无油式真空泵是一种(zhong)旋(xuan)转式(shi)变容(rong)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)须有前级(ji)泵(beng)(beng)(beng)配(pei)合方可使用在较宽(kuan)的压力范围(wei)内有较大的抽速对被抽除气体(ti)中(zhong)含(han)有灰尘(chen)和(he)水蒸(zheng)汽(qi)不敏感广泛用于(yu)冶金、化工、食(shi)品、电子镀(du)膜等行业。主(zhu)要(yao)有WLW系列(lie)立式(shi)无油(you)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、W型(xing)(xing)往复(fu)式(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2X,2XZ型(xing)(xing)旋(xuan)片(pian)式(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、ZJ，ZJH型(xing)(xing)罗(luo)(luo)(luo)茨(ci)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)（ZJH型(xing)(xing)为专利产(chan)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)品）、2SK、SK型(xing)(xing)水环(huan)(huan)式(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2BV、2BA型(xing)(xing)水环(huan)(huan)式(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、H、2H型(xing)(xing)滑阀真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、TLZ型(xing)(xing)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、SL型(xing)(xing)罗(luo)(luo)(luo)茨(ci)鼓风机、JZJHX型(xing)(xing)罗(luo)(luo)(luo)茨(ci)旋(xuan)片(pian)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机组、JZJHS型(xing)(xing)罗(luo)(luo)(luo)茨(ci)水环(huan)(huan)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机组、JZJHWLW型(xing)(xing)立式(shi)无油(you)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机组、JZJP型(xing)(xing)罗(luo)(luo)(luo)茨(ci)水喷(pen)射(she)(she)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机组、JZJHBA型(xing)(xing)罗(luo)(luo)(luo)茨(ci)水环(huan)(huan)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机组、RPP型(xing)(xing)水喷(pen)射(she)(she)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、JZJH2H型(xing)(xing)罗(luo)(luo)(luo)茨(ci)滑阀式(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)机组等型(xing)(xing)号。　　

　　工作原理：　

　　1.首先(xian)应该充分了(le)解被抽(chou)气(qi)(qi)(qi)体(ti)成分。如(ru)气(qi)(qi)(qi)体(ti)中含不含可(ke)凝(ning)蒸气(qi)(qi)(qi)、有(you)无颗粒灰尘、有(you)无腐蚀(shi)性(xing)(xing)、爆(bao)炸(zha)性(xing)(xing)等(deng)。如(ru)果(guo)气(qi)(qi)(qi)体(ti)中含有(you)蒸气(qi)(qi)(qi)、颗粒、及腐蚀(shi)性(xing)(xing)气(qi)(qi)(qi)体(ti)，应该考虑在泵(beng)(beng)的进气(qi)(qi)(qi)口管路(lu)上(shang)安(an)装辅(fu)助设(she)备，如(ru)冷凝(ning)器、除(chu)尘器等(deng)。如(ru)抽(chou)取气(qi)(qi)(qi)体(ti)还有(you)腐蚀(shi)性(xing)(xing)，则须选用材质。若(ruo)抽(chou)取的气(qi)(qi)(qi)体(ti)具有(you)爆(bao)炸(zha)性(xing)(xing)，则应该选择(ze)水(shui)环(huan)式(shi)真空(kong)泵(beng)(beng)并且配防爆(bao)电机(ji)，因为水(shui)环(huan)式(shi)真空(kong)泵(beng)(beng)整个工作过程是等(deng)温的。　　

　　2.真空设备(bei)或者(zhe)零部件对(dui)油污染的要(yao)求(qiu)(qiu)。若设备(bei)严格要(yao)求(qiu)(qiu)无(wu)油时，应该选各种无(wu)油泵(beng)，如：水(shui)环式真空泵(beng)、分子筛吸附泵(beng)、溅射离子泵(beng)、低温泵(beng)等。若要(yao)求(qiu)(qiu)不严格，可以选择(ze)有油泵(beng)，并(bing)且加上一些防油污染措施，如加冷阱、障板、挡油阱等，也能达到清(qing)洁(jie)真空要(yao)求(qiu)(qiu)。　　

　　3.真空泵(beng)排(pai)出来的油(you)蒸(zheng)气对环境的影响如(ru)何。如(ru)果环境不允(yun)许有污染(ran)，可以选无油(you)真空泵(beng)如(ru)水环式真空泵(beng)，或者把油(you)蒸(zheng)气排(pai)到(dao)室外。　　

　　4.如有多(duo)台大型(xing)水环(huan)式真空(kong)(kong)泵(beng)同(tong)时工作(zuo)，循环(huan)液应该进行冷却，否则影响(xiang)真空(kong)(kong)度。冷却装置可(ke)以配(pei)备冷却塔，同(tong)时须配(pei)增压泵(beng)对管路加压。　

　　5.真(zhen)空(kong)(kong)泵的(de)(de)工(gong)作压强(qiang)应(ying)该(gai)满足真(zhen)空(kong)(kong)设备的(de)(de)极(ji)限真(zhen)空(kong)(kong)及(ji)工(gong)作压强(qiang)要(yao)求(qiu)。通(tong)常选择真(zhen)空(kong)(kong)泵泵的(de)(de)真(zhen)空(kong)(kong)度(du)(du)要(yao)高于真(zhen)空(kong)(kong)设备真(zhen)空(kong)(kong)度(du)(du)半个(ge)到一个(ge)数(shu)量级。　

　　6.真(zhen)空泵在其工(gong)作压强下，应能排走真(zhen)空设备工(gong)艺过(guo)程中产生的全部气体(ti)量。

它具有结(jie)构(gou)简单、操作容(rong)易、维护(hu)方(fang)便、不会污(wu)染(ran)环境等优点(dian)。无油真空泵(beng)耐用(yong)(yong)(yong)性好，是抽真空，压缩，两用(yong)(yong)(yong)真空泵(beng)，是一种应(ying)用(yong)(yong)(yong)范围非常广泛获得真空的基(ji)本设备。

无油(you)真(zhen)空泵与油(you)泵相比(bi)真(zhen)空度低(di)，抽气量小(xiao)，但体(ti)积小(xiao)巧(qiao)，易于(yu)安装，维护简单，移动方便，不产生(sheng)油(you)烟(yan)，不污染(ran)环(huan)境，尤(you)其在要(yao)求较高的实(shi)验(yan)室使用较好。也(ye)是实(shi)验(yan)室最常备(bei)的设备(bei)之一。

因此在选(xuan)(xuan)购无(wu)油真空(kong)(kong)泵时(shi)要(yao)先确定(ding)要(yao)求(qiu)(qiu)(qiu)工作的真空(kong)(kong)度，如果需求(qiu)(qiu)(qiu)的真度高(gao)，而选(xuan)(xuan)的真空(kong)(kong)泵就要(yao)高(gao)于需求(qiu)(qiu)(qiu)的真空(kong)(kong)度，否则达(da)(da)不到(dao)抽(chou)真空(kong)(kong)的要(yao)求(qiu)(qiu)(qiu)，就会(hui)达(da)(da)不到(dao)工作要(yao)求(qiu)(qiu)(qiu)。其次是无(wu)油真空(kong)(kong)泵抽(chou)气(qi)速率(lv)，选(xuan)(xuan)型时(shi)就要(yao)稍大于所需求(qiu)(qiu)(qiu)的抽(chou)气(qi)速率(lv)，这样就能更好的满(man)足(zu)需要(yao)。最后看(kan)抽(chou)取的气(qi)体有(you)无(wu)腐(fu)蚀(shi)性，有(you)腐(fu)蚀(shi)的气(qi)体会(hui)腐(fu)蚀(shi)泵，必须要(yao)用特殊的材(cai)质才能满(man)足(zu)需求(qiu)(qiu)(qiu)。