无油式真空泵是一种(zhong)旋转式(shi)(shi)(shi)变(bian)容真(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)须有(you)前级(ji)泵(beng)(beng)配合方可使用在较宽的压力范(fan)围内(nei)有(you)较大的抽速(su)对被(bei)抽除气体中含有(you)灰尘和水(shui)蒸(zheng)汽不敏感(gan)广泛用于(yu)冶金、化工、食品、电子(zi)镀(du)膜等行业。主要有(you)WLW系列立(li)式(shi)(shi)(shi)无油真(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、W型(xing)(xing)(xing)往复式(shi)(shi)(shi)真(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、2X,2XZ型(xing)(xing)(xing)旋片(pian)(pian)式(shi)(shi)(shi)真(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、ZJ，ZJH型(xing)(xing)(xing)罗(luo)(luo)(luo)茨(ci)(ci)真(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)（ZJH型(xing)(xing)(xing)为专利(li)产真(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)品）、2SK、SK型(xing)(xing)(xing)水(shui)环式(shi)(shi)(shi)真(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、2BV、2BA型(xing)(xing)(xing)水(shui)环式(shi)(shi)(shi)真(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、H、2H型(xing)(xing)(xing)滑(hua)阀(fa)(fa)真(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、TLZ型(xing)(xing)(xing)真(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、SL型(xing)(xing)(xing)罗(luo)(luo)(luo)茨(ci)(ci)鼓风机、JZJHX型(xing)(xing)(xing)罗(luo)(luo)(luo)茨(ci)(ci)旋片(pian)(pian)真(zhen)空(kong)(kong)(kong)(kong)(kong)机组(zu)、JZJHS型(xing)(xing)(xing)罗(luo)(luo)(luo)茨(ci)(ci)水(shui)环真(zhen)空(kong)(kong)(kong)(kong)(kong)机组(zu)、JZJHWLW型(xing)(xing)(xing)立(li)式(shi)(shi)(shi)无油真(zhen)空(kong)(kong)(kong)(kong)(kong)机组(zu)、JZJP型(xing)(xing)(xing)罗(luo)(luo)(luo)茨(ci)(ci)水(shui)喷射真(zhen)空(kong)(kong)(kong)(kong)(kong)机组(zu)、JZJHBA型(xing)(xing)(xing)罗(luo)(luo)(luo)茨(ci)(ci)水(shui)环真(zhen)空(kong)(kong)(kong)(kong)(kong)机组(zu)、RPP型(xing)(xing)(xing)水(shui)喷射真(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、JZJH2H型(xing)(xing)(xing)罗(luo)(luo)(luo)茨(ci)(ci)滑(hua)阀(fa)(fa)式(shi)(shi)(shi)真(zhen)空(kong)(kong)(kong)(kong)(kong)机组(zu)等型(xing)(xing)(xing)号。　　

　　工作原理：　

　　1.首先应该充分了解被抽(chou)气(qi)体(ti)成分。如(ru)气(qi)体(ti)中(zhong)含不含可凝蒸(zheng)(zheng)气(qi)、有(you)无颗(ke)粒灰尘、有(you)无腐(fu)蚀(shi)性、爆炸性等。如(ru)果(guo)气(qi)体(ti)中(zhong)含有(you)蒸(zheng)(zheng)气(qi)、颗(ke)粒、及(ji)腐(fu)蚀(shi)性气(qi)体(ti)，应该考虑在泵(beng)的(de)进气(qi)口管路上安(an)装辅助设备，如(ru)冷凝器、除尘器等。如(ru)抽(chou)取(qu)气(qi)体(ti)还有(you)腐(fu)蚀(shi)性，则须选(xuan)用材质。若抽(chou)取(qu)的(de)气(qi)体(ti)具有(you)爆炸性，则应该选(xuan)择水(shui)环式真空(kong)泵(beng)并(bing)且配防爆电机，因为水(shui)环式真空(kong)泵(beng)整个工作过程是等温的(de)。　　

　　2.真空设(she)备或者零部件(jian)对油(you)污染的(de)要(yao)求(qiu)。若设(she)备严格(ge)要(yao)求(qiu)无油(you)时，应该(gai)选各(ge)种无油(you)泵(beng)，如：水环式(shi)真空泵(beng)、分(fen)子(zi)筛吸附泵(beng)、溅射离子(zi)泵(beng)、低温泵(beng)等(deng)。若要(yao)求(qiu)不严格(ge)，可以选择有(you)油(you)泵(beng)，并且加上一些(xie)防油(you)污染措施，如加冷(leng)阱、障(zhang)板、挡(dang)油(you)阱等(deng)，也能达到清洁真空要(yao)求(qiu)。　　

　　3.真(zhen)空泵(beng)排(pai)出来的油蒸(zheng)(zheng)气(qi)对环(huan)(huan)境(jing)的影(ying)响如(ru)何(he)。如(ru)果(guo)环(huan)(huan)境(jing)不(bu)允许有污染，可以选无(wu)油真(zhen)空泵(beng)如(ru)水(shui)环(huan)(huan)式(shi)真(zhen)空泵(beng)，或者把(ba)油蒸(zheng)(zheng)气(qi)排(pai)到室外。　　

　　4.如有多台大型水(shui)环(huan)式真空泵同时工作，循环(huan)液应该进行冷(leng)(leng)却，否则影响真空度。冷(leng)(leng)却装置可以配备冷(leng)(leng)却塔，同时须配增压泵对管路(lu)加压。　

　　5.真空(kong)(kong)(kong)泵的工作压强应(ying)该满足真空(kong)(kong)(kong)设备的极限真空(kong)(kong)(kong)及工作压强要求。通常选择真空(kong)(kong)(kong)泵泵的真空(kong)(kong)(kong)度要高于真空(kong)(kong)(kong)设备真空(kong)(kong)(kong)度半个到一个数(shu)量级(ji)。　

　　6.真(zhen)空泵(beng)在(zai)其工(gong)作压强下(xia)，应(ying)能排走真(zhen)空设备工(gong)艺过程中产生的全部(bu)气体量。

它(ta)具有结构简单、操(cao)作容易、维(wei)护方便、不会污染(ran)环境等优点。无油真(zhen)(zhen)空泵耐(nai)用性(xing)好，是抽(chou)真(zhen)(zhen)空，压缩，两(liang)用真(zhen)(zhen)空泵，是一种应用范围非常广(guang)泛获(huo)得真(zhen)(zhen)空的基本(ben)设备。

无油(you)真空(kong)泵与(yu)油(you)泵相(xiang)比(bi)真空(kong)度低，抽(chou)气量(liang)小，但体(ti)积小巧，易于安装(zhuang)，维护简单，移动方(fang)便，不(bu)产生油(you)烟，不(bu)污染环境，尤其在(zai)要求较高的实验室使用较好。也(ye)是实验室最常备的设(she)备之一。

因此在选购(gou)无油(you)(you)真(zhen)空(kong)泵(beng)时要(yao)先确定要(yao)求(qiu)(qiu)工作的(de)(de)真(zhen)空(kong)度，如果需(xu)(xu)求(qiu)(qiu)的(de)(de)真(zhen)度高(gao)，而选的(de)(de)真(zhen)空(kong)泵(beng)就(jiu)要(yao)高(gao)于需(xu)(xu)求(qiu)(qiu)的(de)(de)真(zhen)空(kong)度，否则达(da)不到抽(chou)真(zhen)空(kong)的(de)(de)要(yao)求(qiu)(qiu)，就(jiu)会(hui)达(da)不到工作要(yao)求(qiu)(qiu)。其(qi)次是无油(you)(you)真(zhen)空(kong)泵(beng)抽(chou)气(qi)速率，选型时就(jiu)要(yao)稍大(da)于所需(xu)(xu)求(qiu)(qiu)的(de)(de)抽(chou)气(qi)速率，这样就(jiu)能更好的(de)(de)满足需(xu)(xu)要(yao)。最后看抽(chou)取的(de)(de)气(qi)体(ti)有(you)无腐蚀性，有(you)腐蚀的(de)(de)气(qi)体(ti)会(hui)腐蚀泵(beng)，必须要(yao)用(yong)特殊的(de)(de)材质才能满足需(xu)(xu)求(qiu)(qiu)。