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哪些因素影響著計量泵計量精度
來源： 發(fā)布時間：2017-01-13 09:56:46 瀏覽次數(shù)：次
計量精度受多方面因素的影響，如工作溫度、粘度、汽蝕條件、工況壓力變化等。盡管行程和泵速(頻率)都可以作為調(diào)節(jié)變量，但在工程應(yīng)用中一般將行程視為一次調(diào)變量，泵速(頻率)調(diào)節(jié)為二次調(diào)變量，調(diào)節(jié)行程長度至一定值，然后通過改變其泵速實現(xiàn)二次細(xì)調(diào)節(jié)，這是造成計量泵精度低的主要原因之一。其次，補(bǔ)油系統(tǒng)不暢以及進(jìn)出口閥組開閥不順等，也是影響計量泵精度的主要因素。
計量泵的調(diào)量表實際上只是調(diào)節(jié)行程的相對大小。改變流量的大小。不能視同“標(biāo)尺”或“量桶”來表示泵輸送流量多少。要得到高精度流量值，不能僅僅依靠調(diào)量表讀數(shù)來代替計量泵的輸送流量值，同時也不可完全依靠計量泵出廠標(biāo)定曲線來設(shè)定流量(因隨介質(zhì)、泵使用程度、壓差而變化)。計量泵的精準(zhǔn)計量首先是流重復(fù)性和再現(xiàn)性、標(biāo)定值的穩(wěn)定性；其次貓通過進(jìn)人系統(tǒng)流量計量表或液位計的信號反饋來控制流量點(diǎn)。由反饋信號來指揮調(diào)整泵速或行程的改變，滿足工藝流量的要求。計量泵：www.www.bjxbb.com
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