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渣漿泵功率流量曲線繪制方法
同樣，先將理論功率Pt和理論流量Qt關系在圖1- 30中表示為曲線1.在理想情況下Pt=Pe=Ph，所以曲線1 也是po-Qr曲線。在實際條件下，由于存在機械摩擦損失功率△Pm。且P=Ph+△Pm，而△Pm基本上與流量無關，故可將曲線1上各點的縱坐標上移△Pm后就得到泵的軸功率P與理論流量Qr(P-Qr)曲線(曲線2)。當考慮泵的流量損失影響時，將圖1-29中H-q及H-Qr曲線也畫在圖1- 30上(曲線3和曲線4),從P-Qr各點的橫坐標減去相當H下的q ,得到恒定轉速下實際的軸功率P與流量Q(P-Q)性能曲線(曲線5)。因為機械損失功率△Pm及其他各種水力損失都無法計算,所以P-Q曲線只能通過試驗測定繪出。渣漿泵
Drawing method of power flow curve of slurry pump
In the same way, the relationship between theoretical power Pt and theoretical flow QT is represented as curve 1 in Figure 1-30. In an ideal case, Pt = PE = pH, so curve 1 is also Po QR curve. In actual conditions, due to the existence of mechanical friction loss power △ PM. And P = Ph + △ PM, but △ PM basically has nothing to do with the flow, so the vertical coordinates of each point on curve 1 can be moved up △ PM to get the curve of pump shaft power P and theoretical flow QR (p-qr) (curve 2). When considering the influence of pump flow loss, H-Q and h-qr curves in Fig. 1-29 are also drawn on Fig. 1-30 (curves 3 and 4). The actual performance curves of shaft power P and flow Q (P-Q) under constant speed are obtained by subtracting Q under equivalent h from the abscissa of p-qr points (curve 5). Because the mechanical loss power △ PM and other various hydraulic losses can not be calculated, the P-Q curve can only be drawn through the test. Slurry pump
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