无油式真空泵是一种(zhong)旋(xuan)(xuan)转式(shi)变容真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)须有(you)前级(ji)泵(beng)(beng)(beng)配合(he)方可使用(yong)在较宽的压力(li)范围(wei)内有(you)较大的抽速对被(bei)抽除气体中含有(you)灰(hui)尘(chen)和(he)水(shui)(shui)(shui)蒸(zheng)汽(qi)不(bu)敏感广(guang)泛用(yong)于冶金、化工(gong)、食品(pin)、电子(zi)镀膜等(deng)行(xing)业。主要有(you)WLW系列立(li)式(shi)无(wu)油(you)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、W型(xing)(xing)(xing)(xing)(xing)(xing)(xing)往复式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2X,2XZ型(xing)(xing)(xing)(xing)(xing)(xing)(xing)旋(xuan)(xuan)片式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、ZJ，ZJH型(xing)(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)(ci)(ci)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)（ZJH型(xing)(xing)(xing)(xing)(xing)(xing)(xing)为专利产真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)品(pin)）、2SK、SK型(xing)(xing)(xing)(xing)(xing)(xing)(xing)水(shui)(shui)(shui)环(huan)式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2BV、2BA型(xing)(xing)(xing)(xing)(xing)(xing)(xing)水(shui)(shui)(shui)环(huan)式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、H、2H型(xing)(xing)(xing)(xing)(xing)(xing)(xing)滑阀(fa)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、TLZ型(xing)(xing)(xing)(xing)(xing)(xing)(xing)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、SL型(xing)(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)(ci)(ci)鼓(gu)风机、JZJHX型(xing)(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)(ci)(ci)旋(xuan)(xuan)片真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机组(zu)、JZJHS型(xing)(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)(ci)(ci)水(shui)(shui)(shui)环(huan)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机组(zu)、JZJHWLW型(xing)(xing)(xing)(xing)(xing)(xing)(xing)立(li)式(shi)无(wu)油(you)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机组(zu)、JZJP型(xing)(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)(ci)(ci)水(shui)(shui)(shui)喷(pen)射(she)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机组(zu)、JZJHBA型(xing)(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)(ci)(ci)水(shui)(shui)(shui)环(huan)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机组(zu)、RPP型(xing)(xing)(xing)(xing)(xing)(xing)(xing)水(shui)(shui)(shui)喷(pen)射(she)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、JZJH2H型(xing)(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)(ci)(ci)滑阀(fa)式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机组(zu)等(deng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)号(hao)。　　

　　工作原理：　

　　1.首先应该(gai)(gai)充分了(le)解被(bei)抽气(qi)(qi)体(ti)成分。如(ru)气(qi)(qi)体(ti)中含不含可(ke)凝蒸(zheng)气(qi)(qi)、有(you)无颗粒(li)灰(hui)尘、有(you)无腐(fu)蚀性(xing)(xing)、爆(bao)炸(zha)(zha)性(xing)(xing)等。如(ru)果气(qi)(qi)体(ti)中含有(you)蒸(zheng)气(qi)(qi)、颗粒(li)、及腐(fu)蚀性(xing)(xing)气(qi)(qi)体(ti)，应该(gai)(gai)考虑在泵(beng)的(de)进气(qi)(qi)口(kou)管路上安装辅(fu)助(zhu)设备，如(ru)冷(leng)凝器、除尘器等。如(ru)抽取(qu)气(qi)(qi)体(ti)还有(you)腐(fu)蚀性(xing)(xing)，则须(xu)选(xuan)(xuan)用材质。若抽取(qu)的(de)气(qi)(qi)体(ti)具有(you)爆(bao)炸(zha)(zha)性(xing)(xing)，则应该(gai)(gai)选(xuan)(xuan)择水环式真(zhen)空(kong)泵(beng)并且配防爆(bao)电机，因为水环式真(zhen)空(kong)泵(beng)整个工作(zuo)过(guo)程是(shi)等温(wen)的(de)。　　

　　2.真(zhen)空(kong)设备或者零部件对油(you)污(wu)染的要(yao)求(qiu)。若设备严格要(yao)求(qiu)无油(you)时，应(ying)该选各(ge)种无油(you)泵(beng)，如：水(shui)环式真(zhen)空(kong)泵(beng)、分(fen)子(zi)筛吸附泵(beng)、溅射(she)离子(zi)泵(beng)、低(di)温泵(beng)等。若要(yao)求(qiu)不严格，可以选择(ze)有油(you)泵(beng)，并(bing)且加(jia)上一些防油(you)污(wu)染措(cuo)施，如加(jia)冷阱、障板、挡油(you)阱等，也能(neng)达到清(qing)洁真(zhen)空(kong)要(yao)求(qiu)。　　

　　3.真空(kong)(kong)(kong)泵(beng)排出(chu)来的油蒸(zheng)气(qi)对环境的影响如(ru)何。如(ru)果环境不允许有(you)污染，可以选无(wu)油真空(kong)(kong)(kong)泵(beng)如(ru)水环式真空(kong)(kong)(kong)泵(beng)，或者(zhe)把油蒸(zheng)气(qi)排到(dao)室外。　　

　　4.如有多台(tai)大型水环式真(zhen)(zhen)空泵(beng)同时工作，循环液应该进行冷却，否则影响真(zhen)(zhen)空度。冷却装置可以配(pei)备冷却塔(ta)，同时须(xu)配(pei)增压泵(beng)对管(guan)路加压。　

　　5.真空(kong)(kong)(kong)泵(beng)的(de)工(gong)作压强应该满(man)足真空(kong)(kong)(kong)设备的(de)极限(xian)真空(kong)(kong)(kong)及工(gong)作压强要求(qiu)。通常(chang)选择真空(kong)(kong)(kong)泵(beng)泵(beng)的(de)真空(kong)(kong)(kong)度要高于真空(kong)(kong)(kong)设备真空(kong)(kong)(kong)度半个到一(yi)个数量级。　

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

它具(ju)有结(jie)构简(jian)单、操作容易、维护方(fang)便、不会污(wu)染环境(jing)等优点。无油真空(kong)泵(beng)(beng)耐(nai)用性好(hao)，是(shi)抽真空(kong)，压缩(suo)，两(liang)用真空(kong)泵(beng)(beng)，是(shi)一(yi)种应用范围(wei)非(fei)常广泛获得(de)真空(kong)的基本设备。

无油(you)真(zhen)空泵与(yu)油(you)泵相比真(zhen)空度(du)低，抽气量小，但体积(ji)小巧(qiao)，易于(yu)安装，维护简(jian)单，移动方便(bian)，不产生油(you)烟，不污染(ran)环(huan)境，尤其(qi)在要求较高的实验室(shi)使(shi)用(yong)较好(hao)。也是实验室(shi)最常备的设备之一。

因此(ci)在选购无(wu)油真(zhen)空(kong)(kong)泵时要(yao)(yao)先确定要(yao)(yao)求(qiu)工作的(de)(de)(de)(de)真(zhen)空(kong)(kong)度，如果需(xu)(xu)(xu)求(qiu)的(de)(de)(de)(de)真(zhen)度高(gao)，而选的(de)(de)(de)(de)真(zhen)空(kong)(kong)泵就(jiu)要(yao)(yao)高(gao)于(yu)需(xu)(xu)(xu)求(qiu)的(de)(de)(de)(de)真(zhen)空(kong)(kong)度，否则(ze)达不到抽真(zhen)空(kong)(kong)的(de)(de)(de)(de)要(yao)(yao)求(qiu)，就(jiu)会达不到工作要(yao)(yao)求(qiu)。其次是(shi)无(wu)油真(zhen)空(kong)(kong)泵抽气(qi)(qi)速率，选型时就(jiu)要(yao)(yao)稍大于(yu)所需(xu)(xu)(xu)求(qiu)的(de)(de)(de)(de)抽气(qi)(qi)速率，这样就(jiu)能更好的(de)(de)(de)(de)满(man)足(zu)(zu)需(xu)(xu)(xu)要(yao)(yao)。最后看抽取的(de)(de)(de)(de)气(qi)(qi)体有无(wu)腐蚀(shi)性，有腐蚀(shi)的(de)(de)(de)(de)气(qi)(qi)体会腐蚀(shi)泵，必须(xu)要(yao)(yao)用特殊的(de)(de)(de)(de)材质才能满(man)足(zu)(zu)需(xu)(xu)(xu)求(qiu)。