无油式真空泵是一种旋(xuan)转(zhuan)式变容(rong)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)须有(you)前级泵(beng)(beng)配合(he)方可使(shi)用在(zai)较宽的压力(li)范(fan)围(wei)内有(you)较大的抽(chou)速对(dui)被抽(chou)除气(qi)体(ti)中含有(you)灰(hui)尘和水(shui)(shui)蒸汽不敏感广泛用于冶金、化工、食品、电(dian)子镀膜等行业(ye)。主要有(you)WLW系列立式无(wu)油真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)、W型(xing)(xing)(xing)(xing)往复(fu)式真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)、2X,2XZ型(xing)(xing)(xing)(xing)旋(xuan)片式真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)、ZJ，ZJH型(xing)(xing)(xing)(xing)罗(luo)(luo)茨真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)（ZJH型(xing)(xing)(xing)(xing)为专利产真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)品）、2SK、SK型(xing)(xing)(xing)(xing)水(shui)(shui)环(huan)式真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)、2BV、2BA型(xing)(xing)(xing)(xing)水(shui)(shui)环(huan)式真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)、H、2H型(xing)(xing)(xing)(xing)滑(hua)阀真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)、TLZ型(xing)(xing)(xing)(xing)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)、SL型(xing)(xing)(xing)(xing)罗(luo)(luo)茨鼓风机(ji)(ji)、JZJHX型(xing)(xing)(xing)(xing)罗(luo)(luo)茨旋(xuan)片真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)、JZJHS型(xing)(xing)(xing)(xing)罗(luo)(luo)茨水(shui)(shui)环(huan)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)、JZJHWLW型(xing)(xing)(xing)(xing)立式无(wu)油真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)、JZJP型(xing)(xing)(xing)(xing)罗(luo)(luo)茨水(shui)(shui)喷(pen)射(she)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机(ji)(ji)组(zu)、JZJHBA型(xing)(xing)(xing)(xing)罗(luo)(luo)茨水(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)喷(pen)射(she)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)、JZJH2H型(xing)(xing)(xing)(xing)罗(luo)(luo)茨滑(hua)阀式真(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(ying)(ying)该(gai)充分了解被抽气(qi)体成分。如气(qi)体中含不含可(ke)凝蒸(zheng)气(qi)、有(you)(you)无颗(ke)粒(li)灰(hui)尘、有(you)(you)无腐(fu)蚀性(xing)、爆(bao)炸性(xing)等(deng)。如果(guo)气(qi)体中含有(you)(you)蒸(zheng)气(qi)、颗(ke)粒(li)、及腐(fu)蚀性(xing)气(qi)体，应(ying)(ying)该(gai)考虑在泵的进气(qi)口管(guan)路(lu)上安装(zhuang)辅助设备，如冷(leng)凝器(qi)、除(chu)尘器(qi)等(deng)。如抽取气(qi)体还有(you)(you)腐(fu)蚀性(xing)，则(ze)须选用(yong)材质。若抽取的气(qi)体具有(you)(you)爆(bao)炸性(xing)，则(ze)应(ying)(ying)该(gai)选择水环(huan)式真(zhen)(zhen)空(kong)泵并且配防爆(bao)电机，因为水环(huan)式真(zhen)(zhen)空(kong)泵整个工作过程(cheng)是(shi)等(deng)温的。　　

　　2.真(zhen)空设(she)备(bei)或者(zhe)零部件(jian)对(dui)油污染的要求(qiu)(qiu)。若设(she)备(bei)严(yan)格要求(qiu)(qiu)无油时，应(ying)该选各种(zhong)无油泵(beng)，如：水环式(shi)真(zhen)空泵(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)(qiu)不(bu)严(yan)格，可(ke)以选择有(you)油泵(beng)，并且加(jia)上一些防(fang)油污染措施，如加(jia)冷阱(jing)、障(zhang)板、挡油阱(jing)等，也能达到清洁(jie)真(zhen)空要求(qiu)(qiu)。　　

　　3.真(zhen)空(kong)泵(beng)排出来的油蒸(zheng)气对环(huan)境(jing)的影响如(ru)(ru)何。如(ru)(ru)果环(huan)境(jing)不(bu)允许有污(wu)染，可(ke)以选(xuan)无油真(zhen)空(kong)泵(beng)如(ru)(ru)水环(huan)式真(zhen)空(kong)泵(beng)，或者把(ba)油蒸(zheng)气排到(dao)室外(wai)。　　

　　4.如(ru)有多台大型水环式真(zhen)空泵同(tong)时工作，循(xun)环液应该(gai)进(jin)行(xing)冷(leng)却，否(fou)则影响真(zhen)空度。冷(leng)却装置可以配备冷(leng)却塔，同(tong)时须配增(zeng)压(ya)泵对管(guan)路加压(ya)。　

　　5.真(zhen)空泵(beng)的工作压强应该满足真(zhen)空设(she)备的极限真(zhen)空及工作压强要求。通常选择(ze)真(zhen)空泵(beng)泵(beng)的真(zhen)空度要高(gao)于真(zhen)空设(she)备真(zhen)空度半个到一个数量级。　

　　6.真(zhen)空(kong)泵在其(qi)工(gong)作(zuo)压强下(xia)，应能排走真(zhen)空(kong)设备工(gong)艺过程中(zhong)产生(sheng)的全(quan)部气体量(liang)。

它具有结(jie)构简(jian)单、操(cao)作容(rong)易、维护方便、不会污染环(huan)境等优(you)点(dian)。无油真空泵耐用性好，是抽真空，压缩(suo)，两用真空泵，是一种应用范(fan)围非(fei)常广泛获得真空的基本(ben)设备。

无油真(zhen)空泵(beng)(beng)与油泵(beng)(beng)相(xiang)比真(zhen)空度低，抽气(qi)量小(xiao)，但体积小(xiao)巧，易于安装，维护(hu)简单，移动方便(bian)，不(bu)产生油烟，不(bu)污染(ran)环境，尤(you)其在要(yao)求较(jiao)(jiao)高的实验室使用较(jiao)(jiao)好。也是(shi)实验室最常(chang)备(bei)的设备(bei)之一。

因此在选购无(wu)油真(zhen)(zhen)空(kong)(kong)泵时要(yao)先确(que)定要(yao)求(qiu)(qiu)工(gong)作的(de)(de)真(zhen)(zhen)空(kong)(kong)度(du)，如果需(xu)(xu)求(qiu)(qiu)的(de)(de)真(zhen)(zhen)度(du)高(gao)，而选的(de)(de)真(zhen)(zhen)空(kong)(kong)泵就(jiu)要(yao)高(gao)于(yu)需(xu)(xu)求(qiu)(qiu)的(de)(de)真(zhen)(zhen)空(kong)(kong)度(du)，否(fou)则达(da)不到抽真(zhen)(zhen)空(kong)(kong)的(de)(de)要(yao)求(qiu)(qiu)，就(jiu)会达(da)不到工(gong)作要(yao)求(qiu)(qiu)。其次是无(wu)油真(zhen)(zhen)空(kong)(kong)泵抽气速率，选型时就(jiu)要(yao)稍(shao)大于(yu)所需(xu)(xu)求(qiu)(qiu)的(de)(de)抽气速率，这样就(jiu)能(neng)更(geng)好的(de)(de)满足需(xu)(xu)要(yao)。最后看抽取的(de)(de)气体有无(wu)腐蚀性，有腐蚀的(de)(de)气体会腐蚀泵，必须(xu)要(yao)用特殊的(de)(de)材质才能(neng)满足需(xu)(xu)求(qiu)(qiu)。