耐腐蝕磁力泵和屏蔽泵使用選型，哪種適用！?。?/title>
<div align="center"><span style="font-size:14px">作者：wjbf 來源：wj 發布時間：2019-03-12</span></div>
<span style="font-size:16px;"> <img alt="耐腐蝕磁力泵" src="http://www.xczscq.com/d/file/bengfawenda/2019-03-12/458b65526c461a7768cc36dab07e22d8.jpg" style="width: 500px; height: 535px;" /><br /> 現在化工行業中對化工泵泄漏帶來的麻煩很是煩惱，很多在選用化工泵是考慮是選擇磁力泵呢還是屏蔽泵呢？對這兩種泵的優勢和缺點有什么不同，性能和要求有哪些不一樣呢？國內的化工廠家還是比較偏向于磁力泵，因為國內的磁鋼技術已經發展到很成熟的階段，從以前的不銹鋼加強套發展演變到現在的PEEK炭纖維隔離套，解決了因高溫退磁等等導致磁力泵不好用的原因。且目前國內襯氟磁力泵、不銹鋼磁力泵，幾乎已經可以滿足任何工況，使用前景十分廣泛。<br /> <img alt="磁力泵" src="http://www.xczscq.com/d/file/bengfawenda/2019-03-12/32968b7089e8ee2943dff87239098f7b.jpg" style="width: 500px; height: 478px;" /><br />一、磁力泵和屏蔽泵的優、缺點對比<br /> 化工磁力泵和屏蔽泵的共同優點就是都是屬于無泄漏的泵，沒有軸封，從而達到無泄漏的實際使用情況。那么廣大化工廠家應該如何選擇？<br />1、磁力泵的電機是普通電機，電機軸和泵軸是2根軸，通過普通聯軸器連接（如果電機是空心軸，泵軸就直接插在電機上，也稱直聯式結構）。泵軸上裝有一個圓筒形的外磁剛體，外磁鋼內表面均勻布置著NS極相見排列的永磁體。泵的轉動部件裝有一個圓筒形的內磁鋼，內磁鋼外表面同樣均勻布置著NS極相見排列的永磁體。電機帶動外磁鋼旋轉，由于永磁體的相互吸引，外磁鋼帶動內磁鋼同步旋轉（這種方式也成為磁力聯軸器）；進而帶動葉輪或主動螺桿旋轉。內磁鋼與介質接觸，內外磁鋼之間加一個非磁性材料制作的隔離套，隔離套固定在泵端蓋上，這樣將被抽送的介質以靜密封的形式密封在隔離套內。磁力泵主要用在高端應用場合，比如在輸送強酸、強堿、液氯等有害介質時是理想的選擇。<br /> <img alt="磁力泵" src="http://www.xczscq.com/d/file/bengfawenda/2019-03-12/99f89e1876b9ec20593fafb0c8a33452.jpg" style="width: 500px; height: 603px;" /><br />2、屏蔽泵的泵軸與電機軸共用一根軸，葉輪裝在這根公共軸上。電機與泵融為一體。它其實就是把電機里面的轉子和定子隔離開，電機轉子與葉輪都做在公共軸上，轉子與葉輪一起旋轉。轉子外面再做一個屏蔽套密封起來，這樣介質與轉子接觸，被密封在屏蔽套里面。電機定子繞組在屏蔽套外周，直接利用電動機的原理來驅動葉輪（屏蔽泵這種電機設計是一種屏蔽式專用電機）。<br />二、維護成本比較<br />1、屏蔽泵效果就相同于把泵與電機封在同一個密封殼中。從兩種泵的結構上可以看出來。屏蔽泵的缺點在于幾乎無法維修，用戶基本都沒有辦法自己維修。<br />2、磁力泵修理起來跟普通的離心泵沒有太大的區別，而且，屏蔽泵的電機軸承與介質直接接觸，使用壽命可想而知。重要的一點，磁力泵的隔離套厚度是屏蔽泵的三倍以上，所以密封性跟可靠性更有保障。<br /> <img alt="磁力泵" src="http://www.xczscq.com/d/file/bengfawenda/2019-03-12/91fe34f3a0396c58675bc256a8cafea5.jpg" style="width: 500px; height: 393px;" /><br />三、性能比較<br />1、屏蔽泵的結構比普通的磁力泵的結構更加緊湊，占地面積小，省空間。<br />2、磁力泵在輸送介質過程中，是不允許輸送含有金屬顆粒（如鐵屑）的。因為鐵磁性材料會被磁鋼吸附，從而導致損壞，引起故障，但是屏蔽泵就可以處理。<br />四、不論選擇哪種類型的泵，就要看現場實際使用工況了。如果只要購買成本低（初始投資成本），安裝工況預留空間不大或是實際輸送介質中，含有鐵屑等金屬，硬質顆粒的建議選擇屏蔽泵。<br /> 但是考慮到后期使用的維護成本，介質的腐蝕性比較強，介質危險性比較高，還是建議大家選擇磁力泵，耐腐蝕性要求較高的建議選擇襯氟磁力泵，要求耐溫性能高的建議選擇不銹鋼材質磁力泵和耐高溫氟塑料磁力泵的安全性能要比屏蔽泵高很多。 </span><br /><br /> </div>
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