起重機的檢測檢驗方法

      機(ji)構(gou)電(dian)動(dong)機(ji)采(cai)用(yong)凸(tu)輪(lun)控(kong)製(zhi)器(qi)直(zhi)接(jie)控(kong)製(zhi)的(de)，一(yi)般(ban)把(ba)各(ge)機(ji)構(gou)凸(tu)輪(lun)控(kong)製(zhi)器(qi)的(de)零(ling)位(wei)觸(chu)頭(tou)全(quan)部(bu)串(chuan)入(ru)總(zong)電(dian)源(yuan)接(jie)觸(chu)器(qi)的(de)啟(qi)動(dong)控(kong)製(zhi)回(hui)路(lu)中(zhong)，實(shi)現(xian)零(ling)位(wei)保(bao)護(hu)。各(ge)機(ji)構(gou)凸(tu)輪(lun)控(kong)製(zhi)器(qi)有(you)一(yi)個(ge)不(bu)在(zai)零(ling)位(wei)
，這(zhe)個(ge)凸(tu)輪(lun)控(kong)製(zhi)器(qi)的(de)零(ling)位(wei)觸(chu)頭(tou)是(shi)斷(duan)開(kai)的(de)，無(wu)法(fa)接(jie)通(tong)總(zong)電(dian)源(yuan)接(jie)觸(chu)器(qi)的(de)啟(qi)動(dong)控(kong)製(zhi)回(hui)路(lu)。隻(zhi)有(you)把(ba)全(quan)部(bu)凸(tu)輪(lun)控(kong)製(zhi)器(qi)手(shou)柄(bing)置(zhi)於(yu)零(ling)位(wei)
，總(zong)電(dian)源(yuan)接(jie)觸(chu)器(qi)線(xian)圈(quan)的(de)啟(qi)動(dong)控(kong)製(zhi)回(hui)路(lu)才(cai)能(neng)構(gou)成(cheng)通(tong)路(lu)，總(zong)電(dian)源(yuan)才(cai)能(neng)接(jie)通(tong)。

      機構電動機采用主令控製器和接觸器（控製屏）控(kong)製(zhi)的(de)，一(yi)般(ban)把(ba)主(zhu)令(ling)控(kong)製(zhi)器(qi)的(de)零(ling)位(wei)觸(chu)頭(tou)串(chuan)入(ru)零(ling)位(wei)繼(ji)電(dian)器(qi)的(de)控(kong)製(zhi)回(hui)路(lu)中(zhong)，實(shi)現(xian)零(ling)位(wei)保(bao)護(hu)。主(zhu)令(ling)控(kong)製(zhi)器(qi)手(shou)柄(bing)不(bu)在(zai)零(ling)位(wei)時(shi)

，零(ling)位(wei)觸(chu)頭(tou)是(shi)斷(duan)開(kai)的(de)，零(ling)位(wei)繼(ji)電(dian)器(qi)控(kong)製(zhi)線(xian)圈(quan)回(hui)路(lu)斷(duan)電(dian)，機(ji)構(gou)電(dian)動(dong)機(ji)控(kong)製(zhi)回(hui)路(lu)無(wu)電(dian)，此(ci)時(shi)總(zong)電(dian)源(yuan)可(ke)以(yi)接(jie)通(tong)。但(dan)總(zong)電(dian)源(yuan)接(jie)通(tong)的(de)同(tong)時(shi)，零(ling)位(wei)繼(ji)電(dian)器(qi)不(bu)能(neng)動(dong)作(zuo)，機(ji)構(gou)電(dian)動(dong)機(ji)不(bu)能(neng)同(tong)時(shi)啟(qi)動(dong)。

       零位保護一般通過通電試驗的方法檢驗。 
       jigoudiandongjicaiyongtulunkongzhiqizhijiekongzhidejianyanfangfaguanduanzongdianyuan
，bingbaqizhongyigekongzhiqishoubingbanlilingwei
，ranhouzuojietongzongdianyuandecaozuo，zongdianyuanyingbunengjietong。basuoyoukongzhiqishoubingzhiyulingwei，zongdianyuancainengjietong。

       機ji構gou電dian動dong機ji采cai用yong主zhu令ling控kong製zhi器qi和he接jie觸chu器qi控kong製zhi的de檢jian驗yan方fang法fa關guan斷duan總zong電dian源yuan，把ba主zhu令ling控kong製zhi器qi扳ban離li零ling位wei，置zhi於yu運yun行xing位wei置zhi
，再zai接jie通tong總zong電dian源yuan。總zong電dian源yuan接jie通tong時shi，機ji構gou電dian動dong機ji不bu能neng同tong時shi啟qi動dong。

（五）電動機的過載保護

      起重機上的電動機額定功率大於!$% 的，均應單獨設置過載保護。過載保護的方式較多，一般采用過電流繼電器或帶熱脫扣器的斷路器。

      guodianliubaohushimuqianqizhongjipubiancaiyongdediandongjiguozaibaohufangshi。yibanjiangguodianliujidianqixianquanjierudiandongjizhuhuiluzhong，liansuochudianjieruzongdianyuandeanquanliansuohuiluzhonghuolingweijidianqixianquankongzhihuiluzhong。

      過電流時
，斷開總電源或機構電動機控製電源

，使電動機停止工作。
      過電流保護的檢驗，主要是對設置和整定的檢驗。安裝使用單位自檢
，還應做過電流繼電
器的動作試驗。 

     設置檢驗除柴油機—fadongjigongdianxitonghuoshulongxingdiandongjiqudongdejigouhefuzhujigou，duimeitaojigoulidemeigediandongjidoubixudandushezhiguoliubaohu，sanxiangraoxianxingyibudiandongjiyunxuzhizailiangxiangzhongshezhi
，zhiliudiandongjiyunxuyongyigeguoliubaohu。suoyoudiandongjidedisanxiangshezhizongguoliubaohu
，dongzuoshiduankaizongdianyuan。

      整定電流值的檢驗采用瞬時動作的過電流繼電器保護繞線型異步電動機，其動作電流約為電動機額定電流的 倍bei。所suo有you電dian動dong機ji第di三san相xiang的de總zong過guo流liu保bao護hu繼ji電dian器qi的de動dong作zuo電dian流liu
，約yue為wei起qi重zhong機ji容rong量liang最zui大da機ji構gou的de所suo有you電dian動dong機ji額e定ding電dian流liu之zhi和he的de倍bei並bing加jia上shang其qi餘yu可ke能neng同tong時shi動dong作zuo的de各ge機ji構gou電dian動dong機ji額e定ding電dian流liu之zhi和he。有you主zhu副fu鉤gou時shi，副fu鉤gou電dian動dong機ji不bu計ji入ru最zui大da機ji構gou；抓鬥起重機，起升電動機和抓鬥開閉電動機應同時計入最大機構。
     caiyongshunshidongzuoguodianliujidianqibaohuzhiliudiandongji
，andiandongjizuidayunxudianliudebeizhengdingdongzuodianliu。gongzuozhuansubudayuedingzhuansu，diandongjiedinggonglvweishi
，zuidayunxudianliuyueweidiandongjiedingdianliude 倍；電動機額定功率為，最大允許電流約為電動機額定電流的倍
；電動機額定功率大於，最大允許電流約為電動機額定電流的倍。
     工作轉速大於額定轉速時
，最大允許電流約為上述各種情況下的最大允許電流的倍。