无油式真空泵是(shi)一(yi)种旋转式变容真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)须有前级泵(beng)(beng)(beng)配(pei)合方可使用(yong)在较(jiao)宽(kuan)的压力范围(wei)内有较(jiao)大(da)的抽速(su)对被抽除气体(ti)中含有灰尘和水(shui)(shui)(shui)蒸(zheng)汽不敏感广(guang)泛用(yong)于冶金、化工、食品、电子镀膜(mo)等行(xing)业。主要有WLW系列立式无(wu)油真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、W型(xing)(xing)(xing)(xing)往复(fu)式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2X,2XZ型(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)罗茨(ci)(ci)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)（ZJH型(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)水(shui)(shui)(shui)环式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2BV、2BA型(xing)(xing)(xing)(xing)水(shui)(shui)(shui)环式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、H、2H型(xing)(xing)(xing)(xing)滑阀(fa)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、TLZ型(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)罗茨(ci)(ci)鼓风机、JZJHX型(xing)(xing)(xing)(xing)罗茨(ci)(ci)旋片真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机组(zu)、JZJHS型(xing)(xing)(xing)(xing)罗茨(ci)(ci)水(shui)(shui)(shui)环真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机组(zu)、JZJHWLW型(xing)(xing)(xing)(xing)立式无(wu)油真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机组(zu)、JZJP型(xing)(xing)(xing)(xing)罗茨(ci)(ci)水(shui)(shui)(shui)喷射真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机组(zu)、JZJHBA型(xing)(xing)(xing)(xing)罗茨(ci)(ci)水(shui)(shui)(shui)环真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机组(zu)、RPP型(xing)(xing)(xing)(xing)水(shui)(shui)(shui)喷射真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、JZJH2H型(xing)(xing)(xing)(xing)罗茨(ci)(ci)滑阀(fa)式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机组(zu)等型(xing)(xing)(xing)(xing)号。　　

　　工作原理：　

　　1.首(shou)先应(ying)该充分了解被(bei)抽气(qi)(qi)体成(cheng)分。如气(qi)(qi)体中含不含可凝蒸(zheng)气(qi)(qi)、有(you)(you)无(wu)颗(ke)粒(li)灰尘、有(you)(you)无(wu)腐(fu)蚀性(xing)、爆(bao)炸性(xing)等。如果气(qi)(qi)体中含有(you)(you)蒸(zheng)气(qi)(qi)、颗(ke)粒(li)、及腐(fu)蚀性(xing)气(qi)(qi)体，应(ying)该考虑(lv)在泵(beng)(beng)的进(jin)气(qi)(qi)口管(guan)路上安装辅(fu)助设备，如冷凝器、除尘器等。如抽取气(qi)(qi)体还有(you)(you)腐(fu)蚀性(xing)，则(ze)须(xu)选用材质。若(ruo)抽取的气(qi)(qi)体具(ju)有(you)(you)爆(bao)炸性(xing)，则(ze)应(ying)该选择水环式真空泵(beng)(beng)并且配防爆(bao)电机(ji)，因为水环式真空泵(beng)(beng)整个工作过程是等温的。　　

　　2.真(zhen)空设备或者零部(bu)件(jian)对油(you)污染(ran)的(de)要(yao)求。若(ruo)设备严格(ge)要(yao)求无油(you)时，应该选各种无油(you)泵(beng)(beng)(beng)，如：水环式真(zhen)空泵(beng)(beng)(beng)、分子(zi)筛吸附(fu)泵(beng)(beng)(beng)、溅射(she)离子(zi)泵(beng)(beng)(beng)、低温泵(beng)(beng)(beng)等。若(ruo)要(yao)求不严格(ge)，可以选择有(you)油(you)泵(beng)(beng)(beng)，并且(qie)加上一些防油(you)污染(ran)措施，如加冷(leng)阱、障板、挡油(you)阱等，也能达(da)到清(qing)洁真(zhen)空要(yao)求。　　

　　3.真(zhen)空(kong)泵(beng)排(pai)出来(lai)的油(you)蒸(zheng)气对环境的影响(xiang)如(ru)何。如(ru)果环境不允许有(you)污染，可(ke)以(yi)选无油(you)真(zhen)空(kong)泵(beng)如(ru)水环式(shi)真(zhen)空(kong)泵(beng)，或(huo)者把(ba)油(you)蒸(zheng)气排(pai)到(dao)室外。　　

　　4.如有(you)多台(tai)大型水(shui)环(huan)式真(zhen)(zhen)空(kong)泵(beng)同(tong)时工作，循(xun)环(huan)液应(ying)该(gai)进行冷却(que)(que)(que)，否(fou)则(ze)影(ying)响(xiang)真(zhen)(zhen)空(kong)度。冷却(que)(que)(que)装置可以配(pei)备(bei)冷却(que)(que)(que)塔，同(tong)时须配(pei)增压泵(beng)对管路加压。　

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

　　6.真空泵在(zai)其工(gong)作压强下，应能(neng)排(pai)走真空设备工(gong)艺过程中产生的全部气(qi)体量。

它具(ju)有结构简单、操作容易、维护方便、不会污染环境等优点(dian)。无油真(zhen)空(kong)(kong)(kong)泵耐(nai)用(yong)性好，是(shi)抽真(zhen)空(kong)(kong)(kong)，压缩(suo)，两用(yong)真(zhen)空(kong)(kong)(kong)泵，是(shi)一种应(ying)用(yong)范围非常广(guang)泛获(huo)得真(zhen)空(kong)(kong)(kong)的(de)基本设备。

无油(you)真(zhen)空(kong)泵(beng)与油(you)泵(beng)相比真(zhen)空(kong)度低(di)，抽气量小(xiao)，但体(ti)积(ji)小(xiao)巧，易于安装，维护简(jian)单(dan)，移动方便，不(bu)(bu)产生(sheng)油(you)烟(yan)，不(bu)(bu)污染(ran)环境，尤其在要求(qiu)较(jiao)高(gao)的实验室使用较(jiao)好。也是(shi)实验室最常备(bei)的设备(bei)之一。

因此在选购(gou)无(wu)油(you)真(zhen)空(kong)泵时要先确定要求(qiu)工作的(de)(de)真(zhen)空(kong)度(du)，如果需(xu)(xu)求(qiu)的(de)(de)真(zhen)度(du)高(gao)，而选的(de)(de)真(zhen)空(kong)泵就要高(gao)于(yu)需(xu)(xu)求(qiu)的(de)(de)真(zhen)空(kong)度(du)，否则(ze)达不(bu)到抽真(zhen)空(kong)的(de)(de)要求(qiu)，就会达不(bu)到工作要求(qiu)。其次是无(wu)油(you)真(zhen)空(kong)泵抽气(qi)速率，选型时就要稍大于(yu)所需(xu)(xu)求(qiu)的(de)(de)抽气(qi)速率，这样(yang)就能(neng)(neng)更(geng)好的(de)(de)满足(zu)(zu)需(xu)(xu)要。最后看抽取的(de)(de)气(qi)体有(you)无(wu)腐蚀(shi)性(xing)，有(you)腐蚀(shi)的(de)(de)气(qi)体会腐蚀(shi)泵，必须要用特殊的(de)(de)材质(zhi)才能(neng)(neng)满足(zu)(zu)需(xu)(xu)求(qiu)。