无油式真空泵是一种旋转(zhuan)式(shi)变容(rong)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)须有(you)前级(ji)泵(beng)配合方(fang)可使用在较宽(kuan)的压力范围内有(you)较大的抽(chou)速(su)对被抽(chou)除气(qi)体(ti)中含有(you)灰尘(chen)和水(shui)(shui)(shui)蒸汽不敏(min)感(gan)广泛用于(yu)冶金(jin)、化工、食品(pin)、电子镀(du)膜(mo)等行(xing)业。主要有(you)WLW系列(lie)立式(shi)无油(you)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)、W型(xing)(xing)(xing)(xing)(xing)(xing)往(wang)复(fu)式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)、2X,2XZ型(xing)(xing)(xing)(xing)(xing)(xing)旋片(pian)式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)、ZJ，ZJH型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)茨真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)（ZJH型(xing)(xing)(xing)(xing)(xing)(xing)为专利产(chan)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)品(pin)）、2SK、SK型(xing)(xing)(xing)(xing)(xing)(xing)水(shui)(shui)(shui)环式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)、2BV、2BA型(xing)(xing)(xing)(xing)(xing)(xing)水(shui)(shui)(shui)环式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)、H、2H型(xing)(xing)(xing)(xing)(xing)(xing)滑(hua)阀(fa)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)、TLZ型(xing)(xing)(xing)(xing)(xing)(xing)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)、SL型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)茨鼓风机(ji)(ji)、JZJHX型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)茨旋片(pian)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)、JZJHS型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)茨水(shui)(shui)(shui)环真(zhen)(zhen)(zhen)空(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)、JZJHWLW型(xing)(xing)(xing)(xing)(xing)(xing)立式(shi)无油(you)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)、JZJP型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)茨水(shui)(shui)(shui)喷(pen)射(she)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)、JZJHBA型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)茨水(shui)(shui)(shui)环真(zhen)(zhen)(zhen)空(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)、RPP型(xing)(xing)(xing)(xing)(xing)(xing)水(shui)(shui)(shui)喷(pen)射(she)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)、JZJH2H型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)(luo)茨滑(hua)阀(fa)式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)机(ji)(ji)组(zu)(zu)等型(xing)(xing)(xing)(xing)(xing)(xing)号(hao)。　　

　　工作原理：　

　　1.首先应(ying)(ying)(ying)该(gai)充分了解被抽气(qi)(qi)体(ti)(ti)成分。如气(qi)(qi)体(ti)(ti)中(zhong)含(han)不含(han)可凝(ning)(ning)蒸(zheng)气(qi)(qi)、有无颗粒灰尘、有无腐蚀性(xing)、爆(bao)炸(zha)性(xing)等(deng)。如果气(qi)(qi)体(ti)(ti)中(zhong)含(han)有蒸(zheng)气(qi)(qi)、颗粒、及腐蚀性(xing)气(qi)(qi)体(ti)(ti)，应(ying)(ying)(ying)该(gai)考虑在泵的进气(qi)(qi)口(kou)管路上安装辅(fu)助设(she)备，如冷凝(ning)(ning)器、除(chu)尘器等(deng)。如抽取气(qi)(qi)体(ti)(ti)还有腐蚀性(xing)，则(ze)须(xu)选用材质。若抽取的气(qi)(qi)体(ti)(ti)具有爆(bao)炸(zha)性(xing)，则(ze)应(ying)(ying)(ying)该(gai)选择(ze)水环(huan)(huan)式(shi)真空泵并(bing)且配(pei)防爆(bao)电机，因为水环(huan)(huan)式(shi)真空泵整个工作过程(cheng)是等(deng)温的。　　

　　2.真空(kong)设(she)备或者零部件(jian)对油污染(ran)的要求。若设(she)备严(yan)格(ge)(ge)要求无油时，应(ying)该选(xuan)各种无油泵(beng)，如：水(shui)环式真空(kong)泵(beng)、分子筛(shai)吸附泵(beng)、溅射离子泵(beng)、低温泵(beng)等(deng)。若要求不严(yan)格(ge)(ge)，可以选(xuan)择有油泵(beng)，并且(qie)加上(shang)一些防油污染(ran)措施，如加冷阱(jing)、障板(ban)、挡油阱(jing)等(deng)，也能达到清洁真空(kong)要求。　　

　　3.真空(kong)(kong)泵排出来的油蒸(zheng)气对(dui)环(huan)境的影响如何。如果环(huan)境不允许有污染(ran)，可以选无油真空(kong)(kong)泵如水(shui)环(huan)式(shi)真空(kong)(kong)泵，或者把(ba)油蒸(zheng)气排到(dao)室外。　　

　　4.如有多台大型水环(huan)(huan)式(shi)真空泵(beng)同时工作，循(xun)环(huan)(huan)液应该进行冷(leng)却(que)(que)，否则影响真空度。冷(leng)却(que)(que)装置可以配备冷(leng)却(que)(que)塔，同时须配增压(ya)泵(beng)对管路(lu)加压(ya)。　

　　5.真(zhen)空(kong)(kong)(kong)泵的(de)工(gong)作(zuo)压强(qiang)应该满足真(zhen)空(kong)(kong)(kong)设备的(de)极限真(zhen)空(kong)(kong)(kong)及(ji)工(gong)作(zuo)压强(qiang)要求。通(tong)常(chang)选择(ze)真(zhen)空(kong)(kong)(kong)泵泵的(de)真(zhen)空(kong)(kong)(kong)度要高于真(zhen)空(kong)(kong)(kong)设备真(zhen)空(kong)(kong)(kong)度半个(ge)到一个(ge)数量级。　

　　6.真空泵在其工作(zuo)压强下，应(ying)能排(pai)走真空设备工艺(yi)过程中产(chan)生(sheng)的(de)全(quan)部气体(ti)量。

它具有结构简单、操(cao)作容易、维护方(fang)便、不会(hui)污染(ran)环(huan)境等优点。无油真(zhen)空泵耐用性好，是(shi)抽真(zhen)空，压缩，两用真(zhen)空泵，是(shi)一种应用范围(wei)非常广泛(fan)获得真(zhen)空的基本设备。

无(wu)油真空(kong)泵与(yu)油泵相(xiang)比真空(kong)度(du)低(di)，抽气量小，但体积(ji)小巧，易于安装，维(wei)护(hu)简单，移动方便，不(bu)(bu)产(chan)生油烟，不(bu)(bu)污染环(huan)境(jing)，尤其在要求较高的实(shi)验室使用(yong)较好。也是实(shi)验室最常备(bei)的设备(bei)之(zhi)一。

因此在选(xuan)购无油真(zhen)(zhen)(zhen)空泵(beng)时(shi)要(yao)先确定要(yao)求(qiu)(qiu)工(gong)作(zuo)的(de)真(zhen)(zhen)(zhen)空度，如果需(xu)(xu)(xu)求(qiu)(qiu)的(de)真(zhen)(zhen)(zhen)度高，而(er)选(xuan)的(de)真(zhen)(zhen)(zhen)空泵(beng)就(jiu)要(yao)高于(yu)(yu)需(xu)(xu)(xu)求(qiu)(qiu)的(de)真(zhen)(zhen)(zhen)空度，否则达不到(dao)抽(chou)(chou)真(zhen)(zhen)(zhen)空的(de)要(yao)求(qiu)(qiu)，就(jiu)会达不到(dao)工(gong)作(zuo)要(yao)求(qiu)(qiu)。其次(ci)是(shi)无油真(zhen)(zhen)(zhen)空泵(beng)抽(chou)(chou)气(qi)速率，选(xuan)型时(shi)就(jiu)要(yao)稍大于(yu)(yu)所需(xu)(xu)(xu)求(qiu)(qiu)的(de)抽(chou)(chou)气(qi)速率，这样(yang)就(jiu)能更(geng)好的(de)满足需(xu)(xu)(xu)要(yao)。最(zui)后看抽(chou)(chou)取(qu)的(de)气(qi)体有无腐(fu)蚀性，有腐(fu)蚀的(de)气(qi)体会腐(fu)蚀泵(beng)，必须要(yao)用特殊的(de)材质才能满足需(xu)(xu)(xu)求(qiu)(qiu)。