隔膜泵的工作原理及結構

隔(ge)膜(mo)泵(beng)是容積泵(beng)中較為特殊的種(zhong)形(xing)式(shi)。它是依靠(kao)個隔(ge)膜(mo)片的來(lai)回鼓動而(er)改變工作室容積以吸(xi)人和排出液體(ti)的。

隔(ge)膜泵的(de)結構

隔(ge)(ge)(ge)膜(mo)(mo)泵主要由傳(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)部(bu)(bu)分(fen)和隔(ge)(ge)(ge)膜(mo)(mo)缸頭兩大(da)部(bu)(bu)分(fen)組成。傳(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)部(bu)(bu)分(fen)是帶動(dong)(dong)(dong)(dong)(dong)隔(ge)(ge)(ge)膜(mo)(mo)片(pian)來回(hui)鼓動(dong)(dong)(dong)(dong)(dong)的驅(qu)動(dong)(dong)(dong)(dong)(dong)機(ji)構(gou)(gou)，它的傳(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)形式有機(ji)械傳(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)、液(ye)壓(ya)(ya)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)和氣壓(ya)(ya)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)等(deng)。其(qi)(qi)中應用較為廣泛(fan)的是液(ye)壓(ya)(ya)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)。如圖5-1所示為液(ye)壓(ya)(ya)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)的隔(ge)(ge)(ge)膜(mo)(mo)泵，隔(ge)(ge)(ge)膜(mo)(mo)泵的工作部(bu)(bu)分(fen)主要由曲柄連桿(gan)機(ji)構(gou)(gou)（圖5-1中未畫(hua)出）、柱塞(sai)、液(ye)缸、隔(ge)(ge)(ge)膜(mo)(mo)、泵體、吸入(ru)閥(fa)和排出閥(fa)等(deng)組成，其(qi)(qi)中由曲軸連桿(gan)、柱塞(sai)和液(ye)缸構(gou)(gou)成的驅(qu)動(dong)(dong)(dong)(dong)(dong)機(ji)構(gou)(gou)與往(wang)復柱塞(sai)泵十分(fen)相(xiang)似(si)。



隔膜泵(beng)的工作原理

隔(ge)膜(mo)(mo)(mo)泵(beng)(beng)工(gong)作(zuo)時(shi)(shi)，曲(qu)柄(bing)連桿(gan)機(ji)構(gou)在電動(dong)(dong)(dong)(dong)機(ji)的驅動(dong)(dong)(dong)(dong)下，帶(dai)動(dong)(dong)(dong)(dong)柱塞(sai)做往復運(yun)動(dong)(dong)(dong)(dong)，柱塞(sai)的運(yun)動(dong)(dong)(dong)(dong)通(tong)過液缸(gang)內(nei)的工(gong)作(zuo)液體（般為油）而(er)傳到(dao)隔(ge)膜(mo)(mo)(mo)，使隔(ge)膜(mo)(mo)(mo)來回鼓(gu)動(dong)(dong)(dong)(dong)。隔(ge)膜(mo)(mo)(mo)泵(beng)(beng)缸(gang)頭部分主要由(you)隔(ge)膜(mo)(mo)(mo)片將被輸送的液體和工(gong)作(zuo)液體分開(kai)(kai)，當隔(ge)膜(mo)(mo)(mo)片向傳動(dong)(dong)(dong)(dong)機(ji)構(gou)邊運(yun)動(dong)(dong)(dong)(dong)時(shi)(shi)，泵(beng)(beng)缸(gang)內(nei)工(gong)作(zuo)室為負壓而(er)吸(xi)人液體；當隔(ge)膜(mo)(mo)(mo)片向另邊運(yun)動(dong)(dong)(dong)(dong)時(shi)(shi)，則(ze)排出液體。被輸送的液體在泵(beng)(beng)缸(gang)內(nei)被膜(mo)(mo)(mo)片與(yu)(yu)工(gong)作(zuo)液體隔(ge)開(kai)(kai)，只與(yu)(yu)泵(beng)(beng)缸(gang)、吸(xi)入閥、排出閥及隔(ge)膜(mo)(mo)(mo)片的泵(beng)(beng)內(nei)側接觸，而(er)不接觸柱塞(sai)以及密封裝置，這就使柱塞(sai)等重要零件*在油介質中工(gong)作(zuo)，處于良(liang)好的工(gong)作(zuo)狀態。

隔(ge)膜(mo)片(pian)不(bu)僅要有良好的(de)柔韌(ren)性，還要有較好的(de)耐(nai)腐蝕性能(neng)，通常用聚四氟乙烯(xi)、橡膠等(deng)材料制成。

隔膜片(pian)兩側帶(dai)有網孔的(de)鍋底狀零(ling)件(jian)是為了(le)防止(zhi)膜片(pian)局部產生過大(da)的(de)變形而設置的(de)，般(ban)稱為膜片(pian)限制器。

隔(ge)膜泵的密封性能(neng)較好．能(neng)夠較為容易(yi)地達到無(wu)泄(xie)漏運行(xing)，可(ke)用(yong)于輸送酸(suan)、堿、鹽等腐蝕性液(ye)體(ti)及高黏(nian)度液(ye)體(ti)。