无油式真空泵是一(yi)种旋转式(shi)(shi)(shi)变容(rong)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)须有(you)前级泵(beng)(beng)(beng)配合方可(ke)使用在较(jiao)(jiao)宽(kuan)的压力范围内有(you)较(jiao)(jiao)大(da)的抽速对被抽除气体中(zhong)含有(you)灰尘和水(shui)(shui)蒸汽(qi)不敏感广(guang)泛用于冶金、化(hua)工(gong)、食品(pin)、电子镀膜等行业。主要有(you)WLW系列立式(shi)(shi)(shi)无油真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)、W型(xing)(xing)(xing)往复式(shi)(shi)(shi)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)、2X,2XZ型(xing)(xing)(xing)旋片式(shi)(shi)(shi)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)、ZJ，ZJH型(xing)(xing)(xing)罗(luo)(luo)茨(ci)(ci)(ci)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)（ZJH型(xing)(xing)(xing)为专利产真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)品(pin)）、2SK、SK型(xing)(xing)(xing)水(shui)(shui)环式(shi)(shi)(shi)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)、2BV、2BA型(xing)(xing)(xing)水(shui)(shui)环式(shi)(shi)(shi)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)、H、2H型(xing)(xing)(xing)滑阀真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)、TLZ型(xing)(xing)(xing)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)、SL型(xing)(xing)(xing)罗(luo)(luo)茨(ci)(ci)(ci)鼓风机(ji)(ji)、JZJHX型(xing)(xing)(xing)罗(luo)(luo)茨(ci)(ci)(ci)旋片真(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)组(zu)、JZJHS型(xing)(xing)(xing)罗(luo)(luo)茨(ci)(ci)(ci)水(shui)(shui)环真(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)组(zu)、JZJHWLW型(xing)(xing)(xing)立式(shi)(shi)(shi)无油真(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)组(zu)、JZJP型(xing)(xing)(xing)罗(luo)(luo)茨(ci)(ci)(ci)水(shui)(shui)喷射(she)真(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)组(zu)、JZJHBA型(xing)(xing)(xing)罗(luo)(luo)茨(ci)(ci)(ci)水(shui)(shui)环真(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)组(zu)、RPP型(xing)(xing)(xing)水(shui)(shui)喷射(she)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)、JZJH2H型(xing)(xing)(xing)罗(luo)(luo)茨(ci)(ci)(ci)滑阀式(shi)(shi)(shi)真(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)组(zu)等型(xing)(xing)(xing)号。　　

　　工作原理：　

　　1.首先(xian)应该(gai)充分(fen)了解被抽气(qi)体成分(fen)。如气(qi)体中含(han)(han)不含(han)(han)可(ke)凝(ning)蒸气(qi)、有(you)无颗(ke)粒(li)灰(hui)尘、有(you)无腐(fu)蚀性(xing)、爆炸(zha)性(xing)等(deng)(deng)。如果气(qi)体中含(han)(han)有(you)蒸气(qi)、颗(ke)粒(li)、及腐(fu)蚀性(xing)气(qi)体，应该(gai)考(kao)虑在泵(beng)的进气(qi)口(kou)管路上安装(zhuang)辅(fu)助设备，如冷凝(ning)器(qi)、除尘器(qi)等(deng)(deng)。如抽取气(qi)体还有(you)腐(fu)蚀性(xing)，则须选用材质(zhi)。若(ruo)抽取的气(qi)体具(ju)有(you)爆炸(zha)性(xing)，则应该(gai)选择水(shui)环式(shi)真(zhen)空泵(beng)并且配防爆电机，因为水(shui)环式(shi)真(zhen)空泵(beng)整(zheng)个工作过(guo)程是等(deng)(deng)温的。　　

　　2.真空设备(bei)或者(zhe)零部件对油(you)(you)污染(ran)的要求(qiu)。若设备(bei)严(yan)格要求(qiu)无(wu)油(you)(you)时，应该选(xuan)各种(zhong)无(wu)油(you)(you)泵(beng)(beng)，如(ru)：水(shui)环(huan)式真空泵(beng)(beng)、分子筛吸(xi)附泵(beng)(beng)、溅射(she)离子泵(beng)(beng)、低温泵(beng)(beng)等。若要求(qiu)不(bu)严(yan)格，可以选(xuan)择有(you)油(you)(you)泵(beng)(beng)，并且(qie)加上一(yi)些防油(you)(you)污染(ran)措施，如(ru)加冷阱、障板、挡油(you)(you)阱等，也能达到清洁真空要求(qiu)。　　

　　3.真空泵排(pai)出来的(de)油蒸(zheng)气对环(huan)境的(de)影(ying)响如何。如果环(huan)境不允许有污染，可(ke)以选无(wu)油真空泵如水环(huan)式(shi)真空泵，或者把油蒸(zheng)气排(pai)到室外(wai)。　　

　　4.如(ru)有多台大(da)型水环式真空泵同时(shi)工作，循环液应该进行冷却(que)，否(fou)则影(ying)响真空度(du)。冷却(que)装置可以配备冷却(que)塔(ta)，同时(shi)须配增压(ya)泵对管路加压(ya)。　

　　5.真(zhen)空(kong)泵的(de)工(gong)(gong)作(zuo)压(ya)强(qiang)(qiang)应(ying)该满足真(zhen)空(kong)设(she)备(bei)的(de)极限(xian)真(zhen)空(kong)及工(gong)(gong)作(zuo)压(ya)强(qiang)(qiang)要求。通常选择真(zhen)空(kong)泵泵的(de)真(zhen)空(kong)度(du)要高于真(zhen)空(kong)设(she)备(bei)真(zhen)空(kong)度(du)半(ban)个到一个数量级。　

　　6.真空(kong)泵在(zai)其工作压(ya)强下，应(ying)能(neng)排走(zou)真空(kong)设备工艺过程(cheng)中产生的全部气体量。

它具有结构(gou)简(jian)单、操作容易、维护方便、不会污染环境(jing)等优点(dian)。无油(you)真(zhen)空泵耐用(yong)性好，是抽真(zhen)空，压缩，两(liang)用(yong)真(zhen)空泵，是一种(zhong)应用(yong)范(fan)围非常广泛获得真(zhen)空的基本设备。

无油真空泵与油泵相比真空度低，抽气量(liang)小，但体积(ji)小巧，易于安(an)装，维护简单，移动方便(bian)，不产生油烟，不污染环(huan)境(jing)，尤其在要求较高的(de)实(shi)验(yan)室使用较好。也是实(shi)验(yan)室最常备的(de)设备之一。

因(yin)此(ci)在选(xuan)购无油真(zhen)(zhen)(zhen)空(kong)(kong)泵时要(yao)(yao)先确(que)定要(yao)(yao)求(qiu)(qiu)(qiu)工(gong)作的(de)(de)(de)(de)真(zhen)(zhen)(zhen)空(kong)(kong)度，如果需(xu)求(qiu)(qiu)(qiu)的(de)(de)(de)(de)真(zhen)(zhen)(zhen)度高，而(er)选(xuan)的(de)(de)(de)(de)真(zhen)(zhen)(zhen)空(kong)(kong)泵就(jiu)要(yao)(yao)高于需(xu)求(qiu)(qiu)(qiu)的(de)(de)(de)(de)真(zhen)(zhen)(zhen)空(kong)(kong)度，否则(ze)达不到抽(chou)真(zhen)(zhen)(zhen)空(kong)(kong)的(de)(de)(de)(de)要(yao)(yao)求(qiu)(qiu)(qiu)，就(jiu)会(hui)达不到工(gong)作要(yao)(yao)求(qiu)(qiu)(qiu)。其次(ci)是无油真(zhen)(zhen)(zhen)空(kong)(kong)泵抽(chou)气速率，选(xuan)型时就(jiu)要(yao)(yao)稍大于所需(xu)求(qiu)(qiu)(qiu)的(de)(de)(de)(de)抽(chou)气速率，这样就(jiu)能更(geng)好的(de)(de)(de)(de)满足需(xu)要(yao)(yao)。最(zui)后看抽(chou)取的(de)(de)(de)(de)气体有(you)无腐蚀性，有(you)腐蚀的(de)(de)(de)(de)气体会(hui)腐蚀泵，必须(xu)要(yao)(yao)用(yong)特殊(shu)的(de)(de)(de)(de)材质才能满足需(xu)求(qiu)(qiu)(qiu)。