无油式真空泵是一种旋转式(shi)变容真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)须有(you)前级泵(beng)配合方可使用在较宽的压力(li)范(fan)围(wei)内有(you)较大的抽速对被抽除气(qi)体中含有(you)灰尘和水(shui)蒸汽不敏感广泛用于冶金、化工(gong)、食品、电(dian)子镀膜(mo)等行业。主要有(you)WLW系(xi)列立(li)式(shi)无油真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)、W型(xing)(xing)(xing)(xing)(xing)(xing)往复(fu)式(shi)真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)、2X,2XZ型(xing)(xing)(xing)(xing)(xing)(xing)旋片式(shi)真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)、ZJ，ZJH型(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)(ci)真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)（ZJH型(xing)(xing)(xing)(xing)(xing)(xing)为(wei)专(zhuan)利产真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)品）、2SK、SK型(xing)(xing)(xing)(xing)(xing)(xing)水(shui)环式(shi)真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)、2BV、2BA型(xing)(xing)(xing)(xing)(xing)(xing)水(shui)环式(shi)真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)、H、2H型(xing)(xing)(xing)(xing)(xing)(xing)滑阀真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)、TLZ型(xing)(xing)(xing)(xing)(xing)(xing)真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)、SL型(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)(ci)鼓风机(ji)、JZJHX型(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)(ci)旋片真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、JZJHS型(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)(ci)水(shui)环真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、JZJHWLW型(xing)(xing)(xing)(xing)(xing)(xing)立(li)式(shi)无油真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、JZJP型(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)(ci)水(shui)喷射真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、JZJHBA型(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)(ci)水(shui)环真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)、RPP型(xing)(xing)(xing)(xing)(xing)(xing)水(shui)喷射真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)、JZJH2H型(xing)(xing)(xing)(xing)(xing)(xing)罗茨(ci)(ci)滑阀式(shi)真(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)(kong)(kong)机(ji)组(zu)等型(xing)(xing)(xing)(xing)(xing)(xing)号。　　

　　工作原理：　

　　1.首先(xian)应该(gai)充分了(le)解被(bei)抽(chou)气(qi)(qi)(qi)体成分。如气(qi)(qi)(qi)体中(zhong)含不含可凝蒸气(qi)(qi)(qi)、有无颗粒灰尘(chen)(chen)、有无腐蚀(shi)性、爆(bao)炸性等(deng)。如果气(qi)(qi)(qi)体中(zhong)含有蒸气(qi)(qi)(qi)、颗粒、及(ji)腐蚀(shi)性气(qi)(qi)(qi)体，应该(gai)考虑在泵的进气(qi)(qi)(qi)口管路上(shang)安装辅助设(she)备，如冷(leng)凝器、除尘(chen)(chen)器等(deng)。如抽(chou)取气(qi)(qi)(qi)体还有腐蚀(shi)性，则须选用材质(zhi)。若(ruo)抽(chou)取的气(qi)(qi)(qi)体具有爆(bao)炸性，则应该(gai)选择水(shui)环式(shi)真空泵并且配(pei)防(fang)爆(bao)电机(ji)，因为水(shui)环式(shi)真空泵整(zheng)个(ge)工作过(guo)程(cheng)是等(deng)温的。　　

　　2.真空设备(bei)或(huo)者零部件对油(you)(you)污(wu)(wu)染的(de)要(yao)求。若设备(bei)严(yan)格要(yao)求无油(you)(you)时，应该选(xuan)各种无油(you)(you)泵(beng)(beng)，如：水(shui)环式真空泵(beng)(beng)、分子筛吸附泵(beng)(beng)、溅射离子泵(beng)(beng)、低温(wen)泵(beng)(beng)等。若要(yao)求不严(yan)格，可以选(xuan)择(ze)有油(you)(you)泵(beng)(beng)，并且(qie)加上一些防(fang)油(you)(you)污(wu)(wu)染措(cuo)施，如加冷阱(jing)、障板、挡油(you)(you)阱(jing)等，也能达到清(qing)洁真空要(yao)求。　　

　　3.真(zhen)空(kong)泵排出(chu)来的(de)油(you)蒸气对环(huan)境的(de)影响(xiang)如何(he)。如果环(huan)境不允许有污染，可以(yi)选无油(you)真(zhen)空(kong)泵如水(shui)环(huan)式(shi)真(zhen)空(kong)泵，或(huo)者把油(you)蒸气排到(dao)室(shi)外(wai)。　　

　　4.如(ru)有多台大(da)型(xing)水环(huan)式真空泵同(tong)时工作，循(xun)环(huan)液应该进行(xing)冷却(que)，否则影响(xiang)真空度。冷却(que)装置可以配备冷却(que)塔，同(tong)时须(xu)配增(zeng)压泵对管路加(jia)压。　

　　5.真空(kong)泵的工(gong)作(zuo)压强应该(gai)满足(zu)真空(kong)设(she)(she)备的极限真空(kong)及工(gong)作(zuo)压强要(yao)求。通常选择真空(kong)泵泵的真空(kong)度要(yao)高于真空(kong)设(she)(she)备真空(kong)度半(ban)个(ge)到一个(ge)数(shu)量(liang)级(ji)。　

　　6.真(zhen)空(kong)泵(beng)在其工(gong)作压强下，应能排(pai)走(zou)真(zhen)空(kong)设备(bei)工(gong)艺(yi)过(guo)程中(zhong)产生的全部气体(ti)量。

它具有(you)结(jie)构简单、操作容易、维护方便、不会(hui)污染环(huan)境等(deng)优点(dian)。无油(you)真(zhen)(zhen)空(kong)泵耐用(yong)(yong)性好(hao)，是(shi)抽真(zhen)(zhen)空(kong)，压缩，两用(yong)(yong)真(zhen)(zhen)空(kong)泵，是(shi)一种应用(yong)(yong)范围非常广(guang)泛获得真(zhen)(zhen)空(kong)的基(ji)本(ben)设备(bei)。

无油真(zhen)空(kong)泵(beng)与(yu)油泵(beng)相比真(zhen)空(kong)度低，抽(chou)气量小，但(dan)体积小巧，易(yi)于安装(zhuang)，维护简单(dan)，移动方便，不产生(sheng)油烟，不污(wu)染环境，尤其在(zai)要(yao)求(qiu)较高(gao)的实验室使(shi)用较好。也是(shi)实验室最(zui)常备的设(she)备之一(yi)。

因此在选购无(wu)油真(zhen)(zhen)空(kong)泵(beng)时要(yao)(yao)先确定要(yao)(yao)求工作的(de)真(zhen)(zhen)空(kong)度(du)，如果需求的(de)真(zhen)(zhen)度(du)高，而选的(de)真(zhen)(zhen)空(kong)泵(beng)就(jiu)要(yao)(yao)高于需求的(de)真(zhen)(zhen)空(kong)度(du)，否则达不到抽(chou)真(zhen)(zhen)空(kong)的(de)要(yao)(yao)求，就(jiu)会达不到工作要(yao)(yao)求。其次(ci)是无(wu)油真(zhen)(zhen)空(kong)泵(beng)抽(chou)气(qi)速率(lv)，选型时就(jiu)要(yao)(yao)稍大于所需求的(de)抽(chou)气(qi)速率(lv)，这样就(jiu)能更(geng)好(hao)的(de)满(man)(man)足需要(yao)(yao)。最后看(kan)抽(chou)取的(de)气(qi)体有无(wu)腐蚀性，有腐蚀的(de)气(qi)体会腐蚀泵(beng)，必(bi)须要(yao)(yao)用特殊的(de)材质才能满(man)(man)足需求。