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渣浆泵功率流量曲线绘制方法
添加时间:2020.01.31

渣浆泵功率流量曲线绘制方法
    同样,先将理论功率Pt和理论流量Qt关系在图1- 30中表示为曲线1。在理想情况下Pt=Pe=Ph所以曲线也是po-Qr曲线。在实际条件下,由于存在机械摩擦损失功率Pm。P=Ph+Pm,Pm基本上与流量无关,故可将曲线1上各点的纵坐标上移Pm后就得到泵的轴功率P与理论流量Qr(P-Qr)曲线(曲线2)。当考虑泵的流量损失影响时,将图1-29H-qH-Qr曲线也画在图1- 30(曲线3和曲线4),P-Qr各点的横坐标减去相当H下的q ,得到恒定转速下实际的轴功率P与流量Q(P-Q)性能曲线(曲线5)。因为机械损失功率Pm及其他各种水力损失都无法计算,所以P-Q曲线只能通过试验测定绘出。渣浆泵

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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