承德伺服行星減速機的選擇四大原則

文章出處(chu)：admin 人氣：發表(biao)時(shi)間：2021-01-04 16:11

齒(chi)輪伺(si)服行(xing)星減(jian)速(su)機的選(xuan)擇原則，主要是根據(ju)齒(chi)輪減(jian)速(su)機本身和負載的特點(dian)，以及電源的性質來選(xuan)用。在使用過程中，不可隨意更(geng)換與(yu)齒(chi)輪減(jian)速(su)機銘牌不相符的電動機。

1、根據(ju)電源來選

電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)的供電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)有單(dan)相(xiang)和(he)三(san)相(xiang)兩種(zhong)，.單(dan)相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)大(da)多數是220伏(fu)，而(er)許(xu)多場合也(ye)有采(cai)(cai)用12,24,36,42或110伏(fu)的。在(zai)國(guo)外，也(ye)有采(cai)(cai)用100伏(fu)或220伏(fu)的。三(san)相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)多數采(cai)(cai)用三(san)相(xiang)380伏(fu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)，但(dan)也(ye)有采(cai)(cai)用36,42或220伏(fu)的三(san)相(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)。在(zai)頻率方面，我國(guo)及部(bu)分國(guo)家采(cai)(cai)用50赫，而(er)世界上(shang)如歐美一些(xie)國(guo)家也(ye)有采(cai)(cai)用60赫的。因(yin)此，在(zai)使(shi)(shi)用前應首先(xian)認(ren)清電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)的使(shi)(shi)用電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(銘(ming)牌額定電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya))和(he)頻率是否和(he)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)一致，如果(guo)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)高于或低于電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)的使(shi)(shi)用電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)太多，均會使(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)燒(shao)毀。在(zai)提供設計時，電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)允許(xu)電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)波動(dong)(dong)(dong)士5%不影響電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)正(zheng)常工(gong)作。為(wei)確(que)保電(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)(dong)機(ji)(ji)能(neng)(neng)正(zheng)常工(gong)作，又不改(gai)變它的性能(neng)(neng)。煤泥烘干機(ji)(ji)

2、根(gen)據電動(dong)機起動(dong)情況(kuang)來選

對于起(qi)動(dong)(dong)(dong)頻(pin)繁的(de)(de)電(dian)(dian)動(dong)(dong)(dong)機(ji)，即起(qi)動(dong)(dong)(dong)頻(pin)率(lv)為10-20次(ci)/分，在選(xuan)用電(dian)(dian)動(dong)(dong)(dong)機(ji)時應(ying)適當選(xuan)用較大容量(liang)的(de)(de)電(dian)(dian)動(dong)(dong)(dong)機(ji)。因為電(dian)(dian)動(dong)(dong)(dong)機(ji)起(qi)動(dong)(dong)(dong)時的(de)(de)起(qi)動(dong)(dong)(dong)電(dian)(dian)流較大，其相應(ying)的(de)(de)輸入功率(lv)也就比較大，因此選(xuan)用功率(lv)較大的(de)(de)電(dian)(dian)動(dong)(dong)(dong)機(ji)會(hui)使負(fu)載功率(lv)與電(dian)(dian)動(dong)(dong)(dong)機(ji)功率(lv)相比就小，所以電(dian)(dian)機(ji)的(de)(de)溫升就不致于過高。

3、根據與負載匹配情況來選(xuan)

選用電(dian)(dian)容運(yun)轉異步電(dian)(dian)動機時，其功(gong)率應與負載功(gong)率大體一致，不能(neng)有(you)過大的(de)余量，因(yin)為(wei)電(dian)(dian)容運(yun)轉電(dian)(dian)動機在空載或接近空載時，其損耗相對來說就(jiu)更大，所以溫(wen)升(sheng)(sheng)也就(jiu)比較高，如果長期工作(zuo)在這種情(qing)況下(xia)，電(dian)(dian)動機溫(wen)月一將有(you)可能(neng)超(chao)過允許溫(wen)升(sheng)(sheng)，加速電(dian)(dian)動機的(de)絕(jue)緣老化，嚴(yan)重的(de)有(you)可能(neng)導致電(dian)(dian)動機燒毀(hui)。

4、根據(ju)負載(zai)的過轉矩情況來選

齒輪伺(si)服行星減(jian)速(su)機(ji)(ji)在經常出現負載(zai)過轉矩(ju)的(de)(de)情(qing)況下，不宜(yi)采用(yong)單相電(dian)(dian)(dian)限起(qi)動(dong)異(yi)步電(dian)(dian)(dian)動(dong)機(ji)(ji)和電(dian)(dian)(dian)容起(qi)動(dong)異(yi)步電(dian)(dian)(dian)動(dong)機(ji)(ji)，因(yin)為當負載(zai)轉矩(ju)比電(dian)(dian)(dian)動(dong)機(ji)(ji)的(de)(de)額(e)定轉矩(ju)大(da)時(shi)，會(hui)使電(dian)(dian)(dian)動(dong)機(ji)(ji)的(de)(de)轉速(su)有(you)可(ke)能(neng)(neng)降低到(dao)75%-80%同步轉速(su)或更低，這(zhe)時(shi)電(dian)(dian)(dian)動(dong)機(ji)(ji)的(de)(de)離心開(kai)關有(you)可(ke)能(neng)(neng)重新閉合。如(ru)果這(zhe)種情(qing)況出現的(de)(de)比較(jiao)多或者(zhe)每次時(shi)間(jian)延續(xu)的(de)(de)比較(jiao)長(chang)，起(qi)動(dong)繞組(zu)就會(hui)重新投(tou)人(ren)工作(zuo)。由于在設計時(shi)，電(dian)(dian)(dian)動(dong)機(ji)(ji)的(de)(de)起(qi)動(dong)繞組(zu)只短(duan)時(shi)投(tou)人(ren)上作(zuo)，電(dian)(dian)(dian)流(liu)密(mi)度(du)選取(qu)的(de)(de)比較(jiao)高，若工作(zuo)時(shi)間(jian)太長(chang)，有(you)可(ke)能(neng)(neng)將(jiang)起(qi)動(dong)繞組(zu)燒壞，因(yin)此只能(neng)(neng)選用(yong)其它型式的(de)(de)電(dian)(dian)(dian)動(dong)機(ji)(ji)。