无油式真空泵是(shi)一种旋(xuan)转式(shi)(shi)变(bian)容(rong)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)须有(you)前级泵(beng)(beng)配合方可使用在较(jiao)宽的压力范围内有(you)较(jiao)大的抽速对被抽除气体中含有(you)灰尘和水(shui)(shui)(shui)(shui)蒸汽不敏感广泛用于(yu)冶金、化(hua)工、食品、电子镀膜等行(xing)业。主要有(you)WLW系列立式(shi)(shi)无(wu)油(you)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)、W型(xing)(xing)(xing)往复式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)、2X,2XZ型(xing)(xing)(xing)旋(xuan)片(pian)式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)、ZJ，ZJH型(xing)(xing)(xing)罗茨(ci)(ci)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)（ZJH型(xing)(xing)(xing)为专(zhuan)利产真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)品）、2SK、SK型(xing)(xing)(xing)水(shui)(shui)(shui)(shui)环(huan)式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)、2BV、2BA型(xing)(xing)(xing)水(shui)(shui)(shui)(shui)环(huan)式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)、H、2H型(xing)(xing)(xing)滑(hua)阀真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)、TLZ型(xing)(xing)(xing)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)、SL型(xing)(xing)(xing)罗茨(ci)(ci)鼓风机(ji)(ji)、JZJHX型(xing)(xing)(xing)罗茨(ci)(ci)旋(xuan)片(pian)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)组、JZJHS型(xing)(xing)(xing)罗茨(ci)(ci)水(shui)(shui)(shui)(shui)环(huan)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)组、JZJHWLW型(xing)(xing)(xing)立式(shi)(shi)无(wu)油(you)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)组、JZJP型(xing)(xing)(xing)罗茨(ci)(ci)水(shui)(shui)(shui)(shui)喷射(she)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)组、JZJHBA型(xing)(xing)(xing)罗茨(ci)(ci)水(shui)(shui)(shui)(shui)环(huan)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)组、RPP型(xing)(xing)(xing)水(shui)(shui)(shui)(shui)喷射(she)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)、JZJH2H型(xing)(xing)(xing)罗茨(ci)(ci)滑(hua)阀式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)组等型(xing)(xing)(xing)号。　　

　　工作原理：　

　　1.首先应该充分(fen)了解被抽气(qi)体成分(fen)。如(ru)气(qi)体中含(han)不含(han)可凝蒸(zheng)气(qi)、有(you)(you)无颗粒灰(hui)尘、有(you)(you)无腐(fu)(fu)蚀(shi)性、爆(bao)炸性等(deng)(deng)。如(ru)果气(qi)体中含(han)有(you)(you)蒸(zheng)气(qi)、颗粒、及(ji)腐(fu)(fu)蚀(shi)性气(qi)体，应该考虑在(zai)泵的进气(qi)口(kou)管路上(shang)安装辅助设备，如(ru)冷凝器(qi)、除尘器(qi)等(deng)(deng)。如(ru)抽取(qu)气(qi)体还有(you)(you)腐(fu)(fu)蚀(shi)性，则须选(xuan)用材质(zhi)。若抽取(qu)的气(qi)体具(ju)有(you)(you)爆(bao)炸性，则应该选(xuan)择水环(huan)式真空泵并且配(pei)防爆(bao)电机，因为水环(huan)式真空泵整个工作过程是(shi)等(deng)(deng)温的。　　

　　2.真(zhen)空设备或者零(ling)部件(jian)对油污(wu)染(ran)的要求(qiu)。若(ruo)(ruo)设备严格(ge)要求(qiu)无(wu)油时，应该选各种无(wu)油泵(beng)，如：水环式真(zhen)空泵(beng)、分子(zi)筛吸附泵(beng)、溅(jian)射离子(zi)泵(beng)、低温泵(beng)等(deng)(deng)。若(ruo)(ruo)要求(qiu)不严格(ge)，可以选择有(you)油泵(beng)，并且加上一些(xie)防油污(wu)染(ran)措(cuo)施，如加冷阱(jing)(jing)、障板(ban)、挡油阱(jing)(jing)等(deng)(deng)，也能达到清洁(jie)真(zhen)空要求(qiu)。　　

　　3.真(zhen)空泵(beng)排出来的(de)油蒸气对(dui)环境的(de)影响如何。如果环境不允(yun)许有污(wu)染，可以(yi)选无油真(zhen)空泵(beng)如水环式(shi)真(zhen)空泵(beng)，或者(zhe)把油蒸气排到(dao)室(shi)外。　　

　　4.如(ru)有多台大型水环式真空泵同时(shi)工(gong)作(zuo)，循环液应该进行(xing)冷(leng)却，否则影(ying)响真空度(du)。冷(leng)却装置可以配备冷(leng)却塔，同时(shi)须配增压泵对(dui)管路加(jia)压。　

　　5.真(zhen)(zhen)(zhen)空(kong)泵(beng)的工(gong)作压强应(ying)该(gai)满足真(zhen)(zhen)(zhen)空(kong)设(she)备的极限真(zhen)(zhen)(zhen)空(kong)及工(gong)作压强要求。通常选择真(zhen)(zhen)(zhen)空(kong)泵(beng)泵(beng)的真(zhen)(zhen)(zhen)空(kong)度要高于真(zhen)(zhen)(zhen)空(kong)设(she)备真(zhen)(zhen)(zhen)空(kong)度半(ban)个到一个数量级。　

　　6.真空泵在其工作压(ya)强下，应能排走真空设备工艺过程中(zhong)产(chan)生的(de)全(quan)部(bu)气体(ti)量。

它具(ju)有(you)结构简单、操作容易、维护(hu)方便(bian)、不会污染环(huan)境等优点。无(wu)油真空泵耐用性好，是抽真空，压缩，两用真空泵，是一种应(ying)用范围非常(chang)广泛获得真空的(de)基本(ben)设备(bei)。

无油真空泵(beng)与油泵(beng)相比真空度(du)低，抽气量小，但体积小巧，易于安装，维护简单(dan)，移动(dong)方便，不(bu)(bu)产生油烟，不(bu)(bu)污染(ran)环境，尤其在要求较高的实(shi)验室(shi)使用较好(hao)。也是(shi)实(shi)验室(shi)最常(chang)备的设备之(zhi)一。

因此在选购无油真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)时(shi)要(yao)先(xian)确定要(yao)求工(gong)作的(de)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)度(du)(du)，如果需求的(de)真(zhen)(zhen)(zhen)(zhen)度(du)(du)高(gao)，而选的(de)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)就要(yao)高(gao)于(yu)需求的(de)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)度(du)(du)，否(fou)则达不到(dao)抽真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)的(de)要(yao)求，就会达不到(dao)工(gong)作要(yao)求。其次是无油真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)抽气速率(lv)，选型(xing)时(shi)就要(yao)稍大于(yu)所需求的(de)抽气速率(lv)，这(zhei)样就能更好的(de)满足需要(yao)。最后看(kan)抽取的(de)气体(ti)有无腐(fu)蚀性，有腐(fu)蚀的(de)气体(ti)会腐(fu)蚀泵(beng)，必须要(yao)用特(te)殊的(de)材质才能满足需求。