橋式抓鬥卸船機通常是滿載工作的,但岸邊集裝箱起重機起升機構的載荷變化很大。由於目前集裝箱的載貨量一般隻有額定載貨量的50%~60%,如起重機的額定起重量按30.5t設計,起吊20ft集裝箱時,即使按總重量也隻達到起重機額定起重量的67%。為(wei)了(le)提(ti)高(gao)裝(zhuang)卸(xie)效(xiao)率(lv),要(yao)求(qiu)起(qi)升(sheng)速(su)度(du)隨(sui)載(zai)荷(he)的(de)大(da)小(xiao)而(er)變(bian)化(hua),如(ru)起(qi)吊(diao)額(e)定(ding)載(zai)荷(he)的(de)速(su)度(du)為(wei)一(yi)定(ding),則(ze)要(yao)求(qiu)起(qi)吊(diao)的(de)載(zai)荷(he)小(xiao)於(yu)額(e)定(ding)載(zai)荷(he)時(shi),起(qi)升(sheng)速(su)度(du)應(ying)成(cheng)反(fan)比(bi)例(li)增(zeng)加(jia),一(yi)般(ban)空(kong)載(zai)速(su)度(du)為(wei)重(zhong)載(zai)速(su)度(du)的(de)2倍甚至2.5倍。
2.小車運行和減搖機構
集ji裝zhuang箱xiang起qi重zhong機ji的de小xiao車che運yun行xing距ju離li較jiao長chang,運yun行xing速su度du也ye較jiao高gao,當dang小xiao車che啟qi動dong和he製zhi動dong時shi,貨huo物wu會hui在zai小xiao車che運yun行xing方fang向xiang上shang搖yao擺bai。小xiao車che運yun行xing速su度du越yue高gao,搖yao擺bai越yue嚴yan重zhong,從cong而er影ying響xiang裝zhuang卸xie效xiao率lv和he作zuo業ye安an全quan。因yin此ci,必bi須xu裝zhuang設she減jian搖yao裝zhuang置zhi。
3.大車運行機構
在zai裝zhuang卸xie集ji裝zhuang箱xiang船chuan時shi,由you於yu需xu要yao經jing常chang移yi動dong大da車che對dui正zheng船chuan上shang的de箱xiang位wei,並bing不bu致zhi碰peng撞zhuang鄰lin近jin的de集ji裝zhuang箱xiang或huo船chuan舶bo的de上shang層ceng建jian築zhu,因yin而er要yao求qiu大da車che運yun行xing機ji構gou具ju有you較jiao好hao的de調tiao速su、微動和製動性能,所以通常采用直流電動機驅動。
4.驅動和供電方式
為(wei)滿(man)足(zu)岸(an)邊(bian)集(ji)裝(zhuang)箱(xiang)起(qi)重(zhong)機(ji)的(de)工(gong)作(zuo)要(yao)求(qiu),取(qu)得(de)良(liang)好(hao)的(de)調(tiao)速(su)性(xing)能(neng),一(yi)般(ban)采(cai)用(yong)直(zhi)流(liu)無(wu)級(ji)調(tiao)速(su)係(xi)統(tong),各(ge)機(ji)構(gou)采(cai)用(yong)直(zhi)流(liu)電(dian)動(dong)機(ji)驅(qu)動(dong)。直(zhi)流(liu)電(dian)源(yuan)的(de)供(gong)電(dian)方(fang)式(shi)有(you)三(san)種(zhong):yizhongshijiaoliudiandongjiyizhiliufadianjifangshi,zhezhongfangshiyongdejiaoduo,tagongzuobijiaokekao,gongdiandianyajibenshangbushoudianwangdianyabodongdeyingxiang,bijiaowending。quedianshijizuzizhongda,jiagegao,zaoshengyejiaoda。yizhongshikekongguizhengliufangshi,tadedianxiaolvgao,tiaosuxingnenghao,jizuzhongliangqing,zhandimianjixiao,weixiufangbian,danyaoqiudianwangrongliangjiaoda,dianyabodongxiao。ciwai,duiweixiudejishushuipingyaoqiugao。sanzhongshichaiyoujiyizhiliufadianjidegongdianfangshi,tabushouwaijiedianyuandeyingxiang,tigaolejizhuangxiangqizhongjidejidongxing,tebieshiyongyugongdianbufangbiandematou,bingkejieshenggongdiansheshidetouzi,danzhezhongjizuzaoshenghenda,chaiyoujideweixiuyejiaofuza。
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