無油式真空泵是一種旋轉式(shi)變容真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)須有(you)前級(ji)泵(beng)(beng)(beng)配合方可使用在較寬(kuan)的(de)壓力范圍內有(you)較大(da)的(de)抽速對被抽除氣體(ti)中含有(you)灰塵(chen)和水(shui)蒸汽不敏感(gan)廣(guang)泛用于冶金、化工、食品(pin)、電子鍍膜(mo)等行業。主要(yao)有(you)WLW系列立式(shi)無油(you)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、W型(xing)(xing)往復式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2X,2XZ型(xing)(xing)旋片(pian)式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、ZJ，ZJH型(xing)(xing)羅(luo)(luo)茨(ci)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)（ZJH型(xing)(xing)為zhuanli產真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)品(pin)）、2SK、SK型(xing)(xing)水(shui)環(huan)式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、2BV、2BA型(xing)(xing)水(shui)環(huan)式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、H、2H型(xing)(xing)滑閥(fa)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、TLZ型(xing)(xing)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、SL型(xing)(xing)羅(luo)(luo)茨(ci)鼓風機(ji)、JZJHX型(xing)(xing)羅(luo)(luo)茨(ci)旋片(pian)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)機(ji)組(zu)、JZJHS型(xing)(xing)羅(luo)(luo)茨(ci)水(shui)環(huan)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)機(ji)組(zu)、JZJHWLW型(xing)(xing)立式(shi)無油(you)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)機(ji)組(zu)、JZJP型(xing)(xing)羅(luo)(luo)茨(ci)水(shui)噴射真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)機(ji)組(zu)、JZJHBA型(xing)(xing)羅(luo)(luo)茨(ci)水(shui)環(huan)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)機(ji)組(zu)、RPP型(xing)(xing)水(shui)噴射真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)、JZJH2H型(xing)(xing)羅(luo)(luo)茨(ci)滑閥(fa)式(shi)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)機(ji)組(zu)等型(xing)(xing)號。　　

　　工作原理：　

　　1.首先應該(gai)充分了(le)解被抽(chou)氣(qi)(qi)(qi)體(ti)(ti)(ti)成分。如(ru)(ru)氣(qi)(qi)(qi)體(ti)(ti)(ti)中(zhong)含不(bu)含可凝蒸氣(qi)(qi)(qi)、有無(wu)(wu)顆(ke)(ke)粒(li)(li)灰塵(chen)、有無(wu)(wu)腐蝕性(xing)、爆(bao)(bao)炸性(xing)等(deng)。如(ru)(ru)果氣(qi)(qi)(qi)體(ti)(ti)(ti)中(zhong)含有蒸氣(qi)(qi)(qi)、顆(ke)(ke)粒(li)(li)、及腐蝕性(xing)氣(qi)(qi)(qi)體(ti)(ti)(ti)，應該(gai)考(kao)慮在泵(beng)的進(jin)氣(qi)(qi)(qi)口管路上(shang)安裝輔(fu)助設備，如(ru)(ru)冷(leng)凝器(qi)、除(chu)塵(chen)器(qi)等(deng)。如(ru)(ru)抽(chou)取(qu)(qu)氣(qi)(qi)(qi)體(ti)(ti)(ti)還有腐蝕性(xing)，則須選用材質。若抽(chou)取(qu)(qu)的氣(qi)(qi)(qi)體(ti)(ti)(ti)具(ju)有爆(bao)(bao)炸性(xing)，則應該(gai)選擇水(shui)環(huan)式真(zhen)空泵(beng)并且配防爆(bao)(bao)電機，因為(wei)水(shui)環(huan)式真(zhen)空泵(beng)整個工作(zuo)過(guo)程是(shi)等(deng)溫的。　　

　　2.真(zhen)(zhen)空(kong)設備或者零部件對油(you)(you)污(wu)染的要(yao)求。若設備嚴格(ge)要(yao)求無油(you)(you)時，應該選各(ge)種無油(you)(you)泵，如：水環式(shi)真(zhen)(zhen)空(kong)泵、分子篩吸(xi)附(fu)泵、濺射離子泵、低溫泵等。若要(yao)求不嚴格(ge)，可以(yi)選擇(ze)有油(you)(you)泵，并(bing)且加上一(yi)些(xie)防(fang)油(you)(you)污(wu)染措施，如加冷阱、障板(ban)、擋油(you)(you)阱等，也能達到清潔(jie)真(zhen)(zhen)空(kong)要(yao)求。　　

　　3.真(zhen)空(kong)泵排出來的油(you)(you)蒸氣對環(huan)境的影響如何(he)。如果環(huan)境不允許有污(wu)染(ran)，可以選無(wu)油(you)(you)真(zhen)空(kong)泵如水環(huan)式(shi)真(zhen)空(kong)泵，或者把油(you)(you)蒸氣排到室外。　　

　　4.如有多(duo)臺大(da)型水環式真空泵同時(shi)工(gong)作，循環液(ye)應該進行冷卻(que)，否則影響(xiang)真空度。冷卻(que)裝(zhuang)置可以(yi)配備冷卻(que)塔，同時(shi)須配增(zeng)壓泵對管路加壓。　

　　5.真(zhen)(zhen)(zhen)空泵的工作壓(ya)強(qiang)應(ying)該滿足真(zhen)(zhen)(zhen)空設備的極限真(zhen)(zhen)(zhen)空及工作壓(ya)強(qiang)要求。通常選擇真(zhen)(zhen)(zhen)空泵泵的真(zhen)(zhen)(zhen)空度要高于真(zhen)(zhen)(zhen)空設備真(zhen)(zhen)(zhen)空度半(ban)個(ge)到一個(ge)數量(liang)級。　

　　6.真空泵在其工作壓強下(xia)，應能(neng)排走真空設備(bei)工藝過程中產(chan)生的(de)全部氣體量。

它具有結(jie)構(gou)簡單、操作容易、維護方便、不會污(wu)染環(huan)境等優點。無(wu)油真空泵耐用性好，是(shi)抽真空，壓縮，兩用真空泵，是(shi)一種應用范圍(wei)非常廣泛獲得真空的基本設(she)備。

無油真空泵(beng)與(yu)油泵(beng)相比真空度低，抽氣量小(xiao)，但體積(ji)小(xiao)巧，易于(yu)安裝，維護簡單，移動方便，不產(chan)生油煙，不污(wu)染環境，尤其在要求較(jiao)(jiao)高的實(shi)驗室(shi)使用較(jiao)(jiao)好。也是實(shi)驗室(shi)最常備的設備之一(yi)。

因此在選購無油真(zhen)(zhen)空(kong)(kong)泵時(shi)要(yao)先確定(ding)要(yao)求(qiu)工作的(de)(de)真(zhen)(zhen)空(kong)(kong)度，如果需(xu)(xu)求(qiu)的(de)(de)真(zhen)(zhen)度高(gao)，而選的(de)(de)真(zhen)(zhen)空(kong)(kong)泵就要(yao)高(gao)于需(xu)(xu)求(qiu)的(de)(de)真(zhen)(zhen)空(kong)(kong)度，否(fou)則達不到(dao)抽(chou)真(zhen)(zhen)空(kong)(kong)的(de)(de)要(yao)求(qiu)，就會達不到(dao)工作要(yao)求(qiu)。其次是無油真(zhen)(zhen)空(kong)(kong)泵抽(chou)氣(qi)速率(lv)，選型時(shi)就要(yao)稍大于所需(xu)(xu)求(qiu)的(de)(de)抽(chou)氣(qi)速率(lv)，這(zhe)樣(yang)就能更好的(de)(de)滿足(zu)需(xu)(xu)要(yao)。最后看抽(chou)取的(de)(de)氣(qi)體有無腐(fu)蝕性，有腐(fu)蝕的(de)(de)氣(qi)體會腐(fu)蝕泵，必須要(yao)用特殊(shu)的(de)(de)材質(zhi)才能滿足(zu)需(xu)(xu)求(qiu)。