸(shu)出(chu)功(gong)率的(de)(de)(de)匹配(pei)問題(Emerson)了(le)。
　　液(ye)壓(ya)(ya)挖(wa)掘(jue)(jue)(jue)機(ji)(ji)(ji)在(zai)(zai)(zai)施工(gong)(gong)作業(ye)(ye)中，根據(ju)作業(ye)(ye)的(de)(de)負(fu)載要(yao)求(qiu)，速度與(yu)負(fu)載(流量與(yu)壓(ya)(ya)力)是(shi)成(cheng)挖(wa)掘(jue)(jue)(jue)機(ji)(ji)(ji)修理(li)(li)(li)廠反(fan)比(bi)的(de)(de)，就(jiu)是(shi)泵(beng)(beng)的(de)(de)輸(shu)出(chu)壓(ya)(ya)力和流量的(de)(de)乘積是(shi)一個(ge)常(chang)數(shu)，泵(beng)(beng)的(de)(de)輸(shu)出(chu)功(gong)(gong)率（指(zhi)物(wu)體(ti)(ti)在(zai)(zai)(zai)單位(wei)時間(jian)內所(suo)做的(de)(de)功(gong)(gong)的(de)(de)多少）恒定(ding)(ding)或近似恒定(ding)(ding)，如果(guo)泵(beng)(beng)控(kong)制系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)出(chu)現了故障，就(jiu)不(bu)能(neng)很好地實(shi)現發動(dong)機(ji)(ji)(ji)—泵(beng)(beng)—閥(fa)—負(fu)荷在(zai)(zai)(zai)不(bu)同(tong)工(gong)(gong)況區域(yu)優化匹配(pei)狀(zhuang)態，從而(er)使(shi)挖(wa)掘(jue)(jue)(jue)機(ji)(ji)(ji)不(bu)能(neng)正常(chang)作業(ye)(ye)，所(suo)以我(wo)們(men)必須掌握各種廠家生產(Produce)的(de)(de)挖(wa)機(ji)(ji)(ji)控(kong)制系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)，如大宇的(de)(de)EPOS系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)，加藤(teng)的(de)(de)APC系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)，CLSS系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)等，在(zai)(zai)(zai)處理(li)(li)(li)(chǔ lǐ)故障時，同(tong)樣是(shi)有簡到繁逐一分析確認(ren)，結合現代挖(wa)機(ji)(ji)(ji)是(shi)機(ji)(ji)(ji)—電—液(ye)一體(ti)(ti)化產品，技術包含比(bi)重高，所(suo)以在(zai)(zai)(zai)處理(li)(li)(li)故障時，一般先從電器系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)入手，再巡查液(ye)壓(ya)(ya)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)，最(zui)后(hou)檢(jian)(jian)查機(ji)(ji)(ji)械傳動(dong)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)，檢(jian)(jian)查液(ye)壓(ya)(ya)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)時，從輔助油(you)路(lu)—控(kong)制油(you)路(lu)—主油(you)路(lu)—控(kong)制元件逐步檢(jian)(jian)查。



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