混(hun)(hun)(hun)流泵(beng)(beng)(beng)(beng)的(de)(de)特點是揚程(cheng)中等,抗氣(qi)(qi)穴性能好,流童較(jiao)大(da),體(ti)(ti)積小,重全輕(qing),工程(cheng)黃(huang)小,投資省(sheng),制造、安裝、維修均較(jiao)方便(bian),在(zai)微山縣湖西地區,及(ji)湖東丘陵地區使(shi)用較(jiao)為普遮。但混(hun)(hun)(hun)流泵(beng)(beng)(beng)(beng)在(zai)抽(chou)水(shui)(shui)(shui)前,必須將(jiang)泵(beng)(beng)(beng)(beng)內和吸水(shui)(shui)(shui)管(guan)(guan)(guan)內灌滿水(shui)(shui)(shui)或用真空(kong)(kong)(kong)泵(beng)(beng)(beng)(beng)抽(chou)氣(qi)(qi),由于裝上底(di)閥(fa),增加(jia)了水(shui)(shui)(shui)泵(beng)(beng)(beng)(beng)損失揚程(cheng),影響(xiang)水(shui)(shui)(shui)泵(beng)(beng)(beng)(beng)出(chu)(chu)(chu)水(shui)(shui)(shui)黃(huang)。若裝上真空(kong)(kong)(kong)泵(beng)(beng)(beng)(beng)抽(chou)真空(kong)(kong)(kong),即(ji)增加(jia)了工程(cheng)投資,啟動也不便(bian)。為更(geng)好地使(shi)用混(hun)(hun)(hun)流泵(beng)(beng)(beng)(beng),我們(men)參照自吸式(shi)離(li)心(xin)泵(beng)(beng)(beng)(beng)的(de)(de)原(yuan)理(li),將(jiang)進(jin)水(shui)(shui)(shui)側增加(jia)一個彎管(guan)(guan)(guan),使(shi)彎管(guan)(guan)(guan)高于泵(beng)(beng)(beng)(beng)體(ti)(ti),泵(beng)(beng)(beng)(beng)體(ti)(ti)內始(shi)終有水(shui)(shui)(shui),就能較(jiao)好解決混(hun)(hun)(hun)流泵(beng)(beng)(beng)(beng)的(de)(de)啟動問題,同時(shi)使(shi)泵(beng)(beng)(beng)(beng)的(de)(de)出(chu)(chu)(chu)水(shui)(shui)(shui)流量增加(jia),抽(chou)功率(lv)減少,經(jing)濟效益大(da)大(da)提(ti)高。 墓(mu)本(ben)(ben)工作原(yuan)理(li)是:在(zai)啟動前將(jiang)泵(beng)(beng)(beng)(beng)內灌滿水(shui)(shui)(shui),葉(xie)(xie)輪(lun)(lun)轉動時(shi),儲存(cun)的(de)(de)水(shui)(shui)(shui)在(zai)離(li)心(xin)力的(de)(de)作用下,被甩到葉(xie)(xie)輪(lun)(lun)外緣,葉(xie)(xie)輪(lun)(lun)入口處形成(cheng)真空(kong)(kong)(kong),進(jin)水(shui)(shui)(shui)管(guan)(guan)(guan)中的(de)(de)空(kong)(kong)(kong)氣(qi)(qi)被吸入葉(xie)(xie)輪(lun)(lun),在(zai)葉(xie)(xie)輪(lun)(lun)外球形成(cheng)的(de)(de)氣(qi)(qi)水(shui)(shui)(shui)混(hun)(hun)(hun)合體(ti)(ti)沿蝸(gua)殼上升(sheng),進(jin)入出(chu)(chu)(chu)水(shui)(shui)(shui)管(guan)(guan)(guan),由于體(ti)(ti)積增大(da),氣(qi)(qi)水(shui)(shui)(shui)混(hun)(hun)(hun)合體(ti)(ti)流速(su)減小,空(kong)(kong)(kong)氣(qi)(qi)由出(chu)(chu)(chu)水(shui)(shui)(shui)管(guan)(guan)(guan)溢出(chu)(chu)(chu),水(shui)(shui)(shui)由于自重經(jing)蝸(gua)殼流道流回(hui),并(bing)墓(mu)本(ben)(ben)上沿葉(xie)(xie)輪(lun)(lun)外緣切線方向(xiang)進(jin)入泵(beng)(beng)(beng)(beng)殼和泵(beng)(beng)(beng)(beng)內空(kong)(kong)(kong)氣(qi)(qi)再次混(hun)(hun)(hun)合,這樣反復多次,吸水(shui)(shui)(shui)管(guan)(guan)(guan)中的(de)(de)空(kong)(kong)(kong)氣(qi)(qi)經(jing)過4一7min被逐(zhu)漸排(pai)出(chu)(chu)(chu),水(shui)(shui)(shui)慢慢地由出(chu)(chu)(chu)水(shui)(shui)(shui)管(guan)(guan)(guan)流出(chu)(chu)(chu),流速(su)逐(zhu)漸加(jia)快(kuai),流童經(jing)過lmin時(shi)間達到設計流貢,水(shui)(shui)(shui)泵(beng)(beng)(beng)(beng)開始(shi)正常出(chu)(chu)(chu)水(shui)(shui)(shui)。

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