无油式真空泵是一种旋(xuan)转(zhuan)式(shi)(shi)(shi)变容真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)须(xu)有(you)前级(ji)泵(beng)(beng)配合(he)方可(ke)使用在(zai)较宽的(de)压(ya)力范围内有(you)较大的(de)抽速对被(bei)抽除气体中含有(you)灰尘和(he)水(shui)(shui)蒸汽不敏(min)感广泛(fan)用于冶(ye)金、化(hua)工(gong)、食品(pin)、电子镀膜等(deng)行(xing)业(ye)。主(zhu)要有(you)WLW系列立(li)式(shi)(shi)(shi)无油(you)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、W型(xing)(xing)(xing)(xing)(xing)(xing)往复式(shi)(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、2X,2XZ型(xing)(xing)(xing)(xing)(xing)(xing)旋(xuan)片式(shi)(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、ZJ，ZJH型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)茨真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)（ZJH型(xing)(xing)(xing)(xing)(xing)(xing)为专利产真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)品(pin)）、2SK、SK型(xing)(xing)(xing)(xing)(xing)(xing)水(shui)(shui)环式(shi)(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、2BV、2BA型(xing)(xing)(xing)(xing)(xing)(xing)水(shui)(shui)环式(shi)(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、H、2H型(xing)(xing)(xing)(xing)(xing)(xing)滑阀真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、TLZ型(xing)(xing)(xing)(xing)(xing)(xing)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、SL型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)茨鼓风(feng)机(ji)、JZJHX型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)茨旋(xuan)片真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、JZJHS型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)茨水(shui)(shui)环真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、JZJHWLW型(xing)(xing)(xing)(xing)(xing)(xing)立(li)式(shi)(shi)(shi)无油(you)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、JZJP型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)茨水(shui)(shui)喷(pen)射真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、JZJHBA型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)茨水(shui)(shui)环真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、RPP型(xing)(xing)(xing)(xing)(xing)(xing)水(shui)(shui)喷(pen)射真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、JZJH2H型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)茨滑阀式(shi)(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)等(deng)型(xing)(xing)(xing)(xing)(xing)(xing)号(hao)。　　

　　工作原理：　

　　1.首先应(ying)该充分了解被(bei)抽气(qi)(qi)体(ti)(ti)成分。如气(qi)(qi)体(ti)(ti)中含(han)(han)不含(han)(han)可凝(ning)蒸(zheng)气(qi)(qi)、有(you)无(wu)颗(ke)粒灰尘、有(you)无(wu)腐蚀性(xing)(xing)、爆炸性(xing)(xing)等。如果气(qi)(qi)体(ti)(ti)中含(han)(han)有(you)蒸(zheng)气(qi)(qi)、颗(ke)粒、及腐蚀性(xing)(xing)气(qi)(qi)体(ti)(ti)，应(ying)该考虑在泵(beng)的进(jin)气(qi)(qi)口管路上安(an)装(zhuang)辅助设备，如冷(leng)凝(ning)器(qi)、除(chu)尘器(qi)等。如抽取(qu)气(qi)(qi)体(ti)(ti)还有(you)腐蚀性(xing)(xing)，则须选用材(cai)质。若抽取(qu)的气(qi)(qi)体(ti)(ti)具有(you)爆炸性(xing)(xing)，则应(ying)该选择水环(huan)式(shi)真空泵(beng)并且配防爆电机(ji)，因为水环(huan)式(shi)真空泵(beng)整个工(gong)作过程是等温的。　　

　　2.真(zhen)空设备(bei)或者(zhe)零部(bu)件对油污染(ran)的要求。若设备(bei)严(yan)格要求无(wu)油时，应(ying)该选各种无(wu)油泵(beng)，如：水环(huan)式真(zhen)空泵(beng)、分(fen)子(zi)筛吸附泵(beng)、溅(jian)射离子(zi)泵(beng)、低(di)温(wen)泵(beng)等。若要求不(bu)严(yan)格，可以选择(ze)有油泵(beng)，并且加上一些防油污染(ran)措施(shi)，如加冷阱、障板(ban)、挡油阱等，也能达(da)到清洁真(zhen)空要求。　　

　　3.真空(kong)泵排(pai)出来(lai)的油蒸(zheng)气对环(huan)境(jing)的影(ying)响如何。如果环(huan)境(jing)不允(yun)许有污染，可以选(xuan)无油真空(kong)泵如水环(huan)式真空(kong)泵，或(huo)者把油蒸(zheng)气排(pai)到室外。　　

　　4.如有多台大型(xing)水环(huan)式真空泵(beng)同(tong)时(shi)工作，循(xun)环(huan)液应(ying)该(gai)进行冷却(que)，否(fou)则影响真空度。冷却(que)装置可以配(pei)(pei)备(bei)冷却(que)塔(ta)，同(tong)时(shi)须配(pei)(pei)增压泵(beng)对管(guan)路加(jia)压。　

　　5.真(zhen)空(kong)(kong)(kong)泵的(de)工(gong)(gong)作压强(qiang)(qiang)应(ying)该满(man)足真(zhen)空(kong)(kong)(kong)设备(bei)的(de)极(ji)限真(zhen)空(kong)(kong)(kong)及工(gong)(gong)作压强(qiang)(qiang)要(yao)求。通常选择真(zhen)空(kong)(kong)(kong)泵泵的(de)真(zhen)空(kong)(kong)(kong)度(du)要(yao)高于真(zhen)空(kong)(kong)(kong)设备(bei)真(zhen)空(kong)(kong)(kong)度(du)半个(ge)到一个(ge)数量(liang)级(ji)。　

　　6.真(zhen)空(kong)泵在(zai)其工作压(ya)强下，应能(neng)排走真(zhen)空(kong)设(she)备工艺过程(cheng)中产生的(de)全部气体量。

它具有(you)结构(gou)简单(dan)、操作(zuo)容易(yi)、维护方便、不会(hui)污(wu)染(ran)环境等优点。无(wu)油(you)真(zhen)空泵耐用(yong)性好，是抽真(zhen)空，压(ya)缩，两用(yong)真(zhen)空泵，是一种应用(yong)范(fan)围非常广(guang)泛(fan)获得(de)真(zhen)空的基(ji)本设(she)备。

无油真空泵与油泵相(xiang)比真空度低(di)，抽气量小，但体积小巧，易于安装(zhuang)，维护简(jian)单，移动方(fang)便，不产生油烟，不污染环(huan)境，尤其(qi)在(zai)要求较(jiao)高(gao)的实验(yan)室(shi)使用(yong)较(jiao)好。也是实验(yan)室(shi)最(zui)常备的设备之一。

因此在选购无油真(zhen)(zhen)空(kong)泵时要(yao)(yao)先确定要(yao)(yao)求工(gong)作的(de)真(zhen)(zhen)空(kong)度，如(ru)果需(xu)求的(de)真(zhen)(zhen)度高，而选的(de)真(zhen)(zhen)空(kong)泵就要(yao)(yao)高于需(xu)求的(de)真(zhen)(zhen)空(kong)度，否则(ze)达不到抽(chou)真(zhen)(zhen)空(kong)的(de)要(yao)(yao)求，就会(hui)(hui)达不到工(gong)作要(yao)(yao)求。其次是无油真(zhen)(zhen)空(kong)泵抽(chou)气速率，选型时就要(yao)(yao)稍大于所需(xu)求的(de)抽(chou)气速率，这样就能更好的(de)满足(zu)(zu)需(xu)要(yao)(yao)。最后看抽(chou)取(qu)的(de)气体有(you)无腐(fu)蚀(shi)性(xing)，有(you)腐(fu)蚀(shi)的(de)气体会(hui)(hui)腐(fu)蚀(shi)泵，必须要(yao)(yao)用(yong)特殊(shu)的(de)材质才能满足(zu)(zu)需(xu)求。