立式管道離心泵的安裝技術(shù)關(guān)鍵在于確定離心泵安裝高度即吸程。這個高度是指水源水面到立式管道離心泵葉輪中心線的垂直距離，它與允許吸上真空高度不能混為一談，水泵產(chǎn)品說明書或銘牌上標(biāo)示的允許吸上真空高度是指水泵進水口斷面上的真空值，而且是在1標(biāo)準(zhǔn)大氣壓下、水溫20℃情況下，進行試驗而測定得的。它并沒有考慮吸水管道配套以后的水流狀況。而水泵安裝高度應(yīng)該是允許吸上真空高度扣除了吸水管道損失揚程以后，所剩下的那部分?jǐn)?shù)值，它要克服實際地形吸水高度。水泵安裝高度不能超過計算值，否則，離心泵將會抽不上水來。另外，影響計算值的大小是吸水管道的阻力損失揚程，因此，宜采用短的管路布置，并盡量少裝彎頭等配件，也可考慮適當(dāng)配大一些口徑的立式管道離心泵水管，以減管內(nèi)流速(圖\文m.ds128.cn/)。
中譯英：
Vertical pipeline centrifugal pump installation technology is the key to determine the suction centrifugal pump installation height. This highly refers to the water surface to the vertical pipeline centrifugal pump impeller centerline vertical distance, and it allows suction vacuum height can not be confused, pump product brochures or nameplate marking allows suction vacuum height refers to the value of the vacuum on the water inlet of the water pump section, and in1 standard atmospheric pressure, water temperature 20℃condition next, the test and measurement. It does not take into account the suction pipe supporting later flow condition. And the pump mounting height should be allowed to deduct the suction vacuum suction piping loss of lift, the remaining portion of numerical value, it is to overcome the real terrain suction height. Pump mounting height should not exceed the calculated value, otherwise, centrifugal pump will be pumped to not Sheung shui. In addition, affect the calculation value is the size of the suction piping resistance loss of lift, therefore, should adopt the most short circuit arrangement, and minimize the loaded elbow parts, may also be considered appropriate with a larger caliber vertical pipeline centrifugal pump water pipe, to reduce the flow velocity in the tube.
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