无油式真空泵是(shi)一(yi)种旋转式(shi)(shi)变容真(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)须有(you)前级泵(beng)(beng)(beng)配合(he)方可使用在较(jiao)宽的压力范(fan)围(wei)内有(you)较(jiao)大的抽速(su)对(dui)被(bei)抽除气(qi)体中(zhong)含有(you)灰尘(chen)和(he)水(shui)蒸汽不(bu)敏感广泛用于(yu)冶(ye)金、化工(gong)、食品、电(dian)子镀膜等行业。主(zhu)要有(you)WLW系列(lie)立式(shi)(shi)无油(you)真(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、W型(xing)(xing)(xing)往复式(shi)(shi)真(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2X,2XZ型(xing)(xing)(xing)旋片式(shi)(shi)真(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、ZJ，ZJH型(xing)(xing)(xing)罗茨(ci)(ci)(ci)真(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)（ZJH型(xing)(xing)(xing)为专利(li)产(chan)真(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)品）、2SK、SK型(xing)(xing)(xing)水(shui)环(huan)式(shi)(shi)真(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2BV、2BA型(xing)(xing)(xing)水(shui)环(huan)式(shi)(shi)真(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、H、2H型(xing)(xing)(xing)滑阀(fa)真(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、TLZ型(xing)(xing)(xing)真(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、SL型(xing)(xing)(xing)罗茨(ci)(ci)(ci)鼓风机(ji)、JZJHX型(xing)(xing)(xing)罗茨(ci)(ci)(ci)旋片真(zhen)空(kong)(kong)(kong)(kong)机(ji)组、JZJHS型(xing)(xing)(xing)罗茨(ci)(ci)(ci)水(shui)环(huan)真(zhen)空(kong)(kong)(kong)(kong)机(ji)组、JZJHWLW型(xing)(xing)(xing)立式(shi)(shi)无油(you)真(zhen)空(kong)(kong)(kong)(kong)机(ji)组、JZJP型(xing)(xing)(xing)罗茨(ci)(ci)(ci)水(shui)喷射(she)真(zhen)空(kong)(kong)(kong)(kong)机(ji)组、JZJHBA型(xing)(xing)(xing)罗茨(ci)(ci)(ci)水(shui)环(huan)真(zhen)空(kong)(kong)(kong)(kong)机(ji)组、RPP型(xing)(xing)(xing)水(shui)喷射(she)真(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、JZJH2H型(xing)(xing)(xing)罗茨(ci)(ci)(ci)滑阀(fa)式(shi)(shi)真(zhen)空(kong)(kong)(kong)(kong)机(ji)组等型(xing)(xing)(xing)号(hao)。　　

　　工作原理：　

　　1.首先应该充分(fen)了解被抽(chou)(chou)气(qi)(qi)(qi)体成分(fen)。如气(qi)(qi)(qi)体中(zhong)含不含可凝蒸气(qi)(qi)(qi)、有(you)(you)无颗粒灰尘、有(you)(you)无腐(fu)蚀性(xing)、爆炸性(xing)等。如果(guo)气(qi)(qi)(qi)体中(zhong)含有(you)(you)蒸气(qi)(qi)(qi)、颗粒、及腐(fu)蚀性(xing)气(qi)(qi)(qi)体，应该考虑在(zai)泵(beng)的(de)进气(qi)(qi)(qi)口(kou)管(guan)路上安装辅(fu)助设备，如冷凝器(qi)(qi)、除尘器(qi)(qi)等。如抽(chou)(chou)取气(qi)(qi)(qi)体还(hai)有(you)(you)腐(fu)蚀性(xing)，则须选(xuan)用材(cai)质。若抽(chou)(chou)取的(de)气(qi)(qi)(qi)体具有(you)(you)爆炸性(xing)，则应该选(xuan)择(ze)水环(huan)式真空泵(beng)并且配防(fang)爆电机(ji)，因(yin)为水环(huan)式真空泵(beng)整个工作过程是等温的(de)。　　

　　2.真(zhen)空(kong)设备或者零部件对油(you)(you)污染(ran)(ran)的要求。若(ruo)设备严格要求无(wu)油(you)(you)时，应该选(xuan)各(ge)种无(wu)油(you)(you)泵(beng)，如：水(shui)环式真(zhen)空(kong)泵(beng)、分(fen)子筛吸附(fu)泵(beng)、溅射离子泵(beng)、低温泵(beng)等(deng)。若(ruo)要求不严格，可(ke)以选(xuan)择有油(you)(you)泵(beng)，并(bing)且加上一些防油(you)(you)污染(ran)(ran)措施，如加冷阱、障板、挡油(you)(you)阱等(deng)，也能达到清洁真(zhen)空(kong)要求。　　

　　3.真(zhen)空(kong)泵(beng)(beng)(beng)排出来(lai)的油蒸气对环境(jing)的影响如(ru)何(he)。如(ru)果(guo)环境(jing)不允许有污(wu)染，可(ke)以选无油真(zhen)空(kong)泵(beng)(beng)(beng)如(ru)水环式真(zhen)空(kong)泵(beng)(beng)(beng)，或(huo)者把油蒸气排到室(shi)外。　　

　　4.如有多台(tai)大型水环(huan)式(shi)真(zhen)空(kong)泵(beng)同(tong)时(shi)工作(zuo)，循环(huan)液应该(gai)进(jin)行冷(leng)(leng)却(que)，否则影响真(zhen)空(kong)度。冷(leng)(leng)却(que)装置可(ke)以配(pei)备冷(leng)(leng)却(que)塔，同(tong)时(shi)须配(pei)增压泵(beng)对管(guan)路加压。　

　　5.真(zhen)(zhen)(zhen)(zhen)空(kong)泵(beng)的工(gong)作压强应该满足真(zhen)(zhen)(zhen)(zhen)空(kong)设(she)备(bei)的极限真(zhen)(zhen)(zhen)(zhen)空(kong)及工(gong)作压强要求。通常选择真(zhen)(zhen)(zhen)(zhen)空(kong)泵(beng)泵(beng)的真(zhen)(zhen)(zhen)(zhen)空(kong)度要高于真(zhen)(zhen)(zhen)(zhen)空(kong)设(she)备(bei)真(zhen)(zhen)(zhen)(zhen)空(kong)度半个到一个数量级。　

　　6.真(zhen)空泵在其工作压强下(xia)，应(ying)能排走真(zhen)空设(she)备工艺过(guo)程中(zhong)产生的全部气体(ti)量。

它具有(you)结构简单、操作(zuo)容易、维护方(fang)便、不会(hui)污染环境等(deng)优点。无油真空(kong)泵耐(nai)用(yong)性好，是抽真空(kong)，压缩，两(liang)用(yong)真空(kong)泵，是一(yi)种应用(yong)范(fan)围非(fei)常广泛获得真空(kong)的基本设备。

无(wu)油(you)真空泵与(yu)油(you)泵相比真空度低(di)，抽气量小(xiao)，但体积小(xiao)巧(qiao)，易于安(an)装，维护简单，移(yi)动(dong)方便，不(bu)(bu)产生油(you)烟(yan)，不(bu)(bu)污染环境(jing)，尤其在要求较高的实验室(shi)使用(yong)较好。也是实验室(shi)最(zui)常备(bei)的设备(bei)之(zhi)一。

因此在选(xuan)购无(wu)油真(zhen)空(kong)泵(beng)时要(yao)(yao)先确定要(yao)(yao)求工(gong)作的(de)(de)(de)真(zhen)空(kong)度(du)，如果需(xu)(xu)求的(de)(de)(de)真(zhen)度(du)高，而选(xuan)的(de)(de)(de)真(zhen)空(kong)泵(beng)就要(yao)(yao)高于(yu)需(xu)(xu)求的(de)(de)(de)真(zhen)空(kong)度(du)，否则达不到抽真(zhen)空(kong)的(de)(de)(de)要(yao)(yao)求，就会达不到工(gong)作要(yao)(yao)求。其次是(shi)无(wu)油真(zhen)空(kong)泵(beng)抽气(qi)速率(lv)，选(xuan)型时就要(yao)(yao)稍大(da)于(yu)所(suo)需(xu)(xu)求的(de)(de)(de)抽气(qi)速率(lv)，这样就能(neng)更好的(de)(de)(de)满足需(xu)(xu)要(yao)(yao)。最后看抽取的(de)(de)(de)气(qi)体有(you)无(wu)腐(fu)(fu)蚀性，有(you)腐(fu)(fu)蚀的(de)(de)(de)气(qi)体会腐(fu)(fu)蚀泵(beng)，必须要(yao)(yao)用特殊的(de)(de)(de)材质才能(neng)满足需(xu)(xu)求。