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電動執行器配件三相異步電動機閥(fa)門專用電機常見故障如下：

防(fang)護等(deng)級低：電裝配套的閥門專(zhuan)用(yong)電機為(wei)全封(feng)閉鼠籠(long)式(shi)結(jie)構,短(duan)時斷續工(gong)作制(10 min)自(zi)冷卻式(shi)。按GB 4942. 1 - 85要求(qiu),防(fang)護等(deng)級IP44 ,防(fang)護等(deng)級IP68。閥門使用(yong)工(gong)況和(he)環境等(deng)不同,要求(qiu)的防(fang)護等(deng)級也不同。防(fang)護等(deng)級低將(jiang)造成電機內腔受潮或有粉塵等(deng)異(yi)物(wu)侵入,電機絕緣阻值下(xia)降引起損壞。

包(bao)裝、運輸(shu)及保管(guan)不當:閥門電裝包(bao)裝應(ying)(ying)有防(fang)雨、防(fang)潮、防(fang)塵措施,包(bao)裝應(ying)(ying)牢固可靠(kao)。運輸(shu)過程(cheng)中應(ying)(ying)有防(fang)雨措施,產品到現場后應(ying)(ying)存放在通(tong)風、干燥處,不得露天存放。禁止(zhi)在陰(yin)雨天氣(qi)調(diao)試或檢修,調(diao)試完畢后要擰(ning)緊全部緊固件(jian),以保證所有電氣(qi)部分密封嚴(yan)密可靠(kao)。

閥(fa)(fa)門(men)電(dian)裝(zhuang)選(xuan)型與行程位置(zhi)調(diao)整控制(zhi)不當：閥(fa)(fa)門(men)電(dian)裝(zhuang)有(you)兩個重要參數。啟(qi)閉力(li)矩(ju)值應(ying)包括(kuo)閥(fa)(fa)門(men)實(shi)際工(gong)作(zuo)扭矩(ju)值加上閥(fa)(fa)門(men)自身扭矩(ju)值,啟(qi)閉力(li)矩(ju)大小影(ying)響(xiang)閥(fa)(fa)門(men)使用,力(li)大易壞,力(li)小易漏。在選(xuan)型配套上應(ying)有(you)足夠的(de)余量(一般要求大于(yu)閥(fa)(fa)門(men)實(shi)際操作(zuo)轉矩(ju)值1. 11. 3倍)。行程位置(zhi)控制(zhi)與閥(fa)(fa)門(men)口徑大小、啟(qi)閉時(shi)間(jian)長短及結(jie)構(gou)形式等(deng)有(you)關。閥(fa)(fa)門(men)電(dian)裝(zhuang)配套的(de)電(dian)機(ji)為(wei)專用電(dian)機(ji),短時(shi)工(gong)作(zuo)制(zhi),時(shi)間(jian)10 - 15min。如在短時(shi)工(gong)作(zuo)時(shi)間(jian)內高負(fu)載(zai),造成電(dian)機(ji)發熱絕緣等(deng)級下降造成損壞。

電動執行器配件三相異步電動機

閥門電(dian)裝與電(dian)機型(xing)號(hao)不(bu)匹配：所選的電(dian)機型(xing)號(hao)與電(dian)裝要求不(bu)匹配,實際(ji)輸出力矩未留有足夠相(xiang)應的余(yu)量,超載荷運轉時易(yi)造成電(dian)機損壞。

電(dian)器保護(hu)(hu)(hu)失靈,電(dian)器元件(jian)質量(liang)差：閥門電(dian)裝(zhuang)內的微(wei)動(dong)(dong)開(kai)關是控(kong)制(zhi)機(ji)構的關鍵零部件(jian),當(dang)閥門超過行(xing)程(cheng)(cheng)位置(zhi)時,微(wei)動(dong)(dong)開(kai)關切斷(duan)電(dian)源,起過載(zai)保護(hu)(hu)(hu)作用。大(da)多數電(dian)裝(zhuang)廠家將行(xing)程(cheng)(cheng)與力矩保護(hu)(hu)(hu)串聯(lian)在一起,當(dang)超行(xing)程(cheng)(cheng)或超力矩時,微(wei)動(dong)(dong)開(kai)關及時切斷(duan)交流接觸器線圈(quan)控(kong)制(zhi)電(dian)源,從(cong)而(er)切斷(duan)電(dian)機(ji)主回路。

調試安裝(zhuang)(zhuang)使用不當：閥(fa)門電(dian)(dian)(dian)裝(zhuang)(zhuang)分為(wei)水平安裝(zhuang)(zhuang)和垂直安裝(zhuang)(zhuang)2種。在(zai)垂直安裝(zhuang)(zhuang)時(shi)電(dian)(dian)(dian)機尾端在(zai)下方。在(zai)穿線(xian)套筒橡膠件密(mi)封失效時(shi),腔體內的潤滑油(you)脂(zhi)通過(guo)電(dian)(dian)(dian)纜出線(xian)口進入電(dian)(dian)(dian)機內腔易使繞組(zu)短(duan)路而燒壞電(dian)(dian)(dian)機。按JB 8528 - 1997規定(ding),電(dian)(dian)(dian)動(dong)裝(zhuang)(zhuang)置的手輪(lun)轉(zhuan)動(dong)方向(xiang)應與(yu)輸出軸轉(zhuan)動(dong)方向(xiang)一(yi)致,順時(shi)針為(wei)關(guan)閥(fa),逆時(shi)針為(wei)開閥(fa)。若電(dian)(dian)(dian)機實際轉(zhuan)動(dong)方向(xiang)與(yu)規定(ding)不符(fu),則(ze)需(xu)更(geng)換三相電(dian)(dian)(dian)源的任意兩(liang)相(對調即可)。否則(ze)因反相,使保護措施失效造成電(dian)(dian)(dian)機損壞。由(you)于閥(fa)門專用電(dian)(dian)(dian)機是(shi)高負載短(duan)時(shi)工(gong)作制。如果連續調試時(shi)間(jian)(jian)過(guo)長超(chao)過(guo)額(e)定(ding)時(shi)間(jian)(jian),導致電(dian)(dian)(dian)機發熱(re)損壞

閥門(men)(men)(men)(men)電(dian)裝(zhuang)(zhuang)(zhuang)與閥門(men)(men)(men)(men)連(lian)(lian)接(jie)不匹配(pei)：多(duo)回轉(zhuan)閥門(men)(men)(men)(men)電(dian)裝(zhuang)(zhuang)(zhuang)分為(wei)轉(zhuan)矩(ju)型和推力(li)型兩種。轉(zhuan)矩(ju)型大都為(wei)三爪連(lian)(lian)接(jie)或鍵連(lian)(lian)接(jie),閥門(men)(men)(men)(men)電(dian)裝(zhuang)(zhuang)(zhuang)不承(cheng)受軸向推力(li)。推力(li)型大多(duo)數為(wei)螺紋連(lian)(lian)接(jie),可承(cheng)受較大的(de)軸向推力(li)。為(wei)了閥門(men)(men)(men)(men)電(dian)裝(zhuang)(zhuang)(zhuang)與閥門(men)(men)(men)(men)連(lian)(lian)接(jie)之間不發生干(gan)涉(she)必須限(xian)制閥門(men)(men)(men)(men)配(pei)合面上(shang)部(bu)與閥門(men)(men)(men)(men)電(dian)裝(zhuang)(zhuang)(zhuang)有合適(shi)的(de)間隙。使安(an)裝(zhuang)(zhuang)(zhuang)在(zai)輸出軸上(shang)的(de)蝸輪(lun)軸向不竄位,確保(bao)蝸輪(lun)蝸桿中心嚙合平面有良好的(de)嚙合效果,保(bao)證傳遞扭(niu)矩(ju)達到額定的(de)輸出扭(niu)矩(ju)值。

電機內(nei)溫控保(bao)(bao)護失(shi)靈：電機內(nei)設有溫控開關,當閥門電機在過力矩時(shi)或長時(shi)間運轉時(shi),電機溫度升(sheng)高,超過設定溫度值(zhi)時(shi),溫控開關立即切斷控制回路,起到保(bao)(bao)護電機的作(zuo)用。

制定周期運行檢查制度:閥門電裝(zhuang)安裝(zhuang)調試后,應(ying)制定完整檢修制度。長時間不(bu)用的閥門電裝(zhuang),定期檢測電機定子(zi)繞組的絕緣電阻(zu)阻(zu)值(zhi)。