无油式真空泵是(shi)一种旋转式(shi)(shi)(shi)变(bian)容真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)须有(you)前级泵(beng)配合方可(ke)使用(yong)在较宽的压力范围内(nei)有(you)较大的抽速对被抽除气(qi)体中(zhong)含有(you)灰(hui)尘和水(shui)(shui)(shui)蒸汽不(bu)敏感广泛用(yong)于冶金、化工、食品(pin)、电子(zi)镀膜等行业。主要有(you)WLW系列(lie)立式(shi)(shi)(shi)无油真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)、W型(xing)(xing)(xing)(xing)往复(fu)式(shi)(shi)(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)、2X,2XZ型(xing)(xing)(xing)(xing)旋片(pian)式(shi)(shi)(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)、ZJ，ZJH型(xing)(xing)(xing)(xing)罗茨(ci)(ci)(ci)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)（ZJH型(xing)(xing)(xing)(xing)为专利产真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)品(pin)）、2SK、SK型(xing)(xing)(xing)(xing)水(shui)(shui)(shui)环(huan)式(shi)(shi)(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)、2BV、2BA型(xing)(xing)(xing)(xing)水(shui)(shui)(shui)环(huan)式(shi)(shi)(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)、H、2H型(xing)(xing)(xing)(xing)滑阀真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)、TLZ型(xing)(xing)(xing)(xing)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)、SL型(xing)(xing)(xing)(xing)罗茨(ci)(ci)(ci)鼓(gu)风机(ji)(ji)、JZJHX型(xing)(xing)(xing)(xing)罗茨(ci)(ci)(ci)旋片(pian)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)、JZJHS型(xing)(xing)(xing)(xing)罗茨(ci)(ci)(ci)水(shui)(shui)(shui)环(huan)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)、JZJHWLW型(xing)(xing)(xing)(xing)立式(shi)(shi)(shi)无油真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)、JZJP型(xing)(xing)(xing)(xing)罗茨(ci)(ci)(ci)水(shui)(shui)(shui)喷(pen)射真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)、JZJHBA型(xing)(xing)(xing)(xing)罗茨(ci)(ci)(ci)水(shui)(shui)(shui)环(huan)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)、RPP型(xing)(xing)(xing)(xing)水(shui)(shui)(shui)喷(pen)射真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)、JZJH2H型(xing)(xing)(xing)(xing)罗茨(ci)(ci)(ci)滑阀式(shi)(shi)(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)等型(xing)(xing)(xing)(xing)号。　　

　　工作原理：　

　　1.首先应该(gai)(gai)充分了解(jie)被抽(chou)气(qi)体成分。如(ru)(ru)气(qi)体中含(han)不含(han)可凝蒸(zheng)气(qi)、有(you)无颗粒(li)灰(hui)尘、有(you)无腐蚀性(xing)、爆(bao)炸性(xing)等(deng)。如(ru)(ru)果气(qi)体中含(han)有(you)蒸(zheng)气(qi)、颗粒(li)、及(ji)腐蚀性(xing)气(qi)体，应该(gai)(gai)考虑在泵(beng)的进气(qi)口管(guan)路上安装辅助设备(bei)，如(ru)(ru)冷凝器(qi)(qi)、除尘器(qi)(qi)等(deng)。如(ru)(ru)抽(chou)取气(qi)体还有(you)腐蚀性(xing)，则(ze)须选(xuan)用(yong)材质。若抽(chou)取的气(qi)体具有(you)爆(bao)炸性(xing)，则(ze)应该(gai)(gai)选(xuan)择水(shui)环(huan)式真空(kong)泵(beng)并且配(pei)防(fang)爆(bao)电机，因为(wei)水(shui)环(huan)式真空(kong)泵(beng)整个工作过程是等(deng)温的。　　

　　2.真(zhen)空设备(bei)或者零部件对油污染的(de)要求(qiu)。若设备(bei)严(yan)(yan)格(ge)要求(qiu)无油时，应该选(xuan)各(ge)种无油泵(beng)，如(ru)：水环式真(zhen)空泵(beng)、分(fen)子(zi)筛吸附(fu)泵(beng)、溅射离子(zi)泵(beng)、低(di)温泵(beng)等。若要求(qiu)不严(yan)(yan)格(ge)，可(ke)以选(xuan)择有油泵(beng)，并且加(jia)上(shang)一些防(fang)油污染措施(shi)，如(ru)加(jia)冷阱、障(zhang)板(ban)、挡油阱等，也能达到(dao)清洁真(zhen)空要求(qiu)。　　

　　3.真(zhen)空(kong)泵排出来的(de)油蒸气(qi)(qi)对环(huan)境的(de)影(ying)响如(ru)(ru)何。如(ru)(ru)果环(huan)境不允许有污染，可以(yi)选无油真(zhen)空(kong)泵如(ru)(ru)水环(huan)式真(zhen)空(kong)泵，或者把油蒸气(qi)(qi)排到室(shi)外。　　

　　4.如有多台大型水环式真空(kong)泵(beng)同时(shi)(shi)工作，循环液应该进行冷(leng)却(que)，否则影(ying)响真空(kong)度。冷(leng)却(que)装置可(ke)以配备(bei)冷(leng)却(que)塔，同时(shi)(shi)须配增压泵(beng)对管路加压。　

　　5.真(zhen)空(kong)泵(beng)的(de)工(gong)作压强(qiang)(qiang)应该满(man)足(zu)真(zhen)空(kong)设(she)备的(de)极限真(zhen)空(kong)及工(gong)作压强(qiang)(qiang)要(yao)求。通常(chang)选择真(zhen)空(kong)泵(beng)泵(beng)的(de)真(zhen)空(kong)度(du)要(yao)高于真(zhen)空(kong)设(she)备真(zhen)空(kong)度(du)半个(ge)到(dao)一个(ge)数量级。　

　　6.真(zhen)空泵在其工作压(ya)强(qiang)下，应能排走(zou)真(zhen)空设备工艺过程中产生(sheng)的全部气体量(liang)。

它具有结构简单、操作容易、维(wei)护方便、不会污染环境等优(you)点。无油真(zhen)空泵耐用性好(hao)，是抽真(zhen)空，压(ya)缩(suo)，两用真(zhen)空泵，是一种应用范围非常广(guang)泛获得真(zhen)空的基本设备。

无油(you)真(zhen)空(kong)泵与油(you)泵相比真(zhen)空(kong)度低(di)，抽(chou)气量小，但体积小巧(qiao)，易(yi)于(yu)安装，维护简(jian)单，移(yi)动方(fang)便(bian)，不产生油(you)烟(yan)，不污染环(huan)境，尤其在(zai)要求较(jiao)高的(de)实(shi)验室使用较(jiao)好。也是实(shi)验室最(zui)常(chang)备的(de)设备之一。

因此(ci)在(zai)选购无(wu)(wu)油真(zhen)(zhen)空(kong)泵(beng)(beng)时要(yao)先(xian)确定要(yao)求(qiu)工作的(de)(de)(de)真(zhen)(zhen)空(kong)度(du)(du)，如(ru)果(guo)需(xu)(xu)求(qiu)的(de)(de)(de)真(zhen)(zhen)度(du)(du)高(gao)，而选的(de)(de)(de)真(zhen)(zhen)空(kong)泵(beng)(beng)就(jiu)要(yao)高(gao)于需(xu)(xu)求(qiu)的(de)(de)(de)真(zhen)(zhen)空(kong)度(du)(du)，否则达(da)不到(dao)抽真(zhen)(zhen)空(kong)的(de)(de)(de)要(yao)求(qiu)，就(jiu)会达(da)不到(dao)工作要(yao)求(qiu)。其次是无(wu)(wu)油真(zhen)(zhen)空(kong)泵(beng)(beng)抽气(qi)速(su)率，选型时就(jiu)要(yao)稍大于所(suo)需(xu)(xu)求(qiu)的(de)(de)(de)抽气(qi)速(su)率，这样就(jiu)能更(geng)好的(de)(de)(de)满足(zu)需(xu)(xu)要(yao)。最(zui)后看抽取的(de)(de)(de)气(qi)体有(you)无(wu)(wu)腐(fu)蚀性，有(you)腐(fu)蚀的(de)(de)(de)气(qi)体会腐(fu)蚀泵(beng)(beng)，必须要(yao)用特殊的(de)(de)(de)材质才能满足(zu)需(xu)(xu)求(qiu)。