无油式真空泵是一种旋转(zhuan)式变容真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)须有(you)前级泵(beng)(beng)配合方可(ke)使用在较(jiao)宽的压力范围内(nei)有(you)较(jiao)大的抽速对(dui)被抽除(chu)气体中含有(you)灰尘和(he)水(shui)蒸汽不敏感(gan)广泛用于冶金、化工、食(shi)品(pin)、电子(zi)镀膜(mo)等(deng)(deng)行业。主要(yao)有(you)WLW系列立式无油真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)、W型(xing)(xing)(xing)往复式真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)、2X,2XZ型(xing)(xing)(xing)旋片式真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)、ZJ，ZJH型(xing)(xing)(xing)罗茨(ci)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)（ZJH型(xing)(xing)(xing)为(wei)专利产真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)品(pin)）、2SK、SK型(xing)(xing)(xing)水(shui)环式真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)、2BV、2BA型(xing)(xing)(xing)水(shui)环式真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)、H、2H型(xing)(xing)(xing)滑阀真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)、TLZ型(xing)(xing)(xing)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)、SL型(xing)(xing)(xing)罗茨(ci)鼓风机(ji)、JZJHX型(xing)(xing)(xing)罗茨(ci)旋片真(zhen)(zhen)(zhen)空(kong)(kong)(kong)机(ji)组(zu)、JZJHS型(xing)(xing)(xing)罗茨(ci)水(shui)环真(zhen)(zhen)(zhen)空(kong)(kong)(kong)机(ji)组(zu)、JZJHWLW型(xing)(xing)(xing)立式无油真(zhen)(zhen)(zhen)空(kong)(kong)(kong)机(ji)组(zu)、JZJP型(xing)(xing)(xing)罗茨(ci)水(shui)喷射真(zhen)(zhen)(zhen)空(kong)(kong)(kong)机(ji)组(zu)、JZJHBA型(xing)(xing)(xing)罗茨(ci)水(shui)环真(zhen)(zhen)(zhen)空(kong)(kong)(kong)机(ji)组(zu)、RPP型(xing)(xing)(xing)水(shui)喷射真(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)、JZJH2H型(xing)(xing)(xing)罗茨(ci)滑阀式真(zhen)(zhen)(zhen)空(kong)(kong)(kong)机(ji)组(zu)等(deng)(deng)型(xing)(xing)(xing)号。　　

　　工作原理：　

　　1.首先(xian)应该充分(fen)了(le)解(jie)被抽(chou)气(qi)(qi)(qi)(qi)体(ti)(ti)(ti)成(cheng)分(fen)。如(ru)气(qi)(qi)(qi)(qi)体(ti)(ti)(ti)中含(han)不含(han)可凝蒸(zheng)气(qi)(qi)(qi)(qi)、有(you)无颗(ke)粒(li)(li)灰尘、有(you)无腐(fu)蚀性(xing)(xing)、爆炸(zha)性(xing)(xing)等。如(ru)果气(qi)(qi)(qi)(qi)体(ti)(ti)(ti)中含(han)有(you)蒸(zheng)气(qi)(qi)(qi)(qi)、颗(ke)粒(li)(li)、及腐(fu)蚀性(xing)(xing)气(qi)(qi)(qi)(qi)体(ti)(ti)(ti)，应该考(kao)虑(lv)在泵的(de)进(jin)气(qi)(qi)(qi)(qi)口管路上安装辅助(zhu)设(she)备，如(ru)冷凝器、除尘器等。如(ru)抽(chou)取(qu)气(qi)(qi)(qi)(qi)体(ti)(ti)(ti)还有(you)腐(fu)蚀性(xing)(xing)，则须选用材(cai)质。若(ruo)抽(chou)取(qu)的(de)气(qi)(qi)(qi)(qi)体(ti)(ti)(ti)具(ju)有(you)爆炸(zha)性(xing)(xing)，则应该选择水环(huan)(huan)式真(zhen)空泵并且配(pei)防爆电(dian)机，因为水环(huan)(huan)式真(zhen)空泵整(zheng)个工作过程是(shi)等温的(de)。　　

　　2.真(zhen)空设(she)备(bei)或者零部(bu)件对油污(wu)染的要(yao)(yao)求。若(ruo)设(she)备(bei)严格(ge)要(yao)(yao)求无油时，应该选各(ge)种无油泵(beng)，如：水环式真(zhen)空泵(beng)、分子筛(shai)吸附泵(beng)、溅射离(li)子泵(beng)、低温泵(beng)等。若(ruo)要(yao)(yao)求不严格(ge)，可以选择有(you)油泵(beng)，并且加上(shang)一(yi)些防油污(wu)染措施，如加冷阱(jing)、障板、挡油阱(jing)等，也能达到清洁真(zhen)空要(yao)(yao)求。　　

　　3.真(zhen)空泵(beng)排(pai)出(chu)来的油蒸(zheng)气对环(huan)境的影响如何。如果环(huan)境不允许有(you)污染，可以选(xuan)无油真(zhen)空泵(beng)如水环(huan)式真(zhen)空泵(beng)，或者把油蒸(zheng)气排(pai)到室(shi)外。　　

　　4.如有多台(tai)大型水环(huan)(huan)式真空泵同(tong)时(shi)工(gong)作，循环(huan)(huan)液(ye)应(ying)该进行冷(leng)却(que)，否则影(ying)响真空度(du)。冷(leng)却(que)装置可以配备冷(leng)却(que)塔(ta)，同(tong)时(shi)须配增压泵对管路(lu)加压。　

　　5.真(zhen)(zhen)空(kong)(kong)(kong)泵的(de)(de)工(gong)作(zuo)压强应(ying)该满足真(zhen)(zhen)空(kong)(kong)(kong)设(she)备(bei)的(de)(de)极限真(zhen)(zhen)空(kong)(kong)(kong)及工(gong)作(zuo)压强要(yao)求(qiu)。通常选择真(zhen)(zhen)空(kong)(kong)(kong)泵泵的(de)(de)真(zhen)(zhen)空(kong)(kong)(kong)度(du)要(yao)高于真(zhen)(zhen)空(kong)(kong)(kong)设(she)备(bei)真(zhen)(zhen)空(kong)(kong)(kong)度(du)半(ban)个到一(yi)个数量(liang)级(ji)。　

　　6.真空泵在其工作压强(qiang)下，应能排走真空设备工艺过程中产(chan)生的全部气(qi)体量。

它具有(you)结构简单、操(cao)作容易、维护(hu)方便、不会污染环境等优点。无油真(zhen)空(kong)泵耐用性好，是抽真(zhen)空(kong)，压缩，两(liang)用真(zhen)空(kong)泵，是一种应用范围非(fei)常广泛获(huo)得真(zhen)空(kong)的基(ji)本设备。

无油真空泵(beng)与油泵(beng)相比真空度低(di)，抽气量小(xiao)，但体积小(xiao)巧(qiao)，易(yi)于安装，维护简(jian)单，移动方便，不产生(sheng)油烟，不污染环境，尤其在要求较高(gao)的(de)实(shi)验室使用较好(hao)。也是实(shi)验室最(zui)常备(bei)的(de)设备(bei)之(zhi)一(yi)。

因此在选(xuan)(xuan)购无油(you)真(zhen)空泵时要先确定要求(qiu)工(gong)作(zuo)的(de)真(zhen)空度(du)，如果(guo)需求(qiu)的(de)真(zhen)度(du)高，而(er)选(xuan)(xuan)的(de)真(zhen)空泵就(jiu)要高于需求(qiu)的(de)真(zhen)空度(du)，否则达(da)不(bu)到抽(chou)(chou)真(zhen)空的(de)要求(qiu)，就(jiu)会(hui)达(da)不(bu)到工(gong)作(zuo)要求(qiu)。其次是(shi)无油(you)真(zhen)空泵抽(chou)(chou)气(qi)(qi)速(su)率，选(xuan)(xuan)型时就(jiu)要稍(shao)大于所需求(qiu)的(de)抽(chou)(chou)气(qi)(qi)速(su)率，这样就(jiu)能更好的(de)满足需要。最(zui)后(hou)看抽(chou)(chou)取的(de)气(qi)(qi)体有(you)无腐(fu)蚀性，有(you)腐(fu)蚀的(de)气(qi)(qi)体会(hui)腐(fu)蚀泵，必须(xu)要用特殊的(de)材质才能满足需求(qiu)。