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振動篩在正常運(yun)轉時，由于物料的種(zhong)種(zhong)特性，形(xing)狀不(bu)同會產(chan)生(sheng)各種(zhong)形(xing)態的篩孔堵塞。
堵塞的原(yuan)因主要有(you)如下幾點：
1、含(han)有大量接近分離(li)點(dian)的粒子；
2、物料含(han)水(shui)量較(jiao)高；
3、球形粒子或(huo)者(zhe)對篩孔具有多接觸點的物(wu)料(liao)；
4、會發生靜電；
5、物料(liao)具有纖維(wei)質(zhi)的物料(liao)；
6、片狀顆粒(li)較多；
7、編(bian)織篩網(wang)絲經過(guo)粗；
8、橡(xiang)膠篩網(wang)等較厚的(de)篩網(wang)，孔形設計不合理(li)，沒有(you)達到上小下大(da)，而使顆粒(li)(li)卡住。因(yin)(yin)為需要篩分的(de)物料(liao)顆粒(li)(li)大(da)部分是不規(gui)則的(de)，因(yin)(yin)此，堵塞原因(yin)(yin)也是多(duo)種多(duo)樣的(de)。


為有效地(di)防(fang)止(zhi)振動篩(shai)(shai)篩(shai)(shai)網堵塞，應針對(dui)上述篩(shai)(shai)孔堵塞原因(yin)采(cai)取措施:
1、當物料粒(li)度較(jiao)細、泥質含量較(jiao)多、且篩分粒(li)度較(jiao)小時，水分對篩網的堵塞(sai)就起決定性的作用。
2、當(dang)物(wu)料(liao)中(zhong)水分大于5%時，如(ru)果無條件對物(wu)料(liao)進行干燥，應對篩面、篩孔作針(zhen)對性選擇。
3、當水分大于8%時(shi)，應采(cai)用濕(shi)式篩分。
4、對(dui)片狀顆(ke)粒較多的(de)物料(liao)，則需要改(gai)變物料(liao)破(po)碎(sui)方式(shi)(shi)及不同破(po)碎(sui)方式(shi)(shi)流程(cheng)的(de)粒度搭(da)配。
      合(he)理調節篩(shai)(shai)網張緊力是(shi)減少(shao)篩(shai)(shai)網堵(du)孔的(de)(de)一(yi)種有效(xiao)方法，合(he)理的(de)(de)張緊力使篩(shai)(shai)網同(tong)支撐樑產生(sheng)輕(qing)微(wei)的(de)(de)二次振動，從而有效(xiao)降低堵(du)孔現象的(de)(de)發生(sheng)，具體做法是(shi)，把張緊鉤做成恒力張緊機構，即在張緊螺栓(shuan)上(shang)加裝(zhuang)彈簧。 
     振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)篩(shai)(shai)(shai)作為非標(biao)設(she)(she)備(bei)(bei)(bei)對(dui)于(yu)多數振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)設(she)(she)備(bei)(bei)(bei)用戶(hu)來(lai)說(shuo)，振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)篩(shai)(shai)(shai)可(ke)能在用戶(hu)所有的(de)(de)設(she)(she)備(bei)(bei)(bei)中算不上什么(me)重大(da)設(she)(she)備(bei)(bei)(bei)；但(dan)是(shi)(shi)振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)篩(shai)(shai)(shai)的(de)(de)故障(zhang)頻(pin)率卻(que)高(gao)于(yu)傳統的(de)(de)動(dong)(dong)(dong)(dong)(dong)(dong)力(li)機(ji)械(xie)產(chan)品(pin)，原因(yin)是(shi)(shi)振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)設(she)(she)備(bei)(bei)(bei)本身就(jiu)是(shi)(shi)一(yi)種(zhong)對(dui)振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)破壞力(li)進行(xing)科學(xue)利用的(de)(de)一(yi)種(zhong)產(chan)品(pin)。對(dui)于(yu)傳統機(ji)械(xie)來(lai)說(shuo)設(she)(she)備(bei)(bei)(bei)產(chan)生(sheng)(sheng)(sheng)(sheng)振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)就(jiu)意味著故障(zhang)的(de)(de)發(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)征兆，而振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)設(she)(she)備(bei)(bei)(bei)恰(qia)(qia)恰(qia)(qia)是(shi)(shi)通(tong)過振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)來(lai)完成(cheng)人們所需(xu)的(de)(de)工作目的(de)(de)和(he)要(yao)求(qiu)的(de)(de)一(yi)種(zhong)產(chan)品(pin)。雖然(ran)振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)行(xing)業都在致力(li)于(yu)，振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)設(she)(she)備(bei)(bei)(bei)自身的(de)(de)抗(kang)破壞性優化結構設(she)(she)計和(he)研究，但(dan)是(shi)(shi)振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)設(she)(she)備(bei)(bei)(bei)的(de)(de)故障(zhang)還是(shi)(shi)頻(pin)繁發(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)。并且振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)篩(shai)(shai)(shai)往往是(shi)(shi)布置(zhi)在用戶(hu)生(sheng)(sheng)(sheng)(sheng)產(chan)工藝(yi)的(de)(de)咽(yan)喉部(bu)位，一(yi)旦振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)篩(shai)(shai)(shai)出現故障(zhang)，將(jiang)會導致整個生(sheng)(sheng)(sheng)(sheng)產(chan)系統聯動(dong)(dong)(dong)(dong)(dong)(dong)停車，給用戶(hu)帶來(lai)重大(da)的(de)(de)生(sheng)(sheng)(sheng)(sheng)產(chan)損失。就(jiu)礦山、煤炭(tan)、冶金(jin)企業來(lai)說(shuo)，如這樣突然(ran)停車修(xiu)(xiu)復一(yi)天(tian)的(de)(de)話，直接生(sheng)(sheng)(sheng)(sheng)產(chan)效(xiao)益(yi)損失少則(ze)十(shi)數萬(wan)、多則(ze)數十(shi)萬(wan)甚至數百(bai)萬(wan)元(yuan)。要(yao)想避免此類現象(xiang)發(fa)(fa)(fa)生(sheng)(sheng)(sheng)(sheng)，用戶(hu)只有隨時掌握振(zhen)(zhen)動(dong)(dong)(dong)(dong)(dong)(dong)篩(shai)(shai)(shai)的(de)(de)運行(xing)狀況，及時發(fa)(fa)(fa)現隱患(huan)提前做好檢修(xiu)(xiu)安排。