无油式真空泵是一(yi)种(zhong)旋(xuan)转式(shi)变容真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)须(xu)有(you)前级泵(beng)(beng)(beng)(beng)(beng)配(pei)合方可使用在较宽的(de)压力范围(wei)内有(you)较大的(de)抽速对(dui)被抽除气体(ti)中含有(you)灰尘和水(shui)蒸(zheng)汽(qi)不敏(min)感广泛(fan)用于冶金、化工(gong)、食(shi)品、电子(zi)镀膜等(deng)行业。主要有(you)WLW系(xi)列立(li)式(shi)无(wu)油(you)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、W型(xing)(xing)(xing)往复式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、2X,2XZ型(xing)(xing)(xing)旋(xuan)片式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、ZJ，ZJH型(xing)(xing)(xing)罗(luo)(luo)茨(ci)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)（ZJH型(xing)(xing)(xing)为专利产真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)品）、2SK、SK型(xing)(xing)(xing)水(shui)环式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、2BV、2BA型(xing)(xing)(xing)水(shui)环式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、H、2H型(xing)(xing)(xing)滑阀真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、TLZ型(xing)(xing)(xing)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、SL型(xing)(xing)(xing)罗(luo)(luo)茨(ci)鼓风机(ji)(ji)(ji)、JZJHX型(xing)(xing)(xing)罗(luo)(luo)茨(ci)旋(xuan)片真(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)(ji)组、JZJHS型(xing)(xing)(xing)罗(luo)(luo)茨(ci)水(shui)环真(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)(ji)组、JZJHWLW型(xing)(xing)(xing)立(li)式(shi)无(wu)油(you)真(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)(ji)组、JZJP型(xing)(xing)(xing)罗(luo)(luo)茨(ci)水(shui)喷射(she)真(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)(ji)组、JZJHBA型(xing)(xing)(xing)罗(luo)(luo)茨(ci)水(shui)环真(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)(ji)组、RPP型(xing)(xing)(xing)水(shui)喷射(she)真(zhen)(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、JZJH2H型(xing)(xing)(xing)罗(luo)(luo)茨(ci)滑阀式(shi)真(zhen)(zhen)(zhen)空(kong)(kong)机(ji)(ji)(ji)组等(deng)型(xing)(xing)(xing)号。　　

　　工作原理：　

　　1.首先(xian)应(ying)(ying)该(gai)充(chong)分了(le)解被抽气(qi)体(ti)成分。如气(qi)体(ti)中(zhong)含(han)不含(han)可凝蒸气(qi)、有无颗(ke)粒(li)灰尘、有无腐(fu)蚀(shi)性(xing)(xing)、爆(bao)炸性(xing)(xing)等(deng)。如果气(qi)体(ti)中(zhong)含(han)有蒸气(qi)、颗(ke)粒(li)、及腐(fu)蚀(shi)性(xing)(xing)气(qi)体(ti)，应(ying)(ying)该(gai)考虑(lv)在(zai)泵的进气(qi)口管路(lu)上安装辅(fu)助设备(bei)，如冷凝器(qi)、除尘器(qi)等(deng)。如抽取气(qi)体(ti)还有腐(fu)蚀(shi)性(xing)(xing)，则须(xu)选用(yong)材质。若抽取的气(qi)体(ti)具有爆(bao)炸性(xing)(xing)，则应(ying)(ying)该(gai)选择(ze)水(shui)环式真(zhen)(zhen)空泵并且配防爆(bao)电机，因为水(shui)环式真(zhen)(zhen)空泵整个工作过(guo)程是等(deng)温的。　　

　　2.真(zhen)空设备(bei)或者零部件对油(you)(you)(you)污(wu)染(ran)的要(yao)求。若设备(bei)严格要(yao)求无油(you)(you)(you)时，应该选各种无油(you)(you)(you)泵，如(ru)：水环式真(zhen)空泵、分子(zi)(zi)筛吸附泵、溅射离子(zi)(zi)泵、低温泵等(deng)(deng)。若要(yao)求不严格，可以选择有(you)油(you)(you)(you)泵，并且加上一些防油(you)(you)(you)污(wu)染(ran)措施，如(ru)加冷(leng)阱、障板、挡油(you)(you)(you)阱等(deng)(deng)，也能达到清洁真(zhen)空要(yao)求。　　

　　3.真空泵排出来的油(you)(you)蒸(zheng)气对环境的影响如何。如果(guo)环境不允许有污染(ran)，可(ke)以选(xuan)无(wu)油(you)(you)真空泵如水环式(shi)真空泵，或者把油(you)(you)蒸(zheng)气排到室外。　　

　　4.如有(you)多台大(da)型水(shui)环式真空泵(beng)同(tong)时工作，循环液应(ying)该进行冷(leng)却，否则影响真空度。冷(leng)却装置(zhi)可以配备冷(leng)却塔，同(tong)时须配增(zeng)压泵(beng)对(dui)管(guan)路加压。　

　　5.真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)的(de)工作(zuo)压(ya)强应(ying)该满(man)足真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)设备的(de)极限真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)及(ji)工作(zuo)压(ya)强要求(qiu)。通常选(xuan)择真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)泵(beng)(beng)的(de)真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)度(du)要高于真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)设备真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)度(du)半个到一个数量级。　

　　6.真空泵(beng)在其工作压强下，应能排走真空设备工艺(yi)过程中产生的全(quan)部气体(ti)量。

它具有结构简单、操作容易、维护方(fang)便、不会污染环境等优点。无油真空泵耐用性(xing)好，是抽(chou)真空，压(ya)缩，两用真空泵，是一(yi)种应(ying)用范围非常广泛获(huo)得(de)真空的基(ji)本设备。

无油(you)真空泵与油(you)泵相(xiang)比真空度低，抽(chou)气量(liang)小，但体积小巧，易于安(an)装，维护简单，移动方便(bian)，不产生油(you)烟，不污染环境，尤(you)其在要(yao)求(qiu)较高的实验室使用较好。也(ye)是实验室最(zui)常备(bei)的设备(bei)之一。

因此在选(xuan)购无(wu)油真(zhen)空(kong)泵时要(yao)先(xian)确(que)定要(yao)求工作的(de)真(zhen)空(kong)度，如(ru)果需(xu)(xu)求的(de)真(zhen)度高(gao)，而选(xuan)的(de)真(zhen)空(kong)泵就(jiu)要(yao)高(gao)于需(xu)(xu)求的(de)真(zhen)空(kong)度，否(fou)则达不到(dao)抽真(zhen)空(kong)的(de)要(yao)求，就(jiu)会(hui)达不到(dao)工作要(yao)求。其(qi)次是无(wu)油真(zhen)空(kong)泵抽气(qi)速率(lv)(lv)，选(xuan)型时就(jiu)要(yao)稍大于所需(xu)(xu)求的(de)抽气(qi)速率(lv)(lv)，这样(yang)就(jiu)能更好的(de)满足(zu)需(xu)(xu)要(yao)。最后看抽取(qu)的(de)气(qi)体有无(wu)腐(fu)(fu)蚀性，有腐(fu)(fu)蚀的(de)气(qi)体会(hui)腐(fu)(fu)蚀泵，必须要(yao)用特殊的(de)材质才能满足(zu)需(xu)(xu)求。