无油式真空泵是一种旋(xuan)转式(shi)变容真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)须有(you)前级泵(beng)(beng)(beng)(beng)(beng)配(pei)合方可使(shi)用(yong)(yong)在较宽的压力范围内有(you)较大的抽速(su)对被抽除气(qi)体(ti)中含有(you)灰尘和(he)水(shui)蒸汽不敏感广泛用(yong)(yong)于冶金(jin)、化工、食品、电子镀膜等行业。主要有(you)WLW系(xi)列立式(shi)无油真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、W型(xing)(xing)(xing)(xing)往复式(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、2X,2XZ型(xing)(xing)(xing)(xing)旋(xuan)片(pian)式(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、ZJ，ZJH型(xing)(xing)(xing)(xing)罗(luo)茨(ci)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)（ZJH型(xing)(xing)(xing)(xing)为专利产(chan)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)品）、2SK、SK型(xing)(xing)(xing)(xing)水(shui)环(huan)式(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、2BV、2BA型(xing)(xing)(xing)(xing)水(shui)环(huan)式(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、H、2H型(xing)(xing)(xing)(xing)滑阀真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、TLZ型(xing)(xing)(xing)(xing)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、SL型(xing)(xing)(xing)(xing)罗(luo)茨(ci)鼓(gu)风机、JZJHX型(xing)(xing)(xing)(xing)罗(luo)茨(ci)旋(xuan)片(pian)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)机组(zu)(zu)、JZJHS型(xing)(xing)(xing)(xing)罗(luo)茨(ci)水(shui)环(huan)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)机组(zu)(zu)、JZJHWLW型(xing)(xing)(xing)(xing)立式(shi)无油真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)机组(zu)(zu)、JZJP型(xing)(xing)(xing)(xing)罗(luo)茨(ci)水(shui)喷射真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)机组(zu)(zu)、JZJHBA型(xing)(xing)(xing)(xing)罗(luo)茨(ci)水(shui)环(huan)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)机组(zu)(zu)、RPP型(xing)(xing)(xing)(xing)水(shui)喷射真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)(beng)(beng)(beng)、JZJH2H型(xing)(xing)(xing)(xing)罗(luo)茨(ci)滑阀式(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)机组(zu)(zu)等型(xing)(xing)(xing)(xing)号。　　

　　工作原理：　

　　1.首(shou)先(xian)应(ying)(ying)该充分(fen)了(le)解被抽(chou)(chou)气(qi)体成分(fen)。如气(qi)体中含(han)不含(han)可(ke)凝蒸气(qi)、有(you)无颗(ke)粒灰(hui)尘(chen)、有(you)无腐(fu)蚀性(xing)(xing)、爆(bao)炸性(xing)(xing)等(deng)。如果气(qi)体中含(han)有(you)蒸气(qi)、颗(ke)粒、及腐(fu)蚀性(xing)(xing)气(qi)体，应(ying)(ying)该考虑在(zai)泵(beng)的进气(qi)口(kou)管路上安装(zhuang)辅助设(she)备，如冷凝器、除(chu)尘(chen)器等(deng)。如抽(chou)(chou)取(qu)气(qi)体还有(you)腐(fu)蚀性(xing)(xing)，则须选用(yong)材质。若抽(chou)(chou)取(qu)的气(qi)体具有(you)爆(bao)炸性(xing)(xing)，则应(ying)(ying)该选择水(shui)环(huan)式真空泵(beng)并且(qie)配(pei)防爆(bao)电机，因为(wei)水(shui)环(huan)式真空泵(beng)整个工作过程是等(deng)温的。　　

　　2.真空(kong)设备或者零部件对油(you)(you)(you)污染的(de)要(yao)求(qiu)。若设备严格要(yao)求(qiu)无油(you)(you)(you)时，应该选(xuan)各种无油(you)(you)(you)泵(beng)，如：水环式真空(kong)泵(beng)、分子筛吸(xi)附泵(beng)、溅射离子泵(beng)、低温泵(beng)等。若要(yao)求(qiu)不严格，可以选(xuan)择有(you)油(you)(you)(you)泵(beng)，并(bing)且加(jia)上一些防油(you)(you)(you)污染措(cuo)施，如加(jia)冷阱、障板、挡油(you)(you)(you)阱等，也能(neng)达(da)到清(qing)洁真空(kong)要(yao)求(qiu)。　　

　　3.真(zhen)(zhen)空泵排(pai)(pai)出来的油(you)(you)蒸(zheng)(zheng)气对(dui)环(huan)境的影响(xiang)如何。如果环(huan)境不允许有(you)污染，可以选(xuan)无油(you)(you)真(zhen)(zhen)空泵如水(shui)环(huan)式(shi)真(zhen)(zhen)空泵，或(huo)者把油(you)(you)蒸(zheng)(zheng)气排(pai)(pai)到室外。　　

　　4.如有(you)多(duo)台大(da)型水环式(shi)真(zhen)空泵同(tong)时工作，循环液应该进行(xing)冷(leng)却(que)，否则(ze)影响真(zhen)空度。冷(leng)却(que)装置可以配备冷(leng)却(que)塔(ta)，同(tong)时须配增压泵对(dui)管路(lu)加压。　

　　5.真空(kong)(kong)泵(beng)(beng)的(de)工(gong)作(zuo)压强应该满足真空(kong)(kong)设(she)备的(de)极限真空(kong)(kong)及工(gong)作(zuo)压强要求。通常(chang)选择真空(kong)(kong)泵(beng)(beng)泵(beng)(beng)的(de)真空(kong)(kong)度要高于(yu)真空(kong)(kong)设(she)备真空(kong)(kong)度半(ban)个(ge)(ge)到一个(ge)(ge)数量级。　

　　6.真空(kong)泵在其(qi)工作(zuo)压强下，应能排走真空(kong)设(she)备工艺过程中(zhong)产生的全(quan)部气(qi)体量。

它具有结(jie)构简单、操作(zuo)容易、维护方便、不会污(wu)染环境等优点。无油(you)真空(kong)泵耐用性好(hao)，是抽真空(kong)，压(ya)缩，两用真空(kong)泵，是一种应(ying)用范围非常广泛获(huo)得真空(kong)的基本设(she)备。

无油(you)(you)真空泵与油(you)(you)泵相比真空度低(di)，抽气量小，但体积小巧，易(yi)于安装(zhuang)，维护简单，移动方便，不产生油(you)(you)烟，不污染(ran)环(huan)境，尤(you)其(qi)在要(yao)求较(jiao)高的(de)实(shi)验室使用较(jiao)好。也是(shi)实(shi)验室最常备(bei)的(de)设备(bei)之一。

因此在选(xuan)购无油(you)真(zhen)(zhen)空(kong)泵时(shi)要先确定要求(qiu)工(gong)作(zuo)的(de)(de)真(zhen)(zhen)空(kong)度(du)，如果需(xu)求(qiu)的(de)(de)真(zhen)(zhen)度(du)高，而选(xuan)的(de)(de)真(zhen)(zhen)空(kong)泵就要高于(yu)需(xu)求(qiu)的(de)(de)真(zhen)(zhen)空(kong)度(du)，否(fou)则达(da)不(bu)到(dao)抽(chou)(chou)真(zhen)(zhen)空(kong)的(de)(de)要求(qiu)，就会达(da)不(bu)到(dao)工(gong)作(zuo)要求(qiu)。其次是无油(you)真(zhen)(zhen)空(kong)泵抽(chou)(chou)气(qi)速(su)率，选(xuan)型(xing)时(shi)就要稍大于(yu)所需(xu)求(qiu)的(de)(de)抽(chou)(chou)气(qi)速(su)率，这样(yang)就能更好的(de)(de)满(man)足需(xu)要。最后看抽(chou)(chou)取的(de)(de)气(qi)体有无腐蚀(shi)性，有腐蚀(shi)的(de)(de)气(qi)体会腐蚀(shi)泵，必须要用特殊的(de)(de)材质才能满(man)足需(xu)求(qiu)。