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水冷型磁力耦合器

    調(diao)(diao)節型磁(ci)(ci)力(li)耦合器是(shi)由(you)導(dao)體(ti)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)、永(yong)(yong)磁(ci)(ci)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)和調(diao)(diao)節器三部分組成。永(yong)(yong)磁(ci)(ci)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)在(zai)(zai)導(dao)體(ti)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)的(de)內(nei)側,其間(jian)(jian)由(you)空氣間(jian)(jian)隙(xi)(xi)分開,并(bing)隨各(ge)自安(an)裝的(de)旋(xuan)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)軸(zhou)獨立轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)動(dong);調(diao)(diao)節器調(diao)(diao)節永(yong)(yong)磁(ci)(ci)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)與(yu)(yu)(yu)導(dao)體(ti)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)之間(jian)(jian)的(de)間(jian)(jian)隙(xi)(xi),實現改變導(dao)體(ti)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)與(yu)(yu)(yu)永(yong)(yong)磁(ci)(ci)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)之間(jian)(jian)傳遞的(de)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)矩的(de)大(da)小導(dao)體(ti)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)安(an)裝在(zai)(zai)輸入軸(zhou)上(shang),永(yong)(yong)磁(ci)(ci)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)安(an)裝在(zai)(zai)輸出軸(zhou)上(shang),當導(dao)體(ti)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)動(dong)時,導(dao)體(ti)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)與(yu)(yu)(yu)永(yong)(yong)磁(ci)(ci)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)產生相對運動(dong),用磁(ci)(ci)場(chang)(chang)在(zai)(zai)導(dao)體(ti)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)上(shang)產生渦(wo)流(liu)(liu),同時渦(wo)流(liu)(liu)又產生感應磁(ci)(ci)場(chang)(chang)與(yu)(yu)(yu)永(yong)(yong)磁(ci)(ci)場(chang)(chang)相互作用,從而(er)帶(dai)動(dong)永(yong)(yong)磁(ci)(ci)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)沿與(yu)(yu)(yu)導(dao)體(ti)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)相同的(de)方向轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)動(dong),結果是(shi)將輸入軸(zhou)上(shang)的(de)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)矩傳遞到輸出軸(zhou)上(shang),輸出轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)矩的(de)大(da)小與(yu)(yu)(yu)導(dao)體(ti)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)與(yu)(yu)(yu)永(yong)(yong)磁(ci)(ci)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)子(zi)(zi)間(jian)(jian)的(de)間(jian)(jian)隙(xi)(xi)的(de)大(da)小有關,間(jian)(jian)隙(xi)(xi)越小,轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)矩越大(da),反之亦然。

◎優點

調速
可以(yi)根據(ju)現場(chang)的(de)實(shi)際運行工況(kuang),通過調節磁(ci)力耦合(he)器的(de)空氣(qi)間隙,從而實(shi)現調速,達到(dao)節能環保的(de)目的(de)。并(bing)且(qie)這種調速相對(dui)于高(gao)(gao)壓變頻器調速有較多的(de)優點,沒有高(gao)(gao)次諧波(bo)的(de)干擾(高(gao)(gao)次諧波(bo)對(dui)電(dian)(dian)網的(de)破壞(huai)較大(da),提高(gao)(gao)了(le)(le)電(dian)(dian)器儀(yi)表(biao)的(de)不可靠性,增加了(le)(le)現場(chang)故障判斷的(de)難度)。

a) 軟啟動
減少電(dian)機(ji)啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)負(fu)(fu)(fu)載,電(dian)機(ji)啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)容(rong)易(yi),啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)時間縮短。由于磁(ci)(ci)(ci)力(li)(li)耦(ou)合(he)(he)器(qi)(qi)(qi)的(de)銅(tong)(tong)轉(zhuan)子(zi)(zi)在(zai)電(dian)機(ji)啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)瞬間,沒有(you)切(qie)割(ge)磁(ci)(ci)(ci)力(li)(li)線(xian),沒有(you)感應磁(ci)(ci)(ci)場產生,因此(ci)銅(tong)(tong)轉(zhuan)子(zi)(zi)上沒有(you)力(li)(li)矩,而銅(tong)(tong)轉(zhuan)子(zi)(zi)本(ben)身的(de)轉(zhuan)動(dong)(dong)(dong)(dong)(dong)慣量又較小(xiao),所以(yi)電(dian)機(ji)等于近似地帶(dai)磁(ci)(ci)(ci)力(li)(li)耦(ou)合(he)(he)器(qi)(qi)(qi)的(de)銅(tong)(tong)轉(zhuan)子(zi)(zi)空載啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)。電(dian)機(ji)直接驅動(dong)(dong)(dong)(dong)(dong)負(fu)(fu)(fu)載時,從電(dian)機(ji)啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)到負(fu)(fu)(fu)載啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)整個(ge)過(guo)程是一次(ci)完成的(de)。加裝磁(ci)(ci)(ci)力(li)(li)耦(ou)合(he)(he)器(qi)(qi)(qi)傳動(dong)(dong)(dong)(dong)(dong)后,整個(ge)啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)過(guo)程變為兩個(ge)階段:****階段使電(dian)機(ji)先帶(dai)磁(ci)(ci)(ci)力(li)(li)耦(ou)合(he)(he)器(qi)(qi)(qi)的(de)銅(tong)(tong)轉(zhuan)子(zi)(zi)啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)。****階段是磁(ci)(ci)(ci)力(li)(li)耦(ou)合(he)(he)器(qi)(qi)(qi)的(de)銅(tong)(tong)轉(zhuan)子(zi)(zi)帶(dai)動(dong)(dong)(dong)(dong)(dong)永磁(ci)(ci)(ci)轉(zhuan)子(zi)(zi)全負(fu)(fu)(fu)荷啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)。因此(ci)整個(ge)啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)過(guo)程平(ping)穩(wen),沖擊小(xiao)。具有(you)軟啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)/軟停機(ji)功能(neng)特點,可(ke)以(yi)****地降(jiang)低電(dian)機(ji)的(de)啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)電(dian)流(liu)、解決水錘和(he)氣穴現象。電(dian)機(ji)和(he)負(fu)(fu)(fu)載可(ke)以(yi)有(you)選擇(ze)啟(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)和(he)停止,大大提高(gao)系統(tong)啟(qi)(qi)(qi)停性能(neng)。

b) 節能
可使電機始終工作在****大效率區,不會因過載的變動而波動很大。
可以根據系統工況進行水泵的轉速調整,可以節省大量的電能。
當電動機傳遞給負載的轉速由n1變化到n2時, Q、 H、 P與轉速的關系如下:

可見流(liu)量Q和(he)電(dian)機的(de)轉速(su)n是成(cheng)(cheng)正比關(guan)系的(de),而壓(ya)力(li)與轉速(su)的(de)二次方成(cheng)(cheng)正比,所需(xu)的(de)軸功(gong)率(lv)P與轉速(su)的(de)立方成(cheng)(cheng)正比關(guan)系。所以當需(xu)要80%的(de)額定流(liu)量時(shi),通過調節電(dian)機的(de)轉速(su)至額定轉速(su)的(de)80%,這時(shi)所需(xu)功(gong)率(lv)將(jiang)僅為(wei)原來(lai)的(de)51.2%,而此時(shi)系統的(de)水壓(ya)僅為(wei)原來(lai)的(de)64%。

減振
a) 大大降低了剛性聯軸器的振動放大傳遞。磁力耦合器取代了原來的剛性聯軸器,使電機和負載沒****械聯接,這樣負載側的振動就不會傳遞到電機側,電機側的振動也不會傳到負載側。同時也割斷了振動在傳遞過程中的放大效應,因此可以****剛性聯軸器的振動放大效應,降低系統的振動。
b) 可以大大降低軸彎曲、熱膨脹等原因引起的系統振動。
c) 大(da)大(da)延(yan)長軸承(cheng)和(he)(he)密封件的壽(shou)命。由于電機和(he)(he)負載(zai)(zai)之間沒****械聯(lian)接,沒有磨損(sun),降低了系(xi)統的振動幅度,延(yan)長電機和(he)(he)負載(zai)(zai),特別是大(da)大(da)延(yan)長軸承(cheng)和(he)(he)密封件的壽(shou)命。

無機械聯接
a) 具有過載保護功能,提高了整個電機驅動系統的可靠性。由于電機與負載之間沒****械聯接,當負載過載或者堵轉時,調速型磁力耦合器可自動的將電機對負載的力矩傳遞完全斷開,此時電機空載運行,負載停轉,可以完全****負載系統因過載而導致的系統損害和巨大損失。
b) 使查找和故障隔離變得非常容易。
c) 安裝簡單,維護工作量少。

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