无油式真空泵是一(yi)种旋转式(shi)(shi)(shi)(shi)(shi)变容(rong)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)须有前(qian)级(ji)泵(beng)(beng)配合方可使(shi)用在较(jiao)宽的压力范围内有较(jiao)大的抽(chou)(chou)速对被抽(chou)(chou)除气(qi)体中含有灰尘和水(shui)(shui)蒸汽不敏感广泛(fan)用于冶金(jin)、化工(gong)、食品、电子(zi)镀膜等(deng)行(xing)业。主要(yao)有WLW系(xi)列立(li)式(shi)(shi)(shi)(shi)(shi)无(wu)油(you)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、W型(xing)(xing)往复式(shi)(shi)(shi)(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、2X,2XZ型(xing)(xing)旋片式(shi)(shi)(shi)(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、ZJ，ZJH型(xing)(xing)罗(luo)(luo)茨(ci)真(zhen)(zhen)(zhen)(zhen)空(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)泵(beng)(beng)品）、2SK、SK型(xing)(xing)水(shui)(shui)环式(shi)(shi)(shi)(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、2BV、2BA型(xing)(xing)水(shui)(shui)环式(shi)(shi)(shi)(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、H、2H型(xing)(xing)滑(hua)阀(fa)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、TLZ型(xing)(xing)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、SL型(xing)(xing)罗(luo)(luo)茨(ci)鼓风机(ji)(ji)、JZJHX型(xing)(xing)罗(luo)(luo)茨(ci)旋片真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组、JZJHS型(xing)(xing)罗(luo)(luo)茨(ci)水(shui)(shui)环真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组、JZJHWLW型(xing)(xing)立(li)式(shi)(shi)(shi)(shi)(shi)无(wu)油(you)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组、JZJP型(xing)(xing)罗(luo)(luo)茨(ci)水(shui)(shui)喷射(she)(she)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组、JZJHBA型(xing)(xing)罗(luo)(luo)茨(ci)水(shui)(shui)环真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组、RPP型(xing)(xing)水(shui)(shui)喷射(she)(she)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、JZJH2H型(xing)(xing)罗(luo)(luo)茨(ci)滑(hua)阀(fa)式(shi)(shi)(shi)(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)(ji)组等(deng)型(xing)(xing)号。　　

　　工作原理：　

　　1.首先(xian)应该(gai)充分了解被抽(chou)(chou)气(qi)体(ti)成分。如(ru)气(qi)体(ti)中(zhong)含不含可(ke)凝蒸气(qi)、有无颗粒(li)灰尘、有无腐(fu)蚀(shi)性(xing)、爆炸性(xing)等(deng)。如(ru)果气(qi)体(ti)中(zhong)含有蒸气(qi)、颗粒(li)、及腐(fu)蚀(shi)性(xing)气(qi)体(ti)，应该(gai)考虑在(zai)泵的(de)进(jin)气(qi)口(kou)管路(lu)上安装辅助设(she)备，如(ru)冷凝器、除(chu)尘器等(deng)。如(ru)抽(chou)(chou)取气(qi)体(ti)还有腐(fu)蚀(shi)性(xing)，则须(xu)选用材(cai)质。若抽(chou)(chou)取的(de)气(qi)体(ti)具有爆炸性(xing)，则应该(gai)选择水环(huan)式真(zhen)空泵并且配防爆电(dian)机，因为水环(huan)式真(zhen)空泵整个(ge)工作(zuo)过(guo)程是等(deng)温(wen)的(de)。　　

　　2.真空设(she)备或者零(ling)部件对油(you)污染(ran)(ran)的要求。若设(she)备严格(ge)要求无(wu)油(you)时(shi)，应该选各种无(wu)油(you)泵(beng)，如：水环式真空泵(beng)、分子筛吸附泵(beng)、溅射离子泵(beng)、低温泵(beng)等。若要求不严格(ge)，可以(yi)选择有油(you)泵(beng)，并(bing)且加(jia)上一些防油(you)污染(ran)(ran)措(cuo)施(shi)，如加(jia)冷阱(jing)、障板、挡油(you)阱(jing)等，也能达到清(qing)洁真空要求。　　

　　3.真空泵排出来的油(you)蒸气对(dui)环境的影(ying)响如何。如果(guo)环境不允许有污染，可以(yi)选(xuan)无油(you)真空泵如水(shui)环式真空泵，或者把油(you)蒸气排到(dao)室外。　　

　　4.如有多台大型水环(huan)式真(zhen)空泵同时(shi)工作，循环(huan)液应(ying)该进行冷(leng)却(que)，否则影响真(zhen)空度(du)。冷(leng)却(que)装置可以(yi)配备冷(leng)却(que)塔，同时(shi)须配增压泵对管路加(jia)压。　

　　5.真(zhen)空(kong)(kong)泵的(de)工(gong)作(zuo)压(ya)强(qiang)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(ya)强(qiang)要求(qiu)。通常(chang)选择真(zhen)空(kong)(kong)泵泵的(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(yi)个数量级。　

　　6.真空(kong)(kong)泵在(zai)其工(gong)作压强(qiang)下(xia)，应(ying)能排走真空(kong)(kong)设备工(gong)艺(yi)过程(cheng)中产生(sheng)的全部气(qi)体量(liang)。

它具有结构简单、操(cao)作容易、维护方便、不会污染环境等优点。无油真空(kong)(kong)泵耐用性好，是(shi)抽真空(kong)(kong)，压缩，两(liang)用真空(kong)(kong)泵，是(shi)一种应用范围非常广泛(fan)获得真空(kong)(kong)的基本设备(bei)。

无油(you)(you)真空泵(beng)与油(you)(you)泵(beng)相比(bi)真空度低(di)，抽气量小，但体(ti)积小巧，易于安装，维护简单，移动方便，不(bu)产生油(you)(you)烟，不(bu)污染环境，尤其在要求较高(gao)的实验(yan)室(shi)使用(yong)较好。也是实验(yan)室(shi)最常备(bei)的设备(bei)之一。

因(yin)此在选(xuan)购无油真(zhen)空(kong)(kong)泵(beng)(beng)时要(yao)(yao)先确定要(yao)(yao)求工作的(de)(de)真(zhen)空(kong)(kong)度，如果需(xu)求的(de)(de)真(zhen)度高，而选(xuan)的(de)(de)真(zhen)空(kong)(kong)泵(beng)(beng)就(jiu)(jiu)要(yao)(yao)高于需(xu)求的(de)(de)真(zhen)空(kong)(kong)度，否则达不到抽(chou)真(zhen)空(kong)(kong)的(de)(de)要(yao)(yao)求，就(jiu)(jiu)会达不到工作要(yao)(yao)求。其次是无油真(zhen)空(kong)(kong)泵(beng)(beng)抽(chou)气速(su)率，选(xuan)型时就(jiu)(jiu)要(yao)(yao)稍大于所需(xu)求的(de)(de)抽(chou)气速(su)率，这样就(jiu)(jiu)能(neng)更好(hao)的(de)(de)满足(zu)需(xu)要(yao)(yao)。最后看抽(chou)取的(de)(de)气体(ti)有无腐蚀(shi)性，有腐蚀(shi)的(de)(de)气体(ti)会腐蚀(shi)泵(beng)(beng)，必(bi)须(xu)要(yao)(yao)用特殊的(de)(de)材质才能(neng)满足(zu)需(xu)求。