於材料、工藝、零(ling)件(jian)老(lao)化(hua)和(he)人(ren)為(wei)因(yin)素(su)等(deng)的(de)影(ying)響(xiang),工(gong)程(cheng)機(ji)械(xie)在(zai)使(shi)用(yong)中(zhong)不(bu)可(ke)避(bi)免(mian)地(di)會(hui)出(chu)現(xian)各(ge)種(zhong)各(ge)樣(yang)的(de)故(gu)障(zhang)。但(dan)是(shi),如(ru)果(guo)能(neng)夠(gou)正(zheng)確(que)地(di)分(fen)析(xi)各(ge)種(zhong)故(gu)障(zhang)原(yuan)因(yin),采(cai)取(qu)有(you)效(xiao)的(de)、針對性強的防範措施,盡量減慢機械零部件的損傷速度,是可以有效地防止機械故障,延長機械使用壽命的。
1、盡量減少有害因素的影響
(1)減少機械雜質的影響
機械雜質一般指的是灰塵、土壤等非金屬物質和工程機械在使用過程中自身產生的一些金屬屑、磨mo損sun產chan物wu等deng。這zhe些xie雜za質zhi一yi旦dan進jin入ru機ji械xie內nei部bu,到dao達da機ji械xie的de配pei合he表biao麵mian之zhi間jian,其qi危wei害hai是shi很hen大da的de,不bu但dan使shi相xiang對dui運yun動dong出chu來lai阻zu滯zhi,加jia速su零ling件jian的de磨mo損sun,而er且qie會hui擦ca傷shang配pei合he表biao麵mian,破po壞huai潤run滑hua油you膜mo,使shi零ling件jian溫wen度du升sheng高gao、潤滑油變質。據測定,潤滑中機械雜質增加到0.15%時,發動機第一道活塞環的磨損速度將比正常值大2.5倍;滾動軸隨進入雜質微粒時,其壽命將降低80%-90%。因此,對於工作在環境惡劣、條件複雜場所的工程機械來說,一要使用優質、配套的零部件及潤滑油、潤滑脂,堵住有害雜質的源頭;二er要yao做zuo好hao工gong作zuo現xian場chang的de機ji械xie防fang護hu工gong作zuo,保bao證zheng相xiang應ying機ji構gou能neng正zheng常chang工gong作zuo,防fang止zhi各ge種zhong雜za質zhi進jin入ru機ji械xie內nei部bu。對dui出chu現xian故gu障zhang的de機ji械xie,盡jin量liang到dao正zheng規gui的de修xiu理li場chang所suo進jin行xing修xiu理li。現xian場chang修xiu理li時shi,也ye要yao做zuo好hao防fang護hu措cuo施shi,防fang止zhi現xian場chang修xiu理li時shi更geng換huan的de零ling部bu件jian在zai進jin入ru機ji械xie前qian受shou到dao灰hui塵chen等deng雜za質zhi的de汙wu染ran。
(2)減少溫度的影響
在工作中,各個零部件的溫度都有各自的正常範圍。如一般冷卻水的溫度為80-90℃,液壓傳動係統液壓油的溫度為30-60℃,低於或超過此範圍就會加速零件的磨損,引起潤滑油變質,造成材料性能變化等等。試驗表明,各種工程機械的主傳動齒輪和軸承在-5℃的潤滑油中運轉比在3℃的潤滑油中運轉,磨損要增大10-12倍。但當溫度過高時,又會加速潤滑油的變質,如機油溫度超過55-60℃時,油溫每升高5℃,jiyoudeyanghuasudujiangtigaoyibei。weici,gongchengjixiezaishiyongguochengzhong,yiyaofangzhidiwenxiajinxingchaofuheyunzhuan,baozhengdisuyuwenjieduandezhengchangyunxing,shijixiedadaoguidingwenduhouzaijinxingxingshihuogongzuo,buyaoyinweidangshibuchuxianwentierhushiqizhongyaozuoyong;二er要yao防fang止zhi機ji械xie在zai高gao溫wen下xia運yun轉zhuan,機ji械xie運yun行xing過guo程cheng中zhong要yao經jing常chang檢jian查zha各ge種zhong溫wen度du表biao上shang的de數shu值zhi,發fa現xian問wen題ti立li即ji停ting機ji進jin行xing檢jian查zha,發fa現xian故gu障zhang及ji時shi排pai除chu。對dui於yu一yi時shi找zhao不bu到dao原yuan因yin的de,絕jue不bu能neng不bu經jing處chu理li而er仍reng使shi機ji械xie帶dai病bing工gong作zuo。在zai平ping時shi的de工gong作zuo中zhong,要yao注zhu意yi檢jian查zha冷leng卻que係xi統tong的de工gong作zuo狀zhuang況kuang。對dui水shui冷leng式shi機ji械xie,每mei日ri工gong作zuo前qian必bi須xu檢jian查zha,加jia添tian冷leng卻que水shui;對風冷式機械,也要定期清理風冷係統上的灰塵,保證散熱風道暢通。
(3)減少各種腐蝕作用
金(jin)屬(shu)表(biao)麵(mian)與(yu)周(zhou)圍(wei)介(jie)質(zhi)發(fa)生(sheng)化(hua)學(xue)或(huo)電(dian)化(hua)學(xue)作(zuo)用(yong)而(er)遭(zao)受(shou)破(po)壞(huai)的(de)現(xian)象(xiang)稱(cheng)腐(fu)蝕(shi)。這(zhe)種(zhong)腐(fu)蝕(shi)作(zuo)用(yong)不(bu)但(dan)會(hui)影(ying)響(xiang)機(ji)械(xie)外(wai)表(biao)設(she)備(bei)的(de)正(zheng)常(chang)工(gong)作(zuo),而(er)且(qie)會(hui)腐(fu)蝕(shi)到(dao)機(ji)械(xie)內(nei)部(bu)的(de)零(ling)部(bu)件(jian)。如(ru)雨(yu)水(shui)、空氣中的化學物質等通過機械零部件的對外通道、縫隙等進入機械內部,腐蝕機械零件內部,加速機械磨損,增加機械故障。由於這種腐蝕作用有時是看不見、摸不著的,容易衩人忽視,因而其危害性更大。在使用中,管理和操作人員要根據當時當地天氣情況、空氣汙染情況,采取有效的措施,減小化學腐蝕對機械的影響,重點是防止雨水及空氣中化學成分對機械的侵入。
2、保證正常的工作載荷
工(gong)程(cheng)機(ji)械(xie)工(gong)作(zuo)載(zai)荷(he)的(de)大(da)小(xiao)和(he)性(xing)質(zhi)對(dui)機(ji)械(xie)的(de)損(sun)耗(hao)過(guo)程(cheng)有(you)著(zhe)重(zhong)要(yao)的(de)影(ying)響(xiang)。一(yi)般(ban)來(lai)說(shuo),零(ling)件(jian)的(de)磨(mo)損(sun)隨(sui)負(fu)荷(he)的(de)增(zeng)加(jia)而(er)成(cheng)比(bi)例(li)地(di)增(zeng)加(jia)。當(dang)零(ling)件(jian)承(cheng)受(shou)的(de)載(zai)荷(he)高(gao)於(yu)平(ping)均(jun)設(she)計(ji)載(zai)荷(he)時(shi),其(qi)磨(mo)損(sun)將(jiang)會(hui)加(jia)劇(ju)。另(ling)外(wai),在(zai)其(qi)他(ta)條(tiao)件(jian)相(xiang)同(tong)時(shi),穩(wen)定(ding)的(de)載(zai)荷(he)比(bi)動(dong)載(zai)荷(he)下(xia)磨(mo)損(sun)要(yao)小(xiao),故(gu)障(zhang)少(shao),壽(shou)命(ming)低(di)。試(shi)驗(yan)表(biao)明(ming),發(fa)動(dong)機(ji)在(zai)不(bu)穩(wen)定(ding)載(zai)荷(he)下(xia)工(gong)作(zuo)與(yu)穩(wen)定(ding)載(zai)荷(he)下(xia)工(gong)作(zuo)比(bi)較(jiao),其(qi)氣(qi)缸(gang)的(de)磨(mo)損(sun)將(jiang)增(zeng)大(da)2倍(bei)。在(zai)正(zheng)常(chang)負(fu)荷(he)下(xia)工(gong)作(zuo)的(de)發(fa)動(dong)機(ji),其(qi)故(gu)障(zhang)發(fa)生(sheng)率(lv)較(jiao)低(di),且(qie)壽(shou)命(ming)延(yan)長(chang)。相(xiang)反(fan),超(chao)負(fu)荷(he)運(yun)轉(zhuan)的(de)發(fa)動(dong)機(ji),故(gu)障(zhang)發(fa)生(sheng)率(lv)明(ming)顯(xian)增(zeng)多(duo),壽(shou)命(ming)也(ye)會(hui)比(bi)設(she)計(ji)指(zhi)標(biao)減(jian)少(shao)。經(jing)常(chang)處(chu)於(yu)大(da)範(fan)圍(wei)負(fu)荷(he)變(bian)動(dong)的(de)機(ji)械(xie)磨(mo)損(sun)量(liang)大(da)於(yu)連(lian)續(xu)穩(wen)定(ding)工(gong)作(zuo)的(de)機(ji)械(xie)。一(yi)般(ban)情(qing)況(kuang)下(xia),發(fa)電(dian)機(ji)使(shi)用(yong)的(de)發(fa)動(dong)機(ji)要(yao)比(bi)推(tui)土(tu)機(ji)、挖掘機等使用的發動機壽命要長。
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3、保證對機械的合理潤滑
零件工作麵的磨員、零件表麵的腐蝕和材料的老化是正常使用條件下的機械零部件的3種(zhong)主(zhu)要(yao)換(huan)效(xiao)形(xing)式(shi),而(er)零(ling)件(jian)工(gong)作(zuo)麵(mian)的(de)磨(mo)損(sun)所(suo)引(yin)起(qi)的(de)失(shi)效(xiao)所(suo)占(zhan)的(de)比(bi)例(li)最(zui)大(da)。也(ye)就(jiu)是(shi)說(shuo),機(ji)械(xie)的(de)磨(mo)損(sun)是(shi)使(shi)其(qi)各(ge)種(zhong)零(ling)部(bu)件(jian)走(zou)向(xiang)極(ji)限(xian)技(ji)術(shu)狀(zhuang)態(tai)的(de)主(zhu)要(yao)原(yuan)因(yin)之(zhi)一(yi)。那(na)麼(me),解(jie)決(jue)機(ji)械(xie)零(ling)部(bu)件(jian)的(de)磨(mo)損(sun)問(wen)題(ti)。除(chu)了(le)采(cai)用(yong)優(you)良(liang)的(de)材(cai)料(liao)、選擇先進的製造工藝、設she計ji合he理li的de機ji械xie結jie構gou外wai,在zai使shi用yong過guo程cheng中zhong要yao做zuo的de一yi項xiang重zhong要yao工gong作zuo就jiu是shi保bao證zheng對dui機ji械xie的de合he理li潤run滑hua。據ju統tong計ji,工gong程cheng機ji械xie的de故gu障zhang有you一yi半ban以yi上shang是shi由you潤run滑hua不bu良liang引yin起qi的de。由you於yu工gong程cheng機ji械xie各ge零ling部bu件jian配pei合he的de精jing密mi性xing,良liang好hao的de潤run滑hua可ke以yi使shi其qi保bao持chi正zheng常chang的de工gong作zuo間jian隙xi和he合he適shi的de工gong作zuo溫wen度du,從cong而er降jiang低di零ling件jian的de磨mo損sun程cheng度du,減jian少shao機ji械xie故gu障zhang。正zheng常chang合he理li的de潤run滑hua是shi減jian少shao機ji械xie故gu障zhang的de有you效xiao措cuo施shi之zhi一yi。為wei此ci,一yi是shi要yao合he理li選xuan用yong潤run滑hua劑ji,要yao根gen據ju機ji械xie的de種zhong類lei和he應ying用yong結jie構gou的de不bu同tong選xuan用yong正zheng常chang的de潤run滑hua劑ji類lei別bie,根gen據ju機ji械xie的de要yao求qiu選xuan用yong合he適shi的de質zhi量liang等deng組zu,根gen據ju機ji械xie的de要yao求qiu選xuan用yong合he適shi的de質zhi量liang等deng級ji,根gen據ju機ji械xie的de工gong作zuo環huan境jing和he不bu同tong的de季ji節jie選xuan擇ze合he適shi的de潤run滑hua劑ji牌pai號hao。使shi用yong中zhong,既ji不bu可ke使shi用yong低di等deng級ji的de潤run滑hua劑ji,也ye不bu可ke用yong其qi他ta種zhong類lei的de潤run滑hua劑ji代dai替ti,更geng不bu可ke使shi用yong劣lie質zhi產chan品pin。二er是shi要yao經jing常chang檢jian查zha潤run滑hua劑ji的de數shu量liang和he質zhi量liang。數shu量liang不bu足zu要yao及ji時shi補bu充chong,質zhi量liang不bu佳jia要yao及ji時shi更geng換huan。應ying急ji條tiao件jian下xia使shi用yong不bu同tong種zhong類lei及ji牌pai號hao潤run滑hua劑ji代dai用yong者zhe,事shi後hou一yi定ding對dui潤run滑hua係xi統tong進jin行xing清qing洗xi並bing及ji時shi地di更geng換huan正zheng常chang的de潤run滑hua劑ji。
4、適時維修
機ji械xie在zai使shi用yong過guo程cheng中zhong必bi然ran會hui出chu現xian各ge種zhong各ge樣yang的de故gu障zhang。在zai這zhe些xie故gu障zhang中zhong,有you些xie故gu障zhang對dui機ji械xie設she備bei的de影ying響xiang可ke能neng是shi很hen微wei小xiao的de,有you些xie是shi比bi較jiao嚴yan重zhong的de,甚shen至zhi會hui造zao成cheng機ji毀hui人ren亡wang的de大da事shi故gu。經jing驗yan表biao明ming,嚴yan重zhong機ji械xie故gu障zhang往wang往wang是shi由you一yi些xie較jiao小xiao的de故gu障zhang引yin發fa的de。究jiu其qi原yuan因yin,就jiu在zai於yu忽hu視shi了le對dui小xiao故gu障zhang的de及ji時shi處chu置zhi。因yin此ci,對dui於yu機ji械xie故gu障zhang,無wu論lun大da小xiao都dou應ying及ji時shi地di進jin行xing排pai除chu,這zhe樣yang才cai能neng保bao持chi機ji械xie的de正zheng常chang性xing能neng,減jian少shao引yin發fa更geng大da故gu障zhang的de可ke能neng性xing。從cong某mou種zhong意yi義yi上shang來lai說shuo,對dui出chu現xian的de故gu障zhang及ji時shi進jin行xing處chu理li,就jiu是shi減jian少shao和he防fang止zhi故gu障zhang的de一yi種zhong有you效xiao措cuo施shi。所suo謂wei適shi時shi進jin行xing處chu理li一yi是shi要yao按an照zhao維wei修xiu保bao養yang規gui程cheng,對dui機ji械xie進jin行xing定ding期qi的de保bao養yang與yu修xiu理li,各ge種zhong等deng組zu的de保bao養yang與yu修xiu理li必bi須xu按an要yao求qiu進jin行xing。現xian有you的de各ge種zhong保bao養yang與yu修xiu理li規gui格ge是shi多duo年nian實shi踐jian經jing驗yan的de總zong結jie,是shi有you其qi科ke學xue性xing與yu合he理li性xing的de,在zai沒mei有you重zhong大da的de技ji術shu進jin步bu與yu革ge新xin的de情qing況kuang下xia,這zhe些xie規gui程cheng對dui工gong程cheng機ji械xie維wei修xiu與yu保bao養yang的de指zhi導dao是shi絕jue對dui性xing的de,必bi須xu遵zun照zhao執zhi行xing。二er是shi在zai使shi用yong過guo程cheng中zhong要yao加jia強qiang對dui工gong程cheng機ji械xie的de定ding期qi與yu不bu定ding期qi檢jian查zha,及ji時shi了le解jie機ji械xie的de運yun行xing情qing況kuang,對dui臨lin時shi出chu現xian的de故gu障zhang,要yao及ji時shi進jin行xing處chu理li,不bu要yao因yin故gu障zhang小xiao、不影響使用而延誤維修時機,釀成更大故障。
5、采取正確的技術措施和組織管理措施
隨著材料科學及設計製造技術的發展,工程機械上采用了許多新技術、新材料、新結構,要求機械的技術保障與管理工作更科學、更完善。為此作為工程機械的組織管理人員及操作人員,一要注意保證機械在運輸及保管過程中防止機械的損傷、變形、腐(fu)蝕(shi)等(deng)。二(er)要(yao)嚴(yan)格(ge)機(ji)械(xie)的(de)日(ri)常(chang)維(wei)護(hu)工(gong)作(zuo),使(shi)機(ji)械(xie)處(chu)於(yu)良(liang)好(hao)的(de)技(ji)術(shu)狀(zhuang)態(tai)。三(san)是(shi)要(yao)教(jiao)育(yu)操(cao)作(zuo)人(ren)員(yuan)正(zheng)確(que)的(de)使(shi)用(yong)和(he)操(cao)作(zuo)各(ge)種(zhong)工(gong)程(cheng)機(ji)械(xie),減(jian)少(shao)和(he)防(fang)止(zhi)人(ren)為(wei)失(shi)誤(wu)引(yin)起(qi)的(de)機(ji)械(xie)故(gu)障(zhang)。四(si)要(yao)精(jing)心(xin)保(bao)養(yang)機(ji)械(xie),要(yao)做(zuo)到(dao)正(zheng)確(que)合(he)理(li)地(di)進(jin)行(xing)定(ding)期(qi)與(yu)不(bu)定(ding)期(qi)保(bao)養(yang),保(bao)持(chi)機(ji)械(xie)的(de)清(qing)潔(jie)、幹淨,定期檢查機械的技術狀態,發現異常及時處理,對於鬆動和失調的零部件及時緊固和調整,對一些易損件進行預防性的更換等。
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