无油式真空泵是一种(zhong)旋(xuan)转式(shi)(shi)变(bian)容真(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)须(xu)有前(qian)级泵(beng)(beng)(beng)配合方可使用在较宽的压力(li)范围内有较大的抽(chou)速对被抽(chou)除气体(ti)中含有灰尘和水(shui)蒸汽不敏(min)感广泛用于冶金、化工、食品、电子镀膜等行(xing)业。主要有WLW系列立式(shi)(shi)无油真(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、W型(xing)(xing)(xing)(xing)(xing)往(wang)复式(shi)(shi)真(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2X,2XZ型(xing)(xing)(xing)(xing)(xing)旋(xuan)片式(shi)(shi)真(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、ZJ，ZJH型(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)(luo)茨(ci)(ci)真(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)（ZJH型(xing)(xing)(xing)(xing)(xing)为专利(li)产真(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)品）、2SK、SK型(xing)(xing)(xing)(xing)(xing)水(shui)环(huan)式(shi)(shi)真(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2BV、2BA型(xing)(xing)(xing)(xing)(xing)水(shui)环(huan)式(shi)(shi)真(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、H、2H型(xing)(xing)(xing)(xing)(xing)滑阀真(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、TLZ型(xing)(xing)(xing)(xing)(xing)真(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、SL型(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)(luo)茨(ci)(ci)鼓风机(ji)、JZJHX型(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)(luo)茨(ci)(ci)旋(xuan)片真(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)组(zu)(zu)、JZJHS型(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)(luo)茨(ci)(ci)水(shui)环(huan)真(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)组(zu)(zu)、JZJHWLW型(xing)(xing)(xing)(xing)(xing)立式(shi)(shi)无油真(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)组(zu)(zu)、JZJP型(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)(luo)茨(ci)(ci)水(shui)喷射真(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)组(zu)(zu)、JZJHBA型(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)(luo)茨(ci)(ci)水(shui)环(huan)真(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)组(zu)(zu)、RPP型(xing)(xing)(xing)(xing)(xing)水(shui)喷射真(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、JZJH2H型(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)(luo)茨(ci)(ci)滑阀式(shi)(shi)真(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)组(zu)(zu)等型(xing)(xing)(xing)(xing)(xing)号(hao)。　　

　　工作原理：　

　　1.首先(xian)应(ying)该充分(fen)了解被抽气(qi)(qi)(qi)体(ti)(ti)成分(fen)。如(ru)气(qi)(qi)(qi)体(ti)(ti)中含(han)不含(han)可凝蒸气(qi)(qi)(qi)、有(you)(you)无颗(ke)粒(li)灰(hui)尘、有(you)(you)无腐蚀性(xing)、爆(bao)炸性(xing)等(deng)(deng)。如(ru)果气(qi)(qi)(qi)体(ti)(ti)中含(han)有(you)(you)蒸气(qi)(qi)(qi)、颗(ke)粒(li)、及腐蚀性(xing)气(qi)(qi)(qi)体(ti)(ti)，应(ying)该考虑在泵的进气(qi)(qi)(qi)口管路上安装(zhuang)辅助设备，如(ru)冷(leng)凝器、除尘器等(deng)(deng)。如(ru)抽取气(qi)(qi)(qi)体(ti)(ti)还有(you)(you)腐蚀性(xing)，则须(xu)选(xuan)用(yong)材质。若抽取的气(qi)(qi)(qi)体(ti)(ti)具有(you)(you)爆(bao)炸性(xing)，则应(ying)该选(xuan)择(ze)水环式真(zhen)空泵并(bing)且配(pei)防爆(bao)电机(ji)，因为水环式真(zhen)空泵整个工作过程(cheng)是等(deng)(deng)温的。　　

　　2.真空(kong)设(she)备(bei)或者零(ling)部件(jian)对油(you)(you)污染的要求。若设(she)备(bei)严格要求无油(you)(you)时，应该选各种无油(you)(you)泵(beng)，如：水环式真空(kong)泵(beng)、分子筛(shai)吸附(fu)泵(beng)、溅射离子泵(beng)、低温(wen)泵(beng)等(deng)(deng)。若要求不严格，可(ke)以选择有(you)油(you)(you)泵(beng)，并且加上一些防油(you)(you)污染措施，如加冷阱、障板(ban)、挡油(you)(you)阱等(deng)(deng)，也能达到(dao)清(qing)洁真空(kong)要求。　　

　　3.真空(kong)泵(beng)排出来的油蒸气对(dui)环境(jing)的影响如(ru)何。如(ru)果环境(jing)不(bu)允许有污染，可以(yi)选无油真空(kong)泵(beng)如(ru)水环式真空(kong)泵(beng)，或者(zhe)把(ba)油蒸气排到室外。　　

　　4.如有(you)多(duo)台大型水(shui)环式真空泵(beng)同时(shi)(shi)工作，循(xun)环液应该进(jin)行冷却，否则影(ying)响真空度。冷却装置可以配备冷却塔，同时(shi)(shi)须配增(zeng)压(ya)泵(beng)对管路加压(ya)。　

　　5.真(zhen)空(kong)(kong)泵(beng)(beng)的(de)工(gong)作(zuo)压强应该满足真(zhen)空(kong)(kong)设备的(de)极限真(zhen)空(kong)(kong)及工(gong)作(zuo)压强要求(qiu)。通常选择真(zhen)空(kong)(kong)泵(beng)(beng)泵(beng)(beng)的(de)真(zhen)空(kong)(kong)度要高于真(zhen)空(kong)(kong)设备真(zhen)空(kong)(kong)度半个到一个数量级。　

　　6.真(zhen)空泵(beng)在其工作压(ya)强下，应能排走真(zhen)空设备工艺过程中产生的全(quan)部气(qi)体(ti)量。

它具有结(jie)构简单、操(cao)作容易、维护方便、不会污染(ran)环境等优点(dian)。无(wu)油真空(kong)(kong)泵(beng)耐用(yong)(yong)性好，是(shi)抽真空(kong)(kong)，压缩，两(liang)用(yong)(yong)真空(kong)(kong)泵(beng)，是(shi)一种(zhong)应用(yong)(yong)范(fan)围非常(chang)广泛获得真空(kong)(kong)的基本设(she)备(bei)。

无油(you)真空(kong)泵与油(you)泵相比真空(kong)度(du)低(di)，抽气量小，但(dan)体积小巧，易于(yu)安装，维护简(jian)单，移(yi)动方便，不(bu)产生油(you)烟，不(bu)污染环(huan)境，尤其在要(yao)求较(jiao)(jiao)高的实(shi)(shi)验室(shi)使(shi)用较(jiao)(jiao)好。也是实(shi)(shi)验室(shi)最常备的设备之一。

因此在选购无(wu)(wu)(wu)油真空泵(beng)时(shi)(shi)要(yao)(yao)(yao)(yao)(yao)先确定要(yao)(yao)(yao)(yao)(yao)求(qiu)工作(zuo)的(de)(de)真空度，如果需求(qiu)的(de)(de)真度高，而选的(de)(de)真空泵(beng)就(jiu)要(yao)(yao)(yao)(yao)(yao)高于需求(qiu)的(de)(de)真空度，否则达(da)不到抽真空的(de)(de)要(yao)(yao)(yao)(yao)(yao)求(qiu)，就(jiu)会(hui)达(da)不到工作(zuo)要(yao)(yao)(yao)(yao)(yao)求(qiu)。其次(ci)是无(wu)(wu)(wu)油真空泵(beng)抽气速(su)率，选型(xing)时(shi)(shi)就(jiu)要(yao)(yao)(yao)(yao)(yao)稍(shao)大(da)于所需求(qiu)的(de)(de)抽气速(su)率，这样就(jiu)能(neng)更好的(de)(de)满(man)足需要(yao)(yao)(yao)(yao)(yao)。最(zui)后(hou)看(kan)抽取的(de)(de)气体有无(wu)(wu)(wu)腐蚀(shi)性，有腐蚀(shi)的(de)(de)气体会(hui)腐蚀(shi)泵(beng)，必须要(yao)(yao)(yao)(yao)(yao)用特殊的(de)(de)材质才能(neng)满(man)足需求(qiu)。