煤礦通風機風葉角度與風量有什么關系？

煤礦(kuang)通風機性(xing)能(neng)測定的主要參數是某(mou)一(yi)風葉角 度下不同工況的風壓，風量和功率(lv)。 ;
改變前(qian)導葉片的角(jiao)度可以改變通風機入口的風流速度，從而(er)改變通風機所產(chan)生的壓力。 
 實現通風機經濟運行的(de)幾(ji)種(zhong)途徑 
　　1.減少風(feng)機徑向間隙 
　　（1）局(ju)部更換(huan)機殼，為使緊(jin)靠(kao)動(dong)葉處的圓筒不因碰撞和振動(dong)而(er)引起變(bian)形，可在此(ci)處將外(wai)殼分成兩段(duan)，加工一(yi)厚(hou)30mm的圓環(huan)(huan)，并對其(qi)鍍鋅防腐處理，用(yong)此(ci)環(huan)(huan)將兩段(duan)外(wai)殼聯(lian)接(jie)在一(yi)起。該項改造(zao)費用(yong)較(jiao)小(xiao)，可防止(zhi)機殼變(bian)形。 
　　（2）對那(nei)些徑(jing)向(xiang)間隙大機殼變(bian)形量小的(de)(de)風機可采用加大風葉長(chang)度的(de)(de)方(fang)法來縮卸向(xiang)間隙，提(ti)高(gao)風機的(de)(de)容積效率。 
　　（3）對那(nei)些橢(tuo)圓度較大或(huo)局部超差的風(feng)機外殼可采用修(xiu)補機殼內(nei)壁的方法，把(ba)滑石粉加環氧樹脂后均勻(yun)攪拌成(cheng)漿糊狀，然(ran)后加入二(er)丁脂、乙二(er)胺，攪拌均勻(yun)即可，涂(tu)抹(mo)前應(ying)對機殼內(nei)壁進(jin)行除銹處理。該法雖不能完全解(jie)決變(bian)形達到間隙(xi)填補均勻(yun)，但此法操作簡單，施(shi)工經濟，有(you)一定的實用價值。  
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