无油式真空泵是一种旋(xuan)转式(shi)(shi)变容真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)须有前(qian)级泵(beng)(beng)(beng)配合方可使用(yong)在较宽的(de)压力范围内有较大的(de)抽速对被(bei)抽除气体中含有灰尘和(he)水(shui)(shui)蒸汽不敏感广泛用(yong)于(yu)冶金、化工、食品、电子镀膜(mo)等行业。主(zhu)要有WLW系列立式(shi)(shi)无油(you)(you)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、W型(xing)(xing)(xing)(xing)往复式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2X,2XZ型(xing)(xing)(xing)(xing)旋(xuan)片式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、ZJ，ZJH型(xing)(xing)(xing)(xing)罗(luo)茨(ci)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)（ZJH型(xing)(xing)(xing)(xing)为专利产真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)品）、2SK、SK型(xing)(xing)(xing)(xing)水(shui)(shui)环(huan)式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2BV、2BA型(xing)(xing)(xing)(xing)水(shui)(shui)环(huan)式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、H、2H型(xing)(xing)(xing)(xing)滑(hua)阀真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、TLZ型(xing)(xing)(xing)(xing)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、SL型(xing)(xing)(xing)(xing)罗(luo)茨(ci)鼓风机(ji)、JZJHX型(xing)(xing)(xing)(xing)罗(luo)茨(ci)旋(xuan)片真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、JZJHS型(xing)(xing)(xing)(xing)罗(luo)茨(ci)水(shui)(shui)环(huan)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、JZJHWLW型(xing)(xing)(xing)(xing)立式(shi)(shi)无油(you)(you)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、JZJP型(xing)(xing)(xing)(xing)罗(luo)茨(ci)水(shui)(shui)喷(pen)射真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、JZJHBA型(xing)(xing)(xing)(xing)罗(luo)茨(ci)水(shui)(shui)环(huan)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、RPP型(xing)(xing)(xing)(xing)水(shui)(shui)喷(pen)射真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、JZJH2H型(xing)(xing)(xing)(xing)罗(luo)茨(ci)滑(hua)阀式(shi)(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)等型(xing)(xing)(xing)(xing)号(hao)。　　

　　工作原理：　

　　1.首先应该(gai)充分(fen)了解(jie)被抽(chou)气(qi)(qi)(qi)(qi)体成分(fen)。如(ru)气(qi)(qi)(qi)(qi)体中含不含可凝(ning)(ning)蒸气(qi)(qi)(qi)(qi)、有无颗粒灰尘(chen)、有无腐蚀性、爆炸(zha)性等(deng)。如(ru)果(guo)气(qi)(qi)(qi)(qi)体中含有蒸气(qi)(qi)(qi)(qi)、颗粒、及腐蚀性气(qi)(qi)(qi)(qi)体，应该(gai)考(kao)虑在泵(beng)的进气(qi)(qi)(qi)(qi)口管路(lu)上安(an)装辅(fu)助(zhu)设备，如(ru)冷凝(ning)(ning)器(qi)、除尘(chen)器(qi)等(deng)。如(ru)抽(chou)取气(qi)(qi)(qi)(qi)体还有腐蚀性，则(ze)须选用材质。若抽(chou)取的气(qi)(qi)(qi)(qi)体具有爆炸(zha)性，则(ze)应该(gai)选择水环式(shi)真空(kong)泵(beng)并且配防爆电机，因为(wei)水环式(shi)真空(kong)泵(beng)整个工(gong)作过程(cheng)是等(deng)温的。　　

　　2.真(zhen)空(kong)设(she)备或者零部件对油(you)污染(ran)的要求(qiu)。若设(she)备严格(ge)要求(qiu)无油(you)时(shi)，应该选各(ge)种(zhong)无油(you)泵(beng)，如：水环式真(zhen)空(kong)泵(beng)、分子(zi)筛吸附(fu)泵(beng)、溅射离子(zi)泵(beng)、低温泵(beng)等。若要求(qiu)不严格(ge)，可以选择有(you)油(you)泵(beng)，并(bing)且加上(shang)一些防油(you)污染(ran)措施，如加冷阱、障板(ban)、挡油(you)阱等，也能达(da)到清洁真(zhen)空(kong)要求(qiu)。　　

　　3.真空(kong)(kong)泵排出来(lai)的油蒸(zheng)气(qi)对环境(jing)的影响如何。如果环境(jing)不允(yun)许有(you)污染，可以选无油真空(kong)(kong)泵如水环式真空(kong)(kong)泵，或者把油蒸(zheng)气(qi)排到室外。　　

　　4.如有多台大型水环(huan)式(shi)真空(kong)泵(beng)同(tong)时工(gong)作，循环(huan)液应该进行冷(leng)却(que)，否则(ze)影响真空(kong)度(du)。冷(leng)却(que)装置可以配(pei)备冷(leng)却(que)塔，同(tong)时须(xu)配(pei)增压泵(beng)对管路加压。　

　　5.真(zhen)(zhen)空(kong)泵(beng)(beng)的工(gong)作(zuo)(zuo)压(ya)(ya)强(qiang)应该满足真(zhen)(zhen)空(kong)设备的极限(xian)真(zhen)(zhen)空(kong)及(ji)工(gong)作(zuo)(zuo)压(ya)(ya)强(qiang)要求。通常选择真(zhen)(zhen)空(kong)泵(beng)(beng)泵(beng)(beng)的真(zhen)(zhen)空(kong)度要高于真(zhen)(zhen)空(kong)设备真(zhen)(zhen)空(kong)度半个到一(yi)个数量级。　

　　6.真空泵在其工作压强(qiang)下，应(ying)能排走(zou)真空设(she)备工艺过程中产(chan)生(sheng)的(de)全部气体量。

它具有结构简单(dan)、操作容易、维护方便、不会污(wu)染(ran)环(huan)境(jing)等优点。无(wu)油(you)真(zhen)空泵耐用(yong)性好，是(shi)抽(chou)真(zhen)空，压(ya)缩，两用(yong)真(zhen)空泵，是(shi)一种(zhong)应用(yong)范围非常广泛获得(de)真(zhen)空的基(ji)本设备。

无油真(zhen)空泵与油泵相比(bi)真(zhen)空度低(di)，抽气量小(xiao)，但(dan)体(ti)积小(xiao)巧(qiao)，易于安(an)装，维(wei)护简单，移动方(fang)便(bian)，不(bu)产生(sheng)油烟，不(bu)污染环境，尤(you)其在要求(qiu)较高(gao)的(de)实验室(shi)使用(yong)较好(hao)。也是实验室(shi)最常备的(de)设备之一。

因此在选(xuan)(xuan)购无油(you)(you)真(zhen)空(kong)(kong)泵(beng)(beng)时要(yao)(yao)先确(que)定(ding)要(yao)(yao)求工(gong)作(zuo)(zuo)的(de)(de)(de)真(zhen)空(kong)(kong)度，如果需求的(de)(de)(de)真(zhen)度高(gao)，而选(xuan)(xuan)的(de)(de)(de)真(zhen)空(kong)(kong)泵(beng)(beng)就(jiu)要(yao)(yao)高(gao)于需求的(de)(de)(de)真(zhen)空(kong)(kong)度，否则达(da)不到抽(chou)(chou)真(zhen)空(kong)(kong)的(de)(de)(de)要(yao)(yao)求，就(jiu)会(hui)达(da)不到工(gong)作(zuo)(zuo)要(yao)(yao)求。其次是无油(you)(you)真(zhen)空(kong)(kong)泵(beng)(beng)抽(chou)(chou)气速(su)率，选(xuan)(xuan)型(xing)时就(jiu)要(yao)(yao)稍大于所需求的(de)(de)(de)抽(chou)(chou)气速(su)率，这样就(jiu)能(neng)更好的(de)(de)(de)满(man)足需要(yao)(yao)。最后看抽(chou)(chou)取的(de)(de)(de)气体有无腐蚀(shi)性(xing)，有腐蚀(shi)的(de)(de)(de)气体会(hui)腐蚀(shi)泵(beng)(beng)，必(bi)须要(yao)(yao)用特殊的(de)(de)(de)材质才能(neng)满(man)足需求。