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計量泵技術(shù)
您的當前位置：巴特首頁 > 技術(shù)支持 > 計量泵技術(shù) >計量泵的工作原理和優(yōu)缺點
來源：巴特計量泵、齒輪泵公司 發(fā)布時間：2014-02-08 15:30:42 瀏覽次數(shù)：次
1、變?nèi)莘e式計量泵的工作原理和優(yōu)缺點
?。?）、往復計量泵、旋片計量泵、滑閥計量泵、羅茨計量泵是靠活塞往復運動或旋轉(zhuǎn)將氣體吸入、壓縮并排出。它們的優(yōu)點是新投入使用的泵真空度相對比較高，但是活塞是運轉(zhuǎn)部件，因此活塞的磨損是避免不了的，隨著檢修次數(shù)的增加工作真空度將不斷下降，直至滿足不了生產(chǎn)的要求。此類泵工作噪音大，耗油量大，故障率高也是其致命的缺點，一般都需要開一臺備用一臺，這無形中增加了設(shè)備投資與運行費用。另外如果用此類泵抽吸水蒸汽等可凝性氣體，將使?jié)櫥腿榛?，因此只能應用在抽吸不凝性（空氣類）氣體，也不能抽吸帶有顆粒狀的介質(zhì)，這也就限制了其適用范圍。
（2）、水環(huán)計量泵是靠裝在泵殼內(nèi)的帶有多葉片的偏心轉(zhuǎn)子旋轉(zhuǎn)，把水拋向泵殼形成與泵殼同心的水環(huán)，水環(huán)與轉(zhuǎn)子葉片形成了容積周期變化從而將氣體吸入、壓縮并排出。它的優(yōu)點是低真空時抽氣量大、可以直接抽吸水蒸汽等可凝性氣體。它的缺點是真空度低；不能抽吸帶有顆粒狀的介質(zhì)；轉(zhuǎn)子高速旋轉(zhuǎn)不易做防腐處理，因此不能抽吸具有腐蝕性的介質(zhì)。
2、噴射計量泵的工作原理和優(yōu)缺點
噴射計量泵是利用文丘里效應的壓力降產(chǎn)生的高速射流把氣體輸送到出口的一種動量傳輸磁力泵泵。它分為水噴射計量泵、蒸汽噴射計量泵、汽水串聯(lián)噴射計量泵、汽水組合噴射計量泵。噴射計量泵以其真空度范圍廣，可以直接抽吸水蒸汽等可凝性氣體和帶有顆粒狀的介質(zhì)油泵，結(jié)構(gòu)簡單，操作方便，無運轉(zhuǎn)部件維修量小，人事人才節(jié)能降耗等優(yōu)點越來越廣泛的應用在化工操作的各工藝中。
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