无油式真空泵是一种(zhong)旋转式(shi)(shi)变(bian)容真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵须有(you)前级(ji)泵配合(he)方可(ke)使(shi)用在较宽(kuan)的压力(li)范围内(nei)有(you)较大的抽速(su)对(dui)被抽除(chu)气体中含有(you)灰尘(chen)和水蒸汽(qi)不敏(min)感广泛用于冶(ye)金、化工(gong)、食(shi)品(pin)、电子镀膜等行业。主要有(you)WLW系列立式(shi)(shi)无油(you)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵、W型(xing)(xing)(xing)(xing)(xing)(xing)往(wang)复式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵、2X,2XZ型(xing)(xing)(xing)(xing)(xing)(xing)旋片式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵、ZJ，ZJH型(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵（ZJH型(xing)(xing)(xing)(xing)(xing)(xing)为(wei)专利产(chan)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵品(pin)）、2SK、SK型(xing)(xing)(xing)(xing)(xing)(xing)水环式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵、2BV、2BA型(xing)(xing)(xing)(xing)(xing)(xing)水环式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵、H、2H型(xing)(xing)(xing)(xing)(xing)(xing)滑(hua)(hua)阀真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵、TLZ型(xing)(xing)(xing)(xing)(xing)(xing)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵、SL型(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)鼓风机(ji)、JZJHX型(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)旋片真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组、JZJHS型(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)水环真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组、JZJHWLW型(xing)(xing)(xing)(xing)(xing)(xing)立式(shi)(shi)无油(you)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组、JZJP型(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)水喷(pen)射真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组、JZJHBA型(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)水环真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组、RPP型(xing)(xing)(xing)(xing)(xing)(xing)水喷(pen)射真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵、JZJH2H型(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)滑(hua)(hua)阀式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组等型(xing)(xing)(xing)(xing)(xing)(xing)号。　　

　　工作原理：　

　　1.首先应该充分了(le)解被抽气(qi)体(ti)(ti)成分。如(ru)(ru)气(qi)体(ti)(ti)中(zhong)(zhong)含(han)不含(han)可(ke)凝蒸气(qi)、有(you)无颗粒(li)灰尘(chen)、有(you)无腐蚀(shi)性(xing)(xing)、爆炸性(xing)(xing)等。如(ru)(ru)果气(qi)体(ti)(ti)中(zhong)(zhong)含(han)有(you)蒸气(qi)、颗粒(li)、及腐蚀(shi)性(xing)(xing)气(qi)体(ti)(ti)，应该考虑在(zai)泵的进气(qi)口管路上(shang)安装辅助设备，如(ru)(ru)冷凝器、除尘(chen)器等。如(ru)(ru)抽取气(qi)体(ti)(ti)还有(you)腐蚀(shi)性(xing)(xing)，则须选(xuan)用材(cai)质。若抽取的气(qi)体(ti)(ti)具有(you)爆炸性(xing)(xing)，则应该选(xuan)择水环式真空泵并且配防爆电机，因为(wei)水环式真空泵整个(ge)工作(zuo)过(guo)程是等温(wen)的。　　

　　2.真空(kong)设备或者零部(bu)件对油(you)污染的要(yao)(yao)求(qiu)。若设备严格要(yao)(yao)求(qiu)无油(you)时，应(ying)该选各(ge)种无油(you)泵，如(ru)：水(shui)环式(shi)真空(kong)泵、分子筛吸附泵、溅(jian)射离子泵、低温泵等(deng)。若要(yao)(yao)求(qiu)不严格，可以(yi)选择有(you)油(you)泵，并(bing)且加上一(yi)些防(fang)油(you)污染措施，如(ru)加冷(leng)阱、障(zhang)板(ban)、挡(dang)油(you)阱等(deng)，也能达(da)到清洁真空(kong)要(yao)(yao)求(qiu)。　　

　　3.真(zhen)(zhen)空(kong)泵(beng)排(pai)出(chu)来的(de)油(you)(you)(you)蒸(zheng)气对环(huan)境的(de)影响如何。如果环(huan)境不允许有污(wu)染，可以(yi)选无(wu)油(you)(you)(you)真(zhen)(zhen)空(kong)泵(beng)如水环(huan)式真(zhen)(zhen)空(kong)泵(beng)，或者把油(you)(you)(you)蒸(zheng)气排(pai)到室外。　　

　　4.如(ru)有多台大型水环(huan)(huan)式真空泵同时工作，循(xun)环(huan)(huan)液应该(gai)进行(xing)冷却，否则影响(xiang)真空度。冷却装置可(ke)以配备(bei)冷却塔，同时须配增(zeng)压泵对管路加压。　

　　5.真(zhen)空(kong)(kong)泵的工作压(ya)强(qiang)应该满足真(zhen)空(kong)(kong)设备的极限真(zhen)空(kong)(kong)及工作压(ya)强(qiang)要求。通常选择(ze)真(zhen)空(kong)(kong)泵泵的真(zhen)空(kong)(kong)度要高于真(zhen)空(kong)(kong)设备真(zhen)空(kong)(kong)度半个到(dao)一个数量级。　

　　6.真空泵(beng)在其工(gong)(gong)作压强下，应能排走真空设备工(gong)(gong)艺过程(cheng)中产生(sheng)的全部气体量。

它具(ju)有结(jie)构简(jian)单(dan)、操(cao)作容易、维护(hu)方(fang)便、不会污染环(huan)境等优点。无油真(zhen)空泵(beng)耐用(yong)性好，是抽真(zhen)空，压缩，两(liang)用(yong)真(zhen)空泵(beng)，是一种应用(yong)范围(wei)非常(chang)广泛(fan)获得(de)真(zhen)空的基本设备。

无油真空泵与油泵相(xiang)比真空度低，抽气量小(xiao)，但体积小(xiao)巧，易于(yu)安(an)装，维护(hu)简单，移动(dong)方便，不产生油烟，不污染环境，尤其在要求(qiu)较高(gao)的(de)实(shi)验室使用(yong)较好。也是实(shi)验室最常备的(de)设备之一。

因此在选(xuan)购(gou)无(wu)油真(zhen)(zhen)(zhen)空泵(beng)时(shi)(shi)要(yao)(yao)(yao)先确定(ding)要(yao)(yao)(yao)求(qiu)(qiu)(qiu)工作的(de)(de)(de)真(zhen)(zhen)(zhen)空度，如果需求(qiu)(qiu)(qiu)的(de)(de)(de)真(zhen)(zhen)(zhen)度高，而(er)选(xuan)的(de)(de)(de)真(zhen)(zhen)(zhen)空泵(beng)就要(yao)(yao)(yao)高于需求(qiu)(qiu)(qiu)的(de)(de)(de)真(zhen)(zhen)(zhen)空度，否则达不到抽真(zhen)(zhen)(zhen)空的(de)(de)(de)要(yao)(yao)(yao)求(qiu)(qiu)(qiu)，就会达不到工作要(yao)(yao)(yao)求(qiu)(qiu)(qiu)。其次是无(wu)油真(zhen)(zhen)(zhen)空泵(beng)抽气(qi)速率，选(xuan)型(xing)时(shi)(shi)就要(yao)(yao)(yao)稍大(da)于所(suo)需求(qiu)(qiu)(qiu)的(de)(de)(de)抽气(qi)速率，这(zhei)样就能(neng)更好的(de)(de)(de)满(man)足(zu)需要(yao)(yao)(yao)。最(zui)后看抽取的(de)(de)(de)气(qi)体有(you)无(wu)腐蚀(shi)(shi)性，有(you)腐蚀(shi)(shi)的(de)(de)(de)气(qi)体会腐蚀(shi)(shi)泵(beng)，必须要(yao)(yao)(yao)用特殊的(de)(de)(de)材质才(cai)能(neng)满(man)足(zu)需求(qiu)(qiu)(qiu)。