前言:在現代散裝物料的連續輸送中,
帶式輸送機是主要的輸送設備,使用範圍相當廣泛,具有運輸成本低、運量大、無地形限製及維護簡便等優勢,在礦山、建材、化工、港口、電力、煤炭等工礦企業中越來越呈現出其重要的作用。尤其是現在各工礦企業為了提高生產效率、增zeng加jia經jing濟ji效xiao益yi,提ti高gao生sheng產chan設she備bei的de利li用yong率lv,大da運yun輸shu量liang的de帶dai式shi輸shu送song機ji及ji溜liu槽cao應ying用yong的de越yue來lai越yue多duo,這zhe樣yang就jiu對dui帶dai式shi輸shu送song機ji的de設she計ji提ti出chu更geng高gao的de要yao求qiu。下xia麵mian僅jin就jiu在zai撫fu順shun礦kuang業ye集ji團tuan頁ye岩yan煉lian油you廠chang工gong程cheng設she計ji中zhong總zong結jie出chu的de幾ji點dian經jing驗yan進jin行xing論lun述shu。
1、帶式輸送機
1.1物抖參數:zaidaishishusongjideshejiguochengzhong,youxuduodewuketezhengcanshuduizuizhongdeshejixiaoguoyouhendayingxiang。zaiguojiajixingyechubandegezhongshejileishukanzhongduiyoumuyeyandewuliaocanshumeiyoumingqueshuoming。genjumeitanjiganshidewuliaocanshuduibifenxi,jieheshijishejijingyandechudeyoumuyeyandewuliaocanshu,zaishejiguochengzhongxuanyong0-75mm粒度的物料散比重為1.46t/m,0~10mm粒度的散比重為1.11t/m.0-300mm粒度頁岩廢渣的散比重為1.17t/m,動堆集角為200在設計中運用上述參數設計出的帶式輸送機運行狀況良好。
1.2帶式輸送機機體設計
1.2.1具ju有you凹ao弧hu段duan的de帶dai式shi輸shu送song機ji。例li如ru同tong一yi條tiao帶dai式shi輸shu送song機ji先xian平ping行xing而er後hou爬pa升sheng,由you於yu大da運yun輸shu量liang的de原yuan因yin,在zai起qi弧hu點dian處chu的de膠jiao帶dai張zhang力li很hen大da,這zhe就jiu造zao成cheng了le凹ao弧hu段duan的de曲qu率lv半ban徑jing很hen大da,在zai水shui平ping方fang向xiang的de投tou影ying長chang度du很hen長chang,損sun失shi很hen大da的de水shui平ping空kong間jian。做zuo總zong平ping麵mian圖tu的de時shi候hou一yi定ding要yao考kao慮lv這zhe個ge因yin素su。做zuo施shi工gong圖tu是shi凹ao弧hu段duan無wu法fa選xuan擇ze標biao準zhun件jian,需xu進jin行xing非fei標biao準zhun設she計ji,否fou則ze就jiu容rong易yi造zao成cheng膠jiao帶dai脫tuo離li上shang托tuo輥gun,產chan生sheng膠jiao帶dai跑pao偏pian,影ying響xiang生sheng產chan。
1.2.2在施工圖設計過程中經常出現多點受料的情況。(如頁岩煉油廠幹餾爐下廢渣帶式輸送機)在zai這zhe種zhong情qing況kuang下xia由you於yu多duo點dian受shou料liao,導dao料liao槽cao的de數shu量liang很hen多duo,產chan生sheng的de附fu加jia阻zu力li很hen大da,如ru果guo按an照zhao普pu通tong情qing況kuang進jin行xing設she計ji,容rong易yi造zao成cheng傳chuan動dong滾gun筒tong空kong轉zhuan打da滑hua的de現xian象xiang。這zhe是shi因yin為wei承cheng載zai段duan附fu加jia阻zu力li的de大da量liang增zeng加jia導dao致zhiT1點膠帶張力大量增加,見圖10傳chuan動dong滾gun筒tong與yu膠jiao帶dai之zhi間jian的de摩mo擦ca力li小xiao於yu膠jiao帶dai所suo受shou到dao的de阻zu力li,即ji使shi傳chuan動dong係xi統tong提ti供gong驅qu動dong功gong率lv足zu夠gou大da也ye帶dai動dong不bu起qi帶dai式shi輸shu送song機ji運yun轉zhuan。解jie決jue這zhe個ge問wen題ti有you兩liang種zhong方fang法fa:一種方法是增大T3、T4點的初始張力。另一種方法是增大膠帶對傳動滾筒的圍包角。在膠帶的額定斷裂張力為遠遠大幹膠帶實際所受的最大張力(即”點張力)時,可以采用第一種方法。其作用原理是:增大T3、T4點的初始張力,則通過膠帶傳遞到T1、T2點dian的de膠jiao帶dai張zhang力li增zeng加jia,導dao致zhi傳chuan動dong滾gun筒tong處chu的de摩mo擦ca力li增zeng加jia,從cong而er帶dai動dong膠jiao帶dai運yun行xing。這zhe一yi種zhong方fang法fa簡jian便bian易yi行xing。當dang膠jiao帶dai的de額e定ding斷duan裂lie張zhang力li大da於yu膠jiao帶dai實shi際ji所suo受shou的de最zui大da張zhang力li不bu多duo的de情qing況kuang下xia,可ke以yi采cai用yong第di二er種zhong方fang法fa(見圖1)。通過非標準設計改變改向滾筒的位置,增大膠帶對傳動滾筒的圍包角度a,從而增加傳動滾筒與膠帶的摩擦麵積,增大摩擦力,帶動膠帶運行,這種方法增加了設計的工作量。
1.2.3多點連續卸料:
在工程中經常出現多點連續卸料的情況。(比如頁岩煉油廠幹餾爐上成品帶式輸送機)多點連續卸料一般選用犁式卸料器和卸料車。對於大運輸量的帶式輸送機,這兩種部件的選用也存在著一些需要考慮的問題。
①犁式卸料器的選用:由you於yu是shi大da運yun輸shu量liang,平ping行xing上shang托tuo輥gun帶dai式shi輸shu送song機ji很hen難nan達da到dao額e定ding運yun輸shu量liang,必bi須xu選xuan用yong帶dai槽cao角jiao的de上shang托tuo輥gun。這zhe樣yang普pu通tong犁li式shi卸xie料liao器qi就jiu無wu法fa應ying用yong,可ke以yi選xuan用yong可ke變bian槽cao角jiao犁li式shi卸xie料liao器qi。當dang不bu需xu要yao卸xie料liao時shi,卸xie料liao器qi下xia麵mian托tuo輥gun為wei槽cao型xing托tuo輥gun,保bao證zheng物wu料liao正zheng常chang通tong過guo。要yao求qiu卸xie料liao時shi推tui杆gan帶dai動dong機ji械xie機ji構gou將jiang槽cao型xing托tuo輥gun的de角jiao度du段duan放fang平ping,同tong時shi卸xie料liao器qi落luo下xia開kai始shi卸xie料liao。需xu要yao注zhu意yi的de是shi不bu要yao選xuan用yong壓ya平ping式shi可ke變bian槽cao角jiao犁li式shi卸xie科ke器qi,而er應ying選xuan用yong機ji械xie機ji構gou放fang平ping式shi可ke變bian槽cao角jiao犁li式shi卸xie料liao器qi,否fou則ze,將jiang增zeng大da傳chuan動dong功gong率lv,造zao成cheng資zi源yuan浪lang費fei。
②卸料車的選用:xuanyongxieliaocheyaozhuyilianggewenti。qiyi,youyushidayunshuliangyunxing,xieliaocheshangdexieliaoliucaodeliutongjiemiankenengcunzaipingjingwenti,yaojinxingliuliangjisuan,biyaoshiyaojiadaliucaodeliutongjiemianji。qier,xieliaochedecheweibujiangjiaodaitiaoqi。ruguoxieliaocheweibujulidaoliaocaoguojin,shijiaodaiyudaoliaocaomocajiaju,budanzengdadaishishusongjifujiazuli,erqiedaozhijiaodaidemosunjiaju,yingxiangjiaodaideshiyongshouming。genjuyiwangdeshejijingyan,yingbaozhengxieliaocheweibujulidiyigedaoliaocao15m以上。
2、帶式輸送機傳動係統的設計
普通情況下帶式輸送機的傳動係統可以根據計算的所需功率,膠帶帶速、帶寬及傳動滾筒的直徑等特征參數在DTS、TD75、DT¨型(xing)帶(dai)式(shi)輸(shu)送(song)機(ji)的(de)傳(chuan)動(dong)裝(zhuang)置(zhi)的(de)配(pei)置(zhi)表(biao)中(zhong)選(xuan)用(yong)標(biao)準(zhun)配(pei)置(zhi)。但(dan)是(shi),大(da)運(yun)輸(shu)量(liang)情(qing)況(kuang)下(xia),所(suo)需(xu)要(yao)的(de)傳(chuan)動(dong)功(gong)率(lv)往(wang)往(wang)很(hen)大(da),很(hen)難(nan)在(zai)標(biao)準(zhun)配(pei)置(zhi)表(biao)中(zhong)選(xuan)到(dao)合(he)適(shi)的(de)傳(chuan)動(dong)裝(zhuang)置(zhi)。這(zhe)就(jiu)要(yao)求(qiu)設(she)計(ji)工(gong)程(cheng)師(shi)根(gen)據(ju)實(shi)際(ji)情(qing)況(kuang)搭(da)配(pei)非(fei)標(biao)準(zhun)的(de)傳(chuan)動(dong)係(xi)統(tong),進(jin)行(xing)非(fei)標(biao)準(zhun)設(she)計(ji)。設(she)計(ji)工(gong)程(cheng)師(shi)在(zai)選(xuan)用(yong)傳(chuan)動(dong)裝(zhuang)置(zhi)部(bu)件(jian)時(shi)要(yao)注(zhu)意(yi)各(ge)部(bu)件(jian)之(zhi)間(jian)的(de)匹(pi)配(pei)問(wen)題(ti),盡(jin)量(liang)做(zuo)到(dao)國(guo)內(nei)生(sheng)產(chan)的(de)標(biao)準(zhun)部(bu)件(jian)之(zhi)間(jian)搭(da)配(pei)。國(guo)外(wai)生(sheng)產(chan)的(de)部(bu)件(jian)搭(da)配(pei)國(guo)外(wai)生(sheng)產(chan)的(de)部(bu)件(jian),否(fou)則(ze),容(rong)易(yi)出(chu)現(xian)很(hen)多(duo)問(wen)題(ti)。例(li)如(ru):yongguoneishengchandediandongjidapeiguowaishengchanjiansuqi,diandongjideshuchuzhouzhoujingyuanyuandaganguowaijiansuqideshuruzhouzhoujing,zhejiuweixuanzegunliouheqidailainanti。ruoxuanyongguowaideyeliouheqi,zeyeliouheqidediandongjilianjieduanwufayudiandongjilianjie(軸粗)。若ruo選xuan用yong國guo內nei的de液ye力li耦ou合he器qi,則ze國guo內nei的de液ye力li耦ou合he器qi重zhong量liang和he體ti積ji很hen大da,在zai與yu國guo外wai減jian速su器qi連lian接jie運yun行xing時shi,由you於yu國guo外wai減jian速su器qi軸zhou徑jing很hen小xiao,容rong易yi產chan生sheng振zhen動dong,嚴yan重zhong時shi會hui產chan生sheng減jian速su器qi斷duan軸zhou的de情qing況kuang。
3、帶式輸送機的爬升角度
帶dai式shi輸shu送song機ji的de極ji限xian爬pa升sheng角jiao度du與yu許xu多duo因yin素su有you關guan。其qi中zhong最zui重zhong要yao的de是shi物wu科ke粒li度du及ji物wu料liao含han水shui率lv。物wu料liao的de粒li度du與yu帶dai式shi輸shu送song機ji的de極ji限xian角jiao度du成cheng反fan比bi關guan係xi。物wu料liao的de粒li度du越yue大da,帶dai式shi輸shu送song機ji的de極ji限xian爬pa升sheng角jiao度du越yue小xiao,反fan之zhi物wu料liao的de粒li度du越yue小xiao,帶dai式shi輸shu送song機ji的de極ji限xian爬pa升sheng角jiao度du越yue大da。運yun送song油you母mu頁ye岩yan成cheng品pin礦kuang(粒度0-75mm)的帶式輸送機的最大爬升角度為16,而尾礦(粒度0~10mm)帶式輸送機的最大爬升角度可以達到18。另外,物料的含水率越高,其帶式輸送機的最大爬升角度就越小。
綜(zong)上(shang)所(suo)述(shu),大(da)運(yun)輸(shu)量(liang)帶(dai)式(shi)輸(shu)送(song)機(ji)是(shi)在(zai)普(pu)通(tong)帶(dai)式(shi)輸(shu)送(song)機(ji)設(she)計(ji)原(yuan)理(li)基(ji)礎(chu)上(shang),結(jie)合(he)大(da)運(yun)輸(shu)量(liang)這(zhe)個(ge)特(te)點(dian)設(she)計(ji)而(er)成(cheng)。在(zai)設(she)計(ji)過(guo)程(cheng)中(zhong)要(yao)時(shi)刻(ke)注(zhu)意(yi)運(yun)輸(shu)量(liang)大(da)的(de)特(te)性(xing),要(yao)從(cong)這(zhe)個(ge)方(fang)麵(mian)考(kao)慮(lv)問(wen)題(ti)。
4、結論
隨sui著zhe我wo國guo深shen化hua改gai革ge的de不bu斷duan深shen入ru,市shi場chang經jing濟ji的de地di位wei越yue來lai越yue高gao,各ge工gong礦kuang企qi業ye的de經jing濟ji意yi識shi越yue加jia強qiang烈lie,對dui工gong程cheng的de要yao求qiu也ye就jiu越yue來lai越yue高gao,這zhe就jiu要yao求qiu工gong程cheng設she計ji人ren員yuan素su質zhi不bu斷duan提ti高gao,在zai原yuan有you知zhi識shi的de基ji礎chu上shang不bu斷duan地di學xue習xi探tan索suo,才cai能neng在zai激ji烈lie的de市shi場chang競jing爭zheng中zhong立li於yu不bu敗bai之zhi地di。
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