2018
-
11
-
28
點擊次數:
877
一(yi)(yi)、前言 門(men)(men)(men)式(shi)起重(zhong)機(ji)是(shi)通(tong)過橋架(jia)(jia)兩(liang)側支(zhi)腿支(zhi)撐在地面(mian)軌道(dao)上運行(xing)(xing)的(de)(de)橋架(jia)(jia)型起重(zhong)機(ji)，又稱龍門(men)(men)(men)吊(diao)，是(shi)一(yi)(yi)種將吊(diao)鉤(gou)(gou)或其它取物(wu)裝置(zhi)上的(de)(de)重(zhong)物(wu)通(tong)過垂直升(sheng)(sheng)降(jiang)和(he)(he)(he)水(shui)平(ping)移動(dong)(dong)來(lai)實現(xian)物(wu)料轉(zhuan)(zhuan)移的(de)(de)重(zhong)載起重(zhong)設(she)備(bei)。門(men)(men)(men)式(shi)起重(zhong)機(ji)具有場(chang)地利用(yong)(yong)(yong)(yong)率高(gao)(gao)、作業范圍大(da)、適應(ying)面(mian)廣、通(tong)用(yong)(yong)(yong)(yong)性(xing)強等(deng)特(te)點;廣泛應(ying)用(yong)(yong)(yong)(yong)于建筑(zhu)工程及橋梁施工、電(dian)力、船舶(bo)、汽車制(zhi)(zhi)造、冶(ye)金、礦山(shan)、建筑(zhu)、橋梁等(deng)基(ji)礎設(she)施的(de)(de)建設(she)。 二(er)、變(bian)頻(pin)器(qi)(qi)控(kong)制(zhi)(zhi)應(ying)用(yong)(yong)(yong)(yong)方案 門(men)(men)(men)式(shi)起重(zhong)機(ji)主要由主吊(diao)鉤(gou)(gou)、副鉤(gou)(gou)、大(da)車行(xing)(xing)走機(ji)構(gou)、小車行(xing)(xing)走機(ji)構(gou)和(he)(he)(he)電(dian)氣(qi)(qi)控(kong)制(zhi)(zhi)系(xi)統構(gou)成;動(dong)(dong)力驅動(dong)(dong)機(ji)構(gou)均采用(yong)(yong)(yong)(yong)變(bian)頻(pin)無級調速(su)控(kong)制(zhi)(zhi)，改善(shan)其啟動(dong)(dong)和(he)(he)(he)停止時的(de)(de)沖(chong)擊，提(ti)高(gao)(gao)運行(xing)(xing)平(ping)穩性(xing)和(he)(he)(he)定位的(de)(de)準確性(xing)。 1、提(ti)升(sheng)(sheng)機(ji)構(gou)：采用(yong)(yong)(yong)(yong)新科瑞C500系(xi)列起重(zhong)專用(yong)(yong)(yong)(yong)變(bian)頻(pin)器(qi)(qi)進行(xing)(xing)控(kong)制(zhi)(zhi)，選擇(ze)無PG開環矢量(liang)控(kong)制(zhi)(zhi)模式(shi)控(kong)制(zhi)(zhi)單臺(tai)或多臺(tai)電(dian)機(ji)實現(xian)提(ti)升(sheng)(sheng)機(ji)的(de)(de)上升(sheng)(sheng)和(he)(he)(he)下降(jiang)，用(yong)(yong)(yong)(yong)多段數實現(xian)高(gao)(gao)、低速(su)的(de)(de)轉(zhuan)(zhuan)換。 2、大(da)、小車行(xing)(xing)走機(ji)構(gou)：采用(yong)(yong)(yong)(yong)新科瑞起重(zhong)專用(yong)(yong)(yong)(yong)變(bian)頻(pin)器(qi)(qi)同時控(kong)制(zhi)(zhi)2臺(tai)或多臺(tai)電(dian)機(ji)實現(xian)正反轉(zhuan)(zhuan)和(he)(he)(he)高(gao)(gao)、低速(su)轉(zhuan)(zhuan)換。 三、結(jie)束(shu)語 門(men)(men)(men)式(shi)起重(zhong)機(ji)經(jing)(jing)電(dian)氣(qi)(qi)改造后經(jing)(jing)6個月(yue)的(de)(de)運行(xing)(xing)檢(jian)測節能27%;起動(dong)(dong)平(ping)滑,機(ji)械沖(chong)擊小;定位準確。全國(guo)約(yue)800臺(tai)門(men)(men)(men)式(shi)起重(zhong)機(ji)中500臺(tai)左右有變(bian)頻(pin)改造的(de)(de)可能。這種改造尚有進一(yi)(yi)步性(xing)能提(ti)升(sheng)(sheng)的(de)(de)可能:如加裝一(yi)(yi)臺(tai)變(bian)頻(pin)器(qi)(qi)拖動(dong)(dong)副鉤(gou)(gou);加裝編碼器(qi)(qi)作死循環控(kong)制(zhi)(zhi);配置(zhi)觸摸屏(ping)監控(kong)運行(xing)(xing)狀態(tai)。