low-head centrifugal pump 中文意思是什麼

low-head centrifugal pump 解釋
低水頭離心泵
  • low : adj 1 低的；淺的，矮的。 low flight 低飛。 a low temperature 低溫。 low tide [water] 低潮。 The g...
  • head : n 1 頭，頭部，首。2 頭腦，才能；智力，想像力，理解力。3 前部，上部；頂端，尖突部；船長；（書頁等...
  • centrifugal : adj. 1. 離心的 （opp. centripetal）；應用離心力的。2. 【生物學】輸出的，排泄的。n. 離心機。adv. -ly
  • pump : PUMP ＝politically upwardly mobile personality 政治新星，政治上有望晉升人士。n （淺口無帶的）輕舞...
  1. It is a vane pump with high head, small flow and low specific speed, which is smaller, flight and simpler in structure than positive displacement pump mulfistage centrifugal pump, and may handle liquid of high gas or steam content

    該泵是一種高揚程，低比速的葉片泵，比容積式泵和多級離心泵體積小、重量輕、機構簡單等優點，並可以輸送氣體或蒸氣含量較輕的液體。
  2. 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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