无油式真空泵是一种(zhong)旋(xuan)转式变容(rong)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)须(xu)有前级泵(beng)(beng)配合方(fang)可使(shi)用在(zai)较宽(kuan)的压力范围内有较大的抽速对被抽除(chu)气体中(zhong)含有灰尘和(he)水(shui)(shui)蒸汽不敏(min)感广(guang)泛用于冶金、化(hua)工、食品(pin)、电子镀(du)膜(mo)等(deng)行业。主要有WLW系列立式无(wu)油真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、W型(xing)(xing)往复式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、2X,2XZ型(xing)(xing)旋(xuan)片式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、ZJ，ZJH型(xing)(xing)罗(luo)(luo)茨(ci)(ci)(ci)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)（ZJH型(xing)(xing)为专利产真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)品(pin)）、2SK、SK型(xing)(xing)水(shui)(shui)环式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、2BV、2BA型(xing)(xing)水(shui)(shui)环式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、H、2H型(xing)(xing)滑(hua)阀真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、TLZ型(xing)(xing)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、SL型(xing)(xing)罗(luo)(luo)茨(ci)(ci)(ci)鼓风(feng)机(ji)(ji)、JZJHX型(xing)(xing)罗(luo)(luo)茨(ci)(ci)(ci)旋(xuan)片真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)(zu)、JZJHS型(xing)(xing)罗(luo)(luo)茨(ci)(ci)(ci)水(shui)(shui)环真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)(zu)、JZJHWLW型(xing)(xing)立式无(wu)油真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)(zu)、JZJP型(xing)(xing)罗(luo)(luo)茨(ci)(ci)(ci)水(shui)(shui)喷射真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)(zu)、JZJHBA型(xing)(xing)罗(luo)(luo)茨(ci)(ci)(ci)水(shui)(shui)环真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)(zu)、RPP型(xing)(xing)水(shui)(shui)喷射真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、JZJH2H型(xing)(xing)罗(luo)(luo)茨(ci)(ci)(ci)滑(hua)阀式真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)(zu)等(deng)型(xing)(xing)号。　　

　　工作原理：　

　　1.首先应(ying)该充分了解被(bei)抽气(qi)体(ti)成分。如(ru)气(qi)体(ti)中(zhong)含不含可凝蒸气(qi)、有无颗粒(li)灰尘(chen)、有无腐(fu)蚀性(xing)(xing)、爆(bao)炸(zha)性(xing)(xing)等。如(ru)果气(qi)体(ti)中(zhong)含有蒸气(qi)、颗粒(li)、及腐(fu)蚀性(xing)(xing)气(qi)体(ti)，应(ying)该考虑在泵的(de)进气(qi)口管路(lu)上(shang)安装辅助设备(bei)，如(ru)冷凝器、除尘(chen)器等。如(ru)抽取气(qi)体(ti)还(hai)有腐(fu)蚀性(xing)(xing)，则须选(xuan)用(yong)材质。若抽取的(de)气(qi)体(ti)具有爆(bao)炸(zha)性(xing)(xing)，则应(ying)该选(xuan)择水环式(shi)真空泵并(bing)且配防爆(bao)电机(ji)，因为水环式(shi)真空泵整(zheng)个(ge)工(gong)作过程是等温的(de)。　　

　　2.真空设(she)(she)备或者零部件对油(you)污染的要(yao)(yao)求(qiu)。若(ruo)设(she)(she)备严格(ge)要(yao)(yao)求(qiu)无(wu)油(you)时，应该选各种(zhong)无(wu)油(you)泵，如(ru)：水环式真空泵、分子(zi)(zi)筛吸附泵、溅射(she)离(li)子(zi)(zi)泵、低温(wen)泵等(deng)。若(ruo)要(yao)(yao)求(qiu)不严格(ge)，可以选择有油(you)泵，并且加上一些防油(you)污染措施，如(ru)加冷阱、障板、挡油(you)阱等(deng)，也能达到清洁真空要(yao)(yao)求(qiu)。　　

　　3.真(zhen)空泵排出来(lai)的(de)油蒸气对环境的(de)影响如(ru)何。如(ru)果环境不允许有污染(ran)，可以选无油真(zhen)空泵如(ru)水环式真(zhen)空泵，或者把油蒸气排到室外。　　

　　4.如(ru)有多台(tai)大型水环式(shi)真空泵(beng)同时工作，循环液应该(gai)进行冷(leng)却(que)，否(fou)则影响真空度。冷(leng)却(que)装置可以配(pei)(pei)备(bei)冷(leng)却(que)塔，同时须配(pei)(pei)增压泵(beng)对(dui)管路加(jia)压。　

　　5.真(zhen)(zhen)空泵(beng)的(de)工作压强(qiang)应该满足(zu)真(zhen)(zhen)空设备的(de)极限真(zhen)(zhen)空及(ji)工作压强(qiang)要求。通常选择真(zhen)(zhen)空泵(beng)泵(beng)的(de)真(zhen)(zhen)空度(du)要高于真(zhen)(zhen)空设备真(zhen)(zhen)空度(du)半(ban)个(ge)到一个(ge)数量级。　

　　6.真空泵在其(qi)工(gong)作压强下(xia)，应能排走真空设备工(gong)艺过程中产生的全部气体量。

它具有结(jie)构简单、操作容易、维护方(fang)便、不会(hui)污染(ran)环(huan)境等优(you)点。无(wu)油真(zhen)(zhen)(zhen)空泵耐(nai)用(yong)性好(hao)，是抽真(zhen)(zhen)(zhen)空，压缩，两用(yong)真(zhen)(zhen)(zhen)空泵，是一种(zhong)应用(yong)范围非常广泛获得真(zhen)(zhen)(zhen)空的基本设备。

无(wu)油真空(kong)泵(beng)与油泵(beng)相比真空(kong)度低，抽气量(liang)小，但(dan)体积小巧，易于安装，维护简单(dan)，移动方便，不产(chan)生油烟，不污染环境(jing)，尤(you)其在要求较高(gao)的(de)(de)实(shi)验室使用较好。也是实(shi)验室最常备(bei)的(de)(de)设备(bei)之(zhi)一。

因此(ci)在(zai)选购无油真(zhen)空(kong)(kong)泵(beng)时要(yao)(yao)(yao)先(xian)确(que)定(ding)要(yao)(yao)(yao)求(qiu)(qiu)工(gong)作的(de)(de)真(zhen)空(kong)(kong)度，如(ru)果(guo)需(xu)求(qiu)(qiu)的(de)(de)真(zhen)度高，而选的(de)(de)真(zhen)空(kong)(kong)泵(beng)就(jiu)要(yao)(yao)(yao)高于需(xu)求(qiu)(qiu)的(de)(de)真(zhen)空(kong)(kong)度，否则达不(bu)到抽(chou)(chou)真(zhen)空(kong)(kong)的(de)(de)要(yao)(yao)(yao)求(qiu)(qiu)，就(jiu)会(hui)达不(bu)到工(gong)作要(yao)(yao)(yao)求(qiu)(qiu)。其次是无油真(zhen)空(kong)(kong)泵(beng)抽(chou)(chou)气(qi)速(su)率，选型时就(jiu)要(yao)(yao)(yao)稍大于所需(xu)求(qiu)(qiu)的(de)(de)抽(chou)(chou)气(qi)速(su)率，这样就(jiu)能(neng)更好的(de)(de)满(man)足需(xu)要(yao)(yao)(yao)。最后(hou)看(kan)抽(chou)(chou)取的(de)(de)气(qi)体有(you)(you)无腐(fu)蚀(shi)(shi)性，有(you)(you)腐(fu)蚀(shi)(shi)的(de)(de)气(qi)体会(hui)腐(fu)蚀(shi)(shi)泵(beng)，必须要(yao)(yao)(yao)用(yong)特殊的(de)(de)材质才能(neng)满(man)足需(xu)求(qiu)(qiu)。