无油式真空泵是一种旋转式(shi)变容真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵须有(you)前级泵配合方可使用在较(jiao)(jiao)宽的(de)压力范围内有(you)较(jiao)(jiao)大的(de)抽(chou)速对被抽(chou)除(chu)气体中含有(you)灰尘和水蒸汽不敏感广泛用于(yu)冶金、化工、食品、电子镀膜等行业。主要有(you)WLW系列立(li)式(shi)无油真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵、W型(xing)(xing)(xing)(xing)(xing)(xing)往复式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵、2X,2XZ型(xing)(xing)(xing)(xing)(xing)(xing)旋片(pian)式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵、ZJ，ZJH型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)茨(ci)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵（ZJH型(xing)(xing)(xing)(xing)(xing)(xing)为专利产真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵品）、2SK、SK型(xing)(xing)(xing)(xing)(xing)(xing)水环式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵、2BV、2BA型(xing)(xing)(xing)(xing)(xing)(xing)水环式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵、H、2H型(xing)(xing)(xing)(xing)(xing)(xing)滑(hua)阀(fa)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵、TLZ型(xing)(xing)(xing)(xing)(xing)(xing)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵、SL型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)茨(ci)鼓(gu)风机(ji)(ji)(ji)、JZJHX型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)茨(ci)旋片(pian)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)(ji)组(zu)、JZJHS型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)茨(ci)水环真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)(ji)组(zu)、JZJHWLW型(xing)(xing)(xing)(xing)(xing)(xing)立(li)式(shi)无油真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)(ji)组(zu)、JZJP型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)茨(ci)水喷(pen)射(she)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)(ji)组(zu)、JZJHBA型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)茨(ci)水环真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)(ji)组(zu)、RPP型(xing)(xing)(xing)(xing)(xing)(xing)水喷(pen)射(she)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵、JZJH2H型(xing)(xing)(xing)(xing)(xing)(xing)罗(luo)茨(ci)滑(hua)阀(fa)式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)(ji)组(zu)等型(xing)(xing)(xing)(xing)(xing)(xing)号。　　

　　工作原理：　

　　1.首先应(ying)该充分了解被抽(chou)(chou)气(qi)体成分。如(ru)气(qi)体中含(han)不含(han)可凝蒸气(qi)、有无颗粒(li)灰尘(chen)、有无腐蚀性(xing)、爆炸性(xing)等。如(ru)果气(qi)体中含(han)有蒸气(qi)、颗粒(li)、及腐蚀性(xing)气(qi)体，应(ying)该考虑(lv)在泵的进气(qi)口管路上安装辅助设备，如(ru)冷凝器、除尘(chen)器等。如(ru)抽(chou)(chou)取气(qi)体还有腐蚀性(xing)，则须选用(yong)材(cai)质(zhi)。若抽(chou)(chou)取的气(qi)体具有爆炸性(xing)，则应(ying)该选择水环式(shi)(shi)真(zhen)空泵并且(qie)配防爆电(dian)机，因(yin)为水环式(shi)(shi)真(zhen)空泵整个工作过(guo)程是等温的。　　

　　2.真空设(she)备或者零(ling)部件对油(you)(you)污(wu)染的要求(qiu)。若设(she)备严格要求(qiu)无(wu)油(you)(you)时(shi)，应该选各种无(wu)油(you)(you)泵(beng)(beng)，如(ru)：水环式真空泵(beng)(beng)、分子(zi)筛吸附泵(beng)(beng)、溅(jian)射离子(zi)泵(beng)(beng)、低温泵(beng)(beng)等。若要求(qiu)不严格，可以选择有油(you)(you)泵(beng)(beng)，并且加上(shang)一(yi)些防油(you)(you)污(wu)染措(cuo)施，如(ru)加冷(leng)阱、障板、挡油(you)(you)阱等，也(ye)能达到清洁(jie)真空要求(qiu)。　　

　　3.真空(kong)泵(beng)排出来的油(you)蒸气对环境的影响如(ru)(ru)何。如(ru)(ru)果(guo)环境不允许有(you)污染，可以选无油(you)真空(kong)泵(beng)如(ru)(ru)水环式真空(kong)泵(beng)，或(huo)者把(ba)油(you)蒸气排到室(shi)外。　　

　　4.如有多(duo)台大型水环(huan)式真空(kong)(kong)泵同时工作(zuo)，循环(huan)液应该进行冷却(que)(que)，否(fou)则影(ying)响真空(kong)(kong)度。冷却(que)(que)装置可以配备冷却(que)(que)塔，同时须配增压泵对(dui)管路(lu)加压。　

　　5.真(zhen)空(kong)泵(beng)的工作压强(qiang)应该满足(zu)真(zhen)空(kong)设备(bei)的极(ji)限真(zhen)空(kong)及工作压强(qiang)要(yao)求。通(tong)常选(xuan)择真(zhen)空(kong)泵(beng)泵(beng)的真(zhen)空(kong)度要(yao)高于真(zhen)空(kong)设备(bei)真(zhen)空(kong)度半个(ge)到一个(ge)数(shu)量级。　

　　6.真(zhen)空泵在其工(gong)作(zuo)压(ya)强下，应能排走真(zhen)空设备(bei)工(gong)艺过(guo)程(cheng)中(zhong)产(chan)生的(de)全部气体量。

它具(ju)有结构简单、操作容(rong)易(yi)、维(wei)护方便、不(bu)会污染环境等优(you)点。无(wu)油(you)真(zhen)(zhen)空泵耐用性好，是抽真(zhen)(zhen)空，压缩，两用真(zhen)(zhen)空泵，是一种应用范围(wei)非常广泛获得(de)真(zhen)(zhen)空的基(ji)本(ben)设备。

无(wu)油真空泵(beng)与油泵(beng)相比真空度低，抽气(qi)量小，但体积(ji)小巧，易于安装，维护简(jian)单，移动方(fang)便(bian)，不产生油烟，不污(wu)染环境，尤其(qi)在要求(qiu)较高的(de)实验室使(shi)用较好(hao)。也是实验室最常(chang)备的(de)设备之一。

因此在(zai)选购(gou)无(wu)油真空(kong)泵(beng)(beng)时要(yao)先确定要(yao)求(qiu)(qiu)工(gong)作(zuo)的(de)(de)真空(kong)度，如果(guo)需(xu)(xu)(xu)求(qiu)(qiu)的(de)(de)真度高，而选的(de)(de)真空(kong)泵(beng)(beng)就(jiu)要(yao)高于需(xu)(xu)(xu)求(qiu)(qiu)的(de)(de)真空(kong)度，否则达不(bu)到(dao)抽真空(kong)的(de)(de)要(yao)求(qiu)(qiu)，就(jiu)会(hui)达不(bu)到(dao)工(gong)作(zuo)要(yao)求(qiu)(qiu)。其(qi)次是无(wu)油真空(kong)泵(beng)(beng)抽气(qi)(qi)速率(lv)，选型时就(jiu)要(yao)稍(shao)大(da)于所需(xu)(xu)(xu)求(qiu)(qiu)的(de)(de)抽气(qi)(qi)速率(lv)，这样(yang)就(jiu)能更好的(de)(de)满(man)足需(xu)(xu)(xu)要(yao)。最(zui)后(hou)看抽取的(de)(de)气(qi)(qi)体有无(wu)腐蚀性，有腐蚀的(de)(de)气(qi)(qi)体会(hui)腐蚀泵(beng)(beng)，必须要(yao)用(yong)特殊的(de)(de)材质才(cai)能满(man)足需(xu)(xu)(xu)求(qiu)(qiu)。