一、什么是活塞真空泵
活(huo)塞(sai)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵,又(you)稱往(wang)復(fu)式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵,是(shi)靠活(huo)塞(sai)往(wang)復(fu)運動使泵腔(氣缸)的(de)工作容積周期性地變(bian)化來抽(chou)(chou)氣的(de)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵,多用于真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)浸漬、鋼水真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)處理、真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)蒸餾(liu)、真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)結晶、真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)過濾等方(fang)面抽(chou)(chou)除(chu)氣體。
二、活塞真空泵工作原理介紹
1、活塞真空泵的結構
活(huo)(huo)塞式真空(kong)泵的主(zhu)要部(bu)件(jian)(jian)是氣缸及在其中(zhong)做往復直線運(yun)動的活(huo)(huo)塞,活(huo)(huo)塞的驅動由曲柄連桿機構完成,除此之外還(huan)有排氣閥和吸氣閥兩個(ge)部(bu)件(jian)(jian)。
2、活塞式真空泵的原理
泵運轉時(shi),在電動(dong)機的(de)(de)驅(qu)動(dong)下,通(tong)過曲柄連(lian)桿機構的(de)(de)作用,使氣(qi)(qi)缸(gang)(gang)內的(de)(de)活(huo)塞做往(wang)復運動(dong)。在往(wang)復運動(dong)中(zhong),由于(yu)氣(qi)(qi)缸(gang)(gang)的(de)(de)左腔體積(ji)不斷增大,氣(qi)(qi)缸(gang)(gang)內氣(qi)(qi)體的(de)(de)密度(du)減(jian)少,而形成(cheng)抽氣(qi)(qi)過程,此時(shi)容器中(zhong)的(de)(de)氣(qi)(qi)體經過吸氣(qi)(qi)閥,當(dang)活(huo)塞達(da)到最(zui)右位置時(shi),氣(qi)(qi)缸(gang)(gang)內就完全充滿了氣(qi)(qi)體。
接著活(huo)(huo)塞從右(you)端向左端運(yun)動(dong),此時(shi)吸(xi)氣(qi)(qi)(qi)(qi)閥關(guan)閉,氣(qi)(qi)(qi)(qi)缸(gang)內的氣(qi)(qi)(qi)(qi)體(ti)隨著活(huo)(huo)塞從右(you)向左運(yun)動(dong)而逐漸被壓(ya)縮,當氣(qi)(qi)(qi)(qi)缸(gang)內氣(qi)(qi)(qi)(qi)體(ti)的壓(ya)強達到或(huo)稍大于一個(ge)大氣(qi)(qi)(qi)(qi)壓(ya)時(shi),排(pai)氣(qi)(qi)(qi)(qi)閥被打開,將氣(qi)(qi)(qi)(qi)體(ti)排(pai)到大氣(qi)(qi)(qi)(qi)中,完成一個(ge)工(gong)作循環。
如此重復循環工作,直到被抽容內的氣體壓力達到要(yao)求時為止。
三、活塞式真空泵真空度高嗎
和其他真(zhen)(zhen)空泵(beng)(beng)(beng)相比(bi),活(huo)塞式(shi)(shi)真(zhen)(zhen)空泵(beng)(beng)(beng)的(de)真(zhen)(zhen)空度并(bing)不太高,一般情況下,活(huo)塞式(shi)(shi)真(zhen)(zhen)空泵(beng)(beng)(beng)的(de)真(zhen)(zhen)空度受到氣(qi)閥(fa)密封性(xing)、泵(beng)(beng)(beng)腔內活(huo)塞環(huan)和泵(beng)(beng)(beng)體的(de)密封性(xing)、泵(beng)(beng)(beng)的(de)間隙(xi)三個因素的(de)影(ying)響,通常不超過95%,即(ji)0.05MPa。