无油式真空泵是一种(zhong)旋转式变(bian)容(rong)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)须有前级(ji)泵(beng)(beng)(beng)配(pei)合方可(ke)使用(yong)在较宽的(de)压(ya)力(li)范围内有较大的(de)抽速(su)对被抽除气体(ti)中含(han)有灰尘(chen)和水蒸汽不敏感广泛用(yong)于冶金、化工、食品、电子镀膜(mo)等行业。主要有WLW系列立式无油真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、W型(xing)(xing)(xing)(xing)(xing)往(wang)复式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2X,2XZ型(xing)(xing)(xing)(xing)(xing)旋片式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、ZJ，ZJH型(xing)(xing)(xing)(xing)(xing)罗(luo)茨(ci)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)（ZJH型(xing)(xing)(xing)(xing)(xing)为专利产(chan)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)品）、2SK、SK型(xing)(xing)(xing)(xing)(xing)水环式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2BV、2BA型(xing)(xing)(xing)(xing)(xing)水环式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、H、2H型(xing)(xing)(xing)(xing)(xing)滑阀真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、TLZ型(xing)(xing)(xing)(xing)(xing)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、SL型(xing)(xing)(xing)(xing)(xing)罗(luo)茨(ci)鼓风机(ji)、JZJHX型(xing)(xing)(xing)(xing)(xing)罗(luo)茨(ci)旋片真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)(zu)、JZJHS型(xing)(xing)(xing)(xing)(xing)罗(luo)茨(ci)水环真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)(zu)、JZJHWLW型(xing)(xing)(xing)(xing)(xing)立式无油真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)(zu)、JZJP型(xing)(xing)(xing)(xing)(xing)罗(luo)茨(ci)水喷(pen)射真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)(zu)、JZJHBA型(xing)(xing)(xing)(xing)(xing)罗(luo)茨(ci)水环真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)(zu)、RPP型(xing)(xing)(xing)(xing)(xing)水喷(pen)射真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、JZJH2H型(xing)(xing)(xing)(xing)(xing)罗(luo)茨(ci)滑阀式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)(zu)等型(xing)(xing)(xing)(xing)(xing)号。　　

　　工作原理：　

　　1.首先应(ying)(ying)该(gai)充分了解被(bei)抽(chou)(chou)气(qi)(qi)体(ti)(ti)成分。如(ru)(ru)气(qi)(qi)体(ti)(ti)中含(han)不含(han)可凝(ning)蒸(zheng)气(qi)(qi)、有(you)无(wu)颗(ke)粒灰尘、有(you)无(wu)腐(fu)蚀性(xing)、爆炸性(xing)等。如(ru)(ru)果气(qi)(qi)体(ti)(ti)中含(han)有(you)蒸(zheng)气(qi)(qi)、颗(ke)粒、及腐(fu)蚀性(xing)气(qi)(qi)体(ti)(ti)，应(ying)(ying)该(gai)考虑在泵的进气(qi)(qi)口管路(lu)上(shang)安装辅助设备，如(ru)(ru)冷(leng)凝(ning)器(qi)、除尘器(qi)等。如(ru)(ru)抽(chou)(chou)取气(qi)(qi)体(ti)(ti)还有(you)腐(fu)蚀性(xing)，则(ze)须选(xuan)(xuan)用材(cai)质。若抽(chou)(chou)取的气(qi)(qi)体(ti)(ti)具(ju)有(you)爆炸性(xing)，则(ze)应(ying)(ying)该(gai)选(xuan)(xuan)择水环(huan)式真空泵并且配防爆电机，因为水环(huan)式真空泵整个工作过程是等温的。　　

　　2.真空(kong)设备或者零部件对(dui)油(you)(you)污染(ran)的要(yao)求。若设备严(yan)(yan)格要(yao)求无油(you)(you)时(shi)，应该选各(ge)种无油(you)(you)泵(beng)，如：水(shui)环式真空(kong)泵(beng)、分子筛(shai)吸附泵(beng)、溅(jian)射离子泵(beng)、低温泵(beng)等。若要(yao)求不严(yan)(yan)格，可以选择有油(you)(you)泵(beng)，并(bing)且加(jia)上(shang)一些防油(you)(you)污染(ran)措(cuo)施(shi)，如加(jia)冷阱、障(zhang)板、挡油(you)(you)阱等，也能(neng)达到清(qing)洁真空(kong)要(yao)求。　　

　　3.真空泵排出(chu)来的油(you)蒸(zheng)(zheng)气对环(huan)境的影响如何。如果环(huan)境不允许有污染，可以选无(wu)油(you)真空泵如水环(huan)式真空泵，或者(zhe)把油(you)蒸(zheng)(zheng)气排到室外(wai)。　　

　　4.如有多台大型水环式真(zhen)空泵(beng)同(tong)时(shi)工作(zuo)，循(xun)环液应该进(jin)行冷(leng)却(que)(que)，否则(ze)影响(xiang)真(zhen)空度(du)。冷(leng)却(que)(que)装(zhuang)置可以配备冷(leng)却(que)(que)塔，同(tong)时(shi)须配增压泵(beng)对管路(lu)加压。　

　　5.真(zhen)(zhen)空(kong)(kong)(kong)泵(beng)的工作压(ya)强(qiang)应该满(man)足真(zhen)(zhen)空(kong)(kong)(kong)设(she)备的极限真(zhen)(zhen)空(kong)(kong)(kong)及工作压(ya)强(qiang)要(yao)求(qiu)。通(tong)常选择(ze)真(zhen)(zhen)空(kong)(kong)(kong)泵(beng)泵(beng)的真(zhen)(zhen)空(kong)(kong)(kong)度要(yao)高于真(zhen)(zhen)空(kong)(kong)(kong)设(she)备真(zhen)(zhen)空(kong)(kong)(kong)度半个到(dao)一个数(shu)量级。　

　　6.真空泵在其工(gong)作压(ya)强下，应能排走(zou)真空设备(bei)工(gong)艺过程(cheng)中(zhong)产生的全部气(qi)体量。

它(ta)具有(you)结构简单、操作容易、维护方便、不(bu)会污(wu)染环境等优点。无油真(zhen)(zhen)(zhen)空泵(beng)耐用(yong)性(xing)好，是抽真(zhen)(zhen)(zhen)空，压(ya)缩(suo)，两用(yong)真(zhen)(zhen)(zhen)空泵(beng)，是一种应用(yong)范围非常广泛获得真(zhen)(zhen)(zhen)空的(de)基本设(she)备。

无油真(zhen)(zhen)空泵与油泵相(xiang)比真(zhen)(zhen)空度低，抽气量(liang)小，但体(ti)积小巧，易于安装，维护简(jian)单，移(yi)动方便，不(bu)产生油烟，不(bu)污染环(huan)境，尤其在要(yao)求较高的(de)(de)实(shi)(shi)验室(shi)使用较好。也是实(shi)(shi)验室(shi)最常备的(de)(de)设备之一。

因(yin)此在选(xuan)购无(wu)油真(zhen)(zhen)(zhen)(zhen)空泵(beng)(beng)时(shi)要(yao)(yao)先(xian)确定要(yao)(yao)求(qiu)(qiu)工作(zuo)的真(zhen)(zhen)(zhen)(zhen)空度，如果需求(qiu)(qiu)的真(zhen)(zhen)(zhen)(zhen)度高(gao)，而(er)选(xuan)的真(zhen)(zhen)(zhen)(zhen)空泵(beng)(beng)就(jiu)要(yao)(yao)高(gao)于需求(qiu)(qiu)的真(zhen)(zhen)(zhen)(zhen)空度，否则达不(bu)到抽(chou)真(zhen)(zhen)(zhen)(zhen)空的要(yao)(yao)求(qiu)(qiu)，就(jiu)会(hui)达不(bu)到工作(zuo)要(yao)(yao)求(qiu)(qiu)。其次是(shi)无(wu)油真(zhen)(zhen)(zhen)(zhen)空泵(beng)(beng)抽(chou)气(qi)(qi)速率(lv)，选(xuan)型时(shi)就(jiu)要(yao)(yao)稍大于所需求(qiu)(qiu)的抽(chou)气(qi)(qi)速率(lv)，这(zhei)样就(jiu)能更好(hao)的满足(zu)(zu)需要(yao)(yao)。最后看(kan)抽(chou)取的气(qi)(qi)体有(you)无(wu)腐(fu)蚀(shi)性，有(you)腐(fu)蚀(shi)的气(qi)(qi)体会(hui)腐(fu)蚀(shi)泵(beng)(beng)，必须要(yao)(yao)用特(te)殊的材质才(cai)能满足(zu)(zu)需求(qiu)(qiu)。