進(jin)(jin)(jin)水(shui)(shui)(shui)(shui)(shui)管(guan)的(de)進(jin)(jin)(jin)水(shui)(shui)(shui)(shui)(shui)口方位(wei)不(bu)對①進(jin)(jin)(jin)水(shui)(shui)(shui)(shui)(shui)管(guan)的(de)進(jin)(jin)(jin)水(shui)(shui)(shui)(shui)(shui)口離(li)進(jin)(jin)(jin)水(shui)(shui)(shui)(shui)(shui)池(chi)底和池(chi)壁間(jian)隔小(xiao)于進(jin)(jin)(jin)水(shui)(shui)(shui)(shui)(shui)口直徑(jing)。若是(shi)池(chi)底有泥沙等污(wu)物時(shi)，進(jin)(jin)(jin)水(shui)(shui)(shui)(shui)(shui)口離(li)池(chi)底的(de)間(jian)隔小(xiao)于直徑(jing)的(de)1.5倍時(shi)，會形(xing)成抽水(shui)(shui)(shui)(shui)(shui)時(shi)進(jin)(jin)(jin)水(shui)(shui)(shui)(shui)(shui)不(bu)暢或(huo)吸(xi)進(jin)(jin)(jin)泥沙雜物，阻塞(sai)進(jin)(jin)(jin)水(shui)(shui)(shui)(shui)(shui)口。②進(jin)(jin)(jin)水(shui)(shui)(shui)(shui)(shui)管(guan)的(de)進(jin)(jin)(jin)水(shui)(shui)(shui)(shui)(shui)口入水(shui)(shui)(shui)(shui)(shui)深度不(bu)行時(shi)，這樣會引起進(jin)(jin)(jin)水(shui)(shui)(shui)(shui)(shui)管(guan)周圍水(shui)(shui)(shui)(shui)(shui)面發生漩(xuan)渦，影(ying)響進(jin)(jin)(jin)水(shui)(shui)(shui)(shui)(shui)，削(xue)減出水(shui)(shui)(shui)(shui)(shui)量。正確的(de)裝(zhuang)置辦法是(shi)：中小(xiao)型水(shui)(shui)(shui)(shui)(shui)真空(kong)泵(beng)入水(shui)(shui)(shui)(shui)(shui)深度不(bu)得小(xiao)于300～600mm，大型水(shui)(shui)(shui)(shui)(shui)真空(kong)泵(beng)不(bu)得小(xiao)于600～1000mm。

水(shui)(shui)環(huan)(huan)(huan)(huan)(huan)泵(beng)(beng)(beng):水(shui)(shui)環(huan)(huan)(huan)(huan)(huan)真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)（簡(jian)稱水(shui)(shui)環(huan)(huan)(huan)(huan)(huan)泵(beng)(beng)(beng)）是一(yi)種粗真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)(beng)，它所能獲得的(de)(de)(de)極限真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)為(wei)2000~4000Pa，串聯大氣噴射器可(ke)達(da)270~670Pa。水(shui)(shui)環(huan)(huan)(huan)(huan)(huan)泵(beng)(beng)(beng)也可(ke)用作(zuo)壓(ya)縮機(ji)(ji)，稱為(wei)水(shui)(shui)環(huan)(huan)(huan)(huan)(huan)式壓(ya)縮機(ji)(ji)，是屬于低壓(ya)的(de)(de)(de)壓(ya)縮機(ji)(ji)，其壓(ya)力范圍為(wei)1~2×105Pa表壓(ya)力。水(shui)(shui)環(huan)(huan)(huan)(huan)(huan)泵(beng)(beng)(beng)初用作(zuo)自吸水(shui)(shui)泵(beng)(beng)(beng)，而后(hou)逐漸用于石油(you)、化工(gong)、機(ji)(ji)械(xie)、礦山、輕工(gong)、及(ji)食品(pin)等(deng)(deng)許多工(gong)業(ye)部(bu)門(men)。在(zai)工(gong)業(ye)生產的(de)(de)(de)許多工(gong)藝過(guo)程中(zhong)(zhong)，如真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)過(guo)濾、真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)引水(shui)(shui)、真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)送料、真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)蒸發(fa)、真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)濃縮、真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)回(hui)潮和(he)真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)脫(tuo)氣等(deng)(deng)，水(shui)(shui)環(huan)(huan)(huan)(huan)(huan)泵(beng)(beng)(beng)得到(dao)廣泛的(de)(de)(de)應(ying)(ying)用。由(you)(you)于真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)應(ying)(ying)用技(ji)術(shu)的(de)(de)(de)飛(fei)躍發(fa)展(zhan)，水(shui)(shui)環(huan)(huan)(huan)(huan)(huan)泵(beng)(beng)(beng)在(zai)粗真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)獲得方面(mian)一(yi)直(zhi)被人們(men)所重(zhong)視。由(you)(you)于水(shui)(shui)環(huan)(huan)(huan)(huan)(huan)泵(beng)(beng)(beng)中(zhong)(zhong)氣體(ti)壓(ya)縮是等(deng)(deng)溫(wen)的(de)(de)(de)，故可(ke)抽除、的(de)(de)(de)氣體(ti)，此外(wai)(wai)還(huan)可(ke)抽除含(han)塵(chen)、含(han)水(shui)(shui)的(de)(de)(de)氣體(ti)，因此，水(shui)(shui)環(huan)(huan)(huan)(huan)(huan)泵(beng)(beng)(beng)應(ying)(ying)用日益增多。如圖：在(zai)泵(beng)(beng)(beng)體(ti)中(zhong)(zhong)裝有(you)適量的(de)(de)(de)水(shui)(shui)作(zuo)為(wei)工(gong)作(zuo)液(ye)。當葉(xie)輪(lun)按圖中(zhong)(zhong)順(shun)時(shi)(shi)(shi)針方向旋轉(zhuan)(zhuan)時(shi)(shi)(shi)，水(shui)(shui)環(huan)(huan)(huan)(huan)(huan)的(de)(de)(de)上部(bu)內表面(mian)剛好與(yu)葉(xie)片頂端接(jie)觸(chu)（實際上葉(xie)片在(zai)水(shui)(shui)環(huan)(huan)(huan)(huan)(huan)內有(you)一(yi)定的(de)(de)(de)插入(ru) 深度）。此時(shi)(shi)(shi)葉(xie)輪(lun)輪(lun)轂與(yu)水(shui)(shui)環(huan)(huan)(huan)(huan)(huan)之間(jian)(jian)形(xing)成一(yi)個月牙形(xing)空(kong)(kong)(kong)(kong)(kong)(kong)間(jian)(jian)，而這一(yi)空(kong)(kong)(kong)(kong)(kong)(kong)間(jian)(jian)又被葉(xie)輪(lun)分成和(he)葉(xie)片數目(mu)相(xiang)等(deng)(deng)的(de)(de)(de)若干個小(xiao)(xiao)腔(qiang)。如果(guo)以葉(xie)輪(lun)的(de)(de)(de)下部(bu)0°為(wei)起點，那么葉(xie)輪(lun)在(zai)旋轉(zhuan)(zhuan)前180°時(shi)(shi)(shi)小(xiao)(xiao)腔(qiang)的(de)(de)(de)容積(ji)由(you)(you)小(xiao)(xiao)變大，且與(yu)端面(mian)上的(de)(de)(de)吸氣口相(xiang)通，此時(shi)(shi)(shi)氣體(ti)被吸入(ru)，當吸氣終了(le)時(shi)(shi)(shi)小(xiao)(xiao)腔(qiang)則(ze)與(yu)吸氣口隔絕(jue)；當葉(xie)輪(lun)繼(ji)續旋轉(zhuan)(zhuan)時(shi)(shi)(shi)，小(xiao)(xiao)腔(qiang)由(you)(you)大變小(xiao)(xiao)，使(shi)氣體(ti)被壓(ya)縮；當小(xiao)(xiao)腔(qiang)與(yu)排(pai)(pai)氣口相(xiang)通時(shi)(shi)(shi)，氣體(ti)便被排(pai)(pai)出泵(beng)(beng)(beng)外(wai)(wai)。

多級(ji)離心真空泵出水(shui)(shui)(shui)(shui)管(guan)(guan)口(kou)在(zai)(zai)出水(shui)(shui)(shui)(shui)池正(zheng)常(chang)水(shui)(shui)(shui)(shui)位(wei)以上　　若是出水(shui)(shui)(shui)(shui)口(kou)在(zai)(zai)出水(shui)(shui)(shui)(shui)池正(zheng)常(chang)水(shui)(shui)(shui)(shui)位(wei)以上，雖(sui)添加了水(shui)(shui)(shui)(shui)真空泵揚程，但削(xue)減了流量。如因地(di)勢條件所限，出水(shui)(shui)(shui)(shui)口(kou)有必(bi)要高出出水(shui)(shui)(shui)(shui)池水(shui)(shui)(shui)(shui)位(wei)，則應在(zai)(zai)管(guan)(guan)口(kou)加裝彎(wan)頭和短管(guan)(guan)，使水(shui)(shui)(shui)(shui)管(guan)(guan)變成虹吸式，下降出水(shui)(shui)(shui)(shui)口(kou)高度。

設底閥(fa)時，進(jin)水(shui)(shui)(shui)管(guan)下一(yi)節(jie)不是(shi)筆(bi)直(zhi)的　　如(ru)這(zhe)樣裝(zhuang)置，閥(fa)門不能自行封閉，形成漏水(shui)(shui)(shui)。正確裝(zhuang)置辦法是(shi)：裝(zhuang)有(you)底閥(fa)的進(jin)水(shui)(shui)(shui)管(guan)，下一(yi)節(jie)佳是(shi)筆(bi)直(zhi)的。如(ru)因地勢(shi)條件約束不能筆(bi)直(zhi)裝(zhuang)置，則水(shui)(shui)(shui)管(guan)軸線與水(shui)(shui)(shui)平(ping)面(mian)夾(jia)角應在60°以上。