head capacity curve 中文意思是什麼
head capacity curve
解釋
水頭 容量曲線-
Second order polynomial regression mathematical model treatment of flow capacity - lift head property curve of centrifugal pump
揚程性能曲線的二階多項式回歸數學模型處理 -
First super - low specific - speed centrifugal pump has a long and narrow flow passage for its high head and low capacity, and the power absorbed by disc friction is too high, so the efficiency is very low ; secondly the diffusion of flow passage is so high, that the reserved flow often emerges at the inlet and outlet of impeller. therefore the h ~ q characteristic curve is often hump - shaped, and at the low - capacity operating condition the instability often occurs ; thirdly the centrifugal pump at high - capacity operating condition is easy to overload because the n ~ q curve appears a rising trend
首先由於它的揚程較高、流量較小,所以它的流道狹長,圓盤摩擦損失較大,效率相對較低;其次由於它的流道擴散較嚴重,易在葉片進口產生迴流和在出口產生脫流,揚程流量特性曲線易出現駝峰,在小流量工況下易產生不穩定現象;第三,由於其功率流量曲線呈現上升趨勢,在大流量區運行時電機易過載。
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