无油式真空泵是一种旋转式(shi)变容真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)须有(you)前级泵(beng)(beng)配合方可使用(yong)在较宽的压力范围内有(you)较大的抽(chou)速对(dui)被抽(chou)除气体(ti)中含有(you)灰尘和水(shui)(shui)(shui)蒸汽(qi)不敏感广泛用(yong)于冶金(jin)、化工、食品(pin)、电子(zi)镀膜等行(xing)业。主要有(you)WLW系列(lie)立式(shi)无(wu)油真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、W型(xing)(xing)(xing)(xing)往复式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、2X,2XZ型(xing)(xing)(xing)(xing)旋片(pian)式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、ZJ，ZJH型(xing)(xing)(xing)(xing)罗(luo)茨(ci)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)（ZJH型(xing)(xing)(xing)(xing)为专利产(chan)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)品(pin)）、2SK、SK型(xing)(xing)(xing)(xing)水(shui)(shui)(shui)环(huan)式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、2BV、2BA型(xing)(xing)(xing)(xing)水(shui)(shui)(shui)环(huan)式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、H、2H型(xing)(xing)(xing)(xing)滑阀真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、TLZ型(xing)(xing)(xing)(xing)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、SL型(xing)(xing)(xing)(xing)罗(luo)茨(ci)鼓风(feng)机(ji)(ji)、JZJHX型(xing)(xing)(xing)(xing)罗(luo)茨(ci)旋片(pian)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)、JZJHS型(xing)(xing)(xing)(xing)罗(luo)茨(ci)水(shui)(shui)(shui)环(huan)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)、JZJHWLW型(xing)(xing)(xing)(xing)立式(shi)无(wu)油真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)、JZJP型(xing)(xing)(xing)(xing)罗(luo)茨(ci)水(shui)(shui)(shui)喷(pen)射(she)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)、JZJHBA型(xing)(xing)(xing)(xing)罗(luo)茨(ci)水(shui)(shui)(shui)环(huan)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)、RPP型(xing)(xing)(xing)(xing)水(shui)(shui)(shui)喷(pen)射(she)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、JZJH2H型(xing)(xing)(xing)(xing)罗(luo)茨(ci)滑阀式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)等型(xing)(xing)(xing)(xing)号。　　

　　工作原理：　

　　1.首先应(ying)该充分(fen)(fen)了解(jie)被抽气(qi)体(ti)成分(fen)(fen)。如气(qi)体(ti)中含不含可凝蒸(zheng)气(qi)、有无颗粒灰尘(chen)、有无腐(fu)(fu)蚀性(xing)(xing)、爆炸性(xing)(xing)等。如果气(qi)体(ti)中含有蒸(zheng)气(qi)、颗粒、及腐(fu)(fu)蚀性(xing)(xing)气(qi)体(ti)，应(ying)该考虑在泵(beng)的进气(qi)口管路上安装辅助设(she)备，如冷凝器(qi)、除尘(chen)器(qi)等。如抽取(qu)气(qi)体(ti)还有腐(fu)(fu)蚀性(xing)(xing)，则须选(xuan)用(yong)材质。若抽取(qu)的气(qi)体(ti)具有爆炸性(xing)(xing)，则应(ying)该选(xuan)择水环式(shi)真空(kong)泵(beng)并且配(pei)防爆电机，因为水环式(shi)真空(kong)泵(beng)整个工作过程(cheng)是等温的。　　

　　2.真(zhen)空设备或者零部件对油(you)(you)污(wu)染的(de)要求(qiu)。若设备严格要求(qiu)无油(you)(you)时，应该选各(ge)种(zhong)无油(you)(you)泵，如：水环式(shi)真(zhen)空泵、分(fen)子(zi)筛吸附泵、溅射离(li)子(zi)泵、低温(wen)泵等(deng)(deng)。若要求(qiu)不严格，可以选择有油(you)(you)泵，并(bing)且(qie)加上一些(xie)防油(you)(you)污(wu)染措施，如加冷阱、障(zhang)板、挡(dang)油(you)(you)阱等(deng)(deng)，也能达到(dao)清洁真(zhen)空要求(qiu)。　　

　　3.真空(kong)(kong)泵(beng)排出来的油蒸气对环境(jing)的影响如何。如果环境(jing)不允许有污(wu)染，可以选无油真空(kong)(kong)泵(beng)如水环式真空(kong)(kong)泵(beng)，或者把油蒸气排到室外。　　

　　4.如(ru)有(you)多(duo)台大型水(shui)环式真空泵同时工(gong)作，循(xun)环液应该进行冷(leng)却，否则影(ying)响真空度。冷(leng)却装置可(ke)以(yi)配备冷(leng)却塔，同时须(xu)配增压(ya)泵对(dui)管路(lu)加压(ya)。　

　　5.真空(kong)(kong)泵的(de)(de)工作(zuo)压强(qiang)应该满足真空(kong)(kong)设备(bei)的(de)(de)极限(xian)真空(kong)(kong)及工作(zuo)压强(qiang)要(yao)求(qiu)。通常选择真空(kong)(kong)泵泵的(de)(de)真空(kong)(kong)度要(yao)高(gao)于(yu)真空(kong)(kong)设备(bei)真空(kong)(kong)度半个到(dao)一个数量级。　

　　6.真空泵在其工作压强下，应能排走真空设备(bei)工艺过程中(zhong)产生的全部气体量。

它(ta)具有结构简单、操作容易、维护方便(bian)、不会污染环境等优点(dian)。无油真(zhen)空泵耐(nai)用(yong)性(xing)好，是抽真(zhen)空，压缩，两用(yong)真(zhen)空泵，是一种应用(yong)范围非常广泛获得真(zhen)空的基本设(she)备。

无油真空泵与油泵相比真空度低，抽气(qi)量(liang)小，但体积小巧，易于安装，维护简单(dan)，移动方便，不(bu)产(chan)生油烟，不(bu)污染环境，尤其在要(yao)求较高的(de)实验(yan)室使用较好。也(ye)是实验(yan)室最常备的(de)设(she)备之一。

因此在选购(gou)无油真(zhen)(zhen)空(kong)泵时要先确定(ding)要求(qiu)工(gong)作的(de)(de)(de)(de)(de)(de)(de)真(zhen)(zhen)空(kong)度，如(ru)果需(xu)(xu)(xu)求(qiu)的(de)(de)(de)(de)(de)(de)(de)真(zhen)(zhen)度高(gao)，而选的(de)(de)(de)(de)(de)(de)(de)真(zhen)(zhen)空(kong)泵就要高(gao)于需(xu)(xu)(xu)求(qiu)的(de)(de)(de)(de)(de)(de)(de)真(zhen)(zhen)空(kong)度，否则达不到(dao)抽(chou)真(zhen)(zhen)空(kong)的(de)(de)(de)(de)(de)(de)(de)要求(qiu)，就会达不到(dao)工(gong)作要求(qiu)。其次是无油真(zhen)(zhen)空(kong)泵抽(chou)气(qi)速率，选型时就要稍(shao)大于所(suo)需(xu)(xu)(xu)求(qiu)的(de)(de)(de)(de)(de)(de)(de)抽(chou)气(qi)速率，这样就能更(geng)好(hao)的(de)(de)(de)(de)(de)(de)(de)满足需(xu)(xu)(xu)要。最后看抽(chou)取的(de)(de)(de)(de)(de)(de)(de)气(qi)体有无腐(fu)蚀(shi)性(xing)，有腐(fu)蚀(shi)的(de)(de)(de)(de)(de)(de)(de)气(qi)体会腐(fu)蚀(shi)泵，必须(xu)要用特殊的(de)(de)(de)(de)(de)(de)(de)材质才能满足需(xu)(xu)(xu)求(qiu)。